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Diffstat (limited to 'src/qtquick1/graphicsitems/qdeclarativelistview.cpp')
| -rw-r--r-- | src/qtquick1/graphicsitems/qdeclarativelistview.cpp | 3645 |
1 files changed, 0 insertions, 3645 deletions
diff --git a/src/qtquick1/graphicsitems/qdeclarativelistview.cpp b/src/qtquick1/graphicsitems/qdeclarativelistview.cpp deleted file mode 100644 index c625fbd965..0000000000 --- a/src/qtquick1/graphicsitems/qdeclarativelistview.cpp +++ /dev/null @@ -1,3645 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** This file is part of the QtDeclarative module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** This file may be used under the terms of the GNU Lesser General Public -** License version 2.1 as published by the Free Software Foundation and -** appearing in the file LICENSE.LGPL included in the packaging of this -** file. Please review the following information to ensure the GNU Lesser -** General Public License version 2.1 requirements will be met: -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "QtQuick1/private/qdeclarativelistview_p.h" - -#include "QtQuick1/private/qdeclarativeflickable_p_p.h" -#include "QtQuick1/private/qdeclarativevisualitemmodel_p.h" - -#include "QtQuick1/private/qdeclarativesmoothedanimation_p_p.h" -#include <QtDeclarative/qdeclarativeexpression.h> -#include <QtDeclarative/qdeclarativeengine.h> -#include <QtDeclarative/private/qdeclarativeguard_p.h> -#include <QtDeclarative/qdeclarativeinfo.h> - -#include <qmath.h> -#include <QKeyEvent> -#include "qplatformdefs.h" - -QT_BEGIN_NAMESPACE - -#ifndef QML_FLICK_SNAPONETHRESHOLD -#define QML_FLICK_SNAPONETHRESHOLD 30 -#endif - -void QDeclarative1ViewSection::setProperty(const QString &property) -{ - if (property != m_property) { - m_property = property; - emit propertyChanged(); - } -} - -void QDeclarative1ViewSection::setCriteria(QDeclarative1ViewSection::SectionCriteria criteria) -{ - if (criteria != m_criteria) { - m_criteria = criteria; - emit criteriaChanged(); - } -} - -void QDeclarative1ViewSection::setDelegate(QDeclarativeComponent *delegate) -{ - if (delegate != m_delegate) { - m_delegate = delegate; - emit delegateChanged(); - } -} - -QString QDeclarative1ViewSection::sectionString(const QString &value) -{ - if (m_criteria == FirstCharacter) - return value.isEmpty() ? QString() : value.at(0); - else - return value; -} - -//---------------------------------------------------------------------------- - -class FxListItem1 -{ -public: - FxListItem1(QDeclarativeItem *i, QDeclarative1ListView *v) : item(i), section(0), view(v) { - attached = static_cast<QDeclarative1ListViewAttached*>(qmlAttachedPropertiesObject<QDeclarative1ListView>(item)); - if (attached) - attached->setView(view); - } - ~FxListItem1() {} - qreal position() const { - if (section) { - if (view->orientation() == QDeclarative1ListView::Vertical) - return section->y(); - else - return (view->effectiveLayoutDirection() == Qt::RightToLeft ? -section->width()-section->x() : section->x()); - } else { - return itemPosition(); - } - } - - qreal itemPosition() const { - if (view->orientation() == QDeclarative1ListView::Vertical) - return item->y(); - else - return (view->effectiveLayoutDirection() == Qt::RightToLeft ? -item->width()-item->x() : item->x()); - } - qreal size() const { - if (section) - return (view->orientation() == QDeclarative1ListView::Vertical ? item->height()+section->height() : item->width()+section->width()); - else - return (view->orientation() == QDeclarative1ListView::Vertical ? item->height() : item->width()); - } - qreal itemSize() const { - return (view->orientation() == QDeclarative1ListView::Vertical ? item->height() : item->width()); - } - qreal sectionSize() const { - if (section) - return (view->orientation() == QDeclarative1ListView::Vertical ? section->height() : section->width()); - return 0.0; - } - qreal endPosition() const { - if (view->orientation() == QDeclarative1ListView::Vertical) { - return item->y() + (item->height() >= 1.0 ? item->height() : 1) - 1; - } else { - return (view->effectiveLayoutDirection() == Qt::RightToLeft - ? -item->width()-item->x() + (item->width() >= 1.0 ? item->width() : 1) - : item->x() + (item->width() >= 1.0 ? item->width() : 1)) - 1; - } - } - void setPosition(qreal pos) { - if (view->orientation() == QDeclarative1ListView::Vertical) { - if (section) { - section->setY(pos); - pos += section->height(); - } - item->setY(pos); - } else { - if (view->effectiveLayoutDirection() == Qt::RightToLeft) { - if (section) { - section->setX(-section->width()-pos); - pos += section->width(); - } - item->setX(-item->width()-pos); - } else { - if (section) { - section->setX(pos); - pos += section->width(); - } - item->setX(pos); - } - } - } - void setSize(qreal size) { - if (view->orientation() == QDeclarative1ListView::Vertical) - item->setHeight(size); - else - item->setWidth(size); - } - bool contains(qreal x, qreal y) const { - return (x >= item->x() && x < item->x() + item->width() && - y >= item->y() && y < item->y() + item->height()); - } - - QDeclarativeItem *item; - QDeclarativeItem *section; - QDeclarative1ListView *view; - QDeclarative1ListViewAttached *attached; - int index; -}; - -//---------------------------------------------------------------------------- - -class QDeclarative1ListViewPrivate : public QDeclarative1FlickablePrivate -{ - Q_DECLARE_PUBLIC(QDeclarative1ListView) - -public: - QDeclarative1ListViewPrivate() - : currentItem(0), orient(QDeclarative1ListView::Vertical), layoutDirection(Qt::LeftToRight) - , visiblePos(0), visibleIndex(0) - , averageSize(100.0), currentIndex(-1), requestedIndex(-1) - , itemCount(0), highlightRangeStart(0), highlightRangeEnd(0) - , highlightRangeStartValid(false), highlightRangeEndValid(false) - , highlightComponent(0), highlight(0), trackedItem(0) - , moveReason(Other), buffer(0), highlightPosAnimator(0), highlightSizeAnimator(0) - , sectionCriteria(0), spacing(0.0) - , highlightMoveSpeed(400), highlightMoveDuration(-1) - , highlightResizeSpeed(400), highlightResizeDuration(-1), highlightRange(QDeclarative1ListView::NoHighlightRange) - , snapMode(QDeclarative1ListView::NoSnap), overshootDist(0.0) - , footerComponent(0), footer(0), headerComponent(0), header(0) - , bufferMode(BufferBefore | BufferAfter) - , ownModel(false), wrap(false), autoHighlight(true), haveHighlightRange(false) - , correctFlick(false), inFlickCorrection(false), lazyRelease(false) - , deferredRelease(false), layoutScheduled(false), currentIndexCleared(false) - , inViewportMoved(false) - , minExtentDirty(true), maxExtentDirty(true) - {} - - void init(); - void clear(); - FxListItem1 *createItem(int modelIndex); - void releaseItem(FxListItem1 *item); - - FxListItem1 *visibleItem(int modelIndex) const { - if (modelIndex >= visibleIndex && modelIndex < visibleIndex + visibleItems.count()) { - for (int i = modelIndex - visibleIndex; i < visibleItems.count(); ++i) { - FxListItem1 *item = visibleItems.at(i); - if (item->index == modelIndex) - return item; - } - } - return 0; - } - - FxListItem1 *firstVisibleItem() const { - const qreal pos = isRightToLeft() ? -position()-size() : position(); - for (int i = 0; i < visibleItems.count(); ++i) { - FxListItem1 *item = visibleItems.at(i); - if (item->index != -1 && item->endPosition() > pos) - return item; - } - return visibleItems.count() ? visibleItems.first() : 0; - } - - // Returns the item before modelIndex, if created. - // May return an item marked for removal. - FxListItem1 *itemBefore(int modelIndex) const { - if (modelIndex < visibleIndex) - return 0; - int idx = 1; - int lastIndex = -1; - while (idx < visibleItems.count()) { - FxListItem1 *item = visibleItems.at(idx); - if (item->index != -1) - lastIndex = item->index; - if (item->index == modelIndex) - return visibleItems.at(idx-1); - ++idx; - } - if (lastIndex == modelIndex-1) - return visibleItems.last(); - return 0; - } - - void regenerate() { - Q_Q(QDeclarative1ListView); - if (q->isComponentComplete()) { - if (header) { - if (q->scene()) - q->scene()->removeItem(header->item); - header->item->deleteLater(); - delete header; - header = 0; - } - if (footer) { - if (q->scene()) - q->scene()->removeItem(footer->item); - footer->item->deleteLater(); - delete footer; - footer = 0; - } - updateHeader(); - updateFooter(); - clear(); - setPosition(0); - q->refill(); - updateCurrent(currentIndex); - } - } - - void mirrorChange() { - Q_Q(QDeclarative1ListView); - regenerate(); - emit q->effectiveLayoutDirectionChanged(); - } - - bool isRightToLeft() const { - Q_Q(const QDeclarative1ListView); - return orient == QDeclarative1ListView::Horizontal && q->effectiveLayoutDirection() == Qt::RightToLeft; - } - - qreal position() const { - Q_Q(const QDeclarative1ListView); - return orient == QDeclarative1ListView::Vertical ? q->contentY() : q->contentX(); - } - - void setPosition(qreal pos) { - Q_Q(QDeclarative1ListView); - if (orient == QDeclarative1ListView::Vertical) { - q->QDeclarative1Flickable::setContentY(pos); - } else { - if (isRightToLeft()) - q->QDeclarative1Flickable::setContentX(-pos-size()); - else - q->QDeclarative1Flickable::setContentX(pos); - } - } - qreal size() const { - Q_Q(const QDeclarative1ListView); - return orient == QDeclarative1ListView::Vertical ? q->height() : q->width(); - } - - qreal originPosition() const { - qreal pos = 0; - if (!visibleItems.isEmpty()) { - pos = (*visibleItems.constBegin())->position(); - if (visibleIndex > 0) - pos -= visibleIndex * (averageSize + spacing); - } - return pos; - } - - qreal lastPosition() const { - qreal pos = 0; - if (!visibleItems.isEmpty()) { - int invisibleCount = visibleItems.count() - visibleIndex; - for (int i = visibleItems.count()-1; i >= 0; --i) { - if (visibleItems.at(i)->index != -1) { - invisibleCount = model->count() - visibleItems.at(i)->index - 1; - break; - } - } - pos = (*(--visibleItems.constEnd()))->endPosition() + invisibleCount * (averageSize + spacing); - } else if (model && model->count()) { - pos = model->count() * averageSize + (model->count()-1) * spacing; - } - return pos; - } - - qreal startPosition() const { - return isRightToLeft() ? -lastPosition()-1 : originPosition(); - } - - qreal endPosition() const { - return isRightToLeft() ? -originPosition()-1 : lastPosition(); - } - - qreal positionAt(int modelIndex) const { - if (FxListItem1 *item = visibleItem(modelIndex)) - return item->position(); - if (!visibleItems.isEmpty()) { - if (modelIndex < visibleIndex) { - int count = visibleIndex - modelIndex; - qreal cs = 0; - if (modelIndex == currentIndex && currentItem) { - cs = currentItem->size() + spacing; - --count; - } - return (*visibleItems.constBegin())->position() - count * (averageSize + spacing) - cs; - } else { - int idx = visibleItems.count() - 1; - while (idx >= 0 && visibleItems.at(idx)->index == -1) - --idx; - if (idx < 0) - idx = visibleIndex; - else - idx = visibleItems.at(idx)->index; - int count = modelIndex - idx - 1; - - return (*(--visibleItems.constEnd()))->endPosition() + spacing + count * (averageSize + spacing) + 1; - } - } - return 0; - } - - qreal endPositionAt(int modelIndex) const { - if (FxListItem1 *item = visibleItem(modelIndex)) - return item->endPosition(); - if (!visibleItems.isEmpty()) { - if (modelIndex < visibleIndex) { - int count = visibleIndex - modelIndex; - return (*visibleItems.constBegin())->position() - (count - 1) * (averageSize + spacing) - spacing - 1; - } else { - int idx = visibleItems.count() - 1; - while (idx >= 0 && visibleItems.at(idx)->index == -1) - --idx; - if (idx < 0) - idx = visibleIndex; - else - idx = visibleItems.at(idx)->index; - int count = modelIndex - idx - 1; - return (*(--visibleItems.constEnd()))->endPosition() + count * (averageSize + spacing); - } - } - return 0; - } - - QString sectionAt(int modelIndex) { - if (FxListItem1 *item = visibleItem(modelIndex)) - return item->attached->section(); - - QString section; - if (sectionCriteria) { - QString propValue = model->stringValue(modelIndex, sectionCriteria->property()); - section = sectionCriteria->sectionString(propValue); - } - - return section; - } - - bool isValid() const { - return model && model->count() && model->isValid(); - } - - qreal snapPosAt(qreal pos) { - if (FxListItem1 *snapItem = snapItemAt(pos)) - return snapItem->position(); - if (visibleItems.count()) { - qreal firstPos = visibleItems.first()->position(); - qreal endPos = visibleItems.last()->position(); - if (pos < firstPos) { - return firstPos - qRound((firstPos - pos) / averageSize) * averageSize; - } else if (pos > endPos) - return endPos + qRound((pos - endPos) / averageSize) * averageSize; - } - return qRound((pos - originPosition()) / averageSize) * averageSize + originPosition(); - } - - FxListItem1 *snapItemAt(qreal pos) { - FxListItem1 *snapItem = 0; - qreal prevItemSize = 0; - for (int i = 0; i < visibleItems.count(); ++i) { - FxListItem1 *item = visibleItems[i]; - if (item->index == -1) - continue; - qreal itemTop = item->position(); - if (highlight && itemTop >= pos && item->endPosition() <= pos + highlight->size() - 1) - return item; - if (itemTop+item->size()/2 >= pos && itemTop-prevItemSize/2 < pos) - snapItem = item; - prevItemSize = item->size(); - } - return snapItem; - } - - int lastVisibleIndex() const { - int lastIndex = -1; - for (int i = visibleItems.count()-1; i >= 0; --i) { - FxListItem1 *listItem = visibleItems.at(i); - if (listItem->index != -1) { - lastIndex = listItem->index; - break; - } - } - return lastIndex; - } - - // map a model index to visibleItems index. - int mapFromModel(int modelIndex) const { - if (modelIndex < visibleIndex || modelIndex >= visibleIndex + visibleItems.count()) - return -1; - for (int i = 0; i < visibleItems.count(); ++i) { - FxListItem1 *listItem = visibleItems.at(i); - if (listItem->index == modelIndex) - return i; - if (listItem->index > modelIndex) - return -1; - } - return -1; // Not in visibleList - } - - void updateViewport() { - Q_Q(QDeclarative1ListView); - if (orient == QDeclarative1ListView::Vertical) { - q->setContentHeight(endPosition() - startPosition() + 1); - } else { - q->setContentWidth(endPosition() - startPosition() + 1); - } - } - - void itemGeometryChanged(QDeclarativeItem *item, const QRectF &newGeometry, const QRectF &oldGeometry) { - Q_Q(QDeclarative1ListView); - QDeclarative1FlickablePrivate::itemGeometryChanged(item, newGeometry, oldGeometry); - if (!q->isComponentComplete()) - return; - if (item != contentItem && (!highlight || item != highlight->item)) { - if ((orient == QDeclarative1ListView::Vertical && newGeometry.height() != oldGeometry.height()) - || (orient == QDeclarative1ListView::Horizontal && newGeometry.width() != oldGeometry.width())) { - scheduleLayout(); - } - } - if ((header && header->item == item) || (footer && footer->item == item)) { - if (header) - updateHeader(); - if (footer) - updateFooter(); - } - if (currentItem && currentItem->item == item) - updateHighlight(); - if (trackedItem && trackedItem->item == item) - q->trackedPositionChanged(); - } - - // for debugging only - void checkVisible() const { - int skip = 0; - for (int i = 0; i < visibleItems.count(); ++i) { - FxListItem1 *listItem = visibleItems.at(i); - if (listItem->index == -1) { - ++skip; - } else if (listItem->index != visibleIndex + i - skip) { - qFatal("index %d %d %d", visibleIndex, i, listItem->index); - } - } - } - - void refill(qreal from, qreal to, bool doBuffer = false); - void scheduleLayout(); - void layout(); - void updateUnrequestedIndexes(); - void updateUnrequestedPositions(); - void updateTrackedItem(); - void createHighlight(); - void updateHighlight(); - void createSection(FxListItem1 *); - void updateSections(); - void updateCurrentSection(); - void updateCurrent(int); - void updateAverage(); - void updateHeader(); - void updateFooter(); - void fixupPosition(); - void positionViewAtIndex(int index, int mode); - virtual void fixup(AxisData &data, qreal minExtent, qreal maxExtent); - virtual void flick(QDeclarative1FlickablePrivate::AxisData &data, qreal minExtent, qreal maxExtent, qreal vSize, - QDeclarative1TimeLineCallback::Callback fixupCallback, qreal velocity); - - QDeclarativeGuard<QDeclarative1VisualModel> model; - QVariant modelVariant; - QList<FxListItem1*> visibleItems; - QHash<QDeclarativeItem*,int> unrequestedItems; - FxListItem1 *currentItem; - QDeclarative1ListView::Orientation orient; - Qt::LayoutDirection layoutDirection; - qreal visiblePos; - int visibleIndex; - qreal averageSize; - int currentIndex; - int requestedIndex; - int itemCount; - qreal highlightRangeStart; - qreal highlightRangeEnd; - bool highlightRangeStartValid; - bool highlightRangeEndValid; - QDeclarativeComponent *highlightComponent; - FxListItem1 *highlight; - FxListItem1 *trackedItem; - enum MovementReason { Other, SetIndex, Mouse }; - MovementReason moveReason; - int buffer; - QSmoothedAnimation_1 *highlightPosAnimator; - QSmoothedAnimation_1 *highlightSizeAnimator; - QDeclarative1ViewSection *sectionCriteria; - QString currentSection; - static const int sectionCacheSize = 4; - QDeclarativeItem *sectionCache[sectionCacheSize]; - qreal spacing; - qreal highlightMoveSpeed; - int highlightMoveDuration; - qreal highlightResizeSpeed; - int highlightResizeDuration; - QDeclarative1ListView::HighlightRangeMode highlightRange; - QDeclarative1ListView::SnapMode snapMode; - qreal overshootDist; - QDeclarativeComponent *footerComponent; - FxListItem1 *footer; - QDeclarativeComponent *headerComponent; - FxListItem1 *header; - enum BufferMode { NoBuffer = 0x00, BufferBefore = 0x01, BufferAfter = 0x02 }; - int bufferMode; - mutable qreal minExtent; - mutable qreal maxExtent; - - bool ownModel : 1; - bool wrap : 1; - bool autoHighlight : 1; - bool haveHighlightRange : 1; - bool correctFlick : 1; - bool inFlickCorrection : 1; - bool lazyRelease : 1; - bool deferredRelease : 1; - bool layoutScheduled : 1; - bool currentIndexCleared : 1; - bool inViewportMoved : 1; - mutable bool minExtentDirty : 1; - mutable bool maxExtentDirty : 1; -}; - -void QDeclarative1ListViewPrivate::init() -{ - Q_Q(QDeclarative1ListView); - q->setFlag(QGraphicsItem::ItemIsFocusScope); - addItemChangeListener(this, Geometry); - QObject::connect(q, SIGNAL(movementEnded()), q, SLOT(animStopped())); - q->setFlickableDirection(QDeclarative1Flickable::VerticalFlick); - ::memset(sectionCache, 0, sizeof(QDeclarativeItem*) * sectionCacheSize); -} - -void QDeclarative1ListViewPrivate::clear() -{ - timeline.clear(); - for (int i = 0; i < visibleItems.count(); ++i) - releaseItem(visibleItems.at(i)); - visibleItems.clear(); - for (int i = 0; i < sectionCacheSize; ++i) { - delete sectionCache[i]; - sectionCache[i] = 0; - } - visiblePos = header ? header->size() : 0; - visibleIndex = 0; - releaseItem(currentItem); - currentItem = 0; - createHighlight(); - trackedItem = 0; - minExtentDirty = true; - maxExtentDirty = true; - itemCount = 0; -} - -FxListItem1 *QDeclarative1ListViewPrivate::createItem(int modelIndex) -{ - Q_Q(QDeclarative1ListView); - // create object - requestedIndex = modelIndex; - FxListItem1 *listItem = 0; - if (QDeclarativeItem *item = model->item(modelIndex, false)) { - listItem = new FxListItem1(item, q); - listItem->index = modelIndex; - // initialise attached properties - if (sectionCriteria) { - QString propValue = model->stringValue(modelIndex, sectionCriteria->property()); - listItem->attached->m_section = sectionCriteria->sectionString(propValue); - if (modelIndex > 0) { - if (FxListItem1 *item = itemBefore(modelIndex)) - listItem->attached->m_prevSection = item->attached->section(); - else - listItem->attached->m_prevSection = sectionAt(modelIndex-1); - } - if (modelIndex < model->count()-1) { - if (FxListItem1 *item = visibleItem(modelIndex+1)) - listItem->attached->m_nextSection = item->attached->section(); - else - listItem->attached->m_nextSection = sectionAt(modelIndex+1); - } - } - if (model->completePending()) { - // complete - listItem->item->setZValue(1); - listItem->item->setParentItem(q->contentItem()); - model->completeItem(); - } else { - listItem->item->setParentItem(q->contentItem()); - } - QDeclarativeItemPrivate *itemPrivate = static_cast<QDeclarativeItemPrivate*>(QGraphicsItemPrivate::get(item)); - itemPrivate->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry); - if (sectionCriteria && sectionCriteria->delegate()) { - if (listItem->attached->m_prevSection != listItem->attached->m_section) - createSection(listItem); - } - unrequestedItems.remove(listItem->item); - } - requestedIndex = -1; - - return listItem; -} - -void QDeclarative1ListViewPrivate::releaseItem(FxListItem1 *item) -{ - Q_Q(QDeclarative1ListView); - if (!item || !model) - return; - if (trackedItem == item) - trackedItem = 0; - QDeclarativeItemPrivate *itemPrivate = static_cast<QDeclarativeItemPrivate*>(QGraphicsItemPrivate::get(item->item)); - itemPrivate->removeItemChangeListener(this, QDeclarativeItemPrivate::Geometry); - if (model->release(item->item) == 0) { - // item was not destroyed, and we no longer reference it. - unrequestedItems.insert(item->item, model->indexOf(item->item, q)); - } - if (item->section) { - int i = 0; - do { - if (!sectionCache[i]) { - sectionCache[i] = item->section; - sectionCache[i]->setVisible(false); - item->section = 0; - break; - } - ++i; - } while (i < sectionCacheSize); - delete item->section; - } - delete item; -} - -void QDeclarative1ListViewPrivate::refill(qreal from, qreal to, bool doBuffer) -{ - Q_Q(QDeclarative1ListView); - if (!isValid() || !q->isComponentComplete()) - return; - itemCount = model->count(); - qreal bufferFrom = from - buffer; - qreal bufferTo = to + buffer; - qreal fillFrom = from; - qreal fillTo = to; - if (doBuffer && (bufferMode & BufferAfter)) - fillTo = bufferTo; - if (doBuffer && (bufferMode & BufferBefore)) - fillFrom = bufferFrom; - - bool haveValidItems = false; - int modelIndex = visibleIndex; - qreal itemEnd = visiblePos-1; - if (!visibleItems.isEmpty()) { - visiblePos = (*visibleItems.constBegin())->position(); - itemEnd = (*(--visibleItems.constEnd()))->endPosition() + spacing; - int i = visibleItems.count() - 1; - while (i > 0 && visibleItems.at(i)->index == -1) - --i; - if (visibleItems.at(i)->index != -1) { - haveValidItems = true; - modelIndex = visibleItems.at(i)->index + 1; - } - } - - if (haveValidItems && (fillFrom > itemEnd+averageSize+spacing - || fillTo < visiblePos - averageSize - spacing)) { - // We've jumped more than a page. Estimate which items are now - // visible and fill from there. - int count = (fillFrom - itemEnd) / (averageSize + spacing); - for (int i = 0; i < visibleItems.count(); ++i) - releaseItem(visibleItems.at(i)); - visibleItems.clear(); - modelIndex += count; - if (modelIndex >= model->count()) { - count -= modelIndex - model->count() + 1; - modelIndex = model->count() - 1; - } else if (modelIndex < 0) { - count -= modelIndex; - modelIndex = 0; - } - visibleIndex = modelIndex; - visiblePos = itemEnd + count * (averageSize + spacing) + 1; - itemEnd = visiblePos-1; - } - - bool changed = false; - FxListItem1 *item = 0; - qreal pos = itemEnd + 1; - while (modelIndex < model->count() && pos <= fillTo) { -// qDebug() << "refill: append item" << modelIndex << "pos" << pos; - if (!(item = createItem(modelIndex))) - break; - item->setPosition(pos); - pos += item->size() + spacing; - visibleItems.append(item); - ++modelIndex; - changed = true; - if (doBuffer) // never buffer more than one item per frame - break; - } - while (visibleIndex > 0 && visibleIndex <= model->count() && visiblePos-1 >= fillFrom) { -// qDebug() << "refill: prepend item" << visibleIndex-1 << "current top pos" << visiblePos; - if (!(item = createItem(visibleIndex-1))) - break; - --visibleIndex; - visiblePos -= item->size() + spacing; - item->setPosition(visiblePos); - visibleItems.prepend(item); - changed = true; - if (doBuffer) // never buffer more than one item per frame - break; - } - - if (!lazyRelease || !changed || deferredRelease) { // avoid destroying items in the same frame that we create - while (visibleItems.count() > 1 && (item = visibleItems.first()) && item->endPosition() < bufferFrom) { - if (item->attached->delayRemove()) - break; -// qDebug() << "refill: remove first" << visibleIndex << "top end pos" << item->endPosition(); - if (item->index != -1) - visibleIndex++; - visibleItems.removeFirst(); - releaseItem(item); - changed = true; - } - while (visibleItems.count() > 1 && (item = visibleItems.last()) && item->position() > bufferTo) { - if (item->attached->delayRemove()) - break; -// qDebug() << "refill: remove last" << visibleIndex+visibleItems.count()-1 << item->position(); - visibleItems.removeLast(); - releaseItem(item); - changed = true; - } - deferredRelease = false; - } else { - deferredRelease = true; - } - if (changed) { - minExtentDirty = true; - maxExtentDirty = true; - if (visibleItems.count()) - visiblePos = (*visibleItems.constBegin())->position(); - updateAverage(); - if (currentIndex >= 0 && currentItem && !visibleItem(currentIndex)) { - currentItem->setPosition(positionAt(currentIndex)); - updateHighlight(); - } - - if (sectionCriteria) - updateCurrentSection(); - if (header) - updateHeader(); - if (footer) - updateFooter(); - updateViewport(); - updateUnrequestedPositions(); - } else if (!doBuffer && buffer && bufferMode != NoBuffer) { - refill(from, to, true); - } - lazyRelease = false; -} - -void QDeclarative1ListViewPrivate::scheduleLayout() -{ - Q_Q(QDeclarative1ListView); - if (!layoutScheduled) { - layoutScheduled = true; - QCoreApplication::postEvent(q, new QEvent(QEvent::User), Qt::HighEventPriority); - } -} - -void QDeclarative1ListViewPrivate::layout() -{ - Q_Q(QDeclarative1ListView); - layoutScheduled = false; - if (!isValid() && !visibleItems.count()) { - clear(); - setPosition(0); - return; - } - if (!visibleItems.isEmpty()) { - bool fixedCurrent = currentItem && visibleItems.first()->item == currentItem->item; - qreal sum = visibleItems.first()->size(); - qreal pos = visibleItems.first()->position() + visibleItems.first()->size() + spacing; - for (int i=1; i < visibleItems.count(); ++i) { - FxListItem1 *item = visibleItems.at(i); - item->setPosition(pos); - pos += item->size() + spacing; - sum += item->size(); - fixedCurrent = fixedCurrent || (currentItem && item->item == currentItem->item); - } - averageSize = qRound(sum / visibleItems.count()); - // move current item if it is not a visible item. - if (currentIndex >= 0 && currentItem && !fixedCurrent) - currentItem->setPosition(positionAt(currentIndex)); - } - q->refill(); - minExtentDirty = true; - maxExtentDirty = true; - updateHighlight(); - if (!q->isMoving() && !q->isFlicking()) { - fixupPosition(); - q->refill(); - } - if (header) - updateHeader(); - if (footer) - updateFooter(); - updateViewport(); -} - -void QDeclarative1ListViewPrivate::updateUnrequestedIndexes() -{ - Q_Q(QDeclarative1ListView); - QHash<QDeclarativeItem*,int>::iterator it; - for (it = unrequestedItems.begin(); it != unrequestedItems.end(); ++it) - *it = model->indexOf(it.key(), q); -} - -void QDeclarative1ListViewPrivate::updateUnrequestedPositions() -{ - Q_Q(QDeclarative1ListView); - if (unrequestedItems.count()) { - qreal pos = position(); - QHash<QDeclarativeItem*,int>::const_iterator it; - for (it = unrequestedItems.begin(); it != unrequestedItems.end(); ++it) { - QDeclarativeItem *item = it.key(); - if (orient == QDeclarative1ListView::Vertical) { - if (item->y() + item->height() > pos && item->y() < pos + q->height()) - item->setY(positionAt(*it)); - } else { - if (item->x() + item->width() > pos && item->x() < pos + q->width()) { - if (isRightToLeft()) - item->setX(-positionAt(*it)-item->width()); - else - item->setX(positionAt(*it)); - } - } - } - } -} - -void QDeclarative1ListViewPrivate::updateTrackedItem() -{ - Q_Q(QDeclarative1ListView); - FxListItem1 *item = currentItem; - if (highlight) - item = highlight; - trackedItem = item; - if (trackedItem) - q->trackedPositionChanged(); -} - -void QDeclarative1ListViewPrivate::createHighlight() -{ - Q_Q(QDeclarative1ListView); - bool changed = false; - if (highlight) { - if (trackedItem == highlight) - trackedItem = 0; - if (highlight->item->scene()) - highlight->item->scene()->removeItem(highlight->item); - highlight->item->deleteLater(); - delete highlight; - highlight = 0; - delete highlightPosAnimator; - delete highlightSizeAnimator; - highlightPosAnimator = 0; - highlightSizeAnimator = 0; - changed = true; - } - - if (currentItem) { - QDeclarativeItem *item = 0; - if (highlightComponent) { - QDeclarativeContext *highlightContext = new QDeclarativeContext(qmlContext(q)); - QObject *nobj = highlightComponent->create(highlightContext); - if (nobj) { - QDeclarative_setParent_noEvent(highlightContext, nobj); - item = qobject_cast<QDeclarativeItem *>(nobj); - if (!item) - delete nobj; - } else { - delete highlightContext; - } - } else { - item = new QDeclarativeItem; - } - if (item) { - QDeclarative_setParent_noEvent(item, q->contentItem()); - item->setParentItem(q->contentItem()); - highlight = new FxListItem1(item, q); - if (currentItem && autoHighlight) { - if (orient == QDeclarative1ListView::Vertical) { - highlight->item->setHeight(currentItem->item->height()); - } else { - highlight->item->setWidth(currentItem->item->width()); - } - highlight->setPosition(currentItem->itemPosition()); - } - QDeclarativeItemPrivate *itemPrivate = static_cast<QDeclarativeItemPrivate*>(QGraphicsItemPrivate::get(item)); - itemPrivate->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry); - const QLatin1String posProp(orient == QDeclarative1ListView::Vertical ? "y" : "x"); - highlightPosAnimator = new QSmoothedAnimation_1(q); - highlightPosAnimator->target = QDeclarativeProperty(highlight->item, posProp); - highlightPosAnimator->velocity = highlightMoveSpeed; - highlightPosAnimator->userDuration = highlightMoveDuration; - const QLatin1String sizeProp(orient == QDeclarative1ListView::Vertical ? "height" : "width"); - highlightSizeAnimator = new QSmoothedAnimation_1(q); - highlightSizeAnimator->velocity = highlightResizeSpeed; - highlightSizeAnimator->userDuration = highlightResizeDuration; - highlightSizeAnimator->target = QDeclarativeProperty(highlight->item, sizeProp); - if (autoHighlight) { - highlightPosAnimator->restart(); - highlightSizeAnimator->restart(); - } - changed = true; - } - } - if (changed) - emit q->highlightItemChanged(); -} - -void QDeclarative1ListViewPrivate::updateHighlight() -{ - if ((!currentItem && highlight) || (currentItem && !highlight)) - createHighlight(); - if (currentItem && autoHighlight && highlight && !hData.moving && !vData.moving) { - // auto-update highlight - highlightPosAnimator->to = isRightToLeft() - ? -currentItem->itemPosition()-currentItem->itemSize() - : currentItem->itemPosition(); - highlightSizeAnimator->to = currentItem->itemSize(); - if (orient == QDeclarative1ListView::Vertical) { - if (highlight->item->width() == 0) - highlight->item->setWidth(currentItem->item->width()); - } else { - if (highlight->item->height() == 0) - highlight->item->setHeight(currentItem->item->height()); - } - highlightPosAnimator->restart(); - highlightSizeAnimator->restart(); - } - updateTrackedItem(); -} - -void QDeclarative1ListViewPrivate::createSection(FxListItem1 *listItem) -{ - Q_Q(QDeclarative1ListView); - if (!sectionCriteria || !sectionCriteria->delegate()) - return; - if (listItem->attached->m_prevSection != listItem->attached->m_section) { - if (!listItem->section) { - qreal pos = listItem->position(); - int i = sectionCacheSize-1; - while (i >= 0 && !sectionCache[i]) - --i; - if (i >= 0) { - listItem->section = sectionCache[i]; - sectionCache[i] = 0; - listItem->section->setVisible(true); - QDeclarativeContext *context = QDeclarativeEngine::contextForObject(listItem->section)->parentContext(); - context->setContextProperty(QLatin1String("section"), listItem->attached->m_section); - } else { - QDeclarativeContext *context = new QDeclarativeContext(qmlContext(q)); - context->setContextProperty(QLatin1String("section"), listItem->attached->m_section); - QObject *nobj = sectionCriteria->delegate()->beginCreate(context); - if (nobj) { - QDeclarative_setParent_noEvent(context, nobj); - listItem->section = qobject_cast<QDeclarativeItem *>(nobj); - if (!listItem->section) { - delete nobj; - } else { - listItem->section->setZValue(1); - QDeclarative_setParent_noEvent(listItem->section, q->contentItem()); - listItem->section->setParentItem(q->contentItem()); - } - } else { - delete context; - } - sectionCriteria->delegate()->completeCreate(); - } - listItem->setPosition(pos); - } else { - QDeclarativeContext *context = QDeclarativeEngine::contextForObject(listItem->section)->parentContext(); - context->setContextProperty(QLatin1String("section"), listItem->attached->m_section); - } - } else if (listItem->section) { - qreal pos = listItem->position(); - int i = 0; - do { - if (!sectionCache[i]) { - sectionCache[i] = listItem->section; - sectionCache[i]->setVisible(false); - listItem->section = 0; - return; - } - ++i; - } while (i < sectionCacheSize); - delete listItem->section; - listItem->section = 0; - listItem->setPosition(pos); - } -} - -void QDeclarative1ListViewPrivate::updateSections() -{ - if (sectionCriteria && !visibleItems.isEmpty()) { - QString prevSection; - if (visibleIndex > 0) - prevSection = sectionAt(visibleIndex-1); - QDeclarative1ListViewAttached *prevAtt = 0; - int idx = -1; - for (int i = 0; i < visibleItems.count(); ++i) { - QDeclarative1ListViewAttached *attached = visibleItems.at(i)->attached; - attached->setPrevSection(prevSection); - if (visibleItems.at(i)->index != -1) { - QString propValue = model->stringValue(visibleItems.at(i)->index, sectionCriteria->property()); - attached->setSection(sectionCriteria->sectionString(propValue)); - idx = visibleItems.at(i)->index; - } - createSection(visibleItems.at(i)); - if (prevAtt) - prevAtt->setNextSection(attached->section()); - prevSection = attached->section(); - prevAtt = attached; - } - if (prevAtt) { - if (idx > 0 && idx < model->count()-1) - prevAtt->setNextSection(sectionAt(idx+1)); - else - prevAtt->setNextSection(QString()); - } - } -} - -void QDeclarative1ListViewPrivate::updateCurrentSection() -{ - Q_Q(QDeclarative1ListView); - if (!sectionCriteria || visibleItems.isEmpty()) { - if (!currentSection.isEmpty()) { - currentSection.clear(); - emit q->currentSectionChanged(); - } - return; - } - int index = 0; - while (index < visibleItems.count() && visibleItems.at(index)->endPosition() < position()) - ++index; - - QString newSection = currentSection; - if (index < visibleItems.count()) - newSection = visibleItems.at(index)->attached->section(); - else - newSection = visibleItems.first()->attached->section(); - if (newSection != currentSection) { - currentSection = newSection; - emit q->currentSectionChanged(); - } -} - -void QDeclarative1ListViewPrivate::updateCurrent(int modelIndex) -{ - Q_Q(QDeclarative1ListView); - if (!q->isComponentComplete() || !isValid() || modelIndex < 0 || modelIndex >= model->count()) { - if (currentItem) { - currentItem->attached->setIsCurrentItem(false); - releaseItem(currentItem); - currentItem = 0; - currentIndex = modelIndex; - emit q->currentIndexChanged(); - updateHighlight(); - } else if (currentIndex != modelIndex) { - currentIndex = modelIndex; - emit q->currentIndexChanged(); - } - return; - } - - if (currentItem && currentIndex == modelIndex) { - updateHighlight(); - return; - } - FxListItem1 *oldCurrentItem = currentItem; - currentIndex = modelIndex; - currentItem = createItem(modelIndex); - if (oldCurrentItem && (!currentItem || oldCurrentItem->item != currentItem->item)) - oldCurrentItem->attached->setIsCurrentItem(false); - if (currentItem) { - if (modelIndex == visibleIndex - 1 && visibleItems.count()) { - // We can calculate exact postion in this case - currentItem->setPosition(visibleItems.first()->position() - currentItem->size() - spacing); - } else { - // Create current item now and position as best we can. - // Its position will be corrected when it becomes visible. - currentItem->setPosition(positionAt(modelIndex)); - } - currentItem->item->setFocus(true); - currentItem->attached->setIsCurrentItem(true); - // Avoid showing section delegate twice. We still need the section heading so that - // currentItem positioning works correctly. - // This is slightly sub-optimal, but section heading caching minimizes the impact. - if (currentItem->section) - currentItem->section->setVisible(false); - if (visibleItems.isEmpty()) - averageSize = currentItem->size(); - } - updateHighlight(); - emit q->currentIndexChanged(); - // Release the old current item - releaseItem(oldCurrentItem); -} - -void QDeclarative1ListViewPrivate::updateAverage() -{ - if (!visibleItems.count()) - return; - qreal sum = 0.0; - for (int i = 0; i < visibleItems.count(); ++i) - sum += visibleItems.at(i)->size(); - averageSize = qRound(sum / visibleItems.count()); -} - -void QDeclarative1ListViewPrivate::updateFooter() -{ - Q_Q(QDeclarative1ListView); - if (!footer && footerComponent) { - QDeclarativeItem *item = 0; - QDeclarativeContext *context = new QDeclarativeContext(qmlContext(q)); - QObject *nobj = footerComponent->create(context); - if (nobj) { - QDeclarative_setParent_noEvent(context, nobj); - item = qobject_cast<QDeclarativeItem *>(nobj); - if (!item) - delete nobj; - } else { - delete context; - } - if (item) { - QDeclarative_setParent_noEvent(item, q->contentItem()); - item->setParentItem(q->contentItem()); - item->setZValue(1); - QDeclarativeItemPrivate *itemPrivate = static_cast<QDeclarativeItemPrivate*>(QGraphicsItemPrivate::get(item)); - itemPrivate->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry); - footer = new FxListItem1(item, q); - } - } - if (footer) { - if (visibleItems.count()) { - qreal endPos = lastPosition() + 1; - if (lastVisibleIndex() == model->count()-1) { - footer->setPosition(endPos); - } else { - qreal visiblePos = position() + q->height(); - if (endPos <= visiblePos || footer->position() < endPos) - footer->setPosition(endPos); - } - } else { - footer->setPosition(visiblePos); - } - } -} - -void QDeclarative1ListViewPrivate::updateHeader() -{ - Q_Q(QDeclarative1ListView); - if (!header && headerComponent) { - QDeclarativeItem *item = 0; - QDeclarativeContext *context = new QDeclarativeContext(qmlContext(q)); - QObject *nobj = headerComponent->create(context); - if (nobj) { - QDeclarative_setParent_noEvent(context, nobj); - item = qobject_cast<QDeclarativeItem *>(nobj); - if (!item) - delete nobj; - } else { - delete context; - } - if (item) { - QDeclarative_setParent_noEvent(item, q->contentItem()); - item->setParentItem(q->contentItem()); - item->setZValue(1); - QDeclarativeItemPrivate *itemPrivate = static_cast<QDeclarativeItemPrivate*>(QGraphicsItemPrivate::get(item)); - itemPrivate->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry); - header = new FxListItem1(item, q); - } - } - if (header) { - if (visibleItems.count()) { - qreal startPos = originPosition(); - if (visibleIndex == 0) { - header->setPosition(startPos - header->size()); - } else { - if (position() <= startPos || header->position() > startPos - header->size()) - header->setPosition(startPos - header->size()); - } - } else { - visiblePos = header->size(); - header->setPosition(0); - } - } -} - -void QDeclarative1ListViewPrivate::fixupPosition() -{ - if ((haveHighlightRange && highlightRange == QDeclarative1ListView::StrictlyEnforceRange) - || snapMode != QDeclarative1ListView::NoSnap) - moveReason = Other; - if (orient == QDeclarative1ListView::Vertical) - fixupY(); - else - fixupX(); -} - -void QDeclarative1ListViewPrivate::fixup(AxisData &data, qreal minExtent, qreal maxExtent) -{ - if ((orient == QDeclarative1ListView::Horizontal && &data == &vData) - || (orient == QDeclarative1ListView::Vertical && &data == &hData)) - return; - - correctFlick = false; - fixupMode = moveReason == Mouse ? fixupMode : Immediate; - bool strictHighlightRange = haveHighlightRange && highlightRange == QDeclarative1ListView::StrictlyEnforceRange; - - qreal highlightStart; - qreal highlightEnd; - qreal viewPos; - if (isRightToLeft()) { - // Handle Right-To-Left exceptions - viewPos = -position()-size(); - highlightStart = highlightRangeStartValid ? size() - highlightRangeEnd : highlightRangeStart; - highlightEnd = highlightRangeEndValid ? size() - highlightRangeStart : highlightRangeEnd; - } else { - viewPos = position(); - highlightStart = highlightRangeStart; - highlightEnd = highlightRangeEnd; - } - - if (snapMode != QDeclarative1ListView::NoSnap && moveReason != QDeclarative1ListViewPrivate::SetIndex) { - qreal tempPosition = isRightToLeft() ? -position()-size() : position(); - if (snapMode == QDeclarative1ListView::SnapOneItem && moveReason == Mouse) { - // if we've been dragged < averageSize/2 then bias towards the next item - qreal dist = data.move.value() - (data.pressPos - data.dragStartOffset); - qreal bias = 0; - if (data.velocity > 0 && dist > QML_FLICK_SNAPONETHRESHOLD && dist < averageSize/2) - bias = averageSize/2; - else if (data.velocity < 0 && dist < -QML_FLICK_SNAPONETHRESHOLD && dist > -averageSize/2) - bias = -averageSize/2; - if (isRightToLeft()) - bias = -bias; - tempPosition -= bias; - } - FxListItem1 *topItem = snapItemAt(tempPosition+highlightStart); - if (!topItem && strictHighlightRange && currentItem) { - // StrictlyEnforceRange always keeps an item in range - updateHighlight(); - topItem = currentItem; - } - FxListItem1 *bottomItem = snapItemAt(tempPosition+highlightEnd); - if (!bottomItem && strictHighlightRange && currentItem) { - // StrictlyEnforceRange always keeps an item in range - updateHighlight(); - bottomItem = currentItem; - } - qreal pos; - bool isInBounds = -position() > maxExtent && -position() <= minExtent; - if (topItem && (isInBounds || strictHighlightRange)) { - if (topItem->index == 0 && header && tempPosition+highlightStart < header->position()+header->size()/2 && !strictHighlightRange) { - pos = isRightToLeft() ? - header->position() + highlightStart - size() : header->position() - highlightStart; - } else { - if (isRightToLeft()) - pos = qMax(qMin(-topItem->position() + highlightStart - size(), -maxExtent), -minExtent); - else - pos = qMax(qMin(topItem->position() - highlightStart, -maxExtent), -minExtent); - } - } else if (bottomItem && isInBounds) { - if (isRightToLeft()) - pos = qMax(qMin(-bottomItem->position() + highlightEnd - size(), -maxExtent), -minExtent); - else - pos = qMax(qMin(bottomItem->position() - highlightEnd, -maxExtent), -minExtent); - } else { - QDeclarative1FlickablePrivate::fixup(data, minExtent, maxExtent); - return; - } - - qreal dist = qAbs(data.move + pos); - if (dist > 0) { - timeline.reset(data.move); - if (fixupMode != Immediate) { - timeline.move(data.move, -pos, QEasingCurve(QEasingCurve::InOutQuad), fixupDuration/2); - data.fixingUp = true; - } else { - timeline.set(data.move, -pos); - } - vTime = timeline.time(); - } - } else if (currentItem && strictHighlightRange - && moveReason != QDeclarative1ListViewPrivate::SetIndex) { - updateHighlight(); - qreal pos = currentItem->itemPosition(); - if (viewPos < pos + currentItem->itemSize() - highlightEnd) - viewPos = pos + currentItem->itemSize() - highlightEnd; - if (viewPos > pos - highlightStart) - viewPos = pos - highlightStart; - if (isRightToLeft()) - viewPos = -viewPos-size(); - - timeline.reset(data.move); - if (viewPos != position()) { - if (fixupMode != Immediate) { - timeline.move(data.move, -viewPos, QEasingCurve(QEasingCurve::InOutQuad), fixupDuration/2); - data.fixingUp = true; - } else { - timeline.set(data.move, -viewPos); - } - } - vTime = timeline.time(); - } else { - QDeclarative1FlickablePrivate::fixup(data, minExtent, maxExtent); - } - data.inOvershoot = false; - fixupMode = Normal; -} - -void QDeclarative1ListViewPrivate::flick(AxisData &data, qreal minExtent, qreal maxExtent, qreal vSize, - QDeclarative1TimeLineCallback::Callback fixupCallback, qreal velocity) -{ - Q_Q(QDeclarative1ListView); - - data.fixingUp = false; - moveReason = Mouse; - if ((!haveHighlightRange || highlightRange != QDeclarative1ListView::StrictlyEnforceRange) && snapMode == QDeclarative1ListView::NoSnap) { - correctFlick = true; - QDeclarative1FlickablePrivate::flick(data, minExtent, maxExtent, vSize, fixupCallback, velocity); - return; - } - qreal maxDistance = 0; - qreal dataValue = isRightToLeft() ? -data.move.value()+size() : data.move.value(); - qreal highlightStart = isRightToLeft() && highlightRangeStartValid ? size()-highlightRangeEnd : highlightRangeStart; - // -ve velocity means list is moving up/left - if (velocity > 0) { - if (data.move.value() < minExtent) { - if (snapMode == QDeclarative1ListView::SnapOneItem && !hData.flicking && !vData.flicking) { - // if we've been dragged < averageSize/2 then bias towards the next item - qreal dist = data.move.value() - (data.pressPos - data.dragStartOffset); - qreal bias = dist < averageSize/2 ? averageSize/2 : 0; - if (isRightToLeft()) - bias = -bias; - data.flickTarget = -snapPosAt(-(dataValue - highlightStart) - bias) + highlightStart; - maxDistance = qAbs(data.flickTarget - data.move.value()); - velocity = maxVelocity; - } else { - maxDistance = qAbs(minExtent - data.move.value()); - } - } - if (snapMode == QDeclarative1ListView::NoSnap && highlightRange != QDeclarative1ListView::StrictlyEnforceRange) - data.flickTarget = minExtent; - } else { - if (data.move.value() > maxExtent) { - if (snapMode == QDeclarative1ListView::SnapOneItem && !hData.flicking && !vData.flicking) { - // if we've been dragged < averageSize/2 then bias towards the next item - qreal dist = data.move.value() - (data.pressPos - data.dragStartOffset); - qreal bias = -dist < averageSize/2 ? averageSize/2 : 0; - if (isRightToLeft()) - bias = -bias; - data.flickTarget = -snapPosAt(-(dataValue - highlightStart) + bias) + highlightStart; - maxDistance = qAbs(data.flickTarget - data.move.value()); - velocity = -maxVelocity; - } else { - maxDistance = qAbs(maxExtent - data.move.value()); - } - } - if (snapMode == QDeclarative1ListView::NoSnap && highlightRange != QDeclarative1ListView::StrictlyEnforceRange) - data.flickTarget = maxExtent; - } - - bool overShoot = boundsBehavior == QDeclarative1Flickable::DragAndOvershootBounds; - - if (maxDistance > 0 || overShoot) { - // These modes require the list to stop exactly on an item boundary. - // The initial flick will estimate the boundary to stop on. - // Since list items can have variable sizes, the boundary will be - // reevaluated and adjusted as we approach the boundary. - qreal v = velocity; - if (maxVelocity != -1 && maxVelocity < qAbs(v)) { - if (v < 0) - v = -maxVelocity; - else - v = maxVelocity; - } - if (!hData.flicking && !vData.flicking) { - // the initial flick - estimate boundary - qreal accel = deceleration; - qreal v2 = v * v; - overshootDist = 0.0; - // + averageSize/4 to encourage moving at least one item in the flick direction - qreal dist = v2 / (accel * 2.0) + averageSize/4; - if (maxDistance > 0) - dist = qMin(dist, maxDistance); - if (v > 0) - dist = -dist; - if ((maxDistance > 0.0 && v2 / (2.0f * maxDistance) < accel) || snapMode == QDeclarative1ListView::SnapOneItem) { - if (snapMode != QDeclarative1ListView::SnapOneItem) { - qreal distTemp = isRightToLeft() ? -dist : dist; - data.flickTarget = -snapPosAt(-(dataValue - highlightStart) + distTemp) + highlightStart; - } - data.flickTarget = isRightToLeft() ? -data.flickTarget+size() : data.flickTarget; - if (overShoot) { - if (data.flickTarget >= minExtent) { - overshootDist = overShootDistance(vSize); - data.flickTarget += overshootDist; - } else if (data.flickTarget <= maxExtent) { - overshootDist = overShootDistance(vSize); - data.flickTarget -= overshootDist; - } - } - qreal adjDist = -data.flickTarget + data.move.value(); - if (qAbs(adjDist) > qAbs(dist)) { - // Prevent painfully slow flicking - adjust velocity to suit flickDeceleration - qreal adjv2 = accel * 2.0f * qAbs(adjDist); - if (adjv2 > v2) { - v2 = adjv2; - v = qSqrt(v2); - if (dist > 0) - v = -v; - } - } - dist = adjDist; - accel = v2 / (2.0f * qAbs(dist)); - } else if (overShoot) { - data.flickTarget = data.move.value() - dist; - if (data.flickTarget >= minExtent) { - overshootDist = overShootDistance(vSize); - data.flickTarget += overshootDist; - } else if (data.flickTarget <= maxExtent) { - overshootDist = overShootDistance(vSize); - data.flickTarget -= overshootDist; - } - } - - timeline.reset(data.move); - timeline.accel(data.move, v, accel, maxDistance + overshootDist); - timeline.callback(QDeclarative1TimeLineCallback(&data.move, fixupCallback, this)); - if (!hData.flicking && q->xflick()) { - hData.flicking = true; - emit q->flickingChanged(); - emit q->flickingHorizontallyChanged(); - emit q->flickStarted(); - } - if (!vData.flicking && q->yflick()) { - vData.flicking = true; - emit q->flickingChanged(); - emit q->flickingVerticallyChanged(); - emit q->flickStarted(); - } - correctFlick = true; - } else { - // reevaluate the target boundary. - qreal newtarget = data.flickTarget; - if (snapMode != QDeclarative1ListView::NoSnap || highlightRange == QDeclarative1ListView::StrictlyEnforceRange) { - qreal tempFlickTarget = isRightToLeft() ? -data.flickTarget+size() : data.flickTarget; - newtarget = -snapPosAt(-(tempFlickTarget - highlightStart)) + highlightStart; - newtarget = isRightToLeft() ? -newtarget+size() : newtarget; - } - if (velocity < 0 && newtarget <= maxExtent) - newtarget = maxExtent - overshootDist; - else if (velocity > 0 && newtarget >= minExtent) - newtarget = minExtent + overshootDist; - if (newtarget == data.flickTarget) { // boundary unchanged - nothing to do - if (qAbs(velocity) < MinimumFlickVelocity) - correctFlick = false; - return; - } - data.flickTarget = newtarget; - qreal dist = -newtarget + data.move.value(); - if ((v < 0 && dist < 0) || (v > 0 && dist > 0)) { - correctFlick = false; - timeline.reset(data.move); - fixup(data, minExtent, maxExtent); - return; - } - - timeline.reset(data.move); - timeline.accelDistance(data.move, v, -dist); - timeline.callback(QDeclarative1TimeLineCallback(&data.move, fixupCallback, this)); - } - } else { - correctFlick = false; - timeline.reset(data.move); - fixup(data, minExtent, maxExtent); - } -} - -//---------------------------------------------------------------------------- - -/*! - \qmlclass ListView QDeclarative1ListView - \inqmlmodule QtQuick 1 - \ingroup qml-view-elements - \since QtQuick 1.0 - \inherits Flickable - \brief The ListView item provides a list view of items provided by a model. - - A ListView displays data from models created from built-in QML elements like ListModel - and XmlListModel, or custom model classes defined in C++ that inherit from - QAbstractListModel. - - A ListView has a \l model, which defines the data to be displayed, and - a \l delegate, which defines how the data should be displayed. Items in a - ListView are laid out horizontally or vertically. List views are inherently - flickable because ListView inherits from \l Flickable. - - \section1 Example Usage - - The following example shows the definition of a simple list model defined - in a file called \c ContactModel.qml: - - \snippet doc/src/snippets/qtquick1/listview/ContactModel.qml 0 - - Another component can display this model data in a ListView, like this: - - \snippet doc/src/snippets/qtquick1/listview/listview.qml import - \codeline - \snippet doc/src/snippets/qtquick1/listview/listview.qml classdocs simple - - \image listview-simple.png - - Here, the ListView creates a \c ContactModel component for its model, and a \l Text element - for its delegate. The view will create a new \l Text component for each item in the model. Notice - the delegate is able to access the model's \c name and \c number data directly. - - An improved list view is shown below. The delegate is visually improved and is moved - into a separate \c contactDelegate component. - - \snippet doc/src/snippets/qtquick1/listview/listview.qml classdocs advanced - \image listview-highlight.png - - The currently selected item is highlighted with a blue \l Rectangle using the \l highlight property, - and \c focus is set to \c true to enable keyboard navigation for the list view. - The list view itself is a focus scope (see \l{qmlfocus#Acquiring Focus and Focus Scopes}{the focus documentation page} for more details). - - Delegates are instantiated as needed and may be destroyed at any time. - State should \e never be stored in a delegate. - - ListView attaches a number of properties to the root item of the delegate, for example - \c {ListView.isCurrentItem}. In the following example, the root delegate item can access - this attached property directly as \c ListView.isCurrentItem, while the child - \c contactInfo object must refer to this property as \c wrapper.ListView.isCurrentItem. - - \snippet doc/src/snippets/qtquick1/listview/listview.qml isCurrentItem - - \note Views do not enable \e clip automatically. If the view - is not clipped by another item or the screen, it will be necessary - to set \e {clip: true} in order to have the out of view items clipped - nicely. - - \sa {QML Data Models}, GridView, {declarative/modelviews/listview}{ListView examples} -*/ - -QDeclarative1ListView::QDeclarative1ListView(QDeclarativeItem *parent) - : QDeclarative1Flickable(*(new QDeclarative1ListViewPrivate), parent) -{ - Q_D(QDeclarative1ListView); - d->init(); -} - -QDeclarative1ListView::~QDeclarative1ListView() -{ - Q_D(QDeclarative1ListView); - d->clear(); - if (d->ownModel) - delete d->model; - delete d->header; - delete d->footer; -} - -/*! - \qmlattachedproperty bool ListView::isCurrentItem - This attached property is true if this delegate is the current item; otherwise false. - - It is attached to each instance of the delegate. - - This property may be used to adjust the appearance of the current item, for example: - - \snippet doc/src/snippets/qtquick1/listview/listview.qml isCurrentItem -*/ - -/*! - \qmlattachedproperty ListView ListView::view - This attached property holds the view that manages this delegate instance. - - It is attached to each instance of the delegate. -*/ - -/*! - \qmlattachedproperty string ListView::previousSection - This attached property holds the section of the previous element. - - It is attached to each instance of the delegate. - - The section is evaluated using the \l {ListView::section.property}{section} properties. -*/ - -/*! - \qmlattachedproperty string ListView::nextSection - This attached property holds the section of the next element. - - It is attached to each instance of the delegate. - - The section is evaluated using the \l {ListView::section.property}{section} properties. -*/ - -/*! - \qmlattachedproperty string ListView::section - This attached property holds the section of this element. - - It is attached to each instance of the delegate. - - The section is evaluated using the \l {ListView::section.property}{section} properties. -*/ - -/*! - \qmlattachedproperty bool ListView::delayRemove - This attached property holds whether the delegate may be destroyed. - - It is attached to each instance of the delegate. - - It is sometimes necessary to delay the destruction of an item - until an animation completes. - - The example delegate below ensures that the animation completes before - the item is removed from the list. - - \snippet doc/src/snippets/qtquick1/listview/listview.qml delayRemove -*/ - -/*! - \qmlattachedsignal QtQuick1::ListView::onAdd() - This attached handler is called immediately after an item is added to the view. -*/ - -/*! - \qmlattachedsignal QtQuick1::ListView::onRemove() - This attached handler is called immediately before an item is removed from the view. -*/ - -/*! - \qmlproperty model QtQuick1::ListView::model - This property holds the model providing data for the list. - - The model provides the set of data that is used to create the items - in the view. Models can be created directly in QML using \l ListModel, \l XmlListModel - or \l VisualItemModel, or provided by C++ model classes. If a C++ model class is - used, it must be a subclass of \l QAbstractItemModel or a simple list. - - \sa {qmlmodels}{Data Models} -*/ -QVariant QDeclarative1ListView::model() const -{ - Q_D(const QDeclarative1ListView); - return d->modelVariant; -} - -void QDeclarative1ListView::setModel(const QVariant &model) -{ - Q_D(QDeclarative1ListView); - if (d->modelVariant == model) - return; - if (d->model) { - disconnect(d->model, SIGNAL(itemsInserted(int,int)), this, SLOT(itemsInserted(int,int))); - disconnect(d->model, SIGNAL(itemsRemoved(int,int)), this, SLOT(itemsRemoved(int,int))); - disconnect(d->model, SIGNAL(itemsMoved(int,int,int)), this, SLOT(itemsMoved(int,int,int))); - disconnect(d->model, SIGNAL(itemsChanged(int,int)), this, SLOT(itemsChanged(int,int))); - disconnect(d->model, SIGNAL(modelReset()), this, SLOT(modelReset())); - disconnect(d->model, SIGNAL(createdItem(int,QDeclarativeItem*)), this, SLOT(createdItem(int,QDeclarativeItem*))); - disconnect(d->model, SIGNAL(destroyingItem(QDeclarativeItem*)), this, SLOT(destroyingItem(QDeclarativeItem*))); - } - d->clear(); - QDeclarative1VisualModel *oldModel = d->model; - d->model = 0; - d->setPosition(0); - d->modelVariant = model; - QObject *object = qvariant_cast<QObject*>(model); - QDeclarative1VisualModel *vim = 0; - if (object && (vim = qobject_cast<QDeclarative1VisualModel *>(object))) { - if (d->ownModel) { - delete oldModel; - d->ownModel = false; - } - d->model = vim; - } else { - if (!d->ownModel) { - d->model = new QDeclarative1VisualDataModel(qmlContext(this), this); - d->ownModel = true; - } else { - d->model = oldModel; - } - if (QDeclarative1VisualDataModel *dataModel = qobject_cast<QDeclarative1VisualDataModel*>(d->model)) - dataModel->setModel(model); - } - if (d->model) { - d->bufferMode = QDeclarative1ListViewPrivate::BufferBefore | QDeclarative1ListViewPrivate::BufferAfter; - if (isComponentComplete()) { - updateSections(); - refill(); - if ((d->currentIndex >= d->model->count() || d->currentIndex < 0) && !d->currentIndexCleared) { - setCurrentIndex(0); - } else { - d->moveReason = QDeclarative1ListViewPrivate::SetIndex; - d->updateCurrent(d->currentIndex); - if (d->highlight && d->currentItem) { - if (d->autoHighlight) - d->highlight->setPosition(d->currentItem->position()); - d->updateTrackedItem(); - } - } - d->updateViewport(); - } - connect(d->model, SIGNAL(itemsInserted(int,int)), this, SLOT(itemsInserted(int,int))); - connect(d->model, SIGNAL(itemsRemoved(int,int)), this, SLOT(itemsRemoved(int,int))); - connect(d->model, SIGNAL(itemsMoved(int,int,int)), this, SLOT(itemsMoved(int,int,int))); - connect(d->model, SIGNAL(itemsChanged(int,int)), this, SLOT(itemsChanged(int,int))); - connect(d->model, SIGNAL(modelReset()), this, SLOT(modelReset())); - connect(d->model, SIGNAL(createdItem(int,QDeclarativeItem*)), this, SLOT(createdItem(int,QDeclarativeItem*))); - connect(d->model, SIGNAL(destroyingItem(QDeclarativeItem*)), this, SLOT(destroyingItem(QDeclarativeItem*))); - emit countChanged(); - } - emit modelChanged(); -} - -/*! - \qmlproperty Component QtQuick1::ListView::delegate - - The delegate provides a template defining each item instantiated by the view. - The index is exposed as an accessible \c index property. Properties of the - model are also available depending upon the type of \l {qmlmodels}{Data Model}. - - The number of elements in the delegate has a direct effect on the - flicking performance of the view. If at all possible, place functionality - that is not needed for the normal display of the delegate in a \l Loader which - can load additional elements when needed. - - The ListView will lay out the items based on the size of the root item - in the delegate. - - It is recommended that the delagate's size be a whole number to avoid sub-pixel - alignment of items. - - \note Delegates are instantiated as needed and may be destroyed at any time. - State should \e never be stored in a delegate. -*/ -QDeclarativeComponent *QDeclarative1ListView::delegate() const -{ - Q_D(const QDeclarative1ListView); - if (d->model) { - if (QDeclarative1VisualDataModel *dataModel = qobject_cast<QDeclarative1VisualDataModel*>(d->model)) - return dataModel->delegate(); - } - - return 0; -} - -void QDeclarative1ListView::setDelegate(QDeclarativeComponent *delegate) -{ - Q_D(QDeclarative1ListView); - if (delegate == this->delegate()) - return; - if (!d->ownModel) { - d->model = new QDeclarative1VisualDataModel(qmlContext(this)); - d->ownModel = true; - } - if (QDeclarative1VisualDataModel *dataModel = qobject_cast<QDeclarative1VisualDataModel*>(d->model)) { - int oldCount = dataModel->count(); - dataModel->setDelegate(delegate); - if (isComponentComplete()) { - for (int i = 0; i < d->visibleItems.count(); ++i) - d->releaseItem(d->visibleItems.at(i)); - d->visibleItems.clear(); - d->releaseItem(d->currentItem); - d->currentItem = 0; - updateSections(); - refill(); - d->moveReason = QDeclarative1ListViewPrivate::SetIndex; - d->updateCurrent(d->currentIndex); - if (d->highlight && d->currentItem) { - if (d->autoHighlight) - d->highlight->setPosition(d->currentItem->position()); - d->updateTrackedItem(); - } - d->updateViewport(); - } - if (oldCount != dataModel->count()) - emit countChanged(); - } - emit delegateChanged(); -} - -/*! - \qmlproperty int QtQuick1::ListView::currentIndex - \qmlproperty Item QtQuick1::ListView::currentItem - - The \c currentIndex property holds the index of the current item, and - \c currentItem holds the current item. Setting the currentIndex to -1 - will clear the highlight and set currentItem to null. - - If highlightFollowsCurrentItem is \c true, setting either of these - properties will smoothly scroll the ListView so that the current - item becomes visible. - - Note that the position of the current item - may only be approximate until it becomes visible in the view. -*/ -int QDeclarative1ListView::currentIndex() const -{ - Q_D(const QDeclarative1ListView); - return d->currentIndex; -} - -void QDeclarative1ListView::setCurrentIndex(int index) -{ - Q_D(QDeclarative1ListView); - if (d->requestedIndex >= 0) // currently creating item - return; - d->currentIndexCleared = (index == -1); - if (index == d->currentIndex) - return; - if (isComponentComplete() && d->isValid()) { - if (d->layoutScheduled) - d->layout(); - d->moveReason = QDeclarative1ListViewPrivate::SetIndex; - d->updateCurrent(index); - } else if (d->currentIndex != index) { - d->currentIndex = index; - emit currentIndexChanged(); - } -} - -QDeclarativeItem *QDeclarative1ListView::currentItem() -{ - Q_D(QDeclarative1ListView); - if (!d->currentItem) - return 0; - return d->currentItem->item; -} - -/*! - \qmlproperty Item QtQuick1::ListView::highlightItem - - This holds the highlight item created from the \l highlight component. - - The \c highlightItem is managed by the view unless - \l highlightFollowsCurrentItem is set to false. - - \sa highlight, highlightFollowsCurrentItem -*/ -QDeclarativeItem *QDeclarative1ListView::highlightItem() -{ - Q_D(QDeclarative1ListView); - if (!d->highlight) - return 0; - return d->highlight->item; -} - -/*! - \qmlproperty int QtQuick1::ListView::count - This property holds the number of items in the view. -*/ -int QDeclarative1ListView::count() const -{ - Q_D(const QDeclarative1ListView); - if (d->model) - return d->model->count(); - return 0; -} - -/*! - \qmlproperty Component QtQuick1::ListView::highlight - This property holds the component to use as the highlight. - - An instance of the highlight component is created for each list. - The geometry of the resulting component instance is managed by the list - so as to stay with the current item, unless the highlightFollowsCurrentItem - property is false. - - \sa highlightItem, highlightFollowsCurrentItem, {declarative/modelviews/listview}{ListView examples} -*/ -QDeclarativeComponent *QDeclarative1ListView::highlight() const -{ - Q_D(const QDeclarative1ListView); - return d->highlightComponent; -} - -void QDeclarative1ListView::setHighlight(QDeclarativeComponent *highlight) -{ - Q_D(QDeclarative1ListView); - if (highlight != d->highlightComponent) { - d->highlightComponent = highlight; - d->createHighlight(); - if (d->currentItem) - d->updateHighlight(); - emit highlightChanged(); - } -} - -/*! - \qmlproperty bool QtQuick1::ListView::highlightFollowsCurrentItem - This property holds whether the highlight is managed by the view. - - If this property is true (the default value), the highlight is moved smoothly - to follow the current item. Otherwise, the - highlight is not moved by the view, and any movement must be implemented - by the highlight. - - Here is a highlight with its motion defined by a \l {SpringAnimation} item: - - \snippet doc/src/snippets/qtquick1/listview/listview.qml highlightFollowsCurrentItem - - Note that the highlight animation also affects the way that the view - is scrolled. This is because the view moves to maintain the - highlight within the preferred highlight range (or visible viewport). - - \sa highlight, highlightMoveSpeed -*/ -bool QDeclarative1ListView::highlightFollowsCurrentItem() const -{ - Q_D(const QDeclarative1ListView); - return d->autoHighlight; -} - -void QDeclarative1ListView::setHighlightFollowsCurrentItem(bool autoHighlight) -{ - Q_D(QDeclarative1ListView); - if (d->autoHighlight != autoHighlight) { - d->autoHighlight = autoHighlight; - if (autoHighlight) { - d->updateHighlight(); - } else { - if (d->highlightPosAnimator) - d->highlightPosAnimator->stop(); - if (d->highlightSizeAnimator) - d->highlightSizeAnimator->stop(); - } - emit highlightFollowsCurrentItemChanged(); - } -} - -//###Possibly rename these properties, since they are very useful even without a highlight? -/*! - \qmlproperty real QtQuick1::ListView::preferredHighlightBegin - \qmlproperty real QtQuick1::ListView::preferredHighlightEnd - \qmlproperty enumeration QtQuick1::ListView::highlightRangeMode - - These properties define the preferred range of the highlight (for the current item) - within the view. The \c preferredHighlightBegin value must be less than the - \c preferredHighlightEnd value. - - These properties affect the position of the current item when the list is scrolled. - For example, if the currently selected item should stay in the middle of the - list when the view is scrolled, set the \c preferredHighlightBegin and - \c preferredHighlightEnd values to the top and bottom coordinates of where the middle - item would be. If the \c currentItem is changed programmatically, the list will - automatically scroll so that the current item is in the middle of the view. - Furthermore, the behavior of the current item index will occur whether or not a - highlight exists. - - Valid values for \c highlightRangeMode are: - - \list - \o ListView.ApplyRange - the view attempts to maintain the highlight within the range. - However, the highlight can move outside of the range at the ends of the list or due - to mouse interaction. - \o ListView.StrictlyEnforceRange - the highlight never moves outside of the range. - The current item changes if a keyboard or mouse action would cause the highlight to move - outside of the range. - \o ListView.NoHighlightRange - this is the default value. - \endlist -*/ -qreal QDeclarative1ListView::preferredHighlightBegin() const -{ - Q_D(const QDeclarative1ListView); - return d->highlightRangeStart; -} - -void QDeclarative1ListView::setPreferredHighlightBegin(qreal start) -{ - Q_D(QDeclarative1ListView); - d->highlightRangeStartValid = true; - if (d->highlightRangeStart == start) - return; - d->highlightRangeStart = start; - d->haveHighlightRange = d->highlightRange != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; - emit preferredHighlightBeginChanged(); -} - -void QDeclarative1ListView::resetPreferredHighlightBegin() -{ - Q_D(QDeclarative1ListView); - d->highlightRangeStartValid = false; - if (d->highlightRangeStart == 0) - return; - d->highlightRangeStart = 0; - emit preferredHighlightBeginChanged(); -} - -qreal QDeclarative1ListView::preferredHighlightEnd() const -{ - Q_D(const QDeclarative1ListView); - return d->highlightRangeEnd; -} - -void QDeclarative1ListView::setPreferredHighlightEnd(qreal end) -{ - Q_D(QDeclarative1ListView); - d->highlightRangeEndValid = true; - if (d->highlightRangeEnd == end) - return; - d->highlightRangeEnd = end; - d->haveHighlightRange = d->highlightRange != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; - emit preferredHighlightEndChanged(); -} - -void QDeclarative1ListView::resetPreferredHighlightEnd() -{ - Q_D(QDeclarative1ListView); - d->highlightRangeEndValid = false; - if (d->highlightRangeEnd == 0) - return; - d->highlightRangeEnd = 0; - emit preferredHighlightEndChanged(); -} - -QDeclarative1ListView::HighlightRangeMode QDeclarative1ListView::highlightRangeMode() const -{ - Q_D(const QDeclarative1ListView); - return d->highlightRange; -} - -void QDeclarative1ListView::setHighlightRangeMode(HighlightRangeMode mode) -{ - Q_D(QDeclarative1ListView); - if (d->highlightRange == mode) - return; - d->highlightRange = mode; - d->haveHighlightRange = d->highlightRange != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; - emit highlightRangeModeChanged(); -} - -/*! - \qmlproperty real QtQuick1::ListView::spacing - - This property holds the spacing between items. - - The default value is 0. -*/ -qreal QDeclarative1ListView::spacing() const -{ - Q_D(const QDeclarative1ListView); - return d->spacing; -} - -void QDeclarative1ListView::setSpacing(qreal spacing) -{ - Q_D(QDeclarative1ListView); - if (spacing != d->spacing) { - d->spacing = spacing; - d->layout(); - emit spacingChanged(); - } -} - -/*! - \qmlproperty enumeration QtQuick1::ListView::orientation - This property holds the orientation of the list. - - Possible values: - - \list - \o ListView.Horizontal - Items are laid out horizontally - \o ListView.Vertical (default) - Items are laid out vertically - \endlist - - \table - \row - \o Horizontal orientation: - \image ListViewHorizontal.png - - \row - \o Vertical orientation: - \image listview-highlight.png - \endtable -*/ -QDeclarative1ListView::Orientation QDeclarative1ListView::orientation() const -{ - Q_D(const QDeclarative1ListView); - return d->orient; -} - -void QDeclarative1ListView::setOrientation(QDeclarative1ListView::Orientation orientation) -{ - Q_D(QDeclarative1ListView); - if (d->orient != orientation) { - d->orient = orientation; - if (d->orient == QDeclarative1ListView::Vertical) { - setContentWidth(-1); - setFlickableDirection(VerticalFlick); - setContentX(0); - } else { - setContentHeight(-1); - setFlickableDirection(HorizontalFlick); - setContentY(0); - } - d->regenerate(); - emit orientationChanged(); - } -} - -/*! - \qmlproperty enumeration QtQuick1::ListView::layoutDirection - This property holds the layout direction of the horizontal list. - - Possible values: - - \list - \o Qt.LeftToRight (default) - Items will be laid out from left to right. - \o Qt.RightToLeft - Items will be laid out from right to let. - \endlist - - \sa ListView::effectiveLayoutDirection -*/ - -Qt::LayoutDirection QDeclarative1ListView::layoutDirection() const -{ - Q_D(const QDeclarative1ListView); - return d->layoutDirection; -} - -void QDeclarative1ListView::setLayoutDirection(Qt::LayoutDirection layoutDirection) -{ - Q_D(QDeclarative1ListView); - if (d->layoutDirection != layoutDirection) { - d->layoutDirection = layoutDirection; - d->regenerate(); - emit layoutDirectionChanged(); - emit effectiveLayoutDirectionChanged(); - } -} - -/*! - \qmlproperty enumeration QtQuick1::ListView::effectiveLayoutDirection - This property holds the effective layout direction of the horizontal list. - - When using the attached property \l {LayoutMirroring::enabled}{LayoutMirroring::enabled} for locale layouts, - the visual layout direction of the horizontal list will be mirrored. However, the - property \l {ListView::layoutDirection}{layoutDirection} will remain unchanged. - - \sa ListView::layoutDirection, {LayoutMirroring}{LayoutMirroring} -*/ - -Qt::LayoutDirection QDeclarative1ListView::effectiveLayoutDirection() const -{ - Q_D(const QDeclarative1ListView); - if (d->effectiveLayoutMirror) - return d->layoutDirection == Qt::RightToLeft ? Qt::LeftToRight : Qt::RightToLeft; - else - return d->layoutDirection; -} - -/*! - \qmlproperty bool QtQuick1::ListView::keyNavigationWraps - This property holds whether the list wraps key navigation. - - If this is true, key navigation that would move the current item selection - past the end of the list instead wraps around and moves the selection to - the start of the list, and vice-versa. - - By default, key navigation is not wrapped. -*/ -bool QDeclarative1ListView::isWrapEnabled() const -{ - Q_D(const QDeclarative1ListView); - return d->wrap; -} - -void QDeclarative1ListView::setWrapEnabled(bool wrap) -{ - Q_D(QDeclarative1ListView); - if (d->wrap == wrap) - return; - d->wrap = wrap; - emit keyNavigationWrapsChanged(); -} - -/*! - \qmlproperty int QtQuick1::ListView::cacheBuffer - This property determines whether delegates are retained outside the - visible area of the view. - - If this value is non-zero, the view keeps as many delegates - instantiated as it can fit within the buffer specified. For example, - if in a vertical view the delegate is 20 pixels high and \c cacheBuffer is - set to 40, then up to 2 delegates above and 2 delegates below the visible - area may be retained. - - Note that cacheBuffer is not a pixel buffer - it only maintains additional - instantiated delegates. - - Setting this value can improve the smoothness of scrolling behavior at the expense - of additional memory usage. It is not a substitute for creating efficient - delegates; the fewer elements in a delegate, the faster a view can be - scrolled. -*/ -int QDeclarative1ListView::cacheBuffer() const -{ - Q_D(const QDeclarative1ListView); - return d->buffer; -} - -void QDeclarative1ListView::setCacheBuffer(int b) -{ - Q_D(QDeclarative1ListView); - if (d->buffer != b) { - d->buffer = b; - if (isComponentComplete()) { - d->bufferMode = QDeclarative1ListViewPrivate::BufferBefore | QDeclarative1ListViewPrivate::BufferAfter; - refill(); - } - emit cacheBufferChanged(); - } -} - -/*! - \qmlproperty string QtQuick1::ListView::section.property - \qmlproperty enumeration QtQuick1::ListView::section.criteria - \qmlproperty Component QtQuick1::ListView::section.delegate - - These properties hold the expression to be evaluated for the \l section attached property. - - The \l section attached property enables a ListView to be visually - separated into different parts. These properties determine how sections - are created. - - \c section.property holds the name of the property that is the basis - of each section. - - \c section.criteria holds the criteria for forming each section based on - \c section.property. This value can be one of: - - \list - \o ViewSection.FullString (default) - sections are created based on the - \c section.property value. - \o ViewSection.FirstCharacter - sections are created based on the first - character of the \c section.property value (for example, 'A', 'B', 'C' - sections, etc. for an address book) - \endlist - - \c section.delegate holds the delegate component for each section. - - Each item in the list has attached properties named \c ListView.section, - \c ListView.previousSection and \c ListView.nextSection. These may be - used to place a section header for related items. - - For example, here is a ListView that displays a list of animals, separated - into sections. Each item in the ListView is placed in a different section - depending on the "size" property of the model item. The \c sectionHeading - delegate component provides the light blue bar that marks the beginning of - each section. - - - \snippet examples/declarative/modelviews/listview/sections.qml 0 - - \image qml-listview-sections-example.png - - \note Adding sections to a ListView does not automatically re-order the - list items by the section criteria. - If the model is not ordered by section, then it is possible that - the sections created will not be unique; each boundary between - differing sections will result in a section header being created - even if that section exists elsewhere. - - \sa {declarative/modelviews/listview}{ListView examples} -*/ -QDeclarative1ViewSection *QDeclarative1ListView::sectionCriteria() -{ - Q_D(QDeclarative1ListView); - if (!d->sectionCriteria) { - d->sectionCriteria = new QDeclarative1ViewSection(this); - connect(d->sectionCriteria, SIGNAL(propertyChanged()), this, SLOT(updateSections())); - } - return d->sectionCriteria; -} - -/*! - \qmlproperty string QtQuick1::ListView::currentSection - This property holds the section that is currently at the beginning of the view. -*/ -QString QDeclarative1ListView::currentSection() const -{ - Q_D(const QDeclarative1ListView); - return d->currentSection; -} - -/*! - \qmlproperty real QtQuick1::ListView::highlightMoveSpeed - \qmlproperty int QtQuick1::ListView::highlightMoveDuration - \qmlproperty real QtQuick1::ListView::highlightResizeSpeed - \qmlproperty int QtQuick1::ListView::highlightResizeDuration - - These properties hold the move and resize animation speed of the highlight delegate. - - \l highlightFollowsCurrentItem must be true for these properties - to have effect. - - The default value for the speed properties is 400 pixels/second. - The default value for the duration properties is -1, i.e. the - highlight will take as much time as necessary to move at the set speed. - - These properties have the same characteristics as a SmoothedAnimation. - - \sa highlightFollowsCurrentItem -*/ -qreal QDeclarative1ListView::highlightMoveSpeed() const -{ - Q_D(const QDeclarative1ListView);\ - return d->highlightMoveSpeed; -} - -void QDeclarative1ListView::setHighlightMoveSpeed(qreal speed) -{ - Q_D(QDeclarative1ListView);\ - if (d->highlightMoveSpeed != speed) { - d->highlightMoveSpeed = speed; - if (d->highlightPosAnimator) - d->highlightPosAnimator->velocity = d->highlightMoveSpeed; - emit highlightMoveSpeedChanged(); - } -} - -int QDeclarative1ListView::highlightMoveDuration() const -{ - Q_D(const QDeclarative1ListView); - return d->highlightMoveDuration; -} - -void QDeclarative1ListView::setHighlightMoveDuration(int duration) -{ - Q_D(QDeclarative1ListView);\ - if (d->highlightMoveDuration != duration) { - d->highlightMoveDuration = duration; - if (d->highlightPosAnimator) - d->highlightPosAnimator->userDuration = d->highlightMoveDuration; - emit highlightMoveDurationChanged(); - } -} - -qreal QDeclarative1ListView::highlightResizeSpeed() const -{ - Q_D(const QDeclarative1ListView);\ - return d->highlightResizeSpeed; -} - -void QDeclarative1ListView::setHighlightResizeSpeed(qreal speed) -{ - Q_D(QDeclarative1ListView);\ - if (d->highlightResizeSpeed != speed) { - d->highlightResizeSpeed = speed; - if (d->highlightSizeAnimator) - d->highlightSizeAnimator->velocity = d->highlightResizeSpeed; - emit highlightResizeSpeedChanged(); - } -} - -int QDeclarative1ListView::highlightResizeDuration() const -{ - Q_D(const QDeclarative1ListView); - return d->highlightResizeDuration; -} - -void QDeclarative1ListView::setHighlightResizeDuration(int duration) -{ - Q_D(QDeclarative1ListView);\ - if (d->highlightResizeDuration != duration) { - d->highlightResizeDuration = duration; - if (d->highlightSizeAnimator) - d->highlightSizeAnimator->userDuration = d->highlightResizeDuration; - emit highlightResizeDurationChanged(); - } -} - -/*! - \qmlproperty enumeration QtQuick1::ListView::snapMode - - This property determines how the view scrolling will settle following a drag or flick. - The possible values are: - - \list - \o ListView.NoSnap (default) - the view stops anywhere within the visible area. - \o ListView.SnapToItem - the view settles with an item aligned with the start of - the view. - \o ListView.SnapOneItem - the view settles no more than one item away from the first - visible item at the time the mouse button is released. This mode is particularly - useful for moving one page at a time. - \endlist - - \c snapMode does not affect the \l currentIndex. To update the - \l currentIndex as the list is moved, set \l highlightRangeMode - to \c ListView.StrictlyEnforceRange. - - \sa highlightRangeMode -*/ -QDeclarative1ListView::SnapMode QDeclarative1ListView::snapMode() const -{ - Q_D(const QDeclarative1ListView); - return d->snapMode; -} - -void QDeclarative1ListView::setSnapMode(SnapMode mode) -{ - Q_D(QDeclarative1ListView); - if (d->snapMode != mode) { - d->snapMode = mode; - emit snapModeChanged(); - } -} - -/*! - \qmlproperty Component QtQuick1::ListView::footer - This property holds the component to use as the footer. - - An instance of the footer component is created for each view. The - footer is positioned at the end of the view, after any items. - - \sa header -*/ -QDeclarativeComponent *QDeclarative1ListView::footer() const -{ - Q_D(const QDeclarative1ListView); - return d->footerComponent; -} - -void QDeclarative1ListView::setFooter(QDeclarativeComponent *footer) -{ - Q_D(QDeclarative1ListView); - if (d->footerComponent != footer) { - if (d->footer) { - if (scene()) - scene()->removeItem(d->footer->item); - d->footer->item->deleteLater(); - delete d->footer; - d->footer = 0; - } - d->footerComponent = footer; - d->minExtentDirty = true; - d->maxExtentDirty = true; - if (isComponentComplete()) { - d->updateFooter(); - d->updateViewport(); - d->fixupPosition(); - } - emit footerChanged(); - } -} - -/*! - \qmlproperty Component QtQuick1::ListView::header - This property holds the component to use as the header. - - An instance of the header component is created for each view. The - header is positioned at the beginning of the view, before any items. - - \sa footer -*/ -QDeclarativeComponent *QDeclarative1ListView::header() const -{ - Q_D(const QDeclarative1ListView); - return d->headerComponent; -} - -void QDeclarative1ListView::setHeader(QDeclarativeComponent *header) -{ - Q_D(QDeclarative1ListView); - if (d->headerComponent != header) { - if (d->header) { - if (scene()) - scene()->removeItem(d->header->item); - d->header->item->deleteLater(); - delete d->header; - d->header = 0; - } - d->headerComponent = header; - d->minExtentDirty = true; - d->maxExtentDirty = true; - if (isComponentComplete()) { - d->updateHeader(); - d->updateFooter(); - d->updateViewport(); - d->fixupPosition(); - } - emit headerChanged(); - } -} - -void QDeclarative1ListView::setContentX(qreal pos) -{ - Q_D(QDeclarative1ListView); - // Positioning the view manually should override any current movement state - d->moveReason = QDeclarative1ListViewPrivate::Other; - QDeclarative1Flickable::setContentX(pos); -} - -void QDeclarative1ListView::setContentY(qreal pos) -{ - Q_D(QDeclarative1ListView); - // Positioning the view manually should override any current movement state - d->moveReason = QDeclarative1ListViewPrivate::Other; - QDeclarative1Flickable::setContentY(pos); -} - -bool QDeclarative1ListView::event(QEvent *event) -{ - Q_D(QDeclarative1ListView); - if (event->type() == QEvent::User) { - if (d->layoutScheduled) - d->layout(); - return true; - } - - return QDeclarative1Flickable::event(event); -} - -void QDeclarative1ListView::viewportMoved() -{ - Q_D(QDeclarative1ListView); - QDeclarative1Flickable::viewportMoved(); - if (!d->itemCount) - return; - // Recursion can occur due to refill changing the content size. - if (d->inViewportMoved) - return; - d->inViewportMoved = true; - d->lazyRelease = true; - refill(); - if (d->hData.flicking || d->vData.flicking || d->hData.moving || d->vData.moving) - d->moveReason = QDeclarative1ListViewPrivate::Mouse; - if (d->moveReason != QDeclarative1ListViewPrivate::SetIndex) { - if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange && d->highlight) { - // reposition highlight - qreal pos = d->highlight->position(); - qreal viewPos; - qreal highlightStart; - qreal highlightEnd; - if (d->isRightToLeft()) { - // Handle Right-To-Left exceptions - viewPos = -d->position()-d->size(); - highlightStart = d->highlightRangeStartValid ? d->size()-d->highlightRangeEnd : d->highlightRangeStart; - highlightEnd = d->highlightRangeEndValid ? d->size()-d->highlightRangeStart : d->highlightRangeEnd; - } else { - viewPos = d->position(); - highlightStart = d->highlightRangeStart; - highlightEnd = d->highlightRangeEnd; - } - if (pos > viewPos + highlightEnd - d->highlight->size()) - pos = viewPos + highlightEnd - d->highlight->size(); - if (pos < viewPos + highlightStart) - pos = viewPos + highlightStart; - d->highlightPosAnimator->stop(); - d->highlight->setPosition(qRound(pos)); - - // update current index - if (FxListItem1 *snapItem = d->snapItemAt(d->highlight->position())) { - if (snapItem->index >= 0 && snapItem->index != d->currentIndex) - d->updateCurrent(snapItem->index); - } - } - } - - if ((d->hData.flicking || d->vData.flicking) && d->correctFlick && !d->inFlickCorrection) { - d->inFlickCorrection = true; - // Near an end and it seems that the extent has changed? - // Recalculate the flick so that we don't end up in an odd position. - if (yflick() && !d->vData.inOvershoot) { - if (d->vData.velocity > 0) { - const qreal minY = minYExtent(); - if ((minY - d->vData.move.value() < height()/2 || d->vData.flickTarget - d->vData.move.value() < height()/2) - && minY != d->vData.flickTarget) - d->flickY(-d->vData.smoothVelocity.value()); - d->bufferMode = QDeclarative1ListViewPrivate::BufferBefore; - } else if (d->vData.velocity < 0) { - const qreal maxY = maxYExtent(); - if ((d->vData.move.value() - maxY < height()/2 || d->vData.move.value() - d->vData.flickTarget < height()/2) - && maxY != d->vData.flickTarget) - d->flickY(-d->vData.smoothVelocity.value()); - d->bufferMode = QDeclarative1ListViewPrivate::BufferAfter; - } - } - - if (xflick() && !d->hData.inOvershoot) { - if (d->hData.velocity > 0) { - const qreal minX = minXExtent(); - if ((minX - d->hData.move.value() < width()/2 || d->hData.flickTarget - d->hData.move.value() < width()/2) - && minX != d->hData.flickTarget) - d->flickX(-d->hData.smoothVelocity.value()); - d->bufferMode = d->isRightToLeft() - ? QDeclarative1ListViewPrivate::BufferAfter : QDeclarative1ListViewPrivate::BufferBefore; - } else if (d->hData.velocity < 0) { - const qreal maxX = maxXExtent(); - if ((d->hData.move.value() - maxX < width()/2 || d->hData.move.value() - d->hData.flickTarget < width()/2) - && maxX != d->hData.flickTarget) - d->flickX(-d->hData.smoothVelocity.value()); - d->bufferMode = d->isRightToLeft() - ? QDeclarative1ListViewPrivate::BufferBefore : QDeclarative1ListViewPrivate::BufferAfter; - } - } - d->inFlickCorrection = false; - } - d->inViewportMoved = false; -} - -qreal QDeclarative1ListView::minYExtent() const -{ - Q_D(const QDeclarative1ListView); - if (d->orient == QDeclarative1ListView::Horizontal) - return QDeclarative1Flickable::minYExtent(); - if (d->minExtentDirty) { - d->minExtent = -d->startPosition(); - if (d->header && d->visibleItems.count()) - d->minExtent += d->header->size(); - if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange) { - d->minExtent += d->highlightRangeStart; - if (d->sectionCriteria) { - if (d->visibleItem(0)) - d->minExtent -= d->visibleItem(0)->sectionSize(); - } - d->minExtent = qMax(d->minExtent, -(d->endPositionAt(0) - d->highlightRangeEnd + 1)); - } - d->minExtentDirty = false; - } - - return d->minExtent; -} - -qreal QDeclarative1ListView::maxYExtent() const -{ - Q_D(const QDeclarative1ListView); - if (d->orient == QDeclarative1ListView::Horizontal) - return height(); - if (d->maxExtentDirty) { - if (!d->model || !d->model->count()) { - d->maxExtent = d->header ? -d->header->size() : 0; - d->maxExtent += height(); - } else if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange) { - d->maxExtent = -(d->positionAt(d->model->count()-1) - d->highlightRangeStart); - if (d->highlightRangeEnd != d->highlightRangeStart) - d->maxExtent = qMin(d->maxExtent, -(d->endPosition() - d->highlightRangeEnd + 1)); - } else { - d->maxExtent = -(d->endPosition() - height() + 1); - } - if (d->footer) - d->maxExtent -= d->footer->size(); - qreal minY = minYExtent(); - if (d->maxExtent > minY) - d->maxExtent = minY; - d->maxExtentDirty = false; - } - return d->maxExtent; -} - -qreal QDeclarative1ListView::minXExtent() const -{ - Q_D(const QDeclarative1ListView); - if (d->orient == QDeclarative1ListView::Vertical) - return QDeclarative1Flickable::minXExtent(); - if (d->minExtentDirty) { - d->minExtent = -d->startPosition(); - - qreal highlightStart; - qreal highlightEnd; - qreal endPositionFirstItem = 0; - if (d->isRightToLeft()) { - if (d->model && d->model->count()) - endPositionFirstItem = d->positionAt(d->model->count()-1); - else if (d->header) - d->minExtent += d->header->size(); - highlightStart = d->highlightRangeStartValid - ? d->highlightRangeStart - (d->lastPosition()-endPositionFirstItem) - : d->size() - (d->lastPosition()-endPositionFirstItem); - highlightEnd = d->highlightRangeEndValid ? d->highlightRangeEnd : d->size(); - if (d->footer) - d->minExtent += d->footer->size(); - qreal maxX = maxXExtent(); - if (d->minExtent < maxX) - d->minExtent = maxX; - } else { - endPositionFirstItem = d->endPositionAt(0); - highlightStart = d->highlightRangeStart; - highlightEnd = d->highlightRangeEnd; - if (d->header && d->visibleItems.count()) - d->minExtent += d->header->size(); - } - if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange) { - d->minExtent += d->isRightToLeft() ? -highlightStart : highlightStart; - d->minExtent = qMax(d->minExtent, -(endPositionFirstItem - highlightEnd + 1)); - } - d->minExtentDirty = false; - } - - return d->minExtent; -} - -qreal QDeclarative1ListView::maxXExtent() const -{ - Q_D(const QDeclarative1ListView); - if (d->orient == QDeclarative1ListView::Vertical) - return width(); - if (d->maxExtentDirty) { - qreal highlightStart; - qreal highlightEnd; - qreal lastItemPosition = 0; - d->maxExtent = 0; - if (d->isRightToLeft()) { - highlightStart = d->highlightRangeStartValid ? d->highlightRangeEnd : d->size(); - highlightEnd = d->highlightRangeEndValid ? d->highlightRangeStart : d->size(); - lastItemPosition = d->endPosition(); - } else { - highlightStart = d->highlightRangeStart; - highlightEnd = d->highlightRangeEnd; - if (d->model && d->model->count()) - lastItemPosition = d->positionAt(d->model->count()-1); - } - if (!d->model || !d->model->count()) { - if (!d->isRightToLeft()) - d->maxExtent = d->header ? -d->header->size() : 0; - d->maxExtent += width(); - } else if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange) { - d->maxExtent = -(lastItemPosition - highlightStart); - if (highlightEnd != highlightStart) { - d->maxExtent = d->isRightToLeft() - ? qMax(d->maxExtent, -(d->endPosition() - highlightEnd + 1)) - : qMin(d->maxExtent, -(d->endPosition() - highlightEnd + 1)); - } - } else { - d->maxExtent = -(d->endPosition() - width() + 1); - } - if (d->isRightToLeft()) { - if (d->header && d->visibleItems.count()) - d->maxExtent -= d->header->size(); - } else { - if (d->footer) - d->maxExtent -= d->footer->size(); - qreal minX = minXExtent(); - if (d->maxExtent > minX) - d->maxExtent = minX; - } - d->maxExtentDirty = false; - } - return d->maxExtent; -} - -void QDeclarative1ListView::keyPressEvent(QKeyEvent *event) -{ - Q_D(QDeclarative1ListView); - keyPressPreHandler(event); - if (event->isAccepted()) - return; - - if (d->model && d->model->count() && d->interactive) { - if ((d->orient == QDeclarative1ListView::Horizontal && !d->isRightToLeft() && event->key() == Qt::Key_Left) - || (d->orient == QDeclarative1ListView::Horizontal && d->isRightToLeft() && event->key() == Qt::Key_Right) - || (d->orient == QDeclarative1ListView::Vertical && event->key() == Qt::Key_Up)) { - if (currentIndex() > 0 || (d->wrap && !event->isAutoRepeat())) { - decrementCurrentIndex(); - event->accept(); - return; - } else if (d->wrap) { - event->accept(); - return; - } - } else if ((d->orient == QDeclarative1ListView::Horizontal && !d->isRightToLeft() && event->key() == Qt::Key_Right) - || (d->orient == QDeclarative1ListView::Horizontal && d->isRightToLeft() && event->key() == Qt::Key_Left) - || (d->orient == QDeclarative1ListView::Vertical && event->key() == Qt::Key_Down)) { - if (currentIndex() < d->model->count() - 1 || (d->wrap && !event->isAutoRepeat())) { - incrementCurrentIndex(); - event->accept(); - return; - } else if (d->wrap) { - event->accept(); - return; - } - } - } - event->ignore(); - QDeclarative1Flickable::keyPressEvent(event); -} - -void QDeclarative1ListView::geometryChanged(const QRectF &newGeometry, - const QRectF &oldGeometry) -{ - Q_D(QDeclarative1ListView); - d->maxExtentDirty = true; - d->minExtentDirty = true; - if (d->isRightToLeft() && d->orient == QDeclarative1ListView::Horizontal) { - // maintain position relative to the right edge - int dx = newGeometry.width() - oldGeometry.width(); - setContentX(contentX() - dx); - } - QDeclarative1Flickable::geometryChanged(newGeometry, oldGeometry); -} - - -/*! - \qmlmethod QtQuick1::ListView::incrementCurrentIndex() - - Increments the current index. The current index will wrap - if keyNavigationWraps is true and it is currently at the end. - This method has no effect if the \l count is zero. - - \bold Note: methods should only be called after the Component has completed. -*/ -void QDeclarative1ListView::incrementCurrentIndex() -{ - Q_D(QDeclarative1ListView); - int count = d->model ? d->model->count() : 0; - if (count && (currentIndex() < count - 1 || d->wrap)) { - d->moveReason = QDeclarative1ListViewPrivate::SetIndex; - int index = currentIndex()+1; - setCurrentIndex((index >= 0 && index < count) ? index : 0); - } -} - -/*! - \qmlmethod QtQuick1::ListView::decrementCurrentIndex() - - Decrements the current index. The current index will wrap - if keyNavigationWraps is true and it is currently at the beginning. - This method has no effect if the \l count is zero. - - \bold Note: methods should only be called after the Component has completed. -*/ -void QDeclarative1ListView::decrementCurrentIndex() -{ - Q_D(QDeclarative1ListView); - int count = d->model ? d->model->count() : 0; - if (count && (currentIndex() > 0 || d->wrap)) { - d->moveReason = QDeclarative1ListViewPrivate::SetIndex; - int index = currentIndex()-1; - setCurrentIndex((index >= 0 && index < count) ? index : count-1); - } -} - -void QDeclarative1ListViewPrivate::positionViewAtIndex(int index, int mode) -{ - Q_Q(QDeclarative1ListView); - if (!isValid()) - return; - if (mode < QDeclarative1ListView::Beginning || mode > QDeclarative1ListView::Contain) - return; - int idx = qMax(qMin(index, model->count()-1), 0); - - if (layoutScheduled) - layout(); - qreal pos = isRightToLeft() ? -position() - size() : position(); - FxListItem1 *item = visibleItem(idx); - qreal maxExtent; - if (orient == QDeclarative1ListView::Vertical) - maxExtent = -q->maxYExtent(); - else - maxExtent = isRightToLeft() ? q->minXExtent()-size(): -q->maxXExtent(); - - if (!item) { - int itemPos = positionAt(idx); - // save the currently visible items in case any of them end up visible again - QList<FxListItem1*> oldVisible = visibleItems; - visibleItems.clear(); - visiblePos = itemPos; - visibleIndex = idx; - setPosition(qMin(qreal(itemPos), maxExtent)); - // now release the reference to all the old visible items. - for (int i = 0; i < oldVisible.count(); ++i) - releaseItem(oldVisible.at(i)); - item = visibleItem(idx); - } - if (item) { - const qreal itemPos = item->position(); - switch (mode) { - case QDeclarative1ListView::Beginning: - pos = itemPos; - if (index < 0 && header) - pos -= header->size(); - break; - case QDeclarative1ListView::Center: - pos = itemPos - (size() - item->size())/2; - break; - case QDeclarative1ListView::End: - pos = itemPos - size() + item->size(); - if (index >= model->count() && footer) - pos += footer->size(); - break; - case QDeclarative1ListView::Visible: - if (itemPos > pos + size()) - pos = itemPos - size() + item->size(); - else if (item->endPosition() < pos) - pos = itemPos; - break; - case QDeclarative1ListView::Contain: - if (item->endPosition() > pos + size()) - pos = itemPos - size() + item->size(); - if (itemPos < pos) - pos = itemPos; - } - pos = qMin(pos, maxExtent); - qreal minExtent; - if (orient == QDeclarative1ListView::Vertical) { - minExtent = -q->minYExtent(); - } else { - minExtent = isRightToLeft() ? q->maxXExtent()-size(): -q->minXExtent(); - } - pos = qMax(pos, minExtent); - moveReason = QDeclarative1ListViewPrivate::Other; - q->cancelFlick(); - setPosition(pos); - if (highlight) { - if (autoHighlight) { - highlight->setPosition(currentItem->itemPosition()); - highlight->setSize(currentItem->itemSize()); - } - updateHighlight(); - } - } - fixupPosition(); -} - -/*! - \qmlmethod QtQuick1::ListView::positionViewAtIndex(int index, PositionMode mode) - - Positions the view such that the \a index is at the position specified by - \a mode: - - \list - \o ListView.Beginning - position item at the top (or left for horizontal orientation) of the view. - \o ListView.Center - position item in the center of the view. - \o ListView.End - position item at bottom (or right for horizontal orientation) of the view. - \o ListView.Visible - if any part of the item is visible then take no action, otherwise - bring the item into view. - \o ListView.Contain - ensure the entire item is visible. If the item is larger than - the view the item is positioned at the top (or left for horizontal orientation) of the view. - \endlist - - If positioning the view at \a index would cause empty space to be displayed at - the beginning or end of the view, the view will be positioned at the boundary. - - It is not recommended to use \l {Flickable::}{contentX} or \l {Flickable::}{contentY} to position the view - at a particular index. This is unreliable since removing items from the start - of the list does not cause all other items to be repositioned, and because - the actual start of the view can vary based on the size of the delegates. - The correct way to bring an item into view is with \c positionViewAtIndex. - - \bold Note: methods should only be called after the Component has completed. To position - the view at startup, this method should be called by Component.onCompleted. For - example, to position the view at the end: - - \code - Component.onCompleted: positionViewAtIndex(count - 1, ListView.Beginning) - \endcode -*/ -void QDeclarative1ListView::positionViewAtIndex(int index, int mode) -{ - Q_D(QDeclarative1ListView); - if (!d->isValid() || index < 0 || index >= d->model->count()) - return; - d->positionViewAtIndex(index, mode); -} - -/*! - \qmlmethod QtQuick1::ListView::positionViewAtBeginning() - \qmlmethod QtQuick1::ListView::positionViewAtEnd() - \since Quick 1.1 - - Positions the view at the beginning or end, taking into account any header or footer. - - It is not recommended to use \l {Flickable::}{contentX} or \l {Flickable::}{contentY} to position the view - at a particular index. This is unreliable since removing items from the start - of the list does not cause all other items to be repositioned, and because - the actual start of the view can vary based on the size of the delegates. - - \bold Note: methods should only be called after the Component has completed. To position - the view at startup, this method should be called by Component.onCompleted. For - example, to position the view at the end on startup: - - \code - Component.onCompleted: positionViewAtEnd() - \endcode -*/ -void QDeclarative1ListView::positionViewAtBeginning() -{ - Q_D(QDeclarative1ListView); - if (!d->isValid()) - return; - d->positionViewAtIndex(-1, Beginning); -} - -void QDeclarative1ListView::positionViewAtEnd() -{ - Q_D(QDeclarative1ListView); - if (!d->isValid()) - return; - d->positionViewAtIndex(d->model->count(), End); -} - -/*! - \qmlmethod int QtQuick1::ListView::indexAt(int x, int y) - - Returns the index of the visible item containing the point \a x, \a y in content - coordinates. If there is no item at the point specified, or the item is - not visible -1 is returned. - - If the item is outside the visible area, -1 is returned, regardless of - whether an item will exist at that point when scrolled into view. - - \bold Note: methods should only be called after the Component has completed. -*/ -int QDeclarative1ListView::indexAt(qreal x, qreal y) const -{ - Q_D(const QDeclarative1ListView); - for (int i = 0; i < d->visibleItems.count(); ++i) { - const FxListItem1 *listItem = d->visibleItems.at(i); - if(listItem->contains(x, y)) - return listItem->index; - } - - return -1; -} - -void QDeclarative1ListView::componentComplete() -{ - Q_D(QDeclarative1ListView); - QDeclarative1Flickable::componentComplete(); - updateSections(); - d->updateHeader(); - d->updateFooter(); - if (d->isValid()) { - refill(); - d->moveReason = QDeclarative1ListViewPrivate::SetIndex; - if (d->currentIndex < 0 && !d->currentIndexCleared) - d->updateCurrent(0); - else - d->updateCurrent(d->currentIndex); - if (d->highlight && d->currentItem) { - if (d->autoHighlight) - d->highlight->setPosition(d->currentItem->position()); - d->updateTrackedItem(); - } - d->moveReason = QDeclarative1ListViewPrivate::Other; - d->fixupPosition(); - } -} - -void QDeclarative1ListView::updateSections() -{ - Q_D(QDeclarative1ListView); - if (isComponentComplete() && d->model) { - QList<QByteArray> roles; - if (d->sectionCriteria && !d->sectionCriteria->property().isEmpty()) - roles << d->sectionCriteria->property().toUtf8(); - d->model->setWatchedRoles(roles); - d->updateSections(); - if (d->itemCount) - d->layout(); - } -} - -void QDeclarative1ListView::refill() -{ - Q_D(QDeclarative1ListView); - if (d->isRightToLeft()) - d->refill(-d->position()-d->size()+1, -d->position()); - else - d->refill(d->position(), d->position()+d->size()-1); -} - -void QDeclarative1ListView::trackedPositionChanged() -{ - Q_D(QDeclarative1ListView); - if (!d->trackedItem || !d->currentItem) - return; - if (d->moveReason == QDeclarative1ListViewPrivate::SetIndex) { - qreal trackedPos = qCeil(d->trackedItem->position()); - qreal trackedSize = d->trackedItem->size(); - if (d->trackedItem != d->currentItem) { - trackedSize += d->currentItem->sectionSize(); - } - qreal viewPos; - qreal highlightStart; - qreal highlightEnd; - if (d->isRightToLeft()) { - viewPos = -d->position()-d->size(); - highlightStart = d->highlightRangeStartValid ? d->size()-d->highlightRangeEnd : d->highlightRangeStart; - highlightEnd = d->highlightRangeEndValid ? d->size()-d->highlightRangeStart : d->highlightRangeEnd; - } else { - viewPos = d->position(); - highlightStart = d->highlightRangeStart; - highlightEnd = d->highlightRangeEnd; - } - qreal pos = viewPos; - if (d->haveHighlightRange) { - if (d->highlightRange == StrictlyEnforceRange) { - if (trackedPos > pos + highlightEnd - d->trackedItem->size()) - pos = trackedPos - highlightEnd + d->trackedItem->size(); - if (trackedPos < pos + highlightStart) - pos = trackedPos - highlightStart; - } else { - if (trackedPos < d->startPosition() + highlightStart) { - pos = d->startPosition(); - } else if (d->trackedItem->endPosition() > d->endPosition() - d->size() + highlightEnd) { - pos = d->endPosition() - d->size() + 1; - if (pos < d->startPosition()) - pos = d->startPosition(); - } else { - if (trackedPos > pos + highlightEnd - trackedSize) - pos = trackedPos - highlightEnd + trackedSize; - if (trackedPos < pos + highlightStart) - pos = trackedPos - highlightStart; - } - } - } else { - if (trackedPos < viewPos && d->currentItem->position() < viewPos) { - pos = d->currentItem->position() < trackedPos ? trackedPos : d->currentItem->position(); - } else if (d->trackedItem->endPosition() >= viewPos + d->size() - && d->currentItem->endPosition() >= viewPos + d->size()) { - if (d->trackedItem->endPosition() <= d->currentItem->endPosition()) { - pos = d->trackedItem->endPosition() - d->size() + 1; - if (trackedSize > d->size()) - pos = trackedPos; - } else { - pos = d->currentItem->endPosition() - d->size() + 1; - if (d->currentItem->size() > d->size()) - pos = d->currentItem->position(); - } - } - } - if (viewPos != pos) { - cancelFlick(); - d->calcVelocity = true; - d->setPosition(pos); - d->calcVelocity = false; - } - } -} - -void QDeclarative1ListView::itemsInserted(int modelIndex, int count) -{ - Q_D(QDeclarative1ListView); - if (!isComponentComplete() || !d->model || !d->model->isValid()) - return; - d->updateUnrequestedIndexes(); - d->moveReason = QDeclarative1ListViewPrivate::Other; - - qreal tempPos = d->isRightToLeft() ? -d->position()-d->size() : d->position(); - int index = d->visibleItems.count() ? d->mapFromModel(modelIndex) : 0; - - if (index < 0) { - int i = d->visibleItems.count() - 1; - while (i > 0 && d->visibleItems.at(i)->index == -1) - --i; - if (i == 0 && d->visibleItems.first()->index == -1) { - // there are no visible items except items marked for removal - index = d->visibleItems.count(); - } else if (d->visibleItems.at(i)->index + 1 == modelIndex - && d->visibleItems.at(i)->endPosition() < d->buffer+tempPos+d->size()-1) { - // Special case of appending an item to the model. - index = d->visibleItems.count(); - } else { - if (modelIndex < d->visibleIndex) { - // Insert before visible items - d->visibleIndex += count; - for (int i = 0; i < d->visibleItems.count(); ++i) { - FxListItem1 *listItem = d->visibleItems.at(i); - if (listItem->index != -1 && listItem->index >= modelIndex) - listItem->index += count; - } - } - if (d->currentIndex >= modelIndex) { - // adjust current item index - d->currentIndex += count; - if (d->currentItem) - d->currentItem->index = d->currentIndex; - emit currentIndexChanged(); - } - d->scheduleLayout(); - d->itemCount += count; - emit countChanged(); - return; - } - } - - // index can be the next item past the end of the visible items list (i.e. appended) - int pos = 0; - if (d->visibleItems.count()) { - pos = index < d->visibleItems.count() ? d->visibleItems.at(index)->position() - : d->visibleItems.last()->endPosition()+d->spacing+1; - } else if (d->itemCount == 0 && d->header) { - pos = d->header->size(); - } - - int initialPos = pos; - int diff = 0; - QList<FxListItem1*> added; - bool addedVisible = false; - FxListItem1 *firstVisible = d->firstVisibleItem(); - if (firstVisible && pos < firstVisible->position()) { - // Insert items before the visible item. - int insertionIdx = index; - int i = 0; - int from = tempPos - d->buffer; - for (i = count-1; i >= 0 && pos > from; --i) { - if (!addedVisible) { - d->scheduleLayout(); - addedVisible = true; - } - FxListItem1 *item = d->createItem(modelIndex + i); - d->visibleItems.insert(insertionIdx, item); - pos -= item->size() + d->spacing; - item->setPosition(pos); - index++; - } - if (i >= 0) { - // If we didn't insert all our new items - anything - // before the current index is not visible - remove it. - while (insertionIdx--) { - FxListItem1 *item = d->visibleItems.takeFirst(); - if (item->index != -1) - d->visibleIndex++; - d->releaseItem(item); - } - } else { - // adjust pos of items before inserted items. - for (int i = insertionIdx-1; i >= 0; i--) { - FxListItem1 *listItem = d->visibleItems.at(i); - listItem->setPosition(listItem->position() - (initialPos - pos)); - } - } - } else { - int i = 0; - int to = d->buffer+tempPos+d->size(); - for (i = 0; i < count && pos <= to; ++i) { - if (!addedVisible) { - d->scheduleLayout(); - addedVisible = true; - } - FxListItem1 *item = d->createItem(modelIndex + i); - d->visibleItems.insert(index, item); - item->setPosition(pos); - added.append(item); - pos += item->size() + d->spacing; - ++index; - } - if (i != count) { - // We didn't insert all our new items, which means anything - // beyond the current index is not visible - remove it. - while (d->visibleItems.count() > index) - d->releaseItem(d->visibleItems.takeLast()); - } - diff = pos - initialPos; - } - if (d->itemCount && d->currentIndex >= modelIndex) { - // adjust current item index - d->currentIndex += count; - if (d->currentItem) { - d->currentItem->index = d->currentIndex; - d->currentItem->setPosition(d->currentItem->position() + diff); - } - emit currentIndexChanged(); - } else if (!d->itemCount && (!d->currentIndex || (d->currentIndex < 0 && !d->currentIndexCleared))) { - d->updateCurrent(0); - } - // Update the indexes of the following visible items. - for (; index < d->visibleItems.count(); ++index) { - FxListItem1 *listItem = d->visibleItems.at(index); - if (d->currentItem && listItem->item != d->currentItem->item) - listItem->setPosition(listItem->position() + diff); - if (listItem->index != -1) - listItem->index += count; - } - // everything is in order now - emit add() signal - for (int j = 0; j < added.count(); ++j) - added.at(j)->attached->emitAdd(); - - d->updateSections(); - d->itemCount += count; - emit countChanged(); -} - -void QDeclarative1ListView::itemsRemoved(int modelIndex, int count) -{ - Q_D(QDeclarative1ListView); - if (!isComponentComplete() || !d->model || !d->model->isValid()) - return; - d->moveReason = QDeclarative1ListViewPrivate::Other; - d->updateUnrequestedIndexes(); - d->itemCount -= count; - - FxListItem1 *firstVisible = d->firstVisibleItem(); - int preRemovedSize = 0; - bool removedVisible = false; - // Remove the items from the visible list, skipping anything already marked for removal - QList<FxListItem1*>::Iterator it = d->visibleItems.begin(); - while (it != d->visibleItems.end()) { - FxListItem1 *item = *it; - if (item->index == -1 || item->index < modelIndex) { - // already removed, or before removed items - ++it; - } else if (item->index >= modelIndex + count) { - // after removed items - item->index -= count; - ++it; - } else { - // removed item - if (!removedVisible) { - d->scheduleLayout(); - removedVisible = true; - } - item->attached->emitRemove(); - if (item->attached->delayRemove()) { - item->index = -1; - connect(item->attached, SIGNAL(delayRemoveChanged()), this, SLOT(destroyRemoved()), Qt::QueuedConnection); - ++it; - } else { - if (item == firstVisible) - firstVisible = 0; - if (firstVisible && item->position() < firstVisible->position()) - preRemovedSize += item->size(); - it = d->visibleItems.erase(it); - d->releaseItem(item); - } - } - } - - if (firstVisible && d->visibleItems.first() != firstVisible) - d->visibleItems.first()->setPosition(d->visibleItems.first()->position() + preRemovedSize); - - // update visibleIndex - bool haveVisibleIndex = false; - for (it = d->visibleItems.begin(); it != d->visibleItems.end(); ++it) { - if ((*it)->index != -1) { - d->visibleIndex = (*it)->index; - haveVisibleIndex = true; - break; - } - } - - // fix current - if (d->currentIndex >= modelIndex + count) { - d->currentIndex -= count; - if (d->currentItem) - d->currentItem->index -= count; - emit currentIndexChanged(); - } else if (d->currentIndex >= modelIndex && d->currentIndex < modelIndex + count) { - // current item has been removed. - d->currentItem->attached->setIsCurrentItem(false); - d->releaseItem(d->currentItem); - d->currentItem = 0; - d->currentIndex = -1; - if (d->itemCount) - d->updateCurrent(qMin(modelIndex, d->itemCount-1)); - else - emit currentIndexChanged(); - } - - if (!haveVisibleIndex) { - d->timeline.clear(); - if (removedVisible && d->itemCount == 0) { - d->visibleIndex = 0; - d->visiblePos = d->header ? d->header->size() : 0; - d->setPosition(0); - d->updateHeader(); - d->updateFooter(); - update(); - } else { - if (modelIndex < d->visibleIndex) - d->visibleIndex = modelIndex+1; - d->visibleIndex = qMax(qMin(d->visibleIndex, d->itemCount-1), 0); - } - } - - d->updateSections(); - emit countChanged(); -} - -void QDeclarative1ListView::destroyRemoved() -{ - Q_D(QDeclarative1ListView); - for (QList<FxListItem1*>::Iterator it = d->visibleItems.begin(); - it != d->visibleItems.end();) { - FxListItem1 *listItem = *it; - if (listItem->index == -1 && listItem->attached->delayRemove() == false) { - d->releaseItem(listItem); - it = d->visibleItems.erase(it); - } else { - ++it; - } - } - - // Correct the positioning of the items - d->updateSections(); - d->layout(); -} - -void QDeclarative1ListView::itemsMoved(int from, int to, int count) -{ - Q_D(QDeclarative1ListView); - if (!isComponentComplete() || !d->isValid()) - return; - d->updateUnrequestedIndexes(); - - if (d->visibleItems.isEmpty()) { - refill(); - return; - } - - d->moveReason = QDeclarative1ListViewPrivate::Other; - FxListItem1 *firstVisible = d->firstVisibleItem(); - qreal firstItemPos = firstVisible->position(); - QHash<int,FxListItem1*> moved; - int moveBy = 0; - - QList<FxListItem1*>::Iterator it = d->visibleItems.begin(); - while (it != d->visibleItems.end()) { - FxListItem1 *item = *it; - if (item->index >= from && item->index < from + count) { - // take the items that are moving - item->index += (to-from); - moved.insert(item->index, item); - if (item->position() < firstItemPos) - moveBy += item->size(); - it = d->visibleItems.erase(it); - } else { - // move everything after the moved items. - if (item->index > from && item->index != -1) - item->index -= count; - ++it; - } - } - - int remaining = count; - int endIndex = d->visibleIndex; - it = d->visibleItems.begin(); - while (it != d->visibleItems.end()) { - FxListItem1 *item = *it; - if (remaining && item->index >= to && item->index < to + count) { - // place items in the target position, reusing any existing items - FxListItem1 *movedItem = moved.take(item->index); - if (!movedItem) - movedItem = d->createItem(item->index); - if (item->index <= firstVisible->index) - moveBy -= movedItem->size(); - it = d->visibleItems.insert(it, movedItem); - ++it; - --remaining; - } else { - if (item->index != -1) { - if (item->index >= to) { - // update everything after the moved items. - item->index += count; - } - endIndex = item->index; - } - ++it; - } - } - - // If we have moved items to the end of the visible items - // then add any existing moved items that we have - while (FxListItem1 *item = moved.take(endIndex+1)) { - d->visibleItems.append(item); - ++endIndex; - } - - // update visibleIndex - for (it = d->visibleItems.begin(); it != d->visibleItems.end(); ++it) { - if ((*it)->index != -1) { - d->visibleIndex = (*it)->index; - break; - } - } - - // Fix current index - if (d->currentIndex >= 0 && d->currentItem) { - int oldCurrent = d->currentIndex; - d->currentIndex = d->model->indexOf(d->currentItem->item, this); - if (oldCurrent != d->currentIndex) { - d->currentItem->index = d->currentIndex; - emit currentIndexChanged(); - } - } - - // Whatever moved items remain are no longer visible items. - while (moved.count()) { - int idx = moved.begin().key(); - FxListItem1 *item = moved.take(idx); - if (d->currentItem && item->item == d->currentItem->item) - item->setPosition(d->positionAt(idx)); - d->releaseItem(item); - } - - // Ensure we don't cause an ugly list scroll. - d->visibleItems.first()->setPosition(d->visibleItems.first()->position() + moveBy); - - d->updateSections(); - d->layout(); -} - -void QDeclarative1ListView::itemsChanged(int, int) -{ - Q_D(QDeclarative1ListView); - d->updateSections(); - d->layout(); -} - -void QDeclarative1ListView::modelReset() -{ - Q_D(QDeclarative1ListView); - d->moveReason = QDeclarative1ListViewPrivate::SetIndex; - d->regenerate(); - if (d->highlight && d->currentItem) { - if (d->autoHighlight) - d->highlight->setPosition(d->currentItem->position()); - d->updateTrackedItem(); - } - d->moveReason = QDeclarative1ListViewPrivate::Other; - emit countChanged(); -} - -void QDeclarative1ListView::createdItem(int index, QDeclarativeItem *item) -{ - Q_D(QDeclarative1ListView); - if (d->requestedIndex != index) { - item->setParentItem(contentItem()); - d->unrequestedItems.insert(item, index); - if (d->orient == QDeclarative1ListView::Vertical) { - item->setY(d->positionAt(index)); - } else { - if (d->isRightToLeft()) - item->setX(-d->positionAt(index)-item->width()); - else - item->setX(d->positionAt(index)); - } - } -} - -void QDeclarative1ListView::destroyingItem(QDeclarativeItem *item) -{ - Q_D(QDeclarative1ListView); - d->unrequestedItems.remove(item); -} - -void QDeclarative1ListView::animStopped() -{ - Q_D(QDeclarative1ListView); - d->bufferMode = QDeclarative1ListViewPrivate::NoBuffer; - if (d->haveHighlightRange && d->highlightRange == QDeclarative1ListView::StrictlyEnforceRange) - d->updateHighlight(); -} - -QDeclarative1ListViewAttached *QDeclarative1ListView::qmlAttachedProperties(QObject *obj) -{ - return new QDeclarative1ListViewAttached(obj); -} - - - -QT_END_NAMESPACE |