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Diffstat (limited to 'src/declarative/items/qsggridview.cpp')
| -rw-r--r-- | src/declarative/items/qsggridview.cpp | 2661 |
1 files changed, 2661 insertions, 0 deletions
diff --git a/src/declarative/items/qsggridview.cpp b/src/declarative/items/qsggridview.cpp new file mode 100644 index 0000000000..b65cd39e8e --- /dev/null +++ b/src/declarative/items/qsggridview.cpp @@ -0,0 +1,2661 @@ +// Commit: 806f031efeda71d3f4d7d2f949b437493e79cf52 +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtDeclarative module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qsggridview_p.h" +#include "qsgvisualitemmodel_p.h" +#include "qsgflickable_p_p.h" + +#include <private/qdeclarativesmoothedanimation_p_p.h> +#include <private/qlistmodelinterface_p.h> + +#include <QtGui/qevent.h> +#include <QtCore/qmath.h> +#include <QtCore/qcoreapplication.h> +#include <math.h> + +QT_BEGIN_NAMESPACE + +//---------------------------------------------------------------------------- + +class FxGridItemSG +{ +public: + FxGridItemSG(QSGItem *i, QSGGridView *v) : item(i), view(v) { + attached = static_cast<QSGGridViewAttached*>(qmlAttachedPropertiesObject<QSGGridView>(item)); + if (attached) + attached->setView(view); + } + ~FxGridItemSG() {} + + qreal rowPos() const { + qreal rowPos = 0; + if (view->flow() == QSGGridView::LeftToRight) { + rowPos = item->y(); + } else { + if (view->effectiveLayoutDirection() == Qt::RightToLeft) + rowPos = -view->cellWidth()-item->x(); + else + rowPos = item->x(); + } + return rowPos; + } + qreal colPos() const { + qreal colPos = 0; + if (view->flow() == QSGGridView::LeftToRight) { + if (view->effectiveLayoutDirection() == Qt::RightToLeft) { + int colSize = view->cellWidth(); + int columns = view->width()/colSize; + colPos = colSize * (columns-1) - item->x(); + } else { + colPos = item->x(); + } + } else { + colPos = item->y(); + } + + return colPos; + } + qreal endRowPos() const { + if (view->flow() == QSGGridView::LeftToRight) { + return item->y() + view->cellHeight() - 1; + } else { + if (view->effectiveLayoutDirection() == Qt::RightToLeft) + return -item->x() - 1; + else + return item->x() + view->cellWidth() - 1; + } + } + void setPosition(qreal col, qreal row) { + if (view->effectiveLayoutDirection() == Qt::RightToLeft) { + if (view->flow() == QSGGridView::LeftToRight) { + int columns = view->width()/view->cellWidth(); + item->setPos(QPointF((view->cellWidth() * (columns-1) - col), row)); + } else { + item->setPos(QPointF(-view->cellWidth()-row, col)); + } + } else { + if (view->flow() == QSGGridView::LeftToRight) + item->setPos(QPointF(col, row)); + else + item->setPos(QPointF(row, col)); + } + } + bool contains(qreal x, qreal y) const { + return (x >= item->x() && x < item->x() + view->cellWidth() && + y >= item->y() && y < item->y() + view->cellHeight()); + } + + QSGItem *item; + QSGGridView *view; + QSGGridViewAttached *attached; + int index; +}; + +//---------------------------------------------------------------------------- + +class QSGGridViewPrivate : public QSGFlickablePrivate +{ + Q_DECLARE_PUBLIC(QSGGridView) + +public: + QSGGridViewPrivate() + : currentItem(0), layoutDirection(Qt::LeftToRight), flow(QSGGridView::LeftToRight) + , visibleIndex(0) , currentIndex(-1) + , cellWidth(100), cellHeight(100), columns(1), requestedIndex(-1), itemCount(0) + , highlightRangeStart(0), highlightRangeEnd(0) + , highlightRange(QSGGridView::NoHighlightRange) + , highlightComponent(0), highlight(0), trackedItem(0) + , moveReason(Other), buffer(0), highlightXAnimator(0), highlightYAnimator(0) + , highlightMoveDuration(150) + , footerComponent(0), footer(0), headerComponent(0), header(0) + , bufferMode(BufferBefore | BufferAfter), snapMode(QSGGridView::NoSnap) + , ownModel(false), wrap(false), autoHighlight(true) + , fixCurrentVisibility(false), lazyRelease(false), layoutScheduled(false) + , deferredRelease(false), haveHighlightRange(false), currentIndexCleared(false) + , highlightRangeStartValid(false), highlightRangeEndValid(false) {} + + void init(); + void clear(); + FxGridItemSG *createItem(int modelIndex); + void releaseItem(FxGridItemSG *item); + void refill(qreal from, qreal to, bool doBuffer=false); + + void updateGrid(); + void scheduleLayout(); + void layout(); + void updateUnrequestedIndexes(); + void updateUnrequestedPositions(); + void updateTrackedItem(); + void createHighlight(); + void updateHighlight(); + void updateCurrent(int modelIndex); + void updateHeader(); + void updateFooter(); + void fixupPosition(); + + FxGridItemSG *visibleItem(int modelIndex) const { + if (modelIndex >= visibleIndex && modelIndex < visibleIndex + visibleItems.count()) { + for (int i = modelIndex - visibleIndex; i < visibleItems.count(); ++i) { + FxGridItemSG *item = visibleItems.at(i); + if (item->index == modelIndex) + return item; + } + } + return 0; + } + + bool isRightToLeftTopToBottom() const { + Q_Q(const QSGGridView); + return flow == QSGGridView::TopToBottom && q->effectiveLayoutDirection() == Qt::RightToLeft; + } + + void regenerate() { + Q_Q(QSGGridView); + if (q->isComponentComplete()) { + clear(); + updateGrid(); + setPosition(0); + q->refill(); + updateCurrent(currentIndex); + } + } + + void mirrorChange() { + Q_Q(QSGGridView); + regenerate(); + emit q->effectiveLayoutDirectionChanged(); + } + + qreal position() const { + Q_Q(const QSGGridView); + return flow == QSGGridView::LeftToRight ? q->contentY() : q->contentX(); + } + void setPosition(qreal pos) { + Q_Q(QSGGridView); + if (flow == QSGGridView::LeftToRight) { + q->QSGFlickable::setContentY(pos); + q->QSGFlickable::setContentX(0); + } else { + if (q->effectiveLayoutDirection() == Qt::LeftToRight) + q->QSGFlickable::setContentX(pos); + else + q->QSGFlickable::setContentX(-pos-size()); + q->QSGFlickable::setContentY(0); + } + } + int size() const { + Q_Q(const QSGGridView); + return flow == QSGGridView::LeftToRight ? q->height() : q->width(); + } + qreal originPosition() const { + qreal pos = 0; + if (!visibleItems.isEmpty()) + pos = visibleItems.first()->rowPos() - visibleIndex / columns * rowSize(); + return pos; + } + + qreal lastPosition() const { + qreal pos = 0; + if (model && model->count()) + pos = rowPosAt(model->count() - 1) + rowSize(); + return pos; + } + + qreal startPosition() const { + return isRightToLeftTopToBottom() ? -lastPosition()+1 : originPosition(); + } + + qreal endPosition() const { + return isRightToLeftTopToBottom() ? -originPosition()+1 : lastPosition(); + + } + + bool isValid() const { + return model && model->count() && model->isValid(); + } + + int rowSize() const { + return flow == QSGGridView::LeftToRight ? cellHeight : cellWidth; + } + int colSize() const { + return flow == QSGGridView::LeftToRight ? cellWidth : cellHeight; + } + + qreal colPosAt(int modelIndex) const { + if (FxGridItemSG *item = visibleItem(modelIndex)) + return item->colPos(); + if (!visibleItems.isEmpty()) { + if (modelIndex < visibleIndex) { + int count = (visibleIndex - modelIndex) % columns; + int col = visibleItems.first()->colPos() / colSize(); + col = (columns - count + col) % columns; + return col * colSize(); + } else { + int count = columns - 1 - (modelIndex - visibleItems.last()->index - 1) % columns; + return visibleItems.last()->colPos() - count * colSize(); + } + } else { + return (modelIndex % columns) * colSize(); + } + return 0; + } + qreal rowPosAt(int modelIndex) const { + if (FxGridItemSG *item = visibleItem(modelIndex)) + return item->rowPos(); + if (!visibleItems.isEmpty()) { + if (modelIndex < visibleIndex) { + int firstCol = visibleItems.first()->colPos() / colSize(); + int col = visibleIndex - modelIndex + (columns - firstCol - 1); + int rows = col / columns; + return visibleItems.first()->rowPos() - rows * rowSize(); + } else { + int count = modelIndex - visibleItems.last()->index; + int col = visibleItems.last()->colPos() + count * colSize(); + int rows = col / (columns * colSize()); + return visibleItems.last()->rowPos() + rows * rowSize(); + } + } else { + qreal pos = (modelIndex / columns) * rowSize(); + if (header) + pos += headerSize(); + return pos; + } + return 0; + } + + FxGridItemSG *firstVisibleItem() const { + const qreal pos = isRightToLeftTopToBottom() ? -position()-size() : position(); + for (int i = 0; i < visibleItems.count(); ++i) { + FxGridItemSG *item = visibleItems.at(i); + if (item->index != -1 && item->endRowPos() > pos) + return item; + } + return visibleItems.count() ? visibleItems.first() : 0; + } + + int lastVisibleIndex() const { + for (int i = 0; i < visibleItems.count(); ++i) { + FxGridItemSG *item = visibleItems.at(i); + if (item->index != -1) + return item->index; + } + return -1; + } + + // Map a model index to visibleItems list index. + // These may differ if removed items are still present in the visible list, + // e.g. doing a removal animation + int mapFromModel(int modelIndex) const { + if (modelIndex < visibleIndex || modelIndex >= visibleIndex + visibleItems.count()) + return -1; + for (int i = 0; i < visibleItems.count(); ++i) { + FxGridItemSG *listItem = visibleItems.at(i); + if (listItem->index == modelIndex) + return i + visibleIndex; + if (listItem->index > modelIndex) + return -1; + } + return -1; // Not in visibleList + } + + qreal snapPosAt(qreal pos) const { + Q_Q(const QSGGridView); + qreal snapPos = 0; + if (!visibleItems.isEmpty()) { + pos += rowSize()/2; + snapPos = visibleItems.first()->rowPos() - visibleIndex / columns * rowSize(); + snapPos = pos - fmodf(pos - snapPos, qreal(rowSize())); + qreal maxExtent; + qreal minExtent; + if (isRightToLeftTopToBottom()) { + maxExtent = q->minXExtent(); + minExtent = q->maxXExtent(); + } else { + maxExtent = flow == QSGGridView::LeftToRight ? -q->maxYExtent() : -q->maxXExtent(); + minExtent = flow == QSGGridView::LeftToRight ? -q->minYExtent() : -q->minXExtent(); + } + if (snapPos > maxExtent) + snapPos = maxExtent; + if (snapPos < minExtent) + snapPos = minExtent; + } + return snapPos; + } + + FxGridItemSG *snapItemAt(qreal pos) { + for (int i = 0; i < visibleItems.count(); ++i) { + FxGridItemSG *item = visibleItems[i]; + if (item->index == -1) + continue; + qreal itemTop = item->rowPos(); + if (itemTop+rowSize()/2 >= pos && itemTop - rowSize()/2 <= pos) + return item; + } + return 0; + } + + int snapIndex() { + int index = currentIndex; + for (int i = 0; i < visibleItems.count(); ++i) { + FxGridItemSG *item = visibleItems[i]; + if (item->index == -1) + continue; + qreal itemTop = item->rowPos(); + if (itemTop >= highlight->rowPos()-rowSize()/2 && itemTop < highlight->rowPos()+rowSize()/2) { + index = item->index; + if (item->colPos() >= highlight->colPos()-colSize()/2 && item->colPos() < highlight->colPos()+colSize()/2) + return item->index; + } + } + return index; + } + + qreal headerSize() const { + if (!header) + return 0.0; + + return flow == QSGGridView::LeftToRight + ? header->item->height() + : header->item->width(); + } + + + virtual void itemGeometryChanged(QSGItem *item, const QRectF &newGeometry, const QRectF &oldGeometry) { + Q_Q(const QSGGridView); + QSGFlickablePrivate::itemGeometryChanged(item, newGeometry, oldGeometry); + if (item == q) { + if (newGeometry.height() != oldGeometry.height() + || newGeometry.width() != oldGeometry.width()) { + if (q->isComponentComplete()) { + updateGrid(); + scheduleLayout(); + } + } + } else if ((header && header->item == item) || (footer && footer->item == item)) { + if (header) + updateHeader(); + if (footer) + updateFooter(); + } + } + + void positionViewAtIndex(int index, int mode); + virtual void fixup(AxisData &data, qreal minExtent, qreal maxExtent); + virtual void flick(AxisData &data, qreal minExtent, qreal maxExtent, qreal vSize, + QDeclarativeTimeLineCallback::Callback fixupCallback, qreal velocity); + + // for debugging only + void checkVisible() const { + int skip = 0; + for (int i = 0; i < visibleItems.count(); ++i) { + FxGridItemSG *listItem = visibleItems.at(i); + if (listItem->index == -1) { + ++skip; + } else if (listItem->index != visibleIndex + i - skip) { + for (int j = 0; j < visibleItems.count(); j++) + qDebug() << " index" << j << "item index" << visibleItems.at(j)->index; + qFatal("index %d %d %d", visibleIndex, i, listItem->index); + } + } + } + + QDeclarativeGuard<QSGVisualModel> model; + QVariant modelVariant; + QList<FxGridItemSG*> visibleItems; + QHash<QSGItem*,int> unrequestedItems; + FxGridItemSG *currentItem; + Qt::LayoutDirection layoutDirection; + QSGGridView::Flow flow; + int visibleIndex; + int currentIndex; + int cellWidth; + int cellHeight; + int columns; + int requestedIndex; + int itemCount; + qreal highlightRangeStart; + qreal highlightRangeEnd; + QSGGridView::HighlightRangeMode highlightRange; + QDeclarativeComponent *highlightComponent; + FxGridItemSG *highlight; + FxGridItemSG *trackedItem; + enum MovementReason { Other, SetIndex, Mouse }; + MovementReason moveReason; + int buffer; + QSmoothedAnimation *highlightXAnimator; + QSmoothedAnimation *highlightYAnimator; + int highlightMoveDuration; + QDeclarativeComponent *footerComponent; + FxGridItemSG *footer; + QDeclarativeComponent *headerComponent; + FxGridItemSG *header; + enum BufferMode { NoBuffer = 0x00, BufferBefore = 0x01, BufferAfter = 0x02 }; + int bufferMode; + QSGGridView::SnapMode snapMode; + + bool ownModel : 1; + bool wrap : 1; + bool autoHighlight : 1; + bool fixCurrentVisibility : 1; + bool lazyRelease : 1; + bool layoutScheduled : 1; + bool deferredRelease : 1; + bool haveHighlightRange : 1; + bool currentIndexCleared : 1; + bool highlightRangeStartValid : 1; + bool highlightRangeEndValid : 1; +}; + +void QSGGridViewPrivate::init() +{ + Q_Q(QSGGridView); + QSGItemPrivate::get(contentItem)->childrenDoNotOverlap = true; + QObject::connect(q, SIGNAL(movementEnded()), q, SLOT(animStopped())); + q->setFlag(QSGItem::ItemIsFocusScope); + q->setFlickableDirection(QSGFlickable::VerticalFlick); + addItemChangeListener(this, Geometry); +} + +void QSGGridViewPrivate::clear() +{ + for (int i = 0; i < visibleItems.count(); ++i) + releaseItem(visibleItems.at(i)); + visibleItems.clear(); + visibleIndex = 0; + releaseItem(currentItem); + currentItem = 0; + createHighlight(); + trackedItem = 0; + itemCount = 0; +} + +FxGridItemSG *QSGGridViewPrivate::createItem(int modelIndex) +{ + Q_Q(QSGGridView); + // create object + requestedIndex = modelIndex; + FxGridItemSG *listItem = 0; + if (QSGItem *item = model->item(modelIndex, false)) { + listItem = new FxGridItemSG(item, q); + listItem->index = modelIndex; + if (model->completePending()) { + // complete + listItem->item->setZ(1); + listItem->item->setParentItem(q->contentItem()); + model->completeItem(); + } else { + listItem->item->setParentItem(q->contentItem()); + } + unrequestedItems.remove(listItem->item); + } + requestedIndex = -1; + return listItem; +} + + +void QSGGridViewPrivate::releaseItem(FxGridItemSG *item) +{ + Q_Q(QSGGridView); + if (!item || !model) + return; + if (trackedItem == item) { + QObject::disconnect(trackedItem->item, SIGNAL(yChanged()), q, SLOT(trackedPositionChanged())); + QObject::disconnect(trackedItem->item, SIGNAL(xChanged()), q, SLOT(trackedPositionChanged())); + trackedItem = 0; + } + 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)); + } + delete item; +} + +void QSGGridViewPrivate::refill(qreal from, qreal to, bool doBuffer) +{ + Q_Q(QSGGridView); + 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 changed = false; + + int colPos = colPosAt(visibleIndex); + int rowPos = rowPosAt(visibleIndex); + int modelIndex = visibleIndex; + if (visibleItems.count()) { + rowPos = visibleItems.last()->rowPos(); + colPos = visibleItems.last()->colPos() + colSize(); + if (colPos > colSize() * (columns-1)) { + colPos = 0; + rowPos += rowSize(); + } + int i = visibleItems.count() - 1; + while (i > 0 && visibleItems.at(i)->index == -1) + --i; + modelIndex = visibleItems.at(i)->index + 1; + } + + if (visibleItems.count() && (fillFrom > rowPos + rowSize()*2 + || fillTo < rowPosAt(visibleIndex) - rowSize())) { + // We've jumped more than a page. Estimate which items are now + // visible and fill from there. + int count = (fillFrom - (rowPos + rowSize())) / (rowSize()) * columns; + for (int i = 0; i < visibleItems.count(); ++i) + releaseItem(visibleItems.at(i)); + visibleItems.clear(); + modelIndex += count; + if (modelIndex >= model->count()) + modelIndex = model->count() - 1; + else if (modelIndex < 0) + modelIndex = 0; + modelIndex = modelIndex / columns * columns; + visibleIndex = modelIndex; + colPos = colPosAt(visibleIndex); + rowPos = rowPosAt(visibleIndex); + } + + int colNum = colPos / colSize(); + + FxGridItemSG *item = 0; + + // Item creation and release is staggered in order to avoid + // creating/releasing multiple items in one frame + // while flicking (as much as possible). + while (modelIndex < model->count() && rowPos <= fillTo + rowSize()*(columns - colNum)/(columns+1)) { +// qDebug() << "refill: append item" << modelIndex; + if (!(item = createItem(modelIndex))) + break; + item->setPosition(colPos, rowPos); + visibleItems.append(item); + colPos += colSize(); + colNum++; + if (colPos > colSize() * (columns-1)) { + colPos = 0; + colNum = 0; + rowPos += rowSize(); + } + ++modelIndex; + changed = true; + if (doBuffer) // never buffer more than one item per frame + break; + } + + if (visibleItems.count()) { + rowPos = visibleItems.first()->rowPos(); + colPos = visibleItems.first()->colPos() - colSize(); + if (colPos < 0) { + colPos = colSize() * (columns - 1); + rowPos -= rowSize(); + } + } + colNum = colPos / colSize(); + while (visibleIndex > 0 && rowPos + rowSize() - 1 >= fillFrom - rowSize()*(colNum+1)/(columns+1)){ +// qDebug() << "refill: prepend item" << visibleIndex-1 << "top pos" << rowPos << colPos; + if (!(item = createItem(visibleIndex-1))) + break; + --visibleIndex; + item->setPosition(colPos, rowPos); + visibleItems.prepend(item); + colPos -= colSize(); + colNum--; + if (colPos < 0) { + colPos = colSize() * (columns - 1); + colNum = columns-1; + rowPos -= rowSize(); + } + 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->rowPos()+rowSize()-1 < bufferFrom - rowSize()*(item->colPos()/colSize()+1)/(columns+1)) { + if (item->attached->delayRemove()) + break; +// qDebug() << "refill: remove first" << visibleIndex << "top end pos" << item->endRowPos(); + if (item->index != -1) + visibleIndex++; + visibleItems.removeFirst(); + releaseItem(item); + changed = true; + } + while (visibleItems.count() > 1 + && (item = visibleItems.last()) + && item->rowPos() > bufferTo + rowSize()*(columns - item->colPos()/colSize())/(columns+1)) { + if (item->attached->delayRemove()) + break; +// qDebug() << "refill: remove last" << visibleIndex+visibleItems.count()-1; + visibleItems.removeLast(); + releaseItem(item); + changed = true; + } + deferredRelease = false; + } else { + deferredRelease = true; + } + if (changed) { + if (header) + updateHeader(); + if (footer) + updateFooter(); + if (flow == QSGGridView::LeftToRight) + q->setContentHeight(endPosition() - startPosition()); + else + q->setContentWidth(endPosition() - startPosition()); + } else if (!doBuffer && buffer && bufferMode != NoBuffer) { + refill(from, to, true); + } + lazyRelease = false; +} + +void QSGGridViewPrivate::updateGrid() +{ + Q_Q(QSGGridView); + columns = (int)qMax((flow == QSGGridView::LeftToRight ? q->width() : q->height()) / colSize(), qreal(1.)); + if (isValid()) { + if (flow == QSGGridView::LeftToRight) + q->setContentHeight(endPosition() - startPosition()); + else + q->setContentWidth(lastPosition() - originPosition()); + } +} + +void QSGGridViewPrivate::scheduleLayout() +{ + Q_Q(QSGGridView); + if (!layoutScheduled) { + layoutScheduled = true; + q->polish(); + } +} + +void QSGGridViewPrivate::layout() +{ + Q_Q(QSGGridView); + layoutScheduled = false; + if (!isValid() && !visibleItems.count()) { + clear(); + return; + } + if (visibleItems.count()) { + qreal rowPos = visibleItems.first()->rowPos(); + qreal colPos = visibleItems.first()->colPos(); + int col = visibleIndex % columns; + if (colPos != col * colSize()) { + colPos = col * colSize(); + visibleItems.first()->setPosition(colPos, rowPos); + } + for (int i = 1; i < visibleItems.count(); ++i) { + FxGridItemSG *item = visibleItems.at(i); + colPos += colSize(); + if (colPos > colSize() * (columns-1)) { + colPos = 0; + rowPos += rowSize(); + } + item->setPosition(colPos, rowPos); + } + } + if (header) + updateHeader(); + if (footer) + updateFooter(); + q->refill(); + updateHighlight(); + moveReason = Other; + if (flow == QSGGridView::LeftToRight) { + q->setContentHeight(endPosition() - startPosition()); + fixupY(); + } else { + q->setContentWidth(endPosition() - startPosition()); + fixupX(); + } + updateUnrequestedPositions(); +} + +void QSGGridViewPrivate::updateUnrequestedIndexes() +{ + Q_Q(QSGGridView); + QHash<QSGItem*,int>::iterator it; + for (it = unrequestedItems.begin(); it != unrequestedItems.end(); ++it) + *it = model->indexOf(it.key(), q); +} + +void QSGGridViewPrivate::updateUnrequestedPositions() +{ + QHash<QSGItem*,int>::const_iterator it; + for (it = unrequestedItems.begin(); it != unrequestedItems.end(); ++it) { + QSGItem *item = it.key(); + if (flow == QSGGridView::LeftToRight) { + item->setPos(QPointF(colPosAt(*it), rowPosAt(*it))); + } else { + if (isRightToLeftTopToBottom()) + item->setPos(QPointF(-rowPosAt(*it)-item->width(), colPosAt(*it))); + else + item->setPos(QPointF(rowPosAt(*it), colPosAt(*it))); + } + } +} + +void QSGGridViewPrivate::updateTrackedItem() +{ + Q_Q(QSGGridView); + FxGridItemSG *item = currentItem; + if (highlight) + item = highlight; + + if (trackedItem && item != trackedItem) { + QObject::disconnect(trackedItem->item, SIGNAL(yChanged()), q, SLOT(trackedPositionChanged())); + QObject::disconnect(trackedItem->item, SIGNAL(xChanged()), q, SLOT(trackedPositionChanged())); + trackedItem = 0; + } + + if (!trackedItem && item) { + trackedItem = item; + QObject::connect(trackedItem->item, SIGNAL(yChanged()), q, SLOT(trackedPositionChanged())); + QObject::connect(trackedItem->item, SIGNAL(xChanged()), q, SLOT(trackedPositionChanged())); + } + if (trackedItem) + q->trackedPositionChanged(); +} + +void QSGGridViewPrivate::createHighlight() +{ + Q_Q(QSGGridView); + bool changed = false; + if (highlight) { + if (trackedItem == highlight) + trackedItem = 0; + highlight->item->setParentItem(0); + highlight->item->deleteLater(); + delete highlight; + highlight = 0; + delete highlightXAnimator; + delete highlightYAnimator; + highlightXAnimator = 0; + highlightYAnimator = 0; + changed = true; + } + + if (currentItem) { + QSGItem *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<QSGItem *>(nobj); + if (!item) + delete nobj; + } else { + delete highlightContext; + } + } else { + item = new QSGItem; + QDeclarative_setParent_noEvent(item, q->contentItem()); + item->setParentItem(q->contentItem()); + } + if (item) { + QDeclarative_setParent_noEvent(item, q->contentItem()); + item->setParentItem(q->contentItem()); + highlight = new FxGridItemSG(item, q); + if (currentItem && autoHighlight) + highlight->setPosition(currentItem->colPos(), currentItem->rowPos()); + highlightXAnimator = new QSmoothedAnimation(q); + highlightXAnimator->target = QDeclarativeProperty(highlight->item, QLatin1String("x")); + highlightXAnimator->userDuration = highlightMoveDuration; + highlightYAnimator = new QSmoothedAnimation(q); + highlightYAnimator->target = QDeclarativeProperty(highlight->item, QLatin1String("y")); + highlightYAnimator->userDuration = highlightMoveDuration; + if (autoHighlight) { + highlightXAnimator->restart(); + highlightYAnimator->restart(); + } + changed = true; + } + } + if (changed) + emit q->highlightItemChanged(); +} + +void QSGGridViewPrivate::updateHighlight() +{ + if ((!currentItem && highlight) || (currentItem && !highlight)) + createHighlight(); + if (currentItem && autoHighlight && highlight && !movingHorizontally && !movingVertically) { + // auto-update highlight + highlightXAnimator->to = currentItem->item->x(); + highlightYAnimator->to = currentItem->item->y(); + highlight->item->setWidth(currentItem->item->width()); + highlight->item->setHeight(currentItem->item->height()); + highlightXAnimator->restart(); + highlightYAnimator->restart(); + } + updateTrackedItem(); +} + +void QSGGridViewPrivate::updateCurrent(int modelIndex) +{ + Q_Q(QSGGridView); + 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; + } + + FxGridItemSG *oldCurrentItem = currentItem; + currentIndex = modelIndex; + currentItem = createItem(modelIndex); + fixCurrentVisibility = true; + if (oldCurrentItem && (!currentItem || oldCurrentItem->item != currentItem->item)) + oldCurrentItem->attached->setIsCurrentItem(false); + if (currentItem) { + currentItem->setPosition(colPosAt(modelIndex), rowPosAt(modelIndex)); + currentItem->item->setFocus(true); + currentItem->attached->setIsCurrentItem(true); + } + updateHighlight(); + emit q->currentIndexChanged(); + releaseItem(oldCurrentItem); +} + +void QSGGridViewPrivate::updateFooter() +{ + Q_Q(QSGGridView); + if (!footer && footerComponent) { + QSGItem *item = 0; + QDeclarativeContext *context = new QDeclarativeContext(qmlContext(q)); + QObject *nobj = footerComponent->create(context); + if (nobj) { + QDeclarative_setParent_noEvent(context, nobj); + item = qobject_cast<QSGItem *>(nobj); + if (!item) + delete nobj; + } else { + delete context; + } + if (item) { + QDeclarative_setParent_noEvent(item, q->contentItem()); + item->setParentItem(q->contentItem()); + item->setZ(1); + QSGItemPrivate *itemPrivate = QSGItemPrivate::get(item); + itemPrivate->addItemChangeListener(this, QSGItemPrivate::Geometry); + footer = new FxGridItemSG(item, q); + } + } + if (footer) { + qreal colOffset = 0; + qreal rowOffset; + if (isRightToLeftTopToBottom()) { + rowOffset = footer->item->width()-cellWidth; + } else { + rowOffset = 0; + if (q->effectiveLayoutDirection() == Qt::RightToLeft) + colOffset = footer->item->width()-cellWidth; + } + if (visibleItems.count()) { + qreal endPos = lastPosition(); + if (lastVisibleIndex() == model->count()-1) { + footer->setPosition(colOffset, endPos + rowOffset); + } else { + qreal visiblePos = isRightToLeftTopToBottom() ? -position() : position() + size(); + if (endPos <= visiblePos || footer->endRowPos() < endPos + rowOffset) + footer->setPosition(colOffset, endPos + rowOffset); + } + } else { + qreal endPos = 0; + if (header) { + endPos += (flow == QSGGridView::LeftToRight) ? header->item->height() : header->item->width(); + } + footer->setPosition(colOffset, endPos); + } + } +} + +void QSGGridViewPrivate::updateHeader() +{ + Q_Q(QSGGridView); + if (!header && headerComponent) { + QSGItem *item = 0; + QDeclarativeContext *context = new QDeclarativeContext(qmlContext(q)); + QObject *nobj = headerComponent->create(context); + if (nobj) { + QDeclarative_setParent_noEvent(context, nobj); + item = qobject_cast<QSGItem *>(nobj); + if (!item) + delete nobj; + } else { + delete context; + } + if (item) { + QDeclarative_setParent_noEvent(item, q->contentItem()); + item->setParentItem(q->contentItem()); + item->setZ(1); + QSGItemPrivate *itemPrivate = QSGItemPrivate::get(item); + itemPrivate->addItemChangeListener(this, QSGItemPrivate::Geometry); + header = new FxGridItemSG(item, q); + } + } + if (header) { + qreal colOffset = 0; + qreal rowOffset; + if (isRightToLeftTopToBottom()) { + rowOffset = -cellWidth; + } else { + rowOffset = -headerSize(); + if (q->effectiveLayoutDirection() == Qt::RightToLeft) + colOffset = header->item->width()-cellWidth; + } + if (visibleItems.count()) { + qreal startPos = originPosition(); + if (visibleIndex == 0) { + header->setPosition(colOffset, startPos + rowOffset); + } else { + qreal tempPos = isRightToLeftTopToBottom() ? -position()-size() : position(); + qreal headerPos = isRightToLeftTopToBottom() ? header->rowPos() + cellWidth - headerSize() : header->rowPos(); + if (tempPos <= startPos || headerPos > startPos + rowOffset) + header->setPosition(colOffset, startPos + rowOffset); + } + } else { + header->setPosition(colOffset, 0); + } + } +} + +void QSGGridViewPrivate::fixupPosition() +{ + moveReason = Other; + if (flow == QSGGridView::LeftToRight) + fixupY(); + else + fixupX(); +} + +void QSGGridViewPrivate::fixup(AxisData &data, qreal minExtent, qreal maxExtent) +{ + if ((flow == QSGGridView::TopToBottom && &data == &vData) + || (flow == QSGGridView::LeftToRight && &data == &hData)) + return; + + fixupMode = moveReason == Mouse ? fixupMode : Immediate; + + qreal highlightStart; + qreal highlightEnd; + qreal viewPos; + if (isRightToLeftTopToBottom()) { + // 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 != QSGGridView::NoSnap) { + qreal tempPosition = isRightToLeftTopToBottom() ? -position()-size() : position(); + FxGridItemSG *topItem = snapItemAt(tempPosition+highlightStart); + FxGridItemSG *bottomItem = snapItemAt(tempPosition+highlightEnd); + qreal pos; + if (topItem && bottomItem && haveHighlightRange && highlightRange == QSGGridView::StrictlyEnforceRange) { + qreal topPos = qMin(topItem->rowPos() - highlightStart, -maxExtent); + qreal bottomPos = qMax(bottomItem->rowPos() - highlightEnd, -minExtent); + pos = qAbs(data.move + topPos) < qAbs(data.move + bottomPos) ? topPos : bottomPos; + } else if (topItem) { + qreal headerPos = 0; + if (header) + headerPos = isRightToLeftTopToBottom() ? header->rowPos() + cellWidth - headerSize() : header->rowPos(); + if (topItem->index == 0 && header && tempPosition+highlightStart < headerPos+headerSize()/2) { + pos = isRightToLeftTopToBottom() ? - headerPos + highlightStart - size() : headerPos - highlightStart; + } else { + if (isRightToLeftTopToBottom()) + pos = qMax(qMin(-topItem->rowPos() + highlightStart - size(), -maxExtent), -minExtent); + else + pos = qMax(qMin(topItem->rowPos() - highlightStart, -maxExtent), -minExtent); + } + } else if (bottomItem) { + if (isRightToLeftTopToBottom()) + pos = qMax(qMin(-bottomItem->rowPos() + highlightStart - size(), -maxExtent), -minExtent); + else + pos = qMax(qMin(bottomItem->rowPos() - highlightStart, -maxExtent), -minExtent); + } else { + QSGFlickablePrivate::fixup(data, minExtent, maxExtent); + return; + } + if (currentItem && haveHighlightRange && highlightRange == QSGGridView::StrictlyEnforceRange) { + updateHighlight(); + qreal currPos = currentItem->rowPos(); + if (isRightToLeftTopToBottom()) + pos = -pos-size(); // Transform Pos if required + if (pos < currPos + rowSize() - highlightEnd) + pos = currPos + rowSize() - highlightEnd; + if (pos > currPos - highlightStart) + pos = currPos - highlightStart; + if (isRightToLeftTopToBottom()) + pos = -pos-size(); // Untransform + } + + 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 (haveHighlightRange && highlightRange == QSGGridView::StrictlyEnforceRange) { + if (currentItem) { + updateHighlight(); + qreal pos = currentItem->rowPos(); + if (viewPos < pos + rowSize() - highlightEnd) + viewPos = pos + rowSize() - highlightEnd; + if (viewPos > pos - highlightStart) + viewPos = pos - highlightStart; + if (isRightToLeftTopToBottom()) + 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 { + QSGFlickablePrivate::fixup(data, minExtent, maxExtent); + } + data.inOvershoot = false; + fixupMode = Normal; +} + +void QSGGridViewPrivate::flick(AxisData &data, qreal minExtent, qreal maxExtent, qreal vSize, + QDeclarativeTimeLineCallback::Callback fixupCallback, qreal velocity) +{ + Q_Q(QSGGridView); + data.fixingUp = false; + moveReason = Mouse; + if ((!haveHighlightRange || highlightRange != QSGGridView::StrictlyEnforceRange) + && snapMode == QSGGridView::NoSnap) { + QSGFlickablePrivate::flick(data, minExtent, maxExtent, vSize, fixupCallback, velocity); + return; + } + qreal maxDistance = 0; + qreal dataValue = isRightToLeftTopToBottom() ? -data.move.value()+size() : data.move.value(); + // -ve velocity means list is moving up/left + if (velocity > 0) { + if (data.move.value() < minExtent) { + if (snapMode == QSGGridView::SnapOneRow) { + if (FxGridItemSG *item = firstVisibleItem()) + maxDistance = qAbs(item->rowPos() + dataValue); + } else { + maxDistance = qAbs(minExtent - data.move.value()); + } + } + if (snapMode == QSGGridView::NoSnap && highlightRange != QSGGridView::StrictlyEnforceRange) + data.flickTarget = minExtent; + } else { + if (data.move.value() > maxExtent) { + if (snapMode == QSGGridView::SnapOneRow) { + qreal pos = snapPosAt(-dataValue) + (isRightToLeftTopToBottom() ? 0 : rowSize()); + maxDistance = qAbs(pos + dataValue); + } else { + maxDistance = qAbs(maxExtent - data.move.value()); + } + } + if (snapMode == QSGGridView::NoSnap && highlightRange != QSGGridView::StrictlyEnforceRange) + data.flickTarget = maxExtent; + } + bool overShoot = boundsBehavior == QSGFlickable::DragAndOvershootBounds; + qreal highlightStart = isRightToLeftTopToBottom() && highlightRangeStartValid ? size()-highlightRangeEnd : highlightRangeStart; + if (maxDistance > 0 || overShoot) { + // This mode requires the grid to stop exactly on a row boundary. + qreal v = velocity; + if (maxVelocity != -1 && maxVelocity < qAbs(v)) { + if (v < 0) + v = -maxVelocity; + else + v = maxVelocity; + } + qreal accel = deceleration; + qreal v2 = v * v; + qreal overshootDist = 0.0; + if ((maxDistance > 0.0 && v2 / (2.0f * maxDistance) < accel) || snapMode == QSGGridView::SnapOneRow) { + // + rowSize()/4 to encourage moving at least one item in the flick direction + qreal dist = v2 / (accel * 2.0) + rowSize()/4; + dist = qMin(dist, maxDistance); + if (v > 0) + dist = -dist; + qreal distTemp = isRightToLeftTopToBottom() ? -dist : dist; + data.flickTarget = -snapPosAt(-(dataValue - highlightStart) + distTemp) + highlightStart; + data.flickTarget = isRightToLeftTopToBottom() ? -data.flickTarget+size() : data.flickTarget; + 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 { + data.flickTarget = velocity > 0 ? minExtent : maxExtent; + overshootDist = overShoot ? overShootDistance(vSize) : 0; + } + timeline.reset(data.move); + timeline.accel(data.move, v, accel, maxDistance + overshootDist); + timeline.callback(QDeclarativeTimeLineCallback(&data.move, fixupCallback, this)); + if (!flickingHorizontally && q->xflick()) { + flickingHorizontally = true; + emit q->flickingChanged(); + emit q->flickingHorizontallyChanged(); + emit q->flickStarted(); + } + if (!flickingVertically && q->yflick()) { + flickingVertically = true; + emit q->flickingChanged(); + emit q->flickingVerticallyChanged(); + emit q->flickStarted(); + } + } else { + timeline.reset(data.move); + fixup(data, minExtent, maxExtent); + } +} + + +//---------------------------------------------------------------------------- + +QSGGridView::QSGGridView(QSGItem *parent) + : QSGFlickable(*(new QSGGridViewPrivate), parent) +{ + Q_D(QSGGridView); + d->init(); +} + +QSGGridView::~QSGGridView() +{ + Q_D(QSGGridView); + d->clear(); + if (d->ownModel) + delete d->model; + delete d->header; + delete d->footer; +} + +// For internal use +int QSGGridView::modelCount() const +{ + Q_D(const QSGGridView); + return d->model->count(); +} + +QVariant QSGGridView::model() const +{ + Q_D(const QSGGridView); + return d->modelVariant; +} + +void QSGGridView::setModel(const QVariant &model) +{ + Q_D(QSGGridView); + 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(modelReset()), this, SLOT(modelReset())); + disconnect(d->model, SIGNAL(createdItem(int,QSGItem*)), this, SLOT(createdItem(int,QSGItem*))); + disconnect(d->model, SIGNAL(destroyingItem(QSGItem*)), this, SLOT(destroyingItem(QSGItem*))); + } + d->clear(); + d->modelVariant = model; + QObject *object = qvariant_cast<QObject*>(model); + QSGVisualModel *vim = 0; + if (object && (vim = qobject_cast<QSGVisualModel *>(object))) { + if (d->ownModel) { + delete d->model; + d->ownModel = false; + } + d->model = vim; + } else { + if (!d->ownModel) { + d->model = new QSGVisualDataModel(qmlContext(this), this); + d->ownModel = true; + } + if (QSGVisualDataModel *dataModel = qobject_cast<QSGVisualDataModel*>(d->model)) + dataModel->setModel(model); + } + if (d->model) { + d->bufferMode = QSGGridViewPrivate::BufferBefore | QSGGridViewPrivate::BufferAfter; + if (isComponentComplete()) { + refill(); + if ((d->currentIndex >= d->model->count() || d->currentIndex < 0) && !d->currentIndexCleared) { + setCurrentIndex(0); + } else { + d->moveReason = QSGGridViewPrivate::SetIndex; + d->updateCurrent(d->currentIndex); + if (d->highlight && d->currentItem) { + if (d->autoHighlight) + d->highlight->setPosition(d->currentItem->colPos(), d->currentItem->rowPos()); + d->updateTrackedItem(); + } + d->moveReason = QSGGridViewPrivate::Other; + } + } + 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(modelReset()), this, SLOT(modelReset())); + connect(d->model, SIGNAL(createdItem(int,QSGItem*)), this, SLOT(createdItem(int,QSGItem*))); + connect(d->model, SIGNAL(destroyingItem(QSGItem*)), this, SLOT(destroyingItem(QSGItem*))); + emit countChanged(); + } + emit modelChanged(); +} + +QDeclarativeComponent *QSGGridView::delegate() const +{ + Q_D(const QSGGridView); + if (d->model) { + if (QSGVisualDataModel *dataModel = qobject_cast<QSGVisualDataModel*>(d->model)) + return dataModel->delegate(); + } + + return 0; +} + +void QSGGridView::setDelegate(QDeclarativeComponent *delegate) +{ + Q_D(QSGGridView); + if (delegate == this->delegate()) + return; + + if (!d->ownModel) { + d->model = new QSGVisualDataModel(qmlContext(this)); + d->ownModel = true; + } + if (QSGVisualDataModel *dataModel = qobject_cast<QSGVisualDataModel*>(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; + refill(); + d->moveReason = QSGGridViewPrivate::SetIndex; + d->updateCurrent(d->currentIndex); + if (d->highlight && d->currentItem) { + if (d->autoHighlight) + d->highlight->setPosition(d->currentItem->colPos(), d->currentItem->rowPos()); + d->updateTrackedItem(); + } + d->moveReason = QSGGridViewPrivate::Other; + } + if (oldCount != dataModel->count()) + emit countChanged(); + emit delegateChanged(); + } +} + +int QSGGridView::currentIndex() const +{ + Q_D(const QSGGridView); + return d->currentIndex; +} + +void QSGGridView::setCurrentIndex(int index) +{ + Q_D(QSGGridView); + if (d->requestedIndex >= 0) // currently creating item + return; + d->currentIndexCleared = (index == -1); + if (index == d->currentIndex) + return; + if (isComponentComplete() && d->isValid()) { + d->moveReason = QSGGridViewPrivate::SetIndex; + d->updateCurrent(index); + } else { + d->currentIndex = index; + emit currentIndexChanged(); + } +} + +QSGItem *QSGGridView::currentItem() +{ + Q_D(QSGGridView); + if (!d->currentItem) + return 0; + return d->currentItem->item; +} + +QSGItem *QSGGridView::highlightItem() +{ + Q_D(QSGGridView); + if (!d->highlight) + return 0; + return d->highlight->item; +} + +int QSGGridView::count() const +{ + Q_D(const QSGGridView); + if (d->model) + return d->model->count(); + return 0; +} + +QDeclarativeComponent *QSGGridView::highlight() const +{ + Q_D(const QSGGridView); + return d->highlightComponent; +} + +void QSGGridView::setHighlight(QDeclarativeComponent *highlight) +{ + Q_D(QSGGridView); + if (highlight != d->highlightComponent) { + d->highlightComponent = highlight; + d->updateCurrent(d->currentIndex); + emit highlightChanged(); + } +} + +bool QSGGridView::highlightFollowsCurrentItem() const +{ + Q_D(const QSGGridView); + return d->autoHighlight; +} + +void QSGGridView::setHighlightFollowsCurrentItem(bool autoHighlight) +{ + Q_D(QSGGridView); + if (d->autoHighlight != autoHighlight) { + d->autoHighlight = autoHighlight; + if (autoHighlight) { + d->updateHighlight(); + } else if (d->highlightXAnimator) { + d->highlightXAnimator->stop(); + d->highlightYAnimator->stop(); + } + } +} + +int QSGGridView::highlightMoveDuration() const +{ + Q_D(const QSGGridView); + return d->highlightMoveDuration; +} + +void QSGGridView::setHighlightMoveDuration(int duration) +{ + Q_D(QSGGridView); + if (d->highlightMoveDuration != duration) { + d->highlightMoveDuration = duration; + if (d->highlightYAnimator) { + d->highlightXAnimator->userDuration = d->highlightMoveDuration; + d->highlightYAnimator->userDuration = d->highlightMoveDuration; + } + emit highlightMoveDurationChanged(); + } +} + +qreal QSGGridView::preferredHighlightBegin() const +{ + Q_D(const QSGGridView); + return d->highlightRangeStart; +} + +void QSGGridView::setPreferredHighlightBegin(qreal start) +{ + Q_D(QSGGridView); + d->highlightRangeStartValid = true; + if (d->highlightRangeStart == start) + return; + d->highlightRangeStart = start; + d->haveHighlightRange = d->highlightRange != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; + emit preferredHighlightBeginChanged(); +} + +void QSGGridView::resetPreferredHighlightBegin() +{ + Q_D(QSGGridView); + d->highlightRangeStartValid = false; + if (d->highlightRangeStart == 0) + return; + d->highlightRangeStart = 0; + emit preferredHighlightBeginChanged(); +} + +qreal QSGGridView::preferredHighlightEnd() const +{ + Q_D(const QSGGridView); + return d->highlightRangeEnd; +} + +void QSGGridView::setPreferredHighlightEnd(qreal end) +{ + Q_D(QSGGridView); + d->highlightRangeEndValid = true; + if (d->highlightRangeEnd == end) + return; + d->highlightRangeEnd = end; + d->haveHighlightRange = d->highlightRange != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; + emit preferredHighlightEndChanged(); +} + +void QSGGridView::resetPreferredHighlightEnd() +{ + Q_D(QSGGridView); + d->highlightRangeEndValid = false; + if (d->highlightRangeEnd == 0) + return; + d->highlightRangeEnd = 0; + emit preferredHighlightEndChanged(); +} + +QSGGridView::HighlightRangeMode QSGGridView::highlightRangeMode() const +{ + Q_D(const QSGGridView); + return d->highlightRange; +} + +void QSGGridView::setHighlightRangeMode(HighlightRangeMode mode) +{ + Q_D(QSGGridView); + if (d->highlightRange == mode) + return; + d->highlightRange = mode; + d->haveHighlightRange = d->highlightRange != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; + emit highlightRangeModeChanged(); +} + +Qt::LayoutDirection QSGGridView::layoutDirection() const +{ + Q_D(const QSGGridView); + return d->layoutDirection; +} + +void QSGGridView::setLayoutDirection(Qt::LayoutDirection layoutDirection) +{ + Q_D(QSGGridView); + if (d->layoutDirection != layoutDirection) { + d->layoutDirection = layoutDirection; + d->regenerate(); + emit layoutDirectionChanged(); + emit effectiveLayoutDirectionChanged(); + } +} + +Qt::LayoutDirection QSGGridView::effectiveLayoutDirection() const +{ + Q_D(const QSGGridView); + if (d->effectiveLayoutMirror) + return d->layoutDirection == Qt::RightToLeft ? Qt::LeftToRight : Qt::RightToLeft; + else + return d->layoutDirection; +} + +QSGGridView::Flow QSGGridView::flow() const +{ + Q_D(const QSGGridView); + return d->flow; +} + +void QSGGridView::setFlow(Flow flow) +{ + Q_D(QSGGridView); + if (d->flow != flow) { + d->flow = flow; + if (d->flow == LeftToRight) { + setContentWidth(-1); + setFlickableDirection(QSGFlickable::VerticalFlick); + } else { + setContentHeight(-1); + setFlickableDirection(QSGFlickable::HorizontalFlick); + } + setContentX(0); + setContentY(0); + d->regenerate(); + emit flowChanged(); + } +} + +bool QSGGridView::isWrapEnabled() const +{ + Q_D(const QSGGridView); + return d->wrap; +} + +void QSGGridView::setWrapEnabled(bool wrap) +{ + Q_D(QSGGridView); + if (d->wrap == wrap) + return; + d->wrap = wrap; + emit keyNavigationWrapsChanged(); +} + +int QSGGridView::cacheBuffer() const +{ + Q_D(const QSGGridView); + return d->buffer; +} + +void QSGGridView::setCacheBuffer(int buffer) +{ + Q_D(QSGGridView); + if (d->buffer != buffer) { + d->buffer = buffer; + if (isComponentComplete()) + refill(); + emit cacheBufferChanged(); + } +} + +int QSGGridView::cellWidth() const +{ + Q_D(const QSGGridView); + return d->cellWidth; +} + +void QSGGridView::setCellWidth(int cellWidth) +{ + Q_D(QSGGridView); + if (cellWidth != d->cellWidth && cellWidth > 0) { + d->cellWidth = qMax(1, cellWidth); + d->updateGrid(); + emit cellWidthChanged(); + d->layout(); + } +} + +int QSGGridView::cellHeight() const +{ + Q_D(const QSGGridView); + return d->cellHeight; +} + +void QSGGridView::setCellHeight(int cellHeight) +{ + Q_D(QSGGridView); + if (cellHeight != d->cellHeight && cellHeight > 0) { + d->cellHeight = qMax(1, cellHeight); + d->updateGrid(); + emit cellHeightChanged(); + d->layout(); + } +} + +QSGGridView::SnapMode QSGGridView::snapMode() const +{ + Q_D(const QSGGridView); + return d->snapMode; +} + +void QSGGridView::setSnapMode(SnapMode mode) +{ + Q_D(QSGGridView); + if (d->snapMode != mode) { + d->snapMode = mode; + emit snapModeChanged(); + } +} + +QDeclarativeComponent *QSGGridView::footer() const +{ + Q_D(const QSGGridView); + return d->footerComponent; +} + +void QSGGridView::setFooter(QDeclarativeComponent *footer) +{ + Q_D(QSGGridView); + if (d->footerComponent != footer) { + if (d->footer) { + // XXX todo - the original did scene()->removeItem(). Why? + d->footer->item->setParentItem(0); + d->footer->item->deleteLater(); + delete d->footer; + d->footer = 0; + } + d->footerComponent = footer; + if (isComponentComplete()) { + d->updateFooter(); + d->updateGrid(); + d->fixupPosition(); + } + emit footerChanged(); + } +} + +QDeclarativeComponent *QSGGridView::header() const +{ + Q_D(const QSGGridView); + return d->headerComponent; +} + +void QSGGridView::setHeader(QDeclarativeComponent *header) +{ + Q_D(QSGGridView); + if (d->headerComponent != header) { + if (d->header) { + // XXX todo - the original did scene()->removeItem(). Why? + d->header->item->setParentItem(0); + d->header->item->deleteLater(); + delete d->header; + d->header = 0; + } + d->headerComponent = header; + if (isComponentComplete()) { + d->updateHeader(); + d->updateFooter(); + d->updateGrid(); + d->fixupPosition(); + } + emit headerChanged(); + } +} + +void QSGGridView::setContentX(qreal pos) +{ + Q_D(QSGGridView); + // Positioning the view manually should override any current movement state + d->moveReason = QSGGridViewPrivate::Other; + QSGFlickable::setContentX(pos); +} + +void QSGGridView::setContentY(qreal pos) +{ + Q_D(QSGGridView); + // Positioning the view manually should override any current movement state + d->moveReason = QSGGridViewPrivate::Other; + QSGFlickable::setContentY(pos); +} + +void QSGGridView::updatePolish() +{ + Q_D(QSGGridView); + QSGFlickable::updatePolish(); + d->layout(); +} + +void QSGGridView::viewportMoved() +{ + Q_D(QSGGridView); + QSGFlickable::viewportMoved(); + if (!d->itemCount) + return; + d->lazyRelease = true; + if (d->flickingHorizontally || d->flickingVertically) { + if (yflick()) { + if (d->vData.velocity > 0) + d->bufferMode = QSGGridViewPrivate::BufferBefore; + else if (d->vData.velocity < 0) + d->bufferMode = QSGGridViewPrivate::BufferAfter; + } + + if (xflick()) { + if (d->hData.velocity > 0) + d->bufferMode = QSGGridViewPrivate::BufferBefore; + else if (d->hData.velocity < 0) + d->bufferMode = QSGGridViewPrivate::BufferAfter; + } + } + refill(); + if (d->flickingHorizontally || d->flickingVertically || d->movingHorizontally || d->movingVertically) + d->moveReason = QSGGridViewPrivate::Mouse; + if (d->moveReason != QSGGridViewPrivate::SetIndex) { + if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange && d->highlight) { + // reposition highlight + qreal pos = d->highlight->rowPos(); + qreal viewPos; + qreal highlightStart; + qreal highlightEnd; + if (d->isRightToLeftTopToBottom()) { + highlightStart = d->highlightRangeStartValid ? d->size()-d->highlightRangeEnd : d->highlightRangeStart; + highlightEnd = d->highlightRangeEndValid ? d->size()-d->highlightRangeStart : d->highlightRangeEnd; + viewPos = -d->position()-d->size(); + } else { + highlightStart = d->highlightRangeStart; + highlightEnd = d->highlightRangeEnd; + viewPos = d->position(); + } + if (pos > viewPos + highlightEnd - d->rowSize()) + pos = viewPos + highlightEnd - d->rowSize(); + if (pos < viewPos + highlightStart) + pos = viewPos + highlightStart; + d->highlight->setPosition(d->highlight->colPos(), qRound(pos)); + + // update current index + int idx = d->snapIndex(); + if (idx >= 0 && idx != d->currentIndex) { + d->updateCurrent(idx); + if (d->currentItem && d->currentItem->colPos() != d->highlight->colPos() && d->autoHighlight) { + if (d->flow == LeftToRight) + d->highlightXAnimator->to = d->currentItem->item->x(); + else + d->highlightYAnimator->to = d->currentItem->item->y(); + } + } + } + } +} + +qreal QSGGridView::minYExtent() const +{ + Q_D(const QSGGridView); + if (d->flow == QSGGridView::TopToBottom) + return QSGFlickable::minYExtent(); + qreal extent = -d->startPosition(); + if (d->header && d->visibleItems.count()) + extent += d->header->item->height(); + if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange) { + extent += d->highlightRangeStart; + extent = qMax(extent, -(d->rowPosAt(0) + d->rowSize() - d->highlightRangeEnd)); + } + return extent; +} + +qreal QSGGridView::maxYExtent() const +{ + Q_D(const QSGGridView); + if (d->flow == QSGGridView::TopToBottom) + return QSGFlickable::maxYExtent(); + qreal extent; + if (!d->model || !d->model->count()) { + extent = 0; + } else if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange) { + extent = -(d->rowPosAt(d->model->count()-1) - d->highlightRangeStart); + if (d->highlightRangeEnd != d->highlightRangeStart) + extent = qMin(extent, -(d->endPosition() - d->highlightRangeEnd + 1)); + } else { + extent = -(d->endPosition() - height()); + } + if (d->footer) + extent -= d->footer->item->height(); + const qreal minY = minYExtent(); + if (extent > minY) + extent = minY; + return extent; +} + +qreal QSGGridView::minXExtent() const +{ + Q_D(const QSGGridView); + if (d->flow == QSGGridView::LeftToRight) + return QSGFlickable::minXExtent(); + qreal extent = -d->startPosition(); + qreal highlightStart; + qreal highlightEnd; + qreal endPositionFirstItem; + if (d->isRightToLeftTopToBottom()) { + endPositionFirstItem = d->rowPosAt(d->model->count()-1); + highlightStart = d->highlightRangeStartValid + ? d->highlightRangeStart - (d->lastPosition()-endPositionFirstItem) + : d->size() - (d->lastPosition()-endPositionFirstItem); + highlightEnd = d->highlightRangeEndValid ? d->highlightRangeEnd : d->size(); + if (d->footer && d->visibleItems.count()) + extent += d->footer->item->width(); + } else { + endPositionFirstItem = d->rowPosAt(0)+d->rowSize(); + highlightStart = d->highlightRangeStart; + highlightEnd = d->highlightRangeEnd; + if (d->header && d->visibleItems.count()) + extent += d->header->item->width(); + } + if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange) { + extent += highlightStart; + extent = qMax(extent, -(endPositionFirstItem - highlightEnd)); + } + return extent; +} + +qreal QSGGridView::maxXExtent() const +{ + Q_D(const QSGGridView); + if (d->flow == QSGGridView::LeftToRight) + return QSGFlickable::maxXExtent(); + qreal extent; + qreal highlightStart; + qreal highlightEnd; + qreal lastItemPosition = 0; + if (d->isRightToLeftTopToBottom()){ + highlightStart = d->highlightRangeStartValid ? d->highlightRangeEnd : d->size(); + highlightEnd = d->highlightRangeEndValid ? d->highlightRangeStart : d->size(); + lastItemPosition = d->endPosition(); + } else { + highlightStart = d->highlightRangeStart; + highlightEnd = d->highlightRangeEnd; + lastItemPosition = 0; + if (d->model && d->model->count()) + lastItemPosition = d->rowPosAt(d->model->count()-1); + } + if (!d->model || !d->model->count()) { + extent = 0; + } else if (d->haveHighlightRange && d->highlightRange == StrictlyEnforceRange) { + extent = -(lastItemPosition - highlightStart); + if (highlightEnd != highlightStart) + extent = d->isRightToLeftTopToBottom() + ? qMax(extent, -(d->endPosition() - highlightEnd + 1)) + : qMin(extent, -(d->endPosition() - highlightEnd + 1)); + } else { + extent = -(d->endPosition() - width()); + } + if (d->isRightToLeftTopToBottom()) { + if (d->header) + extent -= d->header->item->width(); + } else { + if (d->footer) + extent -= d->footer->item->width(); + } + + const qreal minX = minXExtent(); + if (extent > minX) + extent = minX; + return extent; +} + +void QSGGridView::keyPressEvent(QKeyEvent *event) +{ + Q_D(QSGGridView); + if (d->model && d->model->count() && d->interactive) { + d->moveReason = QSGGridViewPrivate::SetIndex; + int oldCurrent = currentIndex(); + switch (event->key()) { + case Qt::Key_Up: + moveCurrentIndexUp(); + break; + case Qt::Key_Down: + moveCurrentIndexDown(); + break; + case Qt::Key_Left: + moveCurrentIndexLeft(); + break; + case Qt::Key_Right: + moveCurrentIndexRight(); + break; + default: + break; + } + if (oldCurrent != currentIndex()) { + event->accept(); + return; + } + } + d->moveReason = QSGGridViewPrivate::Other; + event->ignore(); + QSGFlickable::keyPressEvent(event); +} + +void QSGGridView::moveCurrentIndexUp() +{ + Q_D(QSGGridView); + const int count = d->model ? d->model->count() : 0; + if (!count) + return; + if (d->flow == QSGGridView::LeftToRight) { + if (currentIndex() >= d->columns || d->wrap) { + int index = currentIndex() - d->columns; + setCurrentIndex((index >= 0 && index < count) ? index : count-1); + } + } else { + if (currentIndex() > 0 || d->wrap) { + int index = currentIndex() - 1; + setCurrentIndex((index >= 0 && index < count) ? index : count-1); + } + } +} + +void QSGGridView::moveCurrentIndexDown() +{ + Q_D(QSGGridView); + const int count = d->model ? d->model->count() : 0; + if (!count) + return; + if (d->flow == QSGGridView::LeftToRight) { + if (currentIndex() < count - d->columns || d->wrap) { + int index = currentIndex()+d->columns; + setCurrentIndex((index >= 0 && index < count) ? index : 0); + } + } else { + if (currentIndex() < count - 1 || d->wrap) { + int index = currentIndex() + 1; + setCurrentIndex((index >= 0 && index < count) ? index : 0); + } + } +} + +void QSGGridView::moveCurrentIndexLeft() +{ + Q_D(QSGGridView); + const int count = d->model ? d->model->count() : 0; + if (!count) + return; + if (effectiveLayoutDirection() == Qt::LeftToRight) { + if (d->flow == QSGGridView::LeftToRight) { + if (currentIndex() > 0 || d->wrap) { + int index = currentIndex() - 1; + setCurrentIndex((index >= 0 && index < count) ? index : count-1); + } + } else { + if (currentIndex() >= d->columns || d->wrap) { + int index = currentIndex() - d->columns; + setCurrentIndex((index >= 0 && index < count) ? index : count-1); + } + } + } else { + if (d->flow == QSGGridView::LeftToRight) { + if (currentIndex() < count - 1 || d->wrap) { + int index = currentIndex() + 1; + setCurrentIndex((index >= 0 && index < count) ? index : 0); + } + } else { + if (currentIndex() < count - d->columns || d->wrap) { + int index = currentIndex() + d->columns; + setCurrentIndex((index >= 0 && index < count) ? index : 0); + } + } + } +} + +void QSGGridView::moveCurrentIndexRight() +{ + Q_D(QSGGridView); + const int count = d->model ? d->model->count() : 0; + if (!count) + return; + if (effectiveLayoutDirection() == Qt::LeftToRight) { + if (d->flow == QSGGridView::LeftToRight) { + if (currentIndex() < count - 1 || d->wrap) { + int index = currentIndex() + 1; + setCurrentIndex((index >= 0 && index < count) ? index : 0); + } + } else { + if (currentIndex() < count - d->columns || d->wrap) { + int index = currentIndex()+d->columns; + setCurrentIndex((index >= 0 && index < count) ? index : 0); + } + } + } else { + if (d->flow == QSGGridView::LeftToRight) { + if (currentIndex() > 0 || d->wrap) { + int index = currentIndex() - 1; + setCurrentIndex((index >= 0 && index < count) ? index : count-1); + } + } else { + if (currentIndex() >= d->columns || d->wrap) { + int index = currentIndex() - d->columns; + setCurrentIndex((index >= 0 && index < count) ? index : count-1); + } + } + } +} + +void QSGGridViewPrivate::positionViewAtIndex(int index, int mode) +{ + Q_Q(QSGGridView); + if (!isValid()) + return; + if (mode < QSGGridView::Beginning || mode > QSGGridView::Contain) + return; + + int idx = qMax(qMin(index, model->count()-1), 0); + + if (layoutScheduled) + layout(); + qreal pos = isRightToLeftTopToBottom() ? -position() - size() : position(); + FxGridItemSG *item = visibleItem(idx); + qreal maxExtent; + if (flow == QSGGridView::LeftToRight) + maxExtent = -q->maxYExtent(); + else + maxExtent = isRightToLeftTopToBottom() ? q->minXExtent()-size() : -q->maxXExtent(); + if (!item) { + int itemPos = rowPosAt(idx); + // save the currently visible items in case any of them end up visible again + QList<FxGridItemSG*> oldVisible = visibleItems; + visibleItems.clear(); + visibleIndex = idx - idx % columns; + if (flow == QSGGridView::LeftToRight) + maxExtent = -q->maxYExtent(); + else + maxExtent = isRightToLeftTopToBottom() ? q->minXExtent()-size() : -q->maxXExtent(); + 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) { + qreal itemPos = item->rowPos(); + switch (mode) { + case QSGGridView::Beginning: + pos = itemPos; + if (index < 0 && header) { + pos -= flow == QSGGridView::LeftToRight + ? header->item->height() + : header->item->width(); + } + break; + case QSGGridView::Center: + pos = itemPos - (size() - rowSize())/2; + break; + case QSGGridView::End: + pos = itemPos - size() + rowSize(); + if (index >= model->count() && footer) { + pos += flow == QSGGridView::LeftToRight + ? footer->item->height() + : footer->item->width(); + } + break; + case QSGGridView::Visible: + if (itemPos > pos + size()) + pos = itemPos - size() + rowSize(); + else if (item->endRowPos() < pos) + pos = itemPos; + break; + case QSGGridView::Contain: + if (item->endRowPos() > pos + size()) + pos = itemPos - size() + rowSize(); + if (itemPos < pos) + pos = itemPos; + } + pos = qMin(pos, maxExtent); + qreal minExtent; + if (flow == QSGGridView::LeftToRight) + minExtent = -q->minYExtent(); + else + minExtent = isRightToLeftTopToBottom() ? q->maxXExtent()-size() : -q->minXExtent(); + pos = qMax(pos, minExtent); + moveReason = QSGGridViewPrivate::Other; + q->cancelFlick(); + setPosition(pos); + } + fixupPosition(); +} + +void QSGGridView::positionViewAtIndex(int index, int mode) +{ + Q_D(QSGGridView); + if (!d->isValid() || index < 0 || index >= d->model->count()) + return; + d->positionViewAtIndex(index, mode); +} + +void QSGGridView::positionViewAtBeginning() +{ + Q_D(QSGGridView); + if (!d->isValid()) + return; + d->positionViewAtIndex(-1, Beginning); +} + +void QSGGridView::positionViewAtEnd() +{ + Q_D(QSGGridView); + if (!d->isValid()) + return; + d->positionViewAtIndex(d->model->count(), End); +} + +int QSGGridView::indexAt(qreal x, qreal y) const +{ + Q_D(const QSGGridView); + for (int i = 0; i < d->visibleItems.count(); ++i) { + const FxGridItemSG *listItem = d->visibleItems.at(i); + if(listItem->contains(x, y)) + return listItem->index; + } + + return -1; +} + +void QSGGridView::componentComplete() +{ + Q_D(QSGGridView); + QSGFlickable::componentComplete(); + d->updateHeader(); + d->updateFooter(); + d->updateGrid(); + if (d->isValid()) { + refill(); + d->moveReason = QSGGridViewPrivate::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->colPos(), d->currentItem->rowPos()); + d->updateTrackedItem(); + } + d->moveReason = QSGGridViewPrivate::Other; + d->fixupPosition(); + } +} + +void QSGGridView::trackedPositionChanged() +{ + Q_D(QSGGridView); + if (!d->trackedItem || !d->currentItem) + return; + if (d->moveReason == QSGGridViewPrivate::SetIndex) { + const qreal trackedPos = d->trackedItem->rowPos(); + qreal viewPos; + qreal highlightStart; + qreal highlightEnd; + if (d->isRightToLeftTopToBottom()) { + 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->rowSize()) + pos = trackedPos - highlightEnd + d->rowSize(); + if (trackedPos < pos + highlightStart) + pos = trackedPos - highlightStart; + } else { + if (trackedPos < d->startPosition() + highlightStart) { + pos = d->startPosition(); + } else if (d->trackedItem->endRowPos() > d->endPosition() - d->size() + highlightEnd) { + pos = d->endPosition() - d->size() + 1; + if (pos < d->startPosition()) + pos = d->startPosition(); + } else { + if (trackedPos < viewPos + highlightStart) { + pos = trackedPos - highlightStart; + } else if (trackedPos > viewPos + highlightEnd - d->rowSize()) { + pos = trackedPos - highlightEnd + d->rowSize(); + } + } + } + } else { + if (trackedPos < viewPos && d->currentItem->rowPos() < viewPos) { + pos = qMax(trackedPos, d->currentItem->rowPos()); + } else if (d->trackedItem->endRowPos() >= viewPos + d->size() + && d->currentItem->endRowPos() >= viewPos + d->size()) { + if (d->trackedItem->endRowPos() <= d->currentItem->endRowPos()) { + pos = d->trackedItem->endRowPos() - d->size() + 1; + if (d->rowSize() > d->size()) + pos = trackedPos; + } else { + pos = d->currentItem->endRowPos() - d->size() + 1; + if (d->rowSize() > d->size()) + pos = d->currentItem->rowPos(); + } + } + } + if (viewPos != pos) { + cancelFlick(); + d->calcVelocity = true; + d->setPosition(pos); + d->calcVelocity = false; + } + } +} + +void QSGGridView::itemsInserted(int modelIndex, int count) +{ + Q_D(QSGGridView); + if (!isComponentComplete()) + return; + + 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 (d->visibleItems.at(i)->index + 1 == modelIndex) { + // Special case of appending an item to the model. + index = d->visibleIndex + d->visibleItems.count(); + } else { + if (modelIndex <= d->visibleIndex) { + // Insert before visible items + d->visibleIndex += count; + for (int i = 0; i < d->visibleItems.count(); ++i) { + FxGridItemSG *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; + } + } + + int insertCount = count; + if (index < d->visibleIndex && d->visibleItems.count()) { + insertCount -= d->visibleIndex - index; + index = d->visibleIndex; + modelIndex = d->visibleIndex; + } + + qreal tempPos = d->isRightToLeftTopToBottom() ? -d->position()-d->size()+width()+1 : d->position(); + int to = d->buffer+tempPos+d->size()-1; + int colPos = 0; + int rowPos = 0; + if (d->visibleItems.count()) { + index -= d->visibleIndex; + if (index < d->visibleItems.count()) { + colPos = d->visibleItems.at(index)->colPos(); + rowPos = d->visibleItems.at(index)->rowPos(); + } else { + // appending items to visible list + colPos = d->visibleItems.at(index-1)->colPos() + d->colSize(); + rowPos = d->visibleItems.at(index-1)->rowPos(); + if (colPos > d->colSize() * (d->columns-1)) { + colPos = 0; + rowPos += d->rowSize(); + } + } + } else if (d->itemCount == 0 && d->header) { + rowPos = d->headerSize(); + } + + // Update the indexes of the following visible items. + for (int i = 0; i < d->visibleItems.count(); ++i) { + FxGridItemSG *listItem = d->visibleItems.at(i); + if (listItem->index != -1 && listItem->index >= modelIndex) + listItem->index += count; + } + + bool addedVisible = false; + QList<FxGridItemSG*> added; + int i = 0; + while (i < insertCount && rowPos <= to + d->rowSize()*(d->columns - (colPos/d->colSize()))/qreal(d->columns)) { + if (!addedVisible) { + d->scheduleLayout(); + addedVisible = true; + } + FxGridItemSG *item = d->createItem(modelIndex + i); + d->visibleItems.insert(index, item); + item->setPosition(colPos, rowPos); + added.append(item); + colPos += d->colSize(); + if (colPos > d->colSize() * (d->columns-1)) { + colPos = 0; + rowPos += d->rowSize(); + } + ++index; + ++i; + } + if (i < insertCount) { + // 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()); + } + } + + // update visibleIndex + d->visibleIndex = 0; + for (QList<FxGridItemSG*>::Iterator it = d->visibleItems.begin(); it != d->visibleItems.end(); ++it) { + if ((*it)->index != -1) { + d->visibleIndex = (*it)->index; + break; + } + } + + 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->colPosAt(d->currentIndex), d->rowPosAt(d->currentIndex)); + } + emit currentIndexChanged(); + } else if (d->itemCount == 0 && (!d->currentIndex || (d->currentIndex < 0 && !d->currentIndexCleared))) { + setCurrentIndex(0); + } + + // everything is in order now - emit add() signal + for (int j = 0; j < added.count(); ++j) + added.at(j)->attached->emitAdd(); + + d->itemCount += count; + emit countChanged(); +} + +void QSGGridView::itemsRemoved(int modelIndex, int count) +{ + Q_D(QSGGridView); + if (!isComponentComplete()) + return; + + d->itemCount -= count; + bool currentRemoved = d->currentIndex >= modelIndex && d->currentIndex < modelIndex + count; + bool removedVisible = false; + + // Remove the items from the visible list, skipping anything already marked for removal + QList<FxGridItemSG*>::Iterator it = d->visibleItems.begin(); + while (it != d->visibleItems.end()) { + FxGridItemSG *item = *it; + if (item->index == -1 || item->index < modelIndex) { + // already removed, or before removed items + if (item->index < modelIndex && !removedVisible) { + d->scheduleLayout(); + removedVisible = true; + } + ++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 { + it = d->visibleItems.erase(it); + d->releaseItem(item); + } + } + } + + // fix current + if (d->currentIndex >= modelIndex + count) { + d->currentIndex -= count; + if (d->currentItem) + d->currentItem->index -= count; + emit currentIndexChanged(); + } else if (currentRemoved) { + // current item has been removed. + d->releaseItem(d->currentItem); + d->currentItem = 0; + d->currentIndex = -1; + if (d->itemCount) + d->updateCurrent(qMin(modelIndex, d->itemCount-1)); + else + emit currentIndexChanged(); + } + + // update visibleIndex + d->visibleIndex = 0; + for (it = d->visibleItems.begin(); it != d->visibleItems.end(); ++it) { + if ((*it)->index != -1) { + d->visibleIndex = (*it)->index; + break; + } + } + + if (removedVisible && d->visibleItems.isEmpty()) { + d->timeline.clear(); + if (d->itemCount == 0) { + d->setPosition(0); + d->updateHeader(); + d->updateFooter(); + } + } + + emit countChanged(); +} + +void QSGGridView::destroyRemoved() +{ + Q_D(QSGGridView); + for (QList<FxGridItemSG*>::Iterator it = d->visibleItems.begin(); + it != d->visibleItems.end();) { + FxGridItemSG *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->layout(); +} + +void QSGGridView::itemsMoved(int from, int to, int count) +{ + Q_D(QSGGridView); + if (!isComponentComplete()) + return; + QHash<int,FxGridItemSG*> moved; + + FxGridItemSG *firstItem = d->firstVisibleItem(); + + QList<FxGridItemSG*>::Iterator it = d->visibleItems.begin(); + while (it != d->visibleItems.end()) { + FxGridItemSG *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); + it = d->visibleItems.erase(it); + } else { + if (item->index > from && item->index != -1) { + // move everything after the moved items. + item->index -= count; + if (item->index < d->visibleIndex) + d->visibleIndex = item->index; + } + ++it; + } + } + + int remaining = count; + int endIndex = d->visibleIndex; + it = d->visibleItems.begin(); + while (it != d->visibleItems.end()) { + FxGridItemSG *item = *it; + if (remaining && item->index >= to && item->index < to + count) { + // place items in the target position, reusing any existing items + FxGridItemSG *movedItem = moved.take(item->index); + if (!movedItem) + movedItem = d->createItem(item->index); + it = d->visibleItems.insert(it, movedItem); + if (it == d->visibleItems.begin() && firstItem) + movedItem->setPosition(firstItem->colPos(), firstItem->rowPos()); + ++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 (FxGridItemSG *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(); + FxGridItemSG *item = moved.take(idx); + if (d->currentItem && item->item == d->currentItem->item) + item->setPosition(d->colPosAt(idx), d->rowPosAt(idx)); + d->releaseItem(item); + } + + d->layout(); +} + +void QSGGridView::modelReset() +{ + Q_D(QSGGridView); + d->clear(); + refill(); + d->moveReason = QSGGridViewPrivate::SetIndex; + d->updateCurrent(d->currentIndex); + if (d->highlight && d->currentItem) { + if (d->autoHighlight) + d->highlight->setPosition(d->currentItem->colPos(), d->currentItem->rowPos()); + d->updateTrackedItem(); + } + d->moveReason = QSGGridViewPrivate::Other; + + emit countChanged(); +} + +void QSGGridView::createdItem(int index, QSGItem *item) +{ + Q_D(QSGGridView); + if (d->requestedIndex != index) { + item->setParentItem(this); + d->unrequestedItems.insert(item, index); + if (d->flow == QSGGridView::LeftToRight) { + item->setPos(QPointF(d->colPosAt(index), d->rowPosAt(index))); + } else { + item->setPos(QPointF(d->rowPosAt(index), d->colPosAt(index))); + } + } +} + +void QSGGridView::destroyingItem(QSGItem *item) +{ + Q_D(QSGGridView); + d->unrequestedItems.remove(item); +} + +void QSGGridView::animStopped() +{ + Q_D(QSGGridView); + d->bufferMode = QSGGridViewPrivate::NoBuffer; + if (d->haveHighlightRange && d->highlightRange == QSGGridView::StrictlyEnforceRange) + d->updateHighlight(); +} + +void QSGGridView::refill() +{ + Q_D(QSGGridView); + if (d->isRightToLeftTopToBottom()) + d->refill(-d->position()-d->size()+1, -d->position()); + else + d->refill(d->position(), d->position()+d->size()-1); +} + + +QSGGridViewAttached *QSGGridView::qmlAttachedProperties(QObject *obj) +{ + return new QSGGridViewAttached(obj); +} + +QT_END_NAMESPACE |