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Diffstat (limited to 'src/declarative/items/qquickpathview.cpp')
| -rw-r--r-- | src/declarative/items/qquickpathview.cpp | 1781 |
1 files changed, 0 insertions, 1781 deletions
diff --git a/src/declarative/items/qquickpathview.cpp b/src/declarative/items/qquickpathview.cpp deleted file mode 100644 index f262562edf..0000000000 --- a/src/declarative/items/qquickpathview.cpp +++ /dev/null @@ -1,1781 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_BEGIN_LICENSE:LGPL$ -** 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 "qquickpathview_p.h" -#include "qquickpathview_p_p.h" -#include "qquickcanvas.h" - -#include <private/qdeclarativestate_p.h> -#include <private/qdeclarativeopenmetaobject_p.h> -#include <private/qlistmodelinterface_p.h> -#include <private/qdeclarativechangeset_p.h> - -#include <QtGui/qevent.h> -#include <QtGui/qevent.h> -#include <QtGui/qguiapplication.h> -#include <QtGui/qstylehints.h> -#include <QtCore/qmath.h> -#include <math.h> - -QT_BEGIN_NAMESPACE - -inline qreal qmlMod(qreal x, qreal y) -{ -#ifdef QT_USE_MATH_H_FLOATS - if (sizeof(qreal) == sizeof(float)) - return fmodf(float(x), float(y)); - else -#endif - return fmod(x, y); -} - -static QDeclarativeOpenMetaObjectType *qPathViewAttachedType = 0; - -QQuickPathViewAttached::QQuickPathViewAttached(QObject *parent) -: QObject(parent), m_percent(-1), m_view(0), m_onPath(false), m_isCurrent(false) -{ - if (qPathViewAttachedType) { - m_metaobject = new QDeclarativeOpenMetaObject(this, qPathViewAttachedType); - m_metaobject->setCached(true); - } else { - m_metaobject = new QDeclarativeOpenMetaObject(this); - } -} - -QQuickPathViewAttached::~QQuickPathViewAttached() -{ -} - -QVariant QQuickPathViewAttached::value(const QByteArray &name) const -{ - return m_metaobject->value(name); -} -void QQuickPathViewAttached::setValue(const QByteArray &name, const QVariant &val) -{ - m_metaobject->setValue(name, val); -} - - -void QQuickPathViewPrivate::init() -{ - Q_Q(QQuickPathView); - offset = 0; - q->setAcceptedMouseButtons(Qt::LeftButton); - q->setFlag(QQuickItem::ItemIsFocusScope); - q->setFiltersChildMouseEvents(true); - FAST_CONNECT(&tl, SIGNAL(updated()), q, SLOT(ticked())) - lastPosTime.invalidate(); - FAST_CONNECT(&tl, SIGNAL(completed()), q, SLOT(movementEnding())) -} - -QQuickItem *QQuickPathViewPrivate::getItem(int modelIndex, qreal z, bool onPath) -{ - Q_Q(QQuickPathView); - requestedIndex = modelIndex; - requestedOnPath = onPath; - requestedZ = z; - inRequest = true; - QQuickItem *item = model->item(modelIndex, false); - if (item) { - QDeclarative_setParent_noEvent(item, q); - item->setParentItem(q); - requestedIndex = -1; - qPathViewAttachedType = attType; - QQuickPathViewAttached *att = static_cast<QQuickPathViewAttached *>(qmlAttachedPropertiesObject<QQuickPathView>(item)); - qPathViewAttachedType = 0; - if (att) - att->setOnPath(onPath); - QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); - itemPrivate->addItemChangeListener(this, QQuickItemPrivate::Geometry); - } - inRequest = false; - return item; -} - -void QQuickPathView::createdItem(int index, QQuickItem *item) -{ - Q_D(QQuickPathView); - if (d->requestedIndex != index) { - qPathViewAttachedType = d->attachedType(); - QQuickPathViewAttached *att = static_cast<QQuickPathViewAttached *>(qmlAttachedPropertiesObject<QQuickPathView>(item)); - qPathViewAttachedType = 0; - if (att) { - att->m_view = this; - att->setOnPath(false); - } - item->setParentItem(this); - QDeclarative_setParent_noEvent(item, this); - d->updateItem(item, index < d->firstIndex ? 0.0 : 1.0); - } else { - d->requestedIndex = -1; - if (!d->inRequest) - refill(); - } -} - -void QQuickPathView::initItem(int index, QQuickItem *item) -{ - Q_D(QQuickPathView); - if (d->requestedIndex == index) { - item->setParentItem(this); - qPathViewAttachedType = d->attachedType(); - QQuickPathViewAttached *att = static_cast<QQuickPathViewAttached *>(qmlAttachedPropertiesObject<QQuickPathView>(item)); - qPathViewAttachedType = 0; - if (att) { - att->m_view = this; - qreal percent = d->positionOfIndex(index); - foreach (const QString &attr, d->path->attributes()) - att->setValue(attr.toUtf8(), d->path->attributeAt(attr, percent)); - item->setZ(d->requestedZ); - if (att) - att->setOnPath(d->requestedOnPath); - } - } -} - -void QQuickPathViewPrivate::releaseItem(QQuickItem *item) -{ - if (!item || !model) - return; - QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); - itemPrivate->removeItemChangeListener(this, QQuickItemPrivate::Geometry); - if (model->release(item) == 0) { - // item was not destroyed, and we no longer reference it. - if (QQuickPathViewAttached *att = attached(item)) - att->setOnPath(false); - } -} - -QQuickPathViewAttached *QQuickPathViewPrivate::attached(QQuickItem *item) -{ - return static_cast<QQuickPathViewAttached *>(qmlAttachedPropertiesObject<QQuickPathView>(item, false)); -} - -QDeclarativeOpenMetaObjectType *QQuickPathViewPrivate::attachedType() -{ - Q_Q(QQuickPathView); - if (!attType) { - // pre-create one metatype to share with all attached objects - attType = new QDeclarativeOpenMetaObjectType(&QQuickPathViewAttached::staticMetaObject, qmlEngine(q)); - foreach (const QString &attr, path->attributes()) - attType->createProperty(attr.toUtf8()); - } - - return attType; -} - -void QQuickPathViewPrivate::clear() -{ - if (currentItem) { - releaseItem(currentItem); - currentItem = 0; - } - for (int i=0; i<items.count(); i++){ - QQuickItem *p = items[i]; - releaseItem(p); - } - items.clear(); -} - -void QQuickPathViewPrivate::updateMappedRange() -{ - if (model && pathItems != -1 && pathItems < modelCount) - mappedRange = qreal(pathItems)/modelCount; - else - mappedRange = 1.0; -} - -qreal QQuickPathViewPrivate::positionOfIndex(qreal index) const -{ - qreal pos = -1.0; - - if (model && index >= 0 && index < modelCount) { - qreal start = 0.0; - if (haveHighlightRange && highlightRangeMode != QQuickPathView::NoHighlightRange) - start = highlightRangeStart; - qreal globalPos = index + offset; - globalPos = qmlMod(globalPos, qreal(modelCount)) / modelCount; - if (pathItems != -1 && pathItems < modelCount) { - globalPos += start * mappedRange; - globalPos = qmlMod(globalPos, 1.0); - if (globalPos < mappedRange) - pos = globalPos / mappedRange; - } else { - pos = qmlMod(globalPos + start, 1.0); - } - } - - return pos; -} - -void QQuickPathViewPrivate::createHighlight() -{ - Q_Q(QQuickPathView); - if (!q->isComponentComplete()) - return; - - bool changed = false; - if (highlightItem) { - highlightItem->setParentItem(0); - highlightItem->deleteLater(); - highlightItem = 0; - changed = true; - } - - QQuickItem *item = 0; - if (highlightComponent) { - QDeclarativeContext *creationContext = highlightComponent->creationContext(); - QDeclarativeContext *highlightContext = new QDeclarativeContext( - creationContext ? creationContext : qmlContext(q)); - QObject *nobj = highlightComponent->create(highlightContext); - if (nobj) { - QDeclarative_setParent_noEvent(highlightContext, nobj); - item = qobject_cast<QQuickItem *>(nobj); - if (!item) - delete nobj; - } else { - delete highlightContext; - } - } else { - item = new QQuickItem; - } - if (item) { - QDeclarative_setParent_noEvent(item, q); - item->setParentItem(q); - highlightItem = item; - changed = true; - } - if (changed) - emit q->highlightItemChanged(); -} - -void QQuickPathViewPrivate::updateHighlight() -{ - Q_Q(QQuickPathView); - if (!q->isComponentComplete() || !isValid()) - return; - if (highlightItem) { - if (haveHighlightRange && highlightRangeMode == QQuickPathView::StrictlyEnforceRange) { - updateItem(highlightItem, highlightRangeStart); - } else { - qreal target = currentIndex; - - offsetAdj = 0.0; - tl.reset(moveHighlight); - moveHighlight.setValue(highlightPosition); - - const int duration = highlightMoveDuration; - - if (target - highlightPosition > modelCount/2) { - highlightUp = false; - qreal distance = modelCount - target + highlightPosition; - tl.move(moveHighlight, 0.0, QEasingCurve(QEasingCurve::InQuad), int(duration * highlightPosition / distance)); - tl.set(moveHighlight, modelCount-0.01); - tl.move(moveHighlight, target, QEasingCurve(QEasingCurve::OutQuad), int(duration * (modelCount-target) / distance)); - } else if (target - highlightPosition <= -modelCount/2) { - highlightUp = true; - qreal distance = modelCount - highlightPosition + target; - tl.move(moveHighlight, modelCount-0.01, QEasingCurve(QEasingCurve::InQuad), int(duration * (modelCount-highlightPosition) / distance)); - tl.set(moveHighlight, 0.0); - tl.move(moveHighlight, target, QEasingCurve(QEasingCurve::OutQuad), int(duration * target / distance)); - } else { - highlightUp = highlightPosition - target < 0; - tl.move(moveHighlight, target, QEasingCurve(QEasingCurve::InOutQuad), duration); - } - } - } -} - -void QQuickPathViewPrivate::setHighlightPosition(qreal pos) -{ - if (pos != highlightPosition) { - qreal start = 0.0; - qreal end = 1.0; - if (haveHighlightRange && highlightRangeMode != QQuickPathView::NoHighlightRange) { - start = highlightRangeStart; - end = highlightRangeEnd; - } - - qreal range = qreal(modelCount); - // calc normalized position of highlight relative to offset - qreal relativeHighlight = qmlMod(pos + offset, range) / range; - - if (!highlightUp && relativeHighlight > end * mappedRange) { - qreal diff = 1.0 - relativeHighlight; - setOffset(offset + diff * range); - } else if (highlightUp && relativeHighlight >= (end - start) * mappedRange) { - qreal diff = relativeHighlight - (end - start) * mappedRange; - setOffset(offset - diff * range - 0.00001); - } - - highlightPosition = pos; - qreal pathPos = positionOfIndex(pos); - updateItem(highlightItem, pathPos); - if (QQuickPathViewAttached *att = attached(highlightItem)) - att->setOnPath(pathPos != -1.0); - } -} - -void QQuickPathView::pathUpdated() -{ - Q_D(QQuickPathView); - QList<QQuickItem*>::iterator it = d->items.begin(); - while (it != d->items.end()) { - QQuickItem *item = *it; - if (QQuickPathViewAttached *att = d->attached(item)) - att->m_percent = -1; - ++it; - } - refill(); -} - -void QQuickPathViewPrivate::updateItem(QQuickItem *item, qreal percent) -{ - if (QQuickPathViewAttached *att = attached(item)) { - if (qFuzzyCompare(att->m_percent, percent)) - return; - att->m_percent = percent; - foreach (const QString &attr, path->attributes()) - att->setValue(attr.toUtf8(), path->attributeAt(attr, percent)); - } - QPointF pf = path->pointAt(percent); - item->setX(qRound(pf.x() - item->width()/2)); - item->setY(qRound(pf.y() - item->height()/2)); -} - -void QQuickPathViewPrivate::regenerate() -{ - Q_Q(QQuickPathView); - if (!q->isComponentComplete()) - return; - - clear(); - - if (!isValid()) - return; - - firstIndex = -1; - updateMappedRange(); - q->refill(); -} - -/*! - \qmlclass PathView QQuickPathView - \inqmlmodule QtQuick 2 - \ingroup qml-view-elements - \brief The PathView element lays out model-provided items on a path. - \inherits Item - - A PathView 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. - - The view has a \l model, which defines the data to be displayed, and - a \l delegate, which defines how the data should be displayed. - The \l delegate is instantiated for each item on the \l path. - The items may be flicked to move them along the path. - - For example, if there is a simple list model defined in a file \c ContactModel.qml like this: - - \snippet doc/src/snippets/declarative/pathview/ContactModel.qml 0 - - This data can be represented as a PathView, like this: - - \snippet doc/src/snippets/declarative/pathview/pathview.qml 0 - - \image pathview.gif - - (Note the above example uses PathAttribute to scale and modify the - opacity of the items as they rotate. This additional code can be seen in the - PathAttribute documentation.) - - PathView does not automatically handle keyboard navigation. This is because - the keys to use for navigation will depend upon the shape of the path. Navigation - can be added quite simply by setting \c focus to \c true and calling - \l decrementCurrentIndex() or \l incrementCurrentIndex(), for example to navigate - using the left and right arrow keys: - - \qml - PathView { - // ... - focus: true - Keys.onLeftPressed: decrementCurrentIndex() - Keys.onRightPressed: incrementCurrentIndex() - } - \endqml - - The path 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. - - PathView attaches a number of properties to the root item of the delegate, for example - \c {PathView.isCurrentItem}. In the following example, the root delegate item can access - this attached property directly as \c PathView.isCurrentItem, while the child - \c nameText object must refer to this property as \c wrapper.PathView.isCurrentItem. - - \snippet doc/src/snippets/declarative/pathview/pathview.qml 1 - - \bold Note that 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 Path, {declarative/modelviews/pathview}{PathView example} -*/ - -QQuickPathView::QQuickPathView(QQuickItem *parent) - : QQuickItem(*(new QQuickPathViewPrivate), parent) -{ - Q_D(QQuickPathView); - d->init(); -} - -QQuickPathView::~QQuickPathView() -{ - Q_D(QQuickPathView); - d->clear(); - if (d->attType) - d->attType->release(); - if (d->ownModel) - delete d->model; -} - -/*! - \qmlattachedproperty PathView QtQuick2::PathView::view - This attached property holds the view that manages this delegate instance. - - It is attached to each instance of the delegate. -*/ - -/*! - \qmlattachedproperty bool QtQuick2::PathView::onPath - This attached property holds whether the item is currently on the path. - - If a pathItemCount has been set, it is possible that some items may - be instantiated, but not considered to be currently on the path. - Usually, these items would be set invisible, for example: - - \qml - Component { - Rectangle { - visible: PathView.onPath - // ... - } - } - \endqml - - It is attached to each instance of the delegate. -*/ - -/*! - \qmlattachedproperty bool QtQuick2::PathView::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. - - \snippet doc/src/snippets/declarative/pathview/pathview.qml 1 -*/ - -/*! - \qmlproperty model QtQuick2::PathView::model - This property holds the model providing data for the view. - - The model provides a set of data that is used to create the items for the view. - For large or dynamic datasets the model is usually provided by a C++ model object. - Models can also be created directly in QML, using the ListModel element. - - \sa {qmlmodels}{Data Models} -*/ -QVariant QQuickPathView::model() const -{ - Q_D(const QQuickPathView); - return d->modelVariant; -} - -void QQuickPathView::setModel(const QVariant &model) -{ - Q_D(QQuickPathView); - if (d->modelVariant == model) - return; - - if (d->model) { - disconnect(d->model, SIGNAL(modelUpdated(QDeclarativeChangeSet,bool)), - this, SLOT(modelUpdated(QDeclarativeChangeSet,bool))); - disconnect(d->model, SIGNAL(createdItem(int,QQuickItem*)), this, SLOT(createdItem(int,QQuickItem*))); - disconnect(d->model, SIGNAL(initItem(int,QQuickItem*)), this, SLOT(initItem(int,QQuickItem*))); - for (int i=0; i<d->items.count(); i++){ - QQuickItem *p = d->items[i]; - d->releaseItem(p); - } - d->items.clear(); - } - - d->modelVariant = model; - QObject *object = qvariant_cast<QObject*>(model); - QQuickVisualModel *vim = 0; - if (object && (vim = qobject_cast<QQuickVisualModel *>(object))) { - if (d->ownModel) { - delete d->model; - d->ownModel = false; - } - d->model = vim; - } else { - if (!d->ownModel) { - d->model = new QQuickVisualDataModel(qmlContext(this)); - d->ownModel = true; - if (isComponentComplete()) - static_cast<QQuickVisualDataModel *>(d->model.data())->componentComplete(); - } - if (QQuickVisualDataModel *dataModel = qobject_cast<QQuickVisualDataModel*>(d->model)) - dataModel->setModel(model); - } - d->modelCount = 0; - if (d->model) { - connect(d->model, SIGNAL(modelUpdated(QDeclarativeChangeSet,bool)), - this, SLOT(modelUpdated(QDeclarativeChangeSet,bool))); - connect(d->model, SIGNAL(createdItem(int,QQuickItem*)), this, SLOT(createdItem(int,QQuickItem*))); - connect(d->model, SIGNAL(initItem(int,QQuickItem*)), this, SLOT(initItem(int,QQuickItem*))); - d->modelCount = d->model->count(); - if (d->model->count()) - d->offset = qmlMod(d->offset, qreal(d->model->count())); - if (d->offset < 0) - d->offset = d->model->count() + d->offset; -} - d->regenerate(); - if (d->currentIndex < d->modelCount) - setOffset(qmlMod(d->modelCount - d->currentIndex, d->modelCount)); - else - d->fixOffset(); - emit countChanged(); - emit modelChanged(); -} - -/*! - \qmlproperty int QtQuick2::PathView::count - This property holds the number of items in the model. -*/ -int QQuickPathView::count() const -{ - Q_D(const QQuickPathView); - return d->model ? d->modelCount : 0; -} - -/*! - \qmlproperty Path QtQuick2::PathView::path - This property holds the path used to lay out the items. - For more information see the \l Path documentation. -*/ -QDeclarativePath *QQuickPathView::path() const -{ - Q_D(const QQuickPathView); - return d->path; -} - -void QQuickPathView::setPath(QDeclarativePath *path) -{ - Q_D(QQuickPathView); - if (d->path == path) - return; - if (d->path) - disconnect(d->path, SIGNAL(changed()), this, SLOT(pathUpdated())); - d->path = path; - connect(d->path, SIGNAL(changed()), this, SLOT(pathUpdated())); - if (d->isValid() && isComponentComplete()) { - d->clear(); - if (d->attType) { - d->attType->release(); - d->attType = 0; - } - d->regenerate(); - } - emit pathChanged(); -} - -/*! - \qmlproperty int QtQuick2::PathView::currentIndex - This property holds the index of the current item. -*/ -int QQuickPathView::currentIndex() const -{ - Q_D(const QQuickPathView); - return d->currentIndex; -} - -void QQuickPathView::setCurrentIndex(int idx) -{ - Q_D(QQuickPathView); - if (d->model && d->modelCount) - idx = qAbs(idx % d->modelCount); - if (d->model && (idx != d->currentIndex || !d->currentItem)) { - if (d->currentItem) { - if (QQuickPathViewAttached *att = d->attached(d->currentItem)) - att->setIsCurrentItem(false); - d->releaseItem(d->currentItem); - } - int oldCurrentIdx = d->currentIndex; - QQuickItem *oldCurrentItem = d->currentItem; - d->currentItem = 0; - d->moveReason = QQuickPathViewPrivate::SetIndex; - d->currentIndex = idx; - if (d->modelCount) { - d->createCurrentItem(); - if (d->haveHighlightRange && d->highlightRangeMode == QQuickPathView::StrictlyEnforceRange) - d->snapToCurrent(); - d->currentItemOffset = d->positionOfIndex(d->currentIndex); - d->updateHighlight(); - } - if (oldCurrentIdx != d->currentIndex) - emit currentIndexChanged(); - if (oldCurrentItem != d->currentItem) - emit currentItemChanged(); - } -} - -QQuickItem *QQuickPathView::currentItem() const -{ - Q_D(const QQuickPathView); - return d->currentItem; -} - -/*! - \qmlmethod QtQuick2::PathView::incrementCurrentIndex() - - Increments the current index. - - \bold Note: methods should only be called after the Component has completed. -*/ -void QQuickPathView::incrementCurrentIndex() -{ - Q_D(QQuickPathView); - d->moveDirection = QQuickPathViewPrivate::Positive; - setCurrentIndex(currentIndex()+1); -} - -/*! - \qmlmethod QtQuick2::PathView::decrementCurrentIndex() - - Decrements the current index. - - \bold Note: methods should only be called after the Component has completed. -*/ -void QQuickPathView::decrementCurrentIndex() -{ - Q_D(QQuickPathView); - if (d->model && d->modelCount) { - int idx = currentIndex()-1; - if (idx < 0) - idx = d->modelCount - 1; - d->moveDirection = QQuickPathViewPrivate::Negative; - setCurrentIndex(idx); - } -} - -/*! - \qmlproperty real QtQuick2::PathView::offset - - The offset specifies how far along the path the items are from their initial positions. - This is a real number that ranges from 0.0 to the count of items in the model. -*/ -qreal QQuickPathView::offset() const -{ - Q_D(const QQuickPathView); - return d->offset; -} - -void QQuickPathView::setOffset(qreal offset) -{ - Q_D(QQuickPathView); - d->setOffset(offset); - d->updateCurrent(); -} - -void QQuickPathViewPrivate::setOffset(qreal o) -{ - Q_Q(QQuickPathView); - if (offset != o) { - if (isValid() && q->isComponentComplete()) { - offset = qmlMod(o, qreal(modelCount)); - if (offset < 0) - offset += qreal(modelCount); - q->refill(); - } else { - offset = o; - } - emit q->offsetChanged(); - } -} - -void QQuickPathViewPrivate::setAdjustedOffset(qreal o) -{ - setOffset(o+offsetAdj); -} - -/*! - \qmlproperty Component QtQuick2::PathView::highlight - This property holds the component to use as the highlight. - - An instance of the highlight component will be created for each view. - The geometry of the resultant component instance will be managed by the view - so as to stay with the current item. - - The below example demonstrates how to make a simple highlight. Note the use - of the \l{PathView::onPath}{PathView.onPath} attached property to ensure that - the highlight is hidden when flicked away from the path. - - \qml - Component { - Rectangle { - visible: PathView.onPath - // ... - } - } - \endqml - - \sa highlightItem, highlightRangeMode -*/ - -QDeclarativeComponent *QQuickPathView::highlight() const -{ - Q_D(const QQuickPathView); - return d->highlightComponent; -} - -void QQuickPathView::setHighlight(QDeclarativeComponent *highlight) -{ - Q_D(QQuickPathView); - if (highlight != d->highlightComponent) { - d->highlightComponent = highlight; - d->createHighlight(); - d->updateHighlight(); - emit highlightChanged(); - } -} - -/*! - \qmlproperty Item QtQuick2::PathView::highlightItem - - \c highlightItem holds the highlight item, which was created - from the \l highlight component. - - \sa highlight -*/ -QQuickItem *QQuickPathView::highlightItem() -{ - Q_D(const QQuickPathView); - return d->highlightItem; -} -/*! - \qmlproperty real QtQuick2::PathView::preferredHighlightBegin - \qmlproperty real QtQuick2::PathView::preferredHighlightEnd - \qmlproperty enumeration QtQuick2::PathView::highlightRangeMode - - These properties set the preferred range of the highlight (current item) - within the view. The preferred values must be in the range 0.0-1.0. - - If highlightRangeMode is set to \e PathView.NoHighlightRange - - If highlightRangeMode is set to \e PathView.ApplyRange the view will - attempt to maintain the highlight within the range, however - the highlight can move outside of the range at the ends of the path - or due to a mouse interaction. - - If highlightRangeMode is set to \e PathView.StrictlyEnforceRange the highlight will never - move outside of the range. This means that the current item will change - if a keyboard or mouse action would cause the highlight to move - outside of the range. - - Note that this is the correct way to influence where the - current item ends up when the view moves. For example, if you want the - currently selected item to be in the middle of the path, then set the - highlight range to be 0.5,0.5 and highlightRangeMode to PathView.StrictlyEnforceRange. - Then, when the path scrolls, - the currently selected item will be the item at that position. This also applies to - when the currently selected item changes - it will scroll to within the preferred - highlight range. Furthermore, the behaviour of the current item index will occur - whether or not a highlight exists. - - The default value is \e PathView.StrictlyEnforceRange. - - Note that a valid range requires preferredHighlightEnd to be greater - than or equal to preferredHighlightBegin. -*/ -qreal QQuickPathView::preferredHighlightBegin() const -{ - Q_D(const QQuickPathView); - return d->highlightRangeStart; -} - -void QQuickPathView::setPreferredHighlightBegin(qreal start) -{ - Q_D(QQuickPathView); - if (d->highlightRangeStart == start || start < 0 || start > 1.0) - return; - d->highlightRangeStart = start; - d->haveHighlightRange = d->highlightRangeMode != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; - refill(); - emit preferredHighlightBeginChanged(); -} - -qreal QQuickPathView::preferredHighlightEnd() const -{ - Q_D(const QQuickPathView); - return d->highlightRangeEnd; -} - -void QQuickPathView::setPreferredHighlightEnd(qreal end) -{ - Q_D(QQuickPathView); - if (d->highlightRangeEnd == end || end < 0 || end > 1.0) - return; - d->highlightRangeEnd = end; - d->haveHighlightRange = d->highlightRangeMode != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; - refill(); - emit preferredHighlightEndChanged(); -} - -QQuickPathView::HighlightRangeMode QQuickPathView::highlightRangeMode() const -{ - Q_D(const QQuickPathView); - return d->highlightRangeMode; -} - -void QQuickPathView::setHighlightRangeMode(HighlightRangeMode mode) -{ - Q_D(QQuickPathView); - if (d->highlightRangeMode == mode) - return; - d->highlightRangeMode = mode; - d->haveHighlightRange = d->highlightRangeMode != NoHighlightRange && d->highlightRangeStart <= d->highlightRangeEnd; - if (d->haveHighlightRange) { - d->regenerate(); - d->snapToCurrent(); - } - emit highlightRangeModeChanged(); -} - -/*! - \qmlproperty int QtQuick2::PathView::highlightMoveDuration - This property holds the move animation duration of the highlight delegate. - - If the highlightRangeMode is StrictlyEnforceRange then this property - determines the speed that the items move along the path. - - The default value for the duration is 300ms. -*/ -int QQuickPathView::highlightMoveDuration() const -{ - Q_D(const QQuickPathView); - return d->highlightMoveDuration; -} - -void QQuickPathView::setHighlightMoveDuration(int duration) -{ - Q_D(QQuickPathView); - if (d->highlightMoveDuration == duration) - return; - d->highlightMoveDuration = duration; - emit highlightMoveDurationChanged(); -} - -/*! - \qmlproperty real QtQuick2::PathView::dragMargin - This property holds the maximum distance from the path that initiate mouse dragging. - - By default the path can only be dragged by clicking on an item. If - dragMargin is greater than zero, a drag can be initiated by clicking - within dragMargin pixels of the path. -*/ -qreal QQuickPathView::dragMargin() const -{ - Q_D(const QQuickPathView); - return d->dragMargin; -} - -void QQuickPathView::setDragMargin(qreal dragMargin) -{ - Q_D(QQuickPathView); - if (d->dragMargin == dragMargin) - return; - d->dragMargin = dragMargin; - emit dragMarginChanged(); -} - -/*! - \qmlproperty real QtQuick2::PathView::flickDeceleration - This property holds the rate at which a flick will decelerate. - - The default is 100. -*/ -qreal QQuickPathView::flickDeceleration() const -{ - Q_D(const QQuickPathView); - return d->deceleration; -} - -void QQuickPathView::setFlickDeceleration(qreal dec) -{ - Q_D(QQuickPathView); - if (d->deceleration == dec) - return; - d->deceleration = dec; - emit flickDecelerationChanged(); -} - -/*! - \qmlproperty bool QtQuick2::PathView::interactive - - A user cannot drag or flick a PathView that is not interactive. - - This property is useful for temporarily disabling flicking. This allows - special interaction with PathView's children. -*/ -bool QQuickPathView::isInteractive() const -{ - Q_D(const QQuickPathView); - return d->interactive; -} - -void QQuickPathView::setInteractive(bool interactive) -{ - Q_D(QQuickPathView); - if (interactive != d->interactive) { - d->interactive = interactive; - if (!interactive) - d->tl.clear(); - emit interactiveChanged(); - } -} - -/*! - \qmlproperty bool QtQuick2::PathView::moving - - This property holds whether the view is currently moving - due to the user either dragging or flicking the view. -*/ -bool QQuickPathView::isMoving() const -{ - Q_D(const QQuickPathView); - return d->moving; -} - -/*! - \qmlproperty bool QtQuick2::PathView::flicking - - This property holds whether the view is currently moving - due to the user flicking the view. -*/ -bool QQuickPathView::isFlicking() const -{ - Q_D(const QQuickPathView); - return d->flicking; -} - -/*! - \qmlsignal QtQuick2::PathView::onMovementStarted() - - This handler is called when the view begins moving due to user - interaction. -*/ - -/*! - \qmlsignal QtQuick2::PathView::onMovementEnded() - - This handler is called when the view stops moving due to user - interaction. If a flick was generated, this handler will - be triggered once the flick stops. If a flick was not - generated, the handler will be triggered when the - user stops dragging - i.e. a mouse or touch release. -*/ - -/*! - \qmlsignal QtQuick2::PathView::onFlickStarted() - - This handler is called when the view is flicked. A flick - starts from the point that the mouse or touch is released, - while still in motion. -*/ - -/*! - \qmlsignal QtQuick2::PathView::onFlickEnded() - - This handler is called when the view stops moving due to a flick. -*/ - -/*! - \qmlproperty Component QtQuick2::PathView::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 when pathItemCount is specified. 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. - - Note that the PathView will layout the items based on the size of the root - item in the delegate. - - Here is an example delegate: - \snippet doc/src/snippets/declarative/pathview/pathview.qml 1 -*/ -QDeclarativeComponent *QQuickPathView::delegate() const -{ - Q_D(const QQuickPathView); - if (d->model) { - if (QQuickVisualDataModel *dataModel = qobject_cast<QQuickVisualDataModel*>(d->model)) - return dataModel->delegate(); - } - - return 0; -} - -void QQuickPathView::setDelegate(QDeclarativeComponent *delegate) -{ - Q_D(QQuickPathView); - if (delegate == this->delegate()) - return; - if (!d->ownModel) { - d->model = new QQuickVisualDataModel(qmlContext(this)); - d->ownModel = true; - } - if (QQuickVisualDataModel *dataModel = qobject_cast<QQuickVisualDataModel*>(d->model)) { - int oldCount = dataModel->count(); - dataModel->setDelegate(delegate); - d->modelCount = dataModel->count(); - d->regenerate(); - if (oldCount != dataModel->count()) - emit countChanged(); - emit delegateChanged(); - } -} - -/*! - \qmlproperty int QtQuick2::PathView::pathItemCount - This property holds the number of items visible on the path at any one time. -*/ -int QQuickPathView::pathItemCount() const -{ - Q_D(const QQuickPathView); - return d->pathItems; -} - -void QQuickPathView::setPathItemCount(int i) -{ - Q_D(QQuickPathView); - if (i == d->pathItems) - return; - if (i < 1) - i = 1; - d->pathItems = i; - d->updateMappedRange(); - if (d->isValid() && isComponentComplete()) { - d->regenerate(); - } - emit pathItemCountChanged(); -} - -QPointF QQuickPathViewPrivate::pointNear(const QPointF &point, qreal *nearPercent) const -{ - //XXX maybe do recursively at increasing resolution. - qreal mindist = 1e10; // big number - QPointF nearPoint = path->pointAt(0); - qreal nearPc = 0; - for (qreal i=1; i < 1000; i++) { - QPointF pt = path->pointAt(i/1000.0); - QPointF diff = pt - point; - qreal dist = diff.x()*diff.x() + diff.y()*diff.y(); - if (dist < mindist) { - nearPoint = pt; - nearPc = i; - mindist = dist; - } - } - - if (nearPercent) - *nearPercent = nearPc / 1000.0; - - return nearPoint; -} - -void QQuickPathView::mousePressEvent(QMouseEvent *event) -{ - Q_D(QQuickPathView); - if (d->interactive) { - d->handleMousePressEvent(event); - event->accept(); - } else { - QQuickItem::mousePressEvent(event); - } -} - -void QQuickPathViewPrivate::handleMousePressEvent(QMouseEvent *event) -{ - Q_Q(QQuickPathView); - if (!interactive || !items.count()) - return; - QPointF scenePoint = q->mapToScene(event->localPos()); - int idx = 0; - for (; idx < items.count(); ++idx) { - QRectF rect = items.at(idx)->boundingRect(); - rect = items.at(idx)->mapRectToScene(rect); - if (rect.contains(scenePoint)) - break; - } - if (idx == items.count() && dragMargin == 0.) // didn't click on an item - return; - - startPoint = pointNear(event->localPos(), &startPc); - if (idx == items.count()) { - qreal distance = qAbs(event->localPos().x() - startPoint.x()) + qAbs(event->localPos().y() - startPoint.y()); - if (distance > dragMargin) - return; - } - - if (tl.isActive() && flicking) - stealMouse = true; // If we've been flicked then steal the click. - else - stealMouse = false; - - lastElapsed = 0; - lastDist = 0; - QQuickItemPrivate::start(lastPosTime); - tl.clear(); -} - -void QQuickPathView::mouseMoveEvent(QMouseEvent *event) -{ - Q_D(QQuickPathView); - if (d->interactive) { - d->handleMouseMoveEvent(event); - if (d->stealMouse) - setKeepMouseGrab(true); - event->accept(); - } else { - QQuickItem::mouseMoveEvent(event); - } -} - -void QQuickPathViewPrivate::handleMouseMoveEvent(QMouseEvent *event) -{ - Q_Q(QQuickPathView); - if (!interactive || !lastPosTime.isValid()) - return; - - qreal newPc; - QPointF pathPoint = pointNear(event->localPos(), &newPc); - if (!stealMouse) { - QPointF delta = pathPoint - startPoint; - if (qAbs(delta.x()) > qApp->styleHints()->startDragDistance() || qAbs(delta.y()) > qApp->styleHints()->startDragDistance()) { - stealMouse = true; - startPc = newPc; - } - } - - if (stealMouse) { - moveReason = QQuickPathViewPrivate::Mouse; - qreal diff = (newPc - startPc)*modelCount*mappedRange; - if (diff) { - q->setOffset(offset + diff); - - if (diff > modelCount/2) - diff -= modelCount; - else if (diff < -modelCount/2) - diff += modelCount; - - lastElapsed = QQuickItemPrivate::restart(lastPosTime); - lastDist = diff; - startPc = newPc; - } - if (!moving) { - moving = true; - emit q->movingChanged(); - emit q->movementStarted(); - } - } -} - -void QQuickPathView::mouseReleaseEvent(QMouseEvent *event) -{ - Q_D(QQuickPathView); - if (d->interactive) { - d->handleMouseReleaseEvent(event); - event->accept(); - ungrabMouse(); - } else { - QQuickItem::mouseReleaseEvent(event); - } -} - -void QQuickPathViewPrivate::handleMouseReleaseEvent(QMouseEvent *) -{ - Q_Q(QQuickPathView); - stealMouse = false; - q->setKeepMouseGrab(false); - if (!interactive || !lastPosTime.isValid()) - return; - - qreal elapsed = qreal(lastElapsed + QQuickItemPrivate::elapsed(lastPosTime)) / 1000.; - qreal velocity = elapsed > 0. ? lastDist / elapsed : 0; - if (model && modelCount && qAbs(velocity) > 1.) { - qreal count = pathItems == -1 ? modelCount : pathItems; - if (qAbs(velocity) > count * 2) // limit velocity - velocity = (velocity > 0 ? count : -count) * 2; - // Calculate the distance to be travelled - qreal v2 = velocity*velocity; - qreal accel = deceleration/10; - // + 0.25 to encourage moving at least one item in the flick direction - qreal dist = qMin(qreal(modelCount-1), qreal(v2 / (accel * 2.0) + 0.25)); - if (haveHighlightRange && highlightRangeMode == QQuickPathView::StrictlyEnforceRange) { - // round to nearest item. - if (velocity > 0.) - dist = qRound(dist + offset) - offset; - else - dist = qRound(dist - offset) + offset; - // Calculate accel required to stop on item boundary - if (dist <= 0.) { - dist = 0.; - accel = 0.; - } else { - accel = v2 / (2.0f * qAbs(dist)); - } - } - offsetAdj = 0.0; - moveOffset.setValue(offset); - tl.accel(moveOffset, velocity, accel, dist); - tl.callback(QDeclarativeTimeLineCallback(&moveOffset, fixOffsetCallback, this)); - if (!flicking) { - flicking = true; - emit q->flickingChanged(); - emit q->flickStarted(); - } - } else { - fixOffset(); - } - - lastPosTime.invalidate(); - if (!tl.isActive()) - q->movementEnding(); -} - -bool QQuickPathView::sendMouseEvent(QMouseEvent *event) -{ - Q_D(QQuickPathView); - QRectF myRect = mapRectToScene(QRectF(0, 0, width(), height())); - QQuickCanvas *c = canvas(); - QQuickItem *grabber = c ? c->mouseGrabberItem() : 0; - bool stealThisEvent = d->stealMouse; - if ((stealThisEvent || myRect.contains(event->windowPos())) && (!grabber || !grabber->keepMouseGrab())) { - QMouseEvent mouseEvent(event->type(), mapFromScene(event->windowPos()), event->windowPos(), event->screenPos(), - event->button(), event->buttons(), event->modifiers()); - mouseEvent.setAccepted(false); - - switch (mouseEvent.type()) { - case QEvent::MouseMove: - d->handleMouseMoveEvent(&mouseEvent); - break; - case QEvent::MouseButtonPress: - d->handleMousePressEvent(&mouseEvent); - stealThisEvent = d->stealMouse; // Update stealThisEvent in case changed by function call above - break; - case QEvent::MouseButtonRelease: - d->handleMouseReleaseEvent(&mouseEvent); - break; - default: - break; - } - grabber = c->mouseGrabberItem(); - if (grabber && stealThisEvent && !grabber->keepMouseGrab() && grabber != this) - grabMouse(); - - return d->stealMouse; - } else if (d->lastPosTime.isValid()) { - d->lastPosTime.invalidate(); - d->fixOffset(); - } - if (event->type() == QEvent::MouseButtonRelease) - d->stealMouse = false; - return false; -} - -bool QQuickPathView::childMouseEventFilter(QQuickItem *i, QEvent *e) -{ - Q_D(QQuickPathView); - if (!isVisible() || !d->interactive) - return QQuickItem::childMouseEventFilter(i, e); - - switch (e->type()) { - case QEvent::MouseButtonPress: - case QEvent::MouseMove: - case QEvent::MouseButtonRelease: - return sendMouseEvent(static_cast<QMouseEvent *>(e)); - default: - break; - } - - return QQuickItem::childMouseEventFilter(i, e); -} - -void QQuickPathView::mouseUngrabEvent() -{ - Q_D(QQuickPathView); - if (d->stealMouse) { - // if our mouse grab has been removed (probably by a Flickable), - // fix our state - d->stealMouse = false; - setKeepMouseGrab(false); - d->lastPosTime.invalidate(); - } -} - -void QQuickPathView::updatePolish() -{ - QQuickItem::updatePolish(); - refill(); -} - -void QQuickPathView::componentComplete() -{ - Q_D(QQuickPathView); - if (d->model && d->ownModel) - static_cast<QQuickVisualDataModel *>(d->model.data())->componentComplete(); - - QQuickItem::componentComplete(); - - d->createHighlight(); - // It is possible that a refill has already happended to to Path - // bindings being handled in the componentComplete(). If so - // don't do it again. - if (d->items.count() == 0 && d->model) { - d->modelCount = d->model->count(); - d->regenerate(); - } - d->updateHighlight(); - - if (d->modelCount) - emit countChanged(); -} - -void QQuickPathView::refill() -{ - Q_D(QQuickPathView); - if (!d->isValid() || !isComponentComplete()) - return; - - d->layoutScheduled = false; - bool currentVisible = false; - - // first move existing items and remove items off path - int idx = d->firstIndex; - QList<QQuickItem*>::iterator it = d->items.begin(); - while (it != d->items.end()) { - qreal pos = d->positionOfIndex(idx); - QQuickItem *item = *it; - if (pos >= 0.0) { - d->updateItem(item, pos); - if (idx == d->currentIndex) { - currentVisible = true; - d->currentItemOffset = pos; - } - ++it; - } else { - // qDebug() << "release"; - d->updateItem(item, 1.0); - d->releaseItem(item); - if (it == d->items.begin()) { - if (++d->firstIndex >= d->modelCount) - d->firstIndex = 0; - } - it = d->items.erase(it); - } - ++idx; - if (idx >= d->modelCount) - idx = 0; - } - if (!d->items.count()) - d->firstIndex = -1; - - bool waiting = false; - if (d->modelCount) { - // add items to beginning and end - int count = d->pathItems == -1 ? d->modelCount : qMin(d->pathItems, d->modelCount); - if (d->items.count() < count) { - int idx = qRound(d->modelCount - d->offset) % d->modelCount; - qreal startPos = 0.0; - if (d->haveHighlightRange && d->highlightRangeMode != QQuickPathView::NoHighlightRange) - startPos = d->highlightRangeStart; - if (d->firstIndex >= 0) { - startPos = d->positionOfIndex(d->firstIndex); - idx = (d->firstIndex + d->items.count()) % d->modelCount; - } - qreal pos = d->positionOfIndex(idx); - while ((pos > startPos || !d->items.count()) && d->items.count() < count) { -// qDebug() << "append" << idx; - QQuickItem *item = d->getItem(idx, idx+1); - if (!item) { - waiting = true; - break; - } - if (d->currentIndex == idx) { - currentVisible = true; - d->currentItemOffset = pos; - } - if (d->items.count() == 0) - d->firstIndex = idx; - d->items.append(item); - d->updateItem(item, pos); - ++idx; - if (idx >= d->modelCount) - idx = 0; - pos = d->positionOfIndex(idx); - } - - idx = d->firstIndex - 1; - if (idx < 0) - idx = d->modelCount - 1; - pos = d->positionOfIndex(idx); - while (!waiting && (pos >= 0.0 && pos < startPos) && d->items.count() < count) { -// qDebug() << "prepend" << idx; - QQuickItem *item = d->getItem(idx, idx+1); - if (!item) { - waiting = true; - break; - } - if (d->currentIndex == idx) { - currentVisible = true; - d->currentItemOffset = pos; - } - d->items.prepend(item); - d->updateItem(item, pos); - d->firstIndex = idx; - idx = d->firstIndex - 1; - if (idx < 0) - idx = d->modelCount - 1; - pos = d->positionOfIndex(idx); - } - } - } - - if (!currentVisible) { - d->currentItemOffset = 1.0; - if (d->currentItem) { - if (QQuickPathViewAttached *att = d->attached(d->currentItem)) - att->setOnPath(false); - } else if (!waiting && d->currentIndex >= 0 && d->currentIndex < d->modelCount) { - if (d->currentItem = d->getItem(d->currentIndex, d->currentIndex, false)) { - d->updateItem(d->currentItem, d->currentIndex < d->firstIndex ? 0.0 : 1.0); - if (QQuickPathViewAttached *att = d->attached(d->currentItem)) - att->setIsCurrentItem(true); - } - } - } else if (!waiting && !d->currentItem) { - if (d->currentItem = d->getItem(d->currentIndex, d->currentIndex, true)) { - d->currentItem->setFocus(true); - if (QQuickPathViewAttached *att = d->attached(d->currentItem)) - att->setIsCurrentItem(true); - } - } - - if (d->highlightItem && d->haveHighlightRange && d->highlightRangeMode == QQuickPathView::StrictlyEnforceRange) { - d->updateItem(d->highlightItem, d->highlightRangeStart); - if (QQuickPathViewAttached *att = d->attached(d->highlightItem)) - att->setOnPath(true); - } else if (d->highlightItem && d->moveReason != QQuickPathViewPrivate::SetIndex) { - d->updateItem(d->highlightItem, d->currentItemOffset); - if (QQuickPathViewAttached *att = d->attached(d->highlightItem)) - att->setOnPath(currentVisible); - } - while (d->itemCache.count()) - d->releaseItem(d->itemCache.takeLast()); -} - -void QQuickPathView::modelUpdated(const QDeclarativeChangeSet &changeSet, bool reset) -{ - Q_D(QQuickPathView); - if (!d->model || !d->model->isValid() || !d->path || !isComponentComplete()) - return; - - if (reset) { - d->modelCount = d->model->count(); - d->regenerate(); - emit countChanged(); - return; - } - - if (changeSet.removes().isEmpty() && changeSet.inserts().isEmpty()) - return; - - const int modelCount = d->modelCount; - int moveId = -1; - int moveOffset; - bool currentChanged = false; - bool changedOffset = false; - foreach (const QDeclarativeChangeSet::Remove &r, changeSet.removes()) { - if (moveId == -1 && d->currentIndex >= r.index + r.count) { - d->currentIndex -= r.count; - currentChanged = true; - } else if (moveId == -1 && d->currentIndex >= r.index && d->currentIndex < r.index + r.count) { - // current item has been removed. - d->currentIndex = qMin(r.index, d->modelCount - r.count - 1); - if (r.isMove()) { - moveId = r.moveId; - moveOffset = d->currentIndex - r.index; - } else if (d->currentItem) { - if (QQuickPathViewAttached *att = d->attached(d->currentItem)) - att->setIsCurrentItem(true); - d->releaseItem(d->currentItem); - d->currentItem = 0; - } - currentChanged = true; - } - - if (r.index > d->currentIndex) { - changedOffset = true; - d->offset -= r.count; - d->offsetAdj -= r.count; - } - d->modelCount -= r.count; - } - foreach (const QDeclarativeChangeSet::Insert &i, changeSet.inserts()) { - if (d->modelCount) { - if (moveId == -1 && i.index <= d->currentIndex) { - d->currentIndex += i.count; - currentChanged = true; - } else { - if (moveId != -1 && moveId == i.moveId) { - d->currentIndex = i.index + moveOffset; - currentChanged = true; - } - if (i.index > d->currentIndex) { - d->offset += i.count; - d->offsetAdj += i.count; - changedOffset = true; - } - } - } - d->modelCount += i.count; - } - - d->offset = qmlMod(d->offset, d->modelCount); - if (d->offset < 0) - d->offset += d->modelCount; - - d->itemCache += d->items; - d->items.clear(); - - if (!d->modelCount) { - while (d->itemCache.count()) - d->releaseItem(d->itemCache.takeLast()); - d->offset = 0; - changedOffset = true; - d->tl.reset(d->moveOffset); - } else { - if (!d->flicking && !d->moving && d->haveHighlightRange && d->highlightRangeMode == QQuickPathView::StrictlyEnforceRange) { - d->offset = qmlMod(d->modelCount - d->currentIndex, d->modelCount); - changedOffset = true; - } - d->firstIndex = -1; - d->updateMappedRange(); - d->scheduleLayout(); - } - if (changedOffset) - emit offsetChanged(); - if (currentChanged) - emit currentIndexChanged(); - if (d->modelCount != modelCount) - emit countChanged(); -} - -void QQuickPathView::destroyingItem(QQuickItem *item) -{ - Q_UNUSED(item); -} - -void QQuickPathView::ticked() -{ - Q_D(QQuickPathView); - d->updateCurrent(); -} - -void QQuickPathView::movementEnding() -{ - Q_D(QQuickPathView); - if (d->flicking) { - d->flicking = false; - emit flickingChanged(); - emit flickEnded(); - } - if (d->moving && !d->stealMouse) { - d->moving = false; - emit movingChanged(); - emit movementEnded(); - } -} - -// find the item closest to the snap position -int QQuickPathViewPrivate::calcCurrentIndex() -{ - int current = -1; - if (modelCount && model && items.count()) { - offset = qmlMod(offset, modelCount); - if (offset < 0) - offset += modelCount; - current = qRound(qAbs(qmlMod(modelCount - offset, modelCount))); - current = current % modelCount; - } - - return current; -} - -void QQuickPathViewPrivate::createCurrentItem() -{ - if (requestedIndex != -1) - return; - int itemIndex = (currentIndex - firstIndex + modelCount) % modelCount; - if (itemIndex < items.count()) { - if (currentItem = getItem(currentIndex, currentIndex, true)) { - currentItem->setFocus(true); - if (QQuickPathViewAttached *att = attached(currentItem)) - att->setIsCurrentItem(true); - } - } else if (currentIndex >= 0 && currentIndex < modelCount) { - if (currentItem = getItem(currentIndex, currentIndex, false)) { - updateItem(currentItem, currentIndex < firstIndex ? 0.0 : 1.0); - if (QQuickPathViewAttached *att = attached(currentItem)) - att->setIsCurrentItem(true); - } - } -} - -void QQuickPathViewPrivate::updateCurrent() -{ - Q_Q(QQuickPathView); - if (moveReason != Mouse) - return; - if (!modelCount || !haveHighlightRange || highlightRangeMode != QQuickPathView::StrictlyEnforceRange) - return; - - int idx = calcCurrentIndex(); - if (model && idx != currentIndex) { - if (currentItem) { - if (QQuickPathViewAttached *att = attached(currentItem)) - att->setIsCurrentItem(false); - releaseItem(currentItem); - } - currentIndex = idx; - currentItem = 0; - createCurrentItem(); - emit q->currentIndexChanged(); - } -} - -void QQuickPathViewPrivate::fixOffsetCallback(void *d) -{ - ((QQuickPathViewPrivate *)d)->fixOffset(); -} - -void QQuickPathViewPrivate::fixOffset() -{ - Q_Q(QQuickPathView); - if (model && items.count()) { - if (haveHighlightRange && highlightRangeMode == QQuickPathView::StrictlyEnforceRange) { - int curr = calcCurrentIndex(); - if (curr != currentIndex) - q->setCurrentIndex(curr); - else - snapToCurrent(); - } - } -} - -void QQuickPathViewPrivate::snapToCurrent() -{ - if (!model || modelCount <= 0) - return; - - qreal targetOffset = qmlMod(modelCount - currentIndex, modelCount); - - if (offset == targetOffset) - return; - - moveReason = Other; - offsetAdj = 0.0; - tl.reset(moveOffset); - moveOffset.setValue(offset); - - const int duration = highlightMoveDuration; - - if (!duration) { - tl.set(moveOffset, targetOffset); - } else if (moveDirection == Positive || (moveDirection == Shortest && targetOffset - offset > modelCount/2)) { - qreal distance = modelCount - targetOffset + offset; - if (targetOffset > moveOffset) { - tl.move(moveOffset, 0.0, QEasingCurve(QEasingCurve::InQuad), int(duration * offset / distance)); - tl.set(moveOffset, modelCount); - tl.move(moveOffset, targetOffset, QEasingCurve(offset == 0.0 ? QEasingCurve::InOutQuad : QEasingCurve::OutQuad), int(duration * (modelCount-targetOffset) / distance)); - } else { - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InOutQuad), duration); - } - } else if (moveDirection == Negative || targetOffset - offset <= -modelCount/2) { - qreal distance = modelCount - offset + targetOffset; - if (targetOffset < moveOffset) { - tl.move(moveOffset, modelCount, QEasingCurve(targetOffset == 0 ? QEasingCurve::InOutQuad : QEasingCurve::InQuad), int(duration * (modelCount-offset) / distance)); - tl.set(moveOffset, 0.0); - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::OutQuad), int(duration * targetOffset / distance)); - } else { - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InOutQuad), duration); - } - } else { - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InOutQuad), duration); - } - moveDirection = Shortest; -} - -QQuickPathViewAttached *QQuickPathView::qmlAttachedProperties(QObject *obj) -{ - return new QQuickPathViewAttached(obj); -} - -QT_END_NAMESPACE - |