diff options
Diffstat (limited to 'src/quick/items/qquicklistview.cpp')
-rw-r--r-- | src/quick/items/qquicklistview.cpp | 82 |
1 files changed, 45 insertions, 37 deletions
diff --git a/src/quick/items/qquicklistview.cpp b/src/quick/items/qquicklistview.cpp index 8852b4195f..38b157b07b 100644 --- a/src/quick/items/qquicklistview.cpp +++ b/src/quick/items/qquicklistview.cpp @@ -2,7 +2,7 @@ ** ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) +** Contact: http://www.qt-project.org/ ** ** This file is part of the QtDeclarative module of the Qt Toolkit. ** @@ -60,6 +60,8 @@ QT_BEGIN_NAMESPACE #define QML_FLICK_SNAPONETHRESHOLD 30 #endif +//#define DEBUG_DELEGATE_LIFECYCLE + class FxListItemSG; class QQuickListViewPrivate : public QQuickItemViewPrivate @@ -93,17 +95,16 @@ public: virtual void initializeViewItem(FxViewItem *item); virtual void releaseItem(FxViewItem *item); virtual void repositionPackageItemAt(QQuickItem *item, int index); - virtual void resetItemPosition(FxViewItem *item, FxViewItem *toItem); - virtual void resetFirstItemPosition(); - virtual void adjustFirstItem(qreal forwards, qreal backwards); + virtual void resetFirstItemPosition(qreal pos = 0.0); + virtual void adjustFirstItem(qreal forwards, qreal backwards, int); virtual void createHighlight(); virtual void updateHighlight(); virtual void resetHighlightPosition(); virtual void setPosition(qreal pos); - virtual void layoutVisibleItems(); - virtual bool applyInsertionChange(const QDeclarativeChangeSet::Insert &insert, ChangeResult *changeResult, bool *newVisibleItemsFirst, QList<FxViewItem *> *addedItems); + virtual void layoutVisibleItems(int fromModelIndex = 0); + virtual bool applyInsertionChange(const QDeclarativeChangeSet::Insert &insert, ChangeResult *changeResult, QList<FxViewItem *> *addedItems); virtual void updateSections(); QQuickItem *getSectionItem(const QString §ion); @@ -606,7 +607,9 @@ bool QQuickListViewPrivate::addVisibleItems(qreal fillFrom, qreal fillTo, bool d FxListItemSG *item = 0; qreal pos = itemEnd; while (modelIndex < model->count() && pos <= fillTo) { -// qDebug() << "refill: append item" << modelIndex << "pos" << pos; +#ifdef DEBUG_DELEGATE_LIFECYCLE + qDebug() << "refill: append item" << modelIndex << "pos" << pos; +#endif if (!(item = static_cast<FxListItemSG*>(createItem(modelIndex, doBuffer)))) break; item->setPosition(pos); @@ -616,8 +619,14 @@ bool QQuickListViewPrivate::addVisibleItems(qreal fillFrom, qreal fillTo, bool d ++modelIndex; changed = true; } + + if (doBuffer && requestedIndex != -1) // already waiting for an item + return changed; + while (visibleIndex > 0 && visibleIndex <= model->count() && visiblePos > fillFrom) { -// qDebug() << "refill: prepend item" << visibleIndex-1 << "current top pos" << visiblePos; +#ifdef DEBUG_DELEGATE_LIFECYCLE + qDebug() << "refill: prepend item" << visibleIndex-1 << "current top pos" << visiblePos; +#endif if (!(item = static_cast<FxListItemSG*>(createItem(visibleIndex-1, doBuffer)))) break; --visibleIndex; @@ -646,8 +655,9 @@ bool QQuickListViewPrivate::removeNonVisibleItems(qreal bufferFrom, qreal buffer if (item->attached->delayRemove()) break; if (item->size() > 0) { -// qDebug() << "refill: remove first" << visibleIndex << "top end pos" << item->endPosition(); - +#ifdef DEBUG_DELEGATE_LIFECYCLE + qDebug() << "refill: remove first" << visibleIndex << "top end pos" << item->endPosition(); +#endif // remove this item and all zero-sized items before it while (item) { if (item->index != -1) @@ -667,7 +677,9 @@ bool QQuickListViewPrivate::removeNonVisibleItems(qreal bufferFrom, qreal buffer while (visibleItems.count() > 1 && (item = visibleItems.last()) && item->position() > bufferTo) { if (item->attached->delayRemove()) break; -// qDebug() << "refill: remove last" << visibleIndex+visibleItems.count()-1 << item->position(); +#ifdef DEBUG_DELEGATE_LIFECYCLE + qDebug() << "refill: remove last" << visibleIndex+visibleItems.count()-1 << item->position(); +#endif visibleItems.removeLast(); releaseItem(item); changed = true; @@ -693,7 +705,7 @@ void QQuickListViewPrivate::visibleItemsChanged() updateUnrequestedPositions(); } -void QQuickListViewPrivate::layoutVisibleItems() +void QQuickListViewPrivate::layoutVisibleItems(int fromModelIndex) { if (!visibleItems.isEmpty()) { const qreal from = isContentFlowReversed() ? -position() - size() : position(); @@ -706,8 +718,10 @@ void QQuickListViewPrivate::layoutVisibleItems() firstItem->item->setVisible(firstItem->endPosition() >= from && firstItem->position() <= to); for (int i=1; i < visibleItems.count(); ++i) { FxListItemSG *item = static_cast<FxListItemSG*>(visibleItems.at(i)); - item->setPosition(pos); - item->item->setVisible(item->endPosition() >= from && item->position() <= to); + if (item->index >= fromModelIndex) { + item->setPosition(pos); + item->item->setVisible(item->endPosition() >= from && item->position() <= to); + } pos += item->size() + spacing; sum += item->size(); fixedCurrent = fixedCurrent || (currentItem && item->item == currentItem->item); @@ -738,20 +752,13 @@ void QQuickListViewPrivate::repositionPackageItemAt(QQuickItem *item, int index) } } -void QQuickListViewPrivate::resetItemPosition(FxViewItem *item, FxViewItem *toItem) -{ - if (item == toItem) - return; - static_cast<FxListItemSG*>(item)->setPosition(toItem->position()); -} - -void QQuickListViewPrivate::resetFirstItemPosition() +void QQuickListViewPrivate::resetFirstItemPosition(qreal pos) { FxListItemSG *item = static_cast<FxListItemSG*>(visibleItems.first()); - item->setPosition(0); + item->setPosition(pos); } -void QQuickListViewPrivate::adjustFirstItem(qreal forwards, qreal backwards) +void QQuickListViewPrivate::adjustFirstItem(qreal forwards, qreal backwards, int) { if (!visibleItems.count()) return; @@ -1832,7 +1839,7 @@ void QQuickListView::setSpacing(qreal spacing) if (spacing != d->spacing) { d->spacing = spacing; d->forceLayout = true; - d->layout(); + polish(); emit spacingChanged(); } } @@ -2198,14 +2205,6 @@ void QQuickListView::viewportMoved() return; d->inViewportMoved = true; - // Set visibility of items to eliminate cost of items outside the visible area. - qreal from = d->isContentFlowReversed() ? -d->position()-d->size() : d->position(); - qreal to = d->isContentFlowReversed() ? -d->position() : d->position()+d->size(); - for (int i = 0; i < d->visibleItems.count(); ++i) { - FxViewItem *item = static_cast<FxListItemSG*>(d->visibleItems.at(i)); - item->item->setVisible(item->endPosition() >= from && item->position() <= to); - } - if (yflick()) d->bufferMode = d->vData.smoothVelocity < 0 ? QQuickListViewPrivate::BufferBefore : QQuickListViewPrivate::BufferAfter; else if (d->isRightToLeft()) @@ -2214,6 +2213,15 @@ void QQuickListView::viewportMoved() d->bufferMode = d->hData.smoothVelocity < 0 ? QQuickListViewPrivate::BufferBefore : QQuickListViewPrivate::BufferAfter; d->refill(); + + // Set visibility of items to eliminate cost of items outside the visible area. + qreal from = d->isContentFlowReversed() ? -d->position()-d->size() : d->position(); + qreal to = d->isContentFlowReversed() ? -d->position() : d->position()+d->size(); + for (int i = 0; i < d->visibleItems.count(); ++i) { + FxViewItem *item = static_cast<FxListItemSG*>(d->visibleItems.at(i)); + item->item->setVisible(item->endPosition() >= from && item->position() <= to); + } + if (d->hData.flicking || d->vData.flicking || d->hData.moving || d->vData.moving) d->moveReason = QQuickListViewPrivate::Mouse; if (d->moveReason != QQuickListViewPrivate::SetIndex) { @@ -2375,12 +2383,12 @@ void QQuickListView::updateSections() d->updateSections(); if (d->itemCount) { d->forceLayout = true; - d->layout(); + polish(); } } } -bool QQuickListViewPrivate::applyInsertionChange(const QDeclarativeChangeSet::Insert &change, ChangeResult *insertResult, bool *newVisibleItemsFirst, QList<FxViewItem *> *addedItems) +bool QQuickListViewPrivate::applyInsertionChange(const QDeclarativeChangeSet::Insert &change, ChangeResult *insertResult, QList<FxViewItem *> *addedItems) { int modelIndex = change.index; int count = change.count; @@ -2444,7 +2452,7 @@ bool QQuickListViewPrivate::applyInsertionChange(const QDeclarativeChangeSet::In visibleItems.insert(insertionIdx, item); if (insertionIdx == 0) - *newVisibleItemsFirst = true; + insertResult->changedFirstItem = true; if (!change.isMove()) addedItems->append(item); insertResult->sizeChangesBeforeVisiblePos += item->size() + spacing; @@ -2466,7 +2474,7 @@ bool QQuickListViewPrivate::applyInsertionChange(const QDeclarativeChangeSet::In visibleItems.insert(index, item); if (index == 0) - *newVisibleItemsFirst = true; + insertResult->changedFirstItem = true; if (!change.isMove()) addedItems->append(item); insertResult->sizeChangesAfterVisiblePos += item->size() + spacing; |