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author | Thiago Macieira <thiago.macieira@nokia.com> | 2011-02-10 22:35:31 (GMT) |
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committer | Thiago Macieira <thiago.macieira@nokia.com> | 2011-02-10 22:35:31 (GMT) |
commit | ca13ba801144763b1ca7c39b2ef8594de94e2d3e (patch) | |
tree | 7600e31df6ce715a5bc28c0c97983bac9484c7cb /src/declarative/graphicsitems/qdeclarativelistview.cpp | |
parent | ab38731fe5dcfaa1a7a70bc290a8856b5b01524d (diff) | |
parent | ec20a6da3edea3031f1705c3b13e24dc2c7c6de5 (diff) | |
download | Qt-ca13ba801144763b1ca7c39b2ef8594de94e2d3e.zip Qt-ca13ba801144763b1ca7c39b2ef8594de94e2d3e.tar.gz Qt-ca13ba801144763b1ca7c39b2ef8594de94e2d3e.tar.bz2 |
Merge remote-tracking branch 'origin/4.7' into HEAD
Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativelistview.cpp')
-rw-r--r-- | src/declarative/graphicsitems/qdeclarativelistview.cpp | 211 |
1 files changed, 132 insertions, 79 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativelistview.cpp b/src/declarative/graphicsitems/qdeclarativelistview.cpp index b4b3fa7..a60a4aa 100644 --- a/src/declarative/graphicsitems/qdeclarativelistview.cpp +++ b/src/declarative/graphicsitems/qdeclarativelistview.cpp @@ -413,8 +413,10 @@ public: } } if ((header && header->item == item) || (footer && footer->item == item)) { - updateHeader(); - updateFooter(); + if (header) + updateHeader(); + if (footer) + updateFooter(); } if (currentItem && currentItem->item == item) updateHighlight(); @@ -451,6 +453,7 @@ public: void updateHeader(); void updateFooter(); void fixupPosition(); + void positionViewAtIndex(int index, int mode); virtual void fixup(AxisData &data, qreal minExtent, qreal maxExtent); virtual void flick(QDeclarativeFlickablePrivate::AxisData &data, qreal minExtent, qreal maxExtent, qreal vSize, QDeclarativeTimeLineCallback::Callback fixupCallback, qreal velocity); @@ -935,6 +938,9 @@ void QDeclarativeListViewPrivate::createSection(FxListItem *listItem) } } listItem->setPosition(pos); + } else { + QDeclarativeContext *context = QDeclarativeEngine::contextForObject(listItem->section)->parentContext(); + context->setContextProperty(QLatin1String("section"), listItem->attached->m_section); } } else if (listItem->section) { qreal pos = listItem->position(); @@ -2231,6 +2237,9 @@ void QDeclarativeListView::setFooter(QDeclarativeComponent *footer) Q_D(QDeclarativeListView); if (d->footerComponent != footer) { if (d->footer) { + if (scene()) + scene()->removeItem(d->footer->item); + d->footer->item->deleteLater(); delete d->footer; d->footer = 0; } @@ -2240,6 +2249,7 @@ void QDeclarativeListView::setFooter(QDeclarativeComponent *footer) if (isComponentComplete()) { d->updateFooter(); d->updateViewport(); + d->fixupPosition(); } emit footerChanged(); } @@ -2265,6 +2275,9 @@ void QDeclarativeListView::setHeader(QDeclarativeComponent *header) Q_D(QDeclarativeListView); if (d->headerComponent != header) { if (d->header) { + if (scene()) + scene()->removeItem(d->header->item); + d->header->item->deleteLater(); delete d->header; d->header = 0; } @@ -2275,6 +2288,7 @@ void QDeclarativeListView::setHeader(QDeclarativeComponent *header) d->updateHeader(); d->updateFooter(); d->updateViewport(); + d->fixupPosition(); } emit headerChanged(); } @@ -2558,6 +2572,78 @@ void QDeclarativeListView::decrementCurrentIndex() } } +void QDeclarativeListViewPrivate::positionViewAtIndex(int index, int mode) +{ + Q_Q(QDeclarativeListView); + if (!isValid()) + return; + if (mode < QDeclarativeListView::Beginning || mode > QDeclarativeListView::Contain) + return; + int idx = qMax(qMin(index, model->count()-1), 0); + + if (layoutScheduled) + layout(); + qreal pos = position(); + FxListItem *item = visibleItem(idx); + qreal maxExtent = orient == QDeclarativeListView::Vertical ? -q->maxYExtent() : -q->maxXExtent(); + if (!item) { + int itemPos = positionAt(idx); + // save the currently visible items in case any of them end up visible again + QList<FxListItem*> oldVisible = visibleItems; + visibleItems.clear(); + visiblePos = itemPos; + visibleIndex = idx; + setPosition(qMin(qreal(itemPos), maxExtent)); + // now release the reference to all the old visible items. + for (int i = 0; i < oldVisible.count(); ++i) + releaseItem(oldVisible.at(i)); + item = visibleItem(idx); + } + if (item) { + const qreal itemPos = item->position(); + switch (mode) { + case QDeclarativeListView::Beginning: + pos = itemPos; + if (index < 0 && header) + pos -= header->size(); + break; + case QDeclarativeListView::Center: + pos = itemPos - (size() - item->size())/2; + break; + case QDeclarativeListView::End: + pos = itemPos - size() + item->size(); + if (index >= model->count() && footer) + pos += footer->size(); + break; + case QDeclarativeListView::Visible: + if (itemPos > pos + size()) + pos = itemPos - size() + item->size(); + else if (item->endPosition() < pos) + pos = itemPos; + break; + case QDeclarativeListView::Contain: + if (item->endPosition() > pos + size()) + pos = itemPos - size() + item->size(); + if (itemPos < pos) + pos = itemPos; + } + pos = qMin(pos, maxExtent); + qreal minExtent = orient == QDeclarativeListView::Vertical ? -q->minYExtent() : -q->minXExtent(); + pos = qMax(pos, minExtent); + moveReason = QDeclarativeListViewPrivate::Other; + q->cancelFlick(); + setPosition(pos); + if (highlight) { + if (autoHighlight) { + highlight->setPosition(currentItem->itemPosition()); + highlight->setSize(currentItem->itemSize()); + } + updateHighlight(); + } + } + fixupPosition(); +} + /*! \qmlmethod ListView::positionViewAtIndex(int index, PositionMode mode) @@ -2596,66 +2682,42 @@ void QDeclarativeListView::positionViewAtIndex(int index, int mode) Q_D(QDeclarativeListView); if (!d->isValid() || index < 0 || index >= d->model->count()) return; - if (mode < Beginning || mode > Contain) + d->positionViewAtIndex(index, mode); +} + +/*! + \qmlmethod ListView::positionViewAtBeginning() + \qmlmethod ListView::positionViewAtEnd() + + Positions the view at the beginning or end, taking into account any header or footer. + + It is not recommended to use \l {Flickable::}{contentX} or \l {Flickable::}{contentY} to position the view + at a particular index. This is unreliable since removing items from the start + of the list does not cause all other items to be repositioned, and because + the actual start of the view can vary based on the size of the delegates. + + \bold Note: methods should only be called after the Component has completed. To position + the view at startup, this method should be called by Component.onCompleted. For + example, to position the view at the end on startup: + + \code + Component.onCompleted: positionViewAtEnd() + \endcode +*/ +void QDeclarativeListView::positionViewAtBeginning() +{ + Q_D(QDeclarativeListView); + if (!d->isValid()) return; + d->positionViewAtIndex(-1, Beginning); +} - if (d->layoutScheduled) - d->layout(); - qreal pos = d->position(); - FxListItem *item = d->visibleItem(index); - qreal maxExtent = d->orient == QDeclarativeListView::Vertical ? -maxYExtent() : -maxXExtent(); - if (!item) { - int itemPos = d->positionAt(index); - // save the currently visible items in case any of them end up visible again - QList<FxListItem*> oldVisible = d->visibleItems; - d->visibleItems.clear(); - d->visiblePos = itemPos; - d->visibleIndex = index; - d->setPosition(qMin(qreal(itemPos), maxExtent)); - // now release the reference to all the old visible items. - for (int i = 0; i < oldVisible.count(); ++i) - d->releaseItem(oldVisible.at(i)); - item = d->visibleItem(index); - } - if (item) { - const qreal itemPos = item->position(); - switch (mode) { - case Beginning: - pos = itemPos; - break; - case Center: - pos = itemPos - (d->size() - item->size())/2; - break; - case End: - pos = itemPos - d->size() + item->size(); - break; - case Visible: - if (itemPos > pos + d->size()) - pos = itemPos - d->size() + item->size(); - else if (item->endPosition() < pos) - pos = itemPos; - break; - case Contain: - if (item->endPosition() > pos + d->size()) - pos = itemPos - d->size() + item->size(); - if (itemPos < pos) - pos = itemPos; - } - pos = qMin(pos, maxExtent); - qreal minExtent = d->orient == QDeclarativeListView::Vertical ? -minYExtent() : -minXExtent(); - pos = qMax(pos, minExtent); - d->moveReason = QDeclarativeListViewPrivate::Other; - cancelFlick(); - d->setPosition(pos); - if (d->highlight) { - if (d->autoHighlight) { - d->highlight->setPosition(d->currentItem->itemPosition()); - d->highlight->setSize(d->currentItem->itemSize()); - } - d->updateHighlight(); - } - } - d->fixupPosition(); +void QDeclarativeListView::positionViewAtEnd() +{ + Q_D(QDeclarativeListView); + if (!d->isValid()) + return; + d->positionViewAtIndex(d->model->count(), End); } /*! @@ -2791,23 +2853,8 @@ void QDeclarativeListView::itemsInserted(int modelIndex, int count) return; d->updateUnrequestedIndexes(); d->moveReason = QDeclarativeListViewPrivate::Other; - if (!d->visibleItems.count() || d->model->count() <= 1) { - d->scheduleLayout(); - if (d->itemCount && d->currentIndex >= modelIndex) { - // adjust current item index - d->currentIndex += count; - if (d->currentItem) - d->currentItem->index = d->currentIndex; - emit currentIndexChanged(); - } else if (!d->currentIndex || (d->currentIndex < 0 && !d->currentIndexCleared)) { - d->updateCurrent(0); - } - d->itemCount += count; - emit countChanged(); - return; - } - int index = d->mapFromModel(modelIndex); + 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) @@ -2843,11 +2890,15 @@ void QDeclarativeListView::itemsInserted(int modelIndex, int count) } } - // At least some of the added items will be visible - // index can be the next item past the end of the visible items list (i.e. appended) - int pos = index < d->visibleItems.count() ? d->visibleItems.at(index)->position() + int pos = 0; + if (d->visibleItems.count()) { + pos = index < d->visibleItems.count() ? d->visibleItems.at(index)->position() : d->visibleItems.last()->endPosition()+d->spacing+1; + } else if (d->itemCount == 0 && d->header) { + pos = d->header->size(); + } + int initialPos = pos; int diff = 0; QList<FxListItem*> added; @@ -2914,6 +2965,8 @@ void QDeclarativeListView::itemsInserted(int modelIndex, int count) if (d->currentItem) { d->currentItem->index = d->currentIndex; d->currentItem->setPosition(d->currentItem->position() + diff); + } else if (!d->currentIndex || (d->currentIndex < 0 && !d->currentIndexCleared)) { + d->updateCurrent(0); } emit currentIndexChanged(); } |