diff options
Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativelistview.cpp')
| -rw-r--r-- | src/declarative/graphicsitems/qdeclarativelistview.cpp | 277 |
1 files changed, 179 insertions, 98 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativelistview.cpp b/src/declarative/graphicsitems/qdeclarativelistview.cpp index b4b3fa7..e369ba6 100644 --- a/src/declarative/graphicsitems/qdeclarativelistview.cpp +++ b/src/declarative/graphicsitems/qdeclarativelistview.cpp @@ -148,7 +148,7 @@ public: else item->setWidth(size); } - bool contains(int x, int y) const { + bool contains(qreal x, qreal y) const { return (x >= item->x() && x < item->x() + item->width() && y >= item->y() && y < item->y() + item->height()); } @@ -228,6 +228,26 @@ public: return 0; } + // Returns the item before modelIndex, if created. + // May return an item marked for removal. + FxListItem *itemBefore(int modelIndex) const { + if (modelIndex < visibleIndex) + return 0; + int idx = 1; + int lastIndex = -1; + while (idx < visibleItems.count()) { + FxListItem *item = visibleItems.at(idx); + if (item->index != -1) + lastIndex = item->index; + if (item->index == modelIndex) + return visibleItems.at(idx-1); + ++idx; + } + if (lastIndex == modelIndex-1) + return visibleItems.last(); + return 0; + } + qreal position() const { Q_Q(const QDeclarativeListView); return orient == QDeclarativeListView::Vertical ? q->contentY() : q->contentX(); @@ -413,8 +433,10 @@ 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 +473,7 @@ 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); @@ -558,7 +581,7 @@ FxListItem *QDeclarativeListViewPrivate::createItem(int modelIndex) QString propValue = model->stringValue(modelIndex, sectionCriteria->property()); listItem->attached->m_section = sectionCriteria->sectionString(propValue); if (modelIndex > 0) { - if (FxListItem *item = visibleItem(modelIndex-1)) + if (FxListItem *item = itemBefore(modelIndex)) listItem->attached->m_prevSection = item->attached->section(); else listItem->attached->m_prevSection = sectionAt(modelIndex-1); @@ -919,7 +942,7 @@ void QDeclarativeListViewPrivate::createSection(FxListItem *listItem) } else { QDeclarativeContext *context = new QDeclarativeContext(qmlContext(q)); context->setContextProperty(QLatin1String("section"), listItem->attached->m_section); - QObject *nobj = sectionCriteria->delegate()->create(context); + QObject *nobj = sectionCriteria->delegate()->beginCreate(context); if (nobj) { QDeclarative_setParent_noEvent(context, nobj); listItem->section = qobject_cast<QDeclarativeItem *>(nobj); @@ -933,8 +956,12 @@ void QDeclarativeListViewPrivate::createSection(FxListItem *listItem) } else { delete context; } + sectionCriteria->delegate()->completeCreate(); } listItem->setPosition(pos); + } else { + QDeclarativeContext *context = QDeclarativeEngine::contextForObject(listItem->section)->parentContext(); + context->setContextProperty(QLatin1String("section"), listItem->attached->m_section); } } else if (listItem->section) { qreal pos = listItem->position(); @@ -963,18 +990,18 @@ void QDeclarativeListViewPrivate::updateSections() QDeclarativeListViewAttached *prevAtt = 0; int idx = -1; for (int i = 0; i < visibleItems.count(); ++i) { + QDeclarativeListViewAttached *attached = visibleItems.at(i)->attached; + attached->setPrevSection(prevSection); if (visibleItems.at(i)->index != -1) { - QDeclarativeListViewAttached *attached = visibleItems.at(i)->attached; - attached->setPrevSection(prevSection); QString propValue = model->stringValue(visibleItems.at(i)->index, sectionCriteria->property()); attached->setSection(sectionCriteria->sectionString(propValue)); - if (prevAtt) - prevAtt->setNextSection(attached->section()); - createSection(visibleItems.at(i)); - prevSection = attached->section(); - prevAtt = attached; idx = visibleItems.at(i)->index; } + createSection(visibleItems.at(i)); + if (prevAtt) + prevAtt->setNextSection(attached->section()); + prevSection = attached->section(); + prevAtt = attached; } if (prevAtt) { if (idx > 0 && idx < model->count()-1) @@ -1171,8 +1198,7 @@ void QDeclarativeListViewPrivate::fixup(AxisData &data, qreal minExtent, qreal m return; correctFlick = false; - int oldDuration = fixupDuration; - fixupDuration = moveReason == Mouse ? fixupDuration : 0; + fixupMode = moveReason == Mouse ? fixupMode : Immediate; if (currentItem && haveHighlightRange && highlightRange == QDeclarativeListView::StrictlyEnforceRange) { updateHighlight(); @@ -1185,10 +1211,12 @@ void QDeclarativeListViewPrivate::fixup(AxisData &data, qreal minExtent, qreal m timeline.reset(data.move); if (viewPos != position()) { - if (fixupDuration) + if (fixupMode != Immediate) { timeline.move(data.move, -viewPos, QEasingCurve(QEasingCurve::InOutQuad), fixupDuration/2); - else + data.fixingUp = true; + } else { timeline.set(data.move, -viewPos); + } } vTime = timeline.time(); } else if (snapMode != QDeclarativeListView::NoSnap) { @@ -1204,23 +1232,24 @@ void QDeclarativeListViewPrivate::fixup(AxisData &data, qreal minExtent, qreal m pos = qMax(qMin(bottomItem->position() - highlightRangeStart, -maxExtent), -minExtent); } else { QDeclarativeFlickablePrivate::fixup(data, minExtent, maxExtent); - fixupDuration = oldDuration; return; } qreal dist = qAbs(data.move + pos); if (dist > 0) { timeline.reset(data.move); - if (fixupDuration) + if (fixupMode != Immediate) { timeline.move(data.move, -pos, QEasingCurve(QEasingCurve::InOutQuad), fixupDuration/2); - else + data.fixingUp = true; + } else { timeline.set(data.move, -pos); + } vTime = timeline.time(); } } else { QDeclarativeFlickablePrivate::fixup(data, minExtent, maxExtent); } - fixupDuration = oldDuration; + fixupMode = Normal; } void QDeclarativeListViewPrivate::flick(AxisData &data, qreal minExtent, qreal maxExtent, qreal vSize, @@ -1228,6 +1257,7 @@ void QDeclarativeListViewPrivate::flick(AxisData &data, qreal minExtent, qreal m { Q_Q(QDeclarativeListView); + data.fixingUp = false; moveReason = Mouse; if ((!haveHighlightRange || highlightRange != QDeclarativeListView::StrictlyEnforceRange) && snapMode == QDeclarativeListView::NoSnap) { correctFlick = true; @@ -2231,6 +2261,9 @@ 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 +2273,7 @@ void QDeclarativeListView::setFooter(QDeclarativeComponent *footer) if (isComponentComplete()) { d->updateFooter(); d->updateViewport(); + d->fixupPosition(); } emit footerChanged(); } @@ -2265,6 +2299,9 @@ 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 +2312,7 @@ void QDeclarativeListView::setHeader(QDeclarativeComponent *header) d->updateHeader(); d->updateFooter(); d->updateViewport(); + d->fixupPosition(); } emit headerChanged(); } @@ -2558,6 +2596,78 @@ 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 +2706,43 @@ 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() + \since Quick 1.1 + + Positions the view at the beginning or end, taking into account any header or footer. + + It is not recommended to use \l {Flickable::}{contentX} or \l {Flickable::}{contentY} to position the view + at a particular index. This is unreliable since removing items from the start + of the list does not cause all other items to be repositioned, and because + the actual start of the view can vary based on the size of the delegates. + + \bold Note: methods should only be called after the Component has completed. To position + the view at startup, this method should be called by Component.onCompleted. For + example, to position the view at the end on startup: + + \code + Component.onCompleted: positionViewAtEnd() + \endcode +*/ +void 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); } /*! @@ -2670,7 +2757,7 @@ void QDeclarativeListView::positionViewAtIndex(int index, int mode) \bold Note: methods should only be called after the Component has completed. */ -int QDeclarativeListView::indexAt(int x, int y) const +int QDeclarativeListView::indexAt(qreal x, qreal y) const { Q_D(const QDeclarativeListView); for (int i = 0; i < d->visibleItems.count(); ++i) { @@ -2715,6 +2802,8 @@ void QDeclarativeListView::updateSections() roles << d->sectionCriteria->property().toUtf8(); d->model->setWatchedRoles(roles); d->updateSections(); + if (d->itemCount) + d->layout(); } } @@ -2791,23 +2880,8 @@ 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 +2917,15 @@ 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 +2992,8 @@ 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(); } @@ -3043,6 +3123,7 @@ void QDeclarativeListView::destroyRemoved() } // Correct the positioning of the items + d->updateSections(); d->layout(); } |