KItemListView::KItemListView(QGraphicsWidget* parent) :
QGraphicsWidget(parent),
+ m_enabledSelectionToggles(false),
m_grouped(false),
+ m_supportsItemExpanding(false),
m_activeTransactions(0),
+ m_endTransactionAnimationHint(Animation),
m_itemSize(),
m_controller(0),
m_model(0),
m_styleOption(),
m_visibleItems(),
m_visibleGroups(),
+ m_visibleCells(),
m_sizeHintResolver(0),
m_layouter(0),
m_animation(0),
m_layouter->setScrollOrientation(orientation);
m_animation->setScrollOrientation(orientation);
m_sizeHintResolver->clearCache();
- updateLayout();
+
+ if (m_grouped) {
+ QMutableHashIterator<KItemListWidget*, KItemListGroupHeader*> it (m_visibleGroups);
+ while (it.hasNext()) {
+ it.next();
+ it.value()->setScrollOrientation(orientation);
+ }
+ updateGroupHeaderHeight();
+
+ }
+
+ doLayout(NoAnimation);
onScrollOrientationChanged(orientation, previousOrientation);
emit scrollOrientationChanged(orientation, previousOrientation);
return;
}
+ // Skip animations when the number of rows or columns
+ // are changed in the grid layout. Although the animation
+ // engine can handle this usecase, it looks obtrusive.
+ const bool animate = !changesItemGridLayout(m_layouter->size(),
+ itemSize,
+ m_layouter->itemMargin());
+
+ const bool updateAlternateBackgrounds = (m_visibleRoles.count() > 1) &&
+ (( m_itemSize.isEmpty() && !itemSize.isEmpty()) ||
+ (!m_itemSize.isEmpty() && itemSize.isEmpty()));
+
m_itemSize = itemSize;
- const bool emptySize = itemSize.isEmpty();
- if (emptySize) {
+ if (updateAlternateBackgrounds) {
+ // For an empty item size alternate backgrounds are drawn if more than
+ // one role is shown. Assure that the backgrounds for visible items are
+ // updated when changing the size in this context.
+ QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+ while (it.hasNext()) {
+ it.next();
+ updateAlternateBackgroundForWidget(it.value());
+ }
+ }
+
+ if (itemSize.isEmpty()) {
updateVisibleRolesSizes();
} else {
- if (itemSize.width() < previousSize.width() || itemSize.height() < previousSize.height()) {
- prepareLayoutForIncreasedItemCount(itemSize, ItemSize);
- } else {
- m_layouter->setItemSize(itemSize);
- }
+ m_layouter->setItemSize(itemSize);
}
m_sizeHintResolver->clearCache();
- updateLayout();
+ doLayout(animate ? Animation : NoAnimation);
onItemSizeChanged(itemSize, previousSize);
}
m_layouter->setScrollOffset(offset);
m_animation->setScrollOffset(offset);
- if (!m_layoutTimer->isActive()) {
- doLayout(NoAnimation, 0, 0);
- update();
- }
+
+ // Don't check whether the m_layoutTimer is active: Changing the
+ // scroll offset must always trigger a synchronous layout, otherwise
+ // the smooth-scrolling might get jerky.
+ doLayout(NoAnimation);
onScrollOffsetChanged(offset, previousOffset);
}
void KItemListView::setItemOffset(qreal offset)
{
+ if (m_layouter->itemOffset() == offset) {
+ return;
+ }
+
m_layouter->setItemOffset(offset);
if (m_header) {
m_header->setPos(-offset, 0);
}
- if (!m_layoutTimer->isActive()) {
- doLayout(NoAnimation, 0, 0);
- update();
- }
+
+ // Don't check whether the m_layoutTimer is active: Changing the
+ // item offset must always trigger a synchronous layout, otherwise
+ // the smooth-scrolling might get jerky.
+ doLayout(NoAnimation);
}
qreal KItemListView::itemOffset() const
const QList<QByteArray> previousRoles = m_visibleRoles;
m_visibleRoles = roles;
+ const bool updateAlternateBackgrounds = m_itemSize.isEmpty() &&
+ ((roles.count() > 1 && previousRoles.count() <= 1) ||
+ (roles.count() <= 1 && previousRoles.count() > 1));
+
QHashIterator<int, KItemListWidget*> it(m_visibleItems);
while (it.hasNext()) {
it.next();
KItemListWidget* widget = it.value();
widget->setVisibleRoles(roles);
widget->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
+ if (updateAlternateBackgrounds) {
+ updateAlternateBackgroundForWidget(widget);
+ }
}
m_sizeHintResolver->clearCache();
}
updateVisibleRolesSizes();
- updateLayout();
+ doLayout(NoAnimation);
onVisibleRolesChanged(roles, previousRoles);
}
{
if (enabled && !m_autoScrollTimer) {
m_autoScrollTimer = new QTimer(this);
- m_autoScrollTimer->setSingleShot(false);
+ m_autoScrollTimer->setSingleShot(true);
connect(m_autoScrollTimer, SIGNAL(timeout()), this, SLOT(triggerAutoScrolling()));
m_autoScrollTimer->start(InitialAutoScrollDelay);
} else if (!enabled && m_autoScrollTimer) {
delete m_autoScrollTimer;
m_autoScrollTimer = 0;
}
-
}
bool KItemListView::autoScroll() const
return m_autoScrollTimer != 0;
}
+void KItemListView::setEnabledSelectionToggles(bool enabled)
+{
+ if (m_enabledSelectionToggles != enabled) {
+ m_enabledSelectionToggles = enabled;
+
+ QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+ while (it.hasNext()) {
+ it.next();
+ it.value()->setEnabledSelectionToggle(enabled);
+ }
+ }
+}
+
+bool KItemListView::enabledSelectionToggles() const
+{
+ return m_enabledSelectionToggles;
+}
+
KItemListController* KItemListView::controller() const
{
return m_controller;
const KItemListStyleOption previousOption = m_styleOption;
m_styleOption = option;
+ bool animate = true;
+ const QSizeF margin(option.horizontalMargin, option.verticalMargin);
+ if (margin != m_layouter->itemMargin()) {
+ // Skip animations when the number of rows or columns
+ // are changed in the grid layout. Although the animation
+ // engine can handle this usecase, it looks obtrusive.
+ animate = !changesItemGridLayout(m_layouter->size(),
+ m_layouter->itemSize(),
+ margin);
+ m_layouter->setItemMargin(margin);
+ }
+
+ if (m_grouped) {
+ updateGroupHeaderHeight();
+ }
+
QHashIterator<int, KItemListWidget*> it(m_visibleItems);
while (it.hasNext()) {
it.next();
}
m_sizeHintResolver->clearCache();
- updateLayout();
+ doLayout(animate ? Animation : NoAnimation);
+
onStyleOptionChanged(option, previousOption);
}
return;
}
- if (m_model->count() > 0) {
- prepareLayoutForIncreasedItemCount(rect.size(), LayouterSize);
+ const QSizeF newSize = rect.size();
+ if (m_itemSize.isEmpty()) {
+ // The item size is dynamic:
+ // Changing the geometry does not require to do an expensive
+ // update of the visible-roles sizes, only the stretched sizes
+ // need to be adjusted to the new size.
+ updateStretchedVisibleRolesSizes();
+
+ if (m_useHeaderWidths) {
+ QSizeF dynamicItemSize = m_layouter->itemSize();
+
+ if (m_itemSize.width() < 0) {
+ const qreal requiredWidth = visibleRolesSizesWidthSum();
+ if (newSize.width() > requiredWidth) {
+ dynamicItemSize.setWidth(newSize.width());
+ }
+ const qreal headerWidth = qMax(newSize.width(), requiredWidth);
+ m_header->resize(headerWidth, m_header->size().height());
+ }
+
+ if (m_itemSize.height() < 0) {
+ const qreal requiredHeight = visibleRolesSizesHeightSum();
+ if (newSize.height() > requiredHeight) {
+ dynamicItemSize.setHeight(newSize.height());
+ }
+ // TODO: KItemListHeader is not prepared for vertical alignment
+ }
+
+ m_layouter->setItemSize(dynamicItemSize);
+ }
+
+ // Triggering a synchronous layout is fine from a performance point of view,
+ // as with dynamic item sizes no moving animation must be done.
+ m_layouter->setSize(newSize);
+ doLayout(Animation);
} else {
- m_layouter->setSize(rect.size());
- }
+ const bool animate = !changesItemGridLayout(newSize,
+ m_layouter->itemSize(),
+ m_layouter->itemMargin());
+ m_layouter->setSize(newSize);
- if (!m_layoutTimer->isActive()) {
- m_layoutTimer->start();
+ if (animate) {
+ // Trigger an asynchronous relayout with m_layoutTimer to prevent
+ // performance bottlenecks. If the timer is exceeded, an animated layout
+ // will be triggered.
+ if (!m_layoutTimer->isActive()) {
+ m_layoutTimer->start();
+ }
+ } else {
+ m_layoutTimer->stop();
+ doLayout(NoAnimation);
+ }
}
-
- // Changing the geometry does not require to do an expensive
- // update of the visible-roles sizes, only the stretched sizes
- // need to be adjusted to the new size.
- updateStretchedVisibleRolesSizes();
}
int KItemListView::itemAt(const QPointF& pos) const
bool KItemListView::isAboveSelectionToggle(int index, const QPointF& pos) const
{
- Q_UNUSED(index);
- Q_UNUSED(pos);
+ if (!m_enabledSelectionToggles) {
+ return false;
+ }
+
+ const KItemListWidget* widget = m_visibleItems.value(index);
+ if (widget) {
+ const QRectF selectionToggleRect = widget->selectionToggleRect();
+ if (!selectionToggleRect.isEmpty()) {
+ const QPointF mappedPos = widget->mapFromItem(this, pos);
+ return selectionToggleRect.contains(mappedPos);
+ }
+ }
return false;
}
return QHash<QByteArray, QSizeF>();
}
-QRectF KItemListView::itemBoundingRect(int index) const
+void KItemListView::setSupportsItemExpanding(bool supportsExpanding)
+{
+ if (m_supportsItemExpanding != supportsExpanding) {
+ m_supportsItemExpanding = supportsExpanding;
+ updateSiblingsInformation();
+ onSupportsItemExpandingChanged(supportsExpanding);
+ }
+}
+
+bool KItemListView::supportsItemExpanding() const
+{
+ return m_supportsItemExpanding;
+}
+
+QRectF KItemListView::itemRect(int index) const
{
- return m_layouter->itemBoundingRect(index);
+ return m_layouter->itemRect(index);
}
-int KItemListView::itemsPerOffset() const
+QRectF KItemListView::itemContextRect(int index) const
{
- return m_layouter->itemsPerOffset();
+ QRectF contextRect;
+
+ const KItemListWidget* widget = m_visibleItems.value(index);
+ if (widget) {
+ contextRect = widget->iconRect() | widget->textRect();
+ contextRect.translate(itemRect(index).topLeft());
+ }
+
+ return contextRect;
+}
+
+void KItemListView::scrollToItem(int index)
+{
+ QRectF viewGeometry = geometry();
+ if (m_header) {
+ const qreal headerHeight = m_header->size().height();
+ viewGeometry.adjust(0, headerHeight, 0, 0);
+ }
+ const QRectF currentRect = itemRect(index);
+
+ if (!viewGeometry.contains(currentRect)) {
+ qreal newOffset = scrollOffset();
+ if (scrollOrientation() == Qt::Vertical) {
+ if (currentRect.top() < viewGeometry.top()) {
+ newOffset += currentRect.top() - viewGeometry.top();
+ } else if (currentRect.bottom() > viewGeometry.bottom()) {
+ newOffset += currentRect.bottom() - viewGeometry.bottom();
+ }
+ } else {
+ if (currentRect.left() < viewGeometry.left()) {
+ newOffset += currentRect.left() - viewGeometry.left();
+ } else if (currentRect.right() > viewGeometry.right()) {
+ newOffset += currentRect.right() - viewGeometry.right();
+ }
+ }
+
+ if (newOffset != scrollOffset()) {
+ emit scrollTo(newOffset);
+ }
+ }
}
void KItemListView::beginTransaction()
if (m_activeTransactions == 0) {
onTransactionEnd();
- updateLayout();
+ doLayout(m_endTransactionAnimationHint);
+ m_endTransactionAnimationHint = Animation;
}
}
return m_activeTransactions > 0;
}
-
void KItemListView::setHeaderShown(bool show)
{
m_header->setVisibleRolesWidths(headerRolesWidths());
m_header->setZValue(1);
- m_useHeaderWidths = false;
-
connect(m_header, SIGNAL(visibleRoleWidthChanged(QByteArray,qreal,qreal)),
this, SLOT(slotVisibleRoleWidthChanged(QByteArray,qreal,qreal)));
+ connect(m_header, SIGNAL(visibleRoleMoved(QByteArray,int,int)),
+ this, SLOT(slotVisibleRoleMoved(QByteArray,int,int)));
+ connect(m_header, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)),
+ this, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)));
+ connect(m_header, SIGNAL(sortRoleChanged(QByteArray,QByteArray)),
+ this, SIGNAL(sortRoleChanged(QByteArray,QByteArray)));
+
+ m_useHeaderWidths = false;
m_layouter->setHeaderHeight(m_header->size().height());
} else if (!show && m_header) {
Q_UNUSED(previous);
}
+void KItemListView::onSupportsItemExpandingChanged(bool supportsExpanding)
+{
+ Q_UNUSED(supportsExpanding);
+}
+
void KItemListView::onTransactionBegin()
{
}
return m_visibleItems.values();
}
-void KItemListView::resizeEvent(QGraphicsSceneResizeEvent* event)
-{
- QGraphicsWidget::resizeEvent(event);
- if (m_itemSize.isEmpty() && m_useHeaderWidths) {
- QSizeF dynamicItemSize = m_layouter->itemSize();
- const QSizeF newSize = event->newSize();
-
- if (m_itemSize.width() < 0) {
- const qreal requiredWidth = visibleRolesSizesWidthSum();
- if (newSize.width() > requiredWidth) {
- dynamicItemSize.setWidth(newSize.width());
- }
- const qreal headerWidth = qMax(newSize.width(), requiredWidth);
- m_header->resize(headerWidth, m_header->size().height());
- }
-
- if (m_itemSize.height() < 0) {
- const qreal requiredHeight = visibleRolesSizesHeightSum();
- if (newSize.height() > requiredHeight) {
- dynamicItemSize.setHeight(newSize.height());
- }
- // TODO: KItemListHeader is not prepared for vertical alignment
- }
-
- m_layouter->setItemSize(dynamicItemSize);
- }
-}
-
void KItemListView::slotItemsInserted(const KItemRangeList& itemRanges)
{
updateVisibleRolesSizes(itemRanges);
beginTransaction();
}
+ m_layouter->markAsDirty();
+
int previouslyInsertedCount = 0;
foreach (const KItemRange& range, itemRanges) {
// range.index is related to the model before anything has been inserted.
for (int i = itemsToMove.count() - 1; i >= 0; --i) {
KItemListWidget* widget = m_visibleItems.value(itemsToMove[i]);
Q_ASSERT(widget);
- setWidgetIndex(widget, widget->index() + count);
+ const int newIndex = widget->index() + count;
+ if (hasMultipleRanges) {
+ setWidgetIndex(widget, newIndex);
+ } else {
+ // Try to animate the moving of the item
+ moveWidgetToIndex(widget, newIndex);
+ }
}
- m_layouter->markAsDirty();
- if (m_model->count() == count && maximumScrollOffset() > size().height()) {
- kDebug() << "Scrollbar required, skipping layout";
- const int scrollBarExtent = style()->pixelMetric(QStyle::PM_ScrollBarExtent);
- QSizeF layouterSize = m_layouter->size();
- if (scrollOrientation() == Qt::Vertical) {
- layouterSize.rwidth() -= scrollBarExtent;
- } else {
- layouterSize.rheight() -= scrollBarExtent;
+ if (m_model->count() == count && m_activeTransactions == 0) {
+ // Check whether a scrollbar is required to show the inserted items. In this case
+ // the size of the layouter will be decreased before calling doLayout(): This prevents
+ // an unnecessary temporary animation due to the geometry change of the inserted scrollbar.
+ const bool verticalScrollOrientation = (scrollOrientation() == Qt::Vertical);
+ const bool decreaseLayouterSize = ( verticalScrollOrientation && maximumScrollOffset() > size().height()) ||
+ (!verticalScrollOrientation && maximumScrollOffset() > size().width());
+ if (decreaseLayouterSize) {
+ const int scrollBarExtent = style()->pixelMetric(QStyle::PM_ScrollBarExtent);
+ QSizeF layouterSize = m_layouter->size();
+ if (verticalScrollOrientation) {
+ layouterSize.rwidth() -= scrollBarExtent;
+ } else {
+ layouterSize.rheight() -= scrollBarExtent;
+ }
+ m_layouter->setSize(layouterSize);
}
- m_layouter->setSize(layouterSize);
}
if (!hasMultipleRanges) {
- doLayout(Animation, index, count);
- update();
+ doLayout(animateChangedItemCount(count) ? Animation : NoAnimation, index, count);
+ updateSiblingsInformation();
}
}
}
if (hasMultipleRanges) {
+#ifndef QT_NO_DEBUG
+ // Important: Don't read any m_layouter-property inside the for-loop in case if
+ // multiple ranges are given! m_layouter accesses m_sizeHintResolver which is
+ // updated in each loop-cycle and has only a consistent state after the loop.
+ Q_ASSERT(m_layouter->isDirty());
+#endif
+ m_endTransactionAnimationHint = NoAnimation;
endTransaction();
+ updateSiblingsInformation();
}
}
beginTransaction();
}
+ m_layouter->markAsDirty();
+
for (int i = itemRanges.count() - 1; i >= 0; --i) {
const KItemRange& range = itemRanges.at(i);
const int index = range.index;
continue;
}
- if (m_model->count() == 0) {
- // For performance reasons no animation is done when all items have
- // been removed.
+ if (m_model->count() == 0 || hasMultipleRanges || !animateChangedItemCount(count)) {
+ // Remove the widget without animation
recycleWidget(widget);
} else {
// Animate the removing of the items. Special case: When removing an item there
KItemListWidget* widget = m_visibleItems.value(i);
if (widget) {
const int newIndex = i - count;
- setWidgetIndex(widget, newIndex);
+ if (hasMultipleRanges) {
+ setWidgetIndex(widget, newIndex);
+ } else {
+ // Try to animate the moving of the item
+ moveWidgetToIndex(widget, newIndex);
+ }
}
}
- m_layouter->markAsDirty();
if (!hasMultipleRanges) {
- doLayout(Animation, index, -count);
- update();
+ // The decrease-layout-size optimization in KItemListView::slotItemsInserted()
+ // assumes an updated geometry. If items are removed during an active transaction,
+ // the transaction will be temporary deactivated so that doLayout() triggers a
+ // geometry update if necessary.
+ const int activeTransactions = m_activeTransactions;
+ m_activeTransactions = 0;
+ doLayout(animateChangedItemCount(count) ? Animation : NoAnimation, index, -count);
+ m_activeTransactions = activeTransactions;
+ updateSiblingsInformation();
}
}
}
if (hasMultipleRanges) {
+#ifndef QT_NO_DEBUG
+ // Important: Don't read any m_layouter-property inside the for-loop in case if
+ // multiple ranges are given! m_layouter accesses m_sizeHintResolver which is
+ // updated in each loop-cycle and has only a consistent state after the loop.
+ Q_ASSERT(m_layouter->isDirty());
+#endif
+ m_endTransactionAnimationHint = NoAnimation;
endTransaction();
+ updateSiblingsInformation();
}
}
void KItemListView::slotItemsMoved(const KItemRange& itemRange, const QList<int>& movedToIndexes)
{
+ m_sizeHintResolver->itemsMoved(itemRange.index, itemRange.count);
+ m_layouter->markAsDirty();
+
+ if (m_controller) {
+ m_controller->selectionManager()->itemsMoved(itemRange, movedToIndexes);
+ }
+
const int firstVisibleMovedIndex = qMax(firstVisibleIndex(), itemRange.index);
const int lastVisibleMovedIndex = qMin(lastVisibleIndex(), itemRange.index + itemRange.count - 1);
KItemListWidget* widget = m_visibleItems.value(index);
if (widget) {
updateWidgetProperties(widget, index);
+ initializeItemListWidget(widget);
}
}
- if (m_controller) {
- m_controller->selectionManager()->itemsMoved(itemRange, movedToIndexes);
- }
+ doLayout(NoAnimation);
+ updateSiblingsInformation();
}
void KItemListView::slotItemsChanged(const KItemRangeList& itemRanges,
if (updateSizeHints) {
m_sizeHintResolver->itemsChanged(index, count, roles);
m_layouter->markAsDirty();
+
if (!m_layoutTimer->isActive()) {
m_layoutTimer->start();
}
}
}
+ if (m_grouped && roles.contains(m_model->sortRole())) {
+ // The sort-role has been changed which might result
+ // in modified group headers
+ updateVisibleGroupHeaders();
+ doLayout(NoAnimation);
+ }
}
}
void KItemListView::slotGroupedSortingChanged(bool current)
{
m_grouped = current;
+ m_layouter->markAsDirty();
+
if (m_grouped) {
- // Assure that headers from already visible items get created
- QHashIterator<int, KItemListWidget*> it(m_visibleItems);
- while (it.hasNext()) {
- it.next();
- KItemListWidget* widget = it.value();
- updateGroupHeaderForWidget(widget);
- }
+ updateGroupHeaderHeight();
} else {
// Clear all visible headers
QMutableHashIterator<KItemListWidget*, KItemListGroupHeader*> it (m_visibleGroups);
Q_ASSERT(m_visibleGroups.isEmpty());
}
- m_layouter->markAsDirty();
- updateLayout();
+ if (useAlternateBackgrounds()) {
+ // Changing the group mode requires to update the alternate backgrounds
+ // as with the enabled group mode the altering is done on base of the first
+ // group item.
+ QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+ while (it.hasNext()) {
+ it.next();
+ updateAlternateBackgroundForWidget(it.value());
+ }
+ }
+
+ updateSiblingsInformation();
+ doLayout(NoAnimation);
+}
+
+void KItemListView::slotSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous)
+{
+ Q_UNUSED(current);
+ Q_UNUSED(previous);
+ if (m_grouped) {
+ updateVisibleGroupHeaders();
+ doLayout(NoAnimation);
+ }
+}
+
+void KItemListView::slotSortRoleChanged(const QByteArray& current, const QByteArray& previous)
+{
+ Q_UNUSED(current);
+ Q_UNUSED(previous);
+ if (m_grouped) {
+ updateVisibleGroupHeaders();
+ doLayout(NoAnimation);
+ }
}
void KItemListView::slotCurrentChanged(int current, int previous)
KItemListWidget* previousWidget = m_visibleItems.value(previous, 0);
if (previousWidget) {
- Q_ASSERT(previousWidget->isCurrent());
previousWidget->setCurrent(false);
}
KItemListWidget* currentWidget = m_visibleItems.value(current, 0);
if (currentWidget) {
- Q_ASSERT(!currentWidget->isCurrent());
currentWidget->setCurrent(true);
}
-
- const QRectF viewGeometry = geometry();
- const QRectF currentBoundingRect = itemBoundingRect(current);
-
- if (!viewGeometry.contains(currentBoundingRect)) {
- // Make sure that the new current item is fully visible in the view.
- qreal newOffset = scrollOffset();
- if (currentBoundingRect.top() < viewGeometry.top()) {
- Q_ASSERT(scrollOrientation() == Qt::Vertical);
- newOffset += currentBoundingRect.top() - viewGeometry.top();
- } else if ((currentBoundingRect.bottom() > viewGeometry.bottom())) {
- Q_ASSERT(scrollOrientation() == Qt::Vertical);
- newOffset += currentBoundingRect.bottom() - viewGeometry.bottom();
- } else if (currentBoundingRect.left() < viewGeometry.left()) {
- if (scrollOrientation() == Qt::Horizontal) {
- newOffset += currentBoundingRect.left() - viewGeometry.left();
- }
- } else if ((currentBoundingRect.right() > viewGeometry.right())) {
- if (scrollOrientation() == Qt::Horizontal) {
- newOffset += currentBoundingRect.right() - viewGeometry.right();
- }
- }
-
- if (newOffset != scrollOffset()) {
- emit scrollTo(newOffset);
- }
- }
}
void KItemListView::slotSelectionChanged(const QSet<int>& current, const QSet<int>& previous)
void KItemListView::slotLayoutTimerFinished()
{
m_layouter->setSize(geometry().size());
- doLayout(Animation, 0, 0);
+ doLayout(Animation);
}
void KItemListView::slotRubberBandPosChanged()
m_layouter->setItemSize(dynamicItemSize);
// Update the role sizes for all visible widgets
- foreach (KItemListWidget* widget, visibleItemListWidgets()) {
- widget->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
+ QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+ while (it.hasNext()) {
+ it.next();
+ it.value()->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
}
-
- updateLayout();
+ doLayout(NoAnimation);
}
}
+void KItemListView::slotVisibleRoleMoved(const QByteArray& role,
+ int currentIndex,
+ int previousIndex)
+{
+ Q_ASSERT(m_visibleRoles[previousIndex] == role);
+
+ const QList<QByteArray> previous = m_visibleRoles;
+
+ QList<QByteArray> current = m_visibleRoles;
+ current.removeAt(previousIndex);
+ current.insert(currentIndex, role);
+
+ setVisibleRoles(current);
+
+ emit visibleRolesChanged(current, previous);
+}
+
void KItemListView::triggerAutoScrolling()
{
if (!m_autoScrollTimer) {
// the autoscrolling may not get skipped anymore until a new rubberband is created
m_skipAutoScrollForRubberBand = false;
- setScrollOffset(scrollOffset() + m_autoScrollIncrement);
+ const qreal maxVisibleOffset = qMax(qreal(0), maximumScrollOffset() - visibleSize);
+ const qreal newScrollOffset = qMin(scrollOffset() + m_autoScrollIncrement, maxVisibleOffset);
+ setScrollOffset(newScrollOffset);
// Trigger the autoscroll timer which will periodically call
// triggerAutoScrolling()
m_autoScrollTimer->start(RepeatingAutoScrollDelay);
}
+void KItemListView::slotGeometryOfGroupHeaderParentChanged()
+{
+ KItemListWidget* widget = qobject_cast<KItemListWidget*>(sender());
+ Q_ASSERT(widget);
+ KItemListGroupHeader* groupHeader = m_visibleGroups.value(widget);
+ Q_ASSERT(groupHeader);
+ updateGroupHeaderLayout(widget);
+}
+
void KItemListView::setController(KItemListController* controller)
{
if (m_controller != controller) {
this, SLOT(slotItemsMoved(KItemRange,QList<int>)));
disconnect(m_model, SIGNAL(groupedSortingChanged(bool)),
this, SLOT(slotGroupedSortingChanged(bool)));
+ disconnect(m_model, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)),
+ this, SLOT(slotSortOrderChanged(Qt::SortOrder,Qt::SortOrder)));
+ disconnect(m_model, SIGNAL(sortRoleChanged(QByteArray,QByteArray)),
+ this, SLOT(slotSortRoleChanged(QByteArray,QByteArray)));
}
m_model = model;
this, SLOT(slotItemsMoved(KItemRange,QList<int>)));
connect(m_model, SIGNAL(groupedSortingChanged(bool)),
this, SLOT(slotGroupedSortingChanged(bool)));
+ connect(m_model, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)),
+ this, SLOT(slotSortOrderChanged(Qt::SortOrder,Qt::SortOrder)));
+ connect(m_model, SIGNAL(sortRoleChanged(QByteArray,QByteArray)),
+ this, SLOT(slotSortRoleChanged(QByteArray,QByteArray)));
}
onModelChanged(model, previous);
return m_rubberBand;
}
-void KItemListView::updateLayout()
-{
- doLayout(Animation, 0, 0);
- update();
-}
-
void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int changedCount)
{
if (m_layoutTimer->isActive()) {
- kDebug() << "Stopping layout timer, synchronous layout requested";
m_layoutTimer->stop();
}
- if (m_model->count() < 0 || m_activeTransactions > 0) {
+ if (m_activeTransactions > 0) {
+ if (hint == NoAnimation) {
+ // As soon as at least one property change should be done without animation,
+ // the whole transaction will be marked as not animated.
+ m_endTransactionAnimationHint = NoAnimation;
+ }
return;
}
- const int firstVisibleIndex = m_layouter->firstVisibleIndex();
- const int lastVisibleIndex = m_layouter->lastVisibleIndex();
+ if (!m_model || m_model->count() < 0) {
+ return;
+ }
+
+ int firstVisibleIndex = m_layouter->firstVisibleIndex();
if (firstVisibleIndex < 0) {
emitOffsetChanges();
return;
const qreal maxOffsetToShowFullRange = maximumScrollOffset() - visibleOffsetRange;
if (scrollOffset() > maxOffsetToShowFullRange) {
m_layouter->setScrollOffset(qMax(qreal(0), maxOffsetToShowFullRange));
+ firstVisibleIndex = m_layouter->firstVisibleIndex();
}
- // Determine all items that are completely invisible and might be
- // reused for items that just got (at least partly) visible.
- // Items that do e.g. an animated moving of their position are not
- // marked as invisible: This assures that a scrolling inside the view
- // can be done without breaking an animation.
- QList<int> reusableItems;
- QHashIterator<int, KItemListWidget*> it(m_visibleItems);
- while (it.hasNext()) {
- it.next();
- KItemListWidget* widget = it.value();
- const int index = widget->index();
- const bool invisible = (index < firstVisibleIndex) || (index > lastVisibleIndex);
- if (invisible && !m_animation->isStarted(widget)) {
- widget->setVisible(false);
- reusableItems.append(index);
- }
- }
+ const int lastVisibleIndex = m_layouter->lastVisibleIndex();
+
+ int firstSibblingIndex = -1;
+ int lastSibblingIndex = -1;
+ const bool supportsExpanding = supportsItemExpanding();
+
+ QList<int> reusableItems = recycleInvisibleItems(firstVisibleIndex, lastVisibleIndex, hint);
// Assure that for each visible item a KItemListWidget is available. KItemListWidget
// instances from invisible items are reused. If no reusable items are
bool applyNewPos = true;
bool wasHidden = false;
- const QRectF itemBounds = m_layouter->itemBoundingRect(i);
+ const QRectF itemBounds = m_layouter->itemRect(i);
const QPointF newPos = itemBounds.topLeft();
KItemListWidget* widget = m_visibleItems.value(i);
if (!widget) {
const int oldIndex = reusableItems.takeLast();
widget = m_visibleItems.value(oldIndex);
setWidgetIndex(widget, i);
+ updateWidgetProperties(widget, i);
+ initializeItemListWidget(widget);
} else {
// No reusable KItemListWidget instance is available, create a new one
widget = createWidget(i);
if (animate && changedCount < 0) {
// Items have been deleted, move the created item to the
- // imaginary old position.
- const QRectF itemBoundingRect = m_layouter->itemBoundingRect(i - changedCount);
- if (itemBoundingRect.isEmpty()) {
+ // imaginary old position. They will get animated to the new position
+ // later.
+ const QRectF itemRect = m_layouter->itemRect(i - changedCount);
+ if (itemRect.isEmpty()) {
const QPointF invisibleOldPos = (scrollOrientation() == Qt::Vertical)
? QPointF(0, size().height()) : QPointF(size().width(), 0);
widget->setPos(invisibleOldPos);
} else {
- widget->setPos(itemBoundingRect.topLeft());
+ widget->setPos(itemRect.topLeft());
}
applyNewPos = false;
}
- } else if (m_animation->isStarted(widget, KItemListViewAnimation::MovingAnimation)) {
- applyNewPos = false;
+
+ if (supportsExpanding && changedCount == 0) {
+ if (firstSibblingIndex < 0) {
+ firstSibblingIndex = i;
+ }
+ lastSibblingIndex = i;
+ }
}
if (animate) {
const bool itemsRemoved = (changedCount < 0);
const bool itemsInserted = (changedCount > 0);
-
if (itemsRemoved && (i >= changedIndex + changedCount + 1)) {
// The item is located after the removed items. Animate the moving of the position.
- m_animation->start(widget, KItemListViewAnimation::MovingAnimation, newPos);
- applyNewPos = false;
+ applyNewPos = !moveWidget(widget, newPos);
} else if (itemsInserted && i >= changedIndex) {
// The item is located after the first inserted item
if (i <= changedIndex + changedCount - 1) {
// The item was already there before, so animate the moving of the position.
// No moving animation is done if the item is animated by a create animation: This
// prevents a "move animation mess" when inserting several ranges in parallel.
- m_animation->start(widget, KItemListViewAnimation::MovingAnimation, newPos);
- applyNewPos = false;
+ applyNewPos = !moveWidget(widget, newPos);
}
} else if (!itemsRemoved && !itemsInserted && !wasHidden) {
// The size of the view might have been changed. Animate the moving of the position.
- m_animation->start(widget, KItemListViewAnimation::MovingAnimation, newPos);
- applyNewPos = false;
+ applyNewPos = !moveWidget(widget, newPos);
}
+ } else {
+ m_animation->stop(widget);
}
if (applyNewPos) {
widget->setVisible(true);
if (widget->size() != itemBounds.size()) {
- m_animation->start(widget, KItemListViewAnimation::ResizeAnimation, itemBounds.size());
+ // Resize the widget for the item to the changed size.
+ if (animate) {
+ // If a dynamic item size is used then no animation is done in the direction
+ // of the dynamic size.
+ if (m_itemSize.width() <= 0) {
+ // The width is dynamic, apply the new width without animation.
+ widget->resize(itemBounds.width(), widget->size().height());
+ } else if (m_itemSize.height() <= 0) {
+ // The height is dynamic, apply the new height without animation.
+ widget->resize(widget->size().width(), itemBounds.height());
+ }
+ m_animation->start(widget, KItemListViewAnimation::ResizeAnimation, itemBounds.size());
+ } else {
+ widget->resize(itemBounds.size());
+ }
}
+
+ // Updating the cell-information must be done as last step: The decision whether the
+ // moving-animation should be started at all is based on the previous cell-information.
+ const Cell cell(m_layouter->itemColumn(i), m_layouter->itemRow(i));
+ m_visibleCells.insert(i, cell);
}
// Delete invisible KItemListWidget instances that have not been reused
recycleWidget(m_visibleItems.value(index));
}
+ if (supportsExpanding && firstSibblingIndex >= 0) {
+ Q_ASSERT(lastSibblingIndex >= 0);
+ updateSiblingsInformation(firstSibblingIndex, lastSibblingIndex);
+ }
+
+ if (m_grouped) {
+ // Update the layout of all visible group headers
+ QHashIterator<KItemListWidget*, KItemListGroupHeader*> it(m_visibleGroups);
+ while (it.hasNext()) {
+ it.next();
+ updateGroupHeaderLayout(it.key());
+ }
+ }
+
emitOffsetChanges();
}
+QList<int> KItemListView::recycleInvisibleItems(int firstVisibleIndex,
+ int lastVisibleIndex,
+ LayoutAnimationHint hint)
+{
+ // Determine all items that are completely invisible and might be
+ // reused for items that just got (at least partly) visible. If the
+ // animation hint is set to 'Animation' items that do e.g. an animated
+ // moving of their position are not marked as invisible: This assures
+ // that a scrolling inside the view can be done without breaking an animation.
+
+ QList<int> items;
+
+ QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+ while (it.hasNext()) {
+ it.next();
+
+ KItemListWidget* widget = it.value();
+ const int index = widget->index();
+ const bool invisible = (index < firstVisibleIndex) || (index > lastVisibleIndex);
+
+ if (invisible) {
+ if (m_animation->isStarted(widget)) {
+ if (hint == NoAnimation) {
+ // Stopping the animation will call KItemListView::slotAnimationFinished()
+ // and the widget will be recycled if necessary there.
+ m_animation->stop(widget);
+ }
+ } else {
+ widget->setVisible(false);
+ items.append(index);
+
+ if (m_grouped) {
+ recycleGroupHeaderForWidget(widget);
+ }
+ }
+ }
+ }
+
+ return items;
+}
+
+bool KItemListView::moveWidget(KItemListWidget* widget,const QPointF& newPos)
+{
+ if (widget->pos() == newPos) {
+ return false;
+ }
+
+ bool startMovingAnim = false;
+
+ // When having a grid the moving-animation should only be started, if it is done within
+ // one row in the vertical scroll-orientation or one column in the horizontal scroll-orientation.
+ // Otherwise instead of a moving-animation a create-animation on the new position will be used
+ // instead. This is done to prevent overlapping (and confusing) moving-animations.
+ const int index = widget->index();
+ const Cell cell = m_visibleCells.value(index);
+ if (cell.column >= 0 && cell.row >= 0) {
+ if (scrollOrientation() == Qt::Vertical) {
+ startMovingAnim = (cell.row == m_layouter->itemRow(index));
+ } else {
+ startMovingAnim = (cell.column == m_layouter->itemColumn(index));
+ }
+ }
+
+ if (startMovingAnim) {
+ m_animation->start(widget, KItemListViewAnimation::MovingAnimation, newPos);
+ return true;
+ }
+
+ m_animation->stop(widget);
+ m_animation->start(widget, KItemListViewAnimation::CreateAnimation);
+ return false;
+}
+
void KItemListView::emitOffsetChanges()
{
const qreal newScrollOffset = m_layouter->scrollOffset();
KItemListWidget* widget = m_widgetCreator->create(this);
widget->setFlag(QGraphicsItem::ItemStacksBehindParent);
- updateWidgetProperties(widget, index);
m_visibleItems.insert(index, widget);
-
- if (m_grouped) {
- updateGroupHeaderForWidget(widget);
- }
-
+ m_visibleCells.insert(index, Cell());
+ updateWidgetProperties(widget, index);
initializeItemListWidget(widget);
return widget;
}
recycleGroupHeaderForWidget(widget);
}
- m_visibleItems.remove(widget->index());
+ const int index = widget->index();
+ m_visibleItems.remove(index);
+ m_visibleCells.remove(index);
+
m_widgetCreator->recycle(widget);
}
{
const int oldIndex = widget->index();
m_visibleItems.remove(oldIndex);
- updateWidgetProperties(widget, index);
- m_visibleItems.insert(index, widget);
+ m_visibleCells.remove(oldIndex);
- if (m_grouped) {
- updateGroupHeaderForWidget(widget);
- }
+ m_visibleItems.insert(index, widget);
+ m_visibleCells.insert(index, Cell());
- initializeItemListWidget(widget);
+ widget->setIndex(index);
}
-void KItemListView::prepareLayoutForIncreasedItemCount(const QSizeF& size, SizeType sizeType)
+void KItemListView::moveWidgetToIndex(KItemListWidget* widget, int index)
{
- // Calculate the first visible index and last visible index for the current size
- const int currentFirst = m_layouter->firstVisibleIndex();
- const int currentLast = m_layouter->lastVisibleIndex();
-
- const QSizeF currentSize = (sizeType == LayouterSize) ? m_layouter->size() : m_layouter->itemSize();
-
- // Calculate the first visible index and last visible index for the new size
- setLayouterSize(size, sizeType);
- const int newFirst = m_layouter->firstVisibleIndex();
- const int newLast = m_layouter->lastVisibleIndex();
-
- if ((currentFirst != newFirst) || (currentLast != newLast)) {
- // At least one index has been changed. Assure that widgets for all possible
- // visible items get created so that a move-animation can be started later.
- const int maxVisibleItems = m_layouter->maximumVisibleItems();
- int minFirst = qMin(newFirst, currentFirst);
- const int maxLast = qMax(newLast, currentLast);
-
- if (maxLast - minFirst + 1 < maxVisibleItems) {
- // Increasing the size might result in a smaller KItemListView::offset().
- // Decrease the first visible index in a way that at least the maximum
- // visible items are shown.
- minFirst = qMax(0, maxLast - maxVisibleItems + 1);
- }
+ const int oldIndex = widget->index();
+ const Cell oldCell = m_visibleCells.value(oldIndex);
- if (maxLast - minFirst > maxVisibleItems + maxVisibleItems / 2) {
- // The creating of widgets is quite expensive. Assure that never more
- // than 50 % of the maximum visible items get created for the animations.
- return;
- }
+ setWidgetIndex(widget, index);
- setLayouterSize(currentSize, sizeType);
- for (int i = minFirst; i <= maxLast; ++i) {
- if (!m_visibleItems.contains(i)) {
- KItemListWidget* widget = createWidget(i);
- const QPointF pos = m_layouter->itemBoundingRect(i).topLeft();
- widget->setPos(pos);
- }
- }
- setLayouterSize(size, sizeType);
+ const Cell newCell(m_layouter->itemColumn(index), m_layouter->itemRow(index));
+ const bool vertical = (scrollOrientation() == Qt::Vertical);
+ const bool updateCell = (vertical && oldCell.row == newCell.row) ||
+ (!vertical && oldCell.column == newCell.column);
+ if (updateCell) {
+ m_visibleCells.insert(index, newCell);
}
}
widget->setCurrent(index == selectionManager->currentItem());
widget->setSelected(selectionManager->isSelected(index));
widget->setHovered(false);
- widget->setAlternatingBackgroundColors(false);
+ widget->setEnabledSelectionToggle(enabledSelectionToggles());
widget->setIndex(index);
widget->setData(m_model->data(index));
+ widget->setSiblingsInformation(QBitArray());
+ updateAlternateBackgroundForWidget(widget);
+
+ if (m_grouped) {
+ updateGroupHeaderForWidget(widget);
+ }
}
void KItemListView::updateGroupHeaderForWidget(KItemListWidget* widget)
{
+ Q_ASSERT(m_grouped);
+
const int index = widget->index();
if (!m_layouter->isFirstGroupItem(index)) {
// The widget does not represent the first item of a group
return;
}
+ const QList<QPair<int, QVariant> > groups = model()->groups();
+ if (groups.isEmpty()) {
+ return;
+ }
+
+ KItemListGroupHeader* groupHeader = m_visibleGroups.value(widget);
+ if (!groupHeader) {
+ groupHeader = m_groupHeaderCreator->create(this);
+ groupHeader->setParentItem(widget);
+ m_visibleGroups.insert(widget, groupHeader);
+ connect(widget, SIGNAL(geometryChanged()), this, SLOT(slotGeometryOfGroupHeaderParentChanged()));
+ }
+ Q_ASSERT(groupHeader->parentItem() == widget);
+
+ const int groupIndex = groupIndexForItem(index);
+ Q_ASSERT(groupIndex >= 0);
+ groupHeader->setData(groups.at(groupIndex).second);
+ groupHeader->setRole(model()->sortRole());
+ groupHeader->setStyleOption(m_styleOption);
+ groupHeader->setScrollOrientation(scrollOrientation());
+ groupHeader->setItemIndex(index);
+
+ groupHeader->show();
+}
+
+void KItemListView::updateGroupHeaderLayout(KItemListWidget* widget)
+{
+ KItemListGroupHeader* groupHeader = m_visibleGroups.value(widget);
+ Q_ASSERT(groupHeader);
+
+ const int index = widget->index();
+ const QRectF groupHeaderRect = m_layouter->groupHeaderRect(index);
+ const QRectF itemRect = m_layouter->itemRect(index);
+
+ // The group-header is a child of the itemlist widget. Translate the
+ // group header position to the relative position.
+ if (scrollOrientation() == Qt::Vertical) {
+ // In the vertical scroll orientation the group header should always span
+ // the whole width no matter which temporary position the parent widget
+ // has. In this case the x-position and width will be adjusted manually.
+ groupHeader->setPos(-widget->x(), -groupHeaderRect.height());
+ groupHeader->resize(size().width(), groupHeaderRect.size().height());
+ } else {
+ groupHeader->setPos(groupHeaderRect.x() - itemRect.x(), -widget->y());
+ groupHeader->resize(groupHeaderRect.size());
+ }
+}
+
+void KItemListView::recycleGroupHeaderForWidget(KItemListWidget* widget)
+{
KItemListGroupHeader* header = m_visibleGroups.value(widget);
- if (!header) {
- header = m_groupHeaderCreator->create(this);
- header->setParentItem(widget);
- m_visibleGroups.insert(widget, header);
+ if (header) {
+ header->setParentItem(0);
+ m_groupHeaderCreator->recycle(header);
+ m_visibleGroups.remove(widget);
+ disconnect(widget, SIGNAL(geometryChanged()), this, SLOT(slotGeometryOfGroupHeaderParentChanged()));
+ }
+}
+
+void KItemListView::updateVisibleGroupHeaders()
+{
+ Q_ASSERT(m_grouped);
+ m_layouter->markAsDirty();
+
+ QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+ while (it.hasNext()) {
+ it.next();
+ updateGroupHeaderForWidget(it.value());
}
- Q_ASSERT(header->parentItem() == widget);
+}
- // TODO:
- header->show();
- header->setPos(0, -50);
- header->resize(200, 50);
- header->setRole(model()->sortRole());
+int KItemListView::groupIndexForItem(int index) const
+{
+ Q_ASSERT(m_grouped);
- // Determine the shown data for the header by doing a binary
- // search in the groups-list
const QList<QPair<int, QVariant> > groups = model()->groups();
+ if (groups.isEmpty()) {
+ return -1;
+ }
+
int min = 0;
int max = groups.count() - 1;
int mid = 0;
do {
mid = (min + max) / 2;
- if (index > groups.at(mid).first) {
+ if (index > groups[mid].first) {
min = mid + 1;
} else {
max = mid - 1;
}
- } while (groups.at(mid).first != index && min <= max);
- header->setData(groups.at(mid).second);
+ } while (groups[mid].first != index && min <= max);
+
+ if (min > max) {
+ while (groups[mid].first > index && mid > 0) {
+ --mid;
+ }
+ }
+
+ return mid;
}
-void KItemListView::recycleGroupHeaderForWidget(KItemListWidget* widget)
+void KItemListView::updateAlternateBackgroundForWidget(KItemListWidget* widget)
{
- KItemListGroupHeader* header = m_visibleGroups.value(widget);
- if (header) {
- header->setParentItem(0);
- m_groupHeaderCreator->recycle(header);
- m_visibleGroups.remove(widget);
+ bool enabled = useAlternateBackgrounds();
+ if (enabled) {
+ const int index = widget->index();
+ enabled = (index & 0x1) > 0;
+ if (m_grouped) {
+ const int groupIndex = groupIndexForItem(index);
+ if (groupIndex >= 0) {
+ const QList<QPair<int, QVariant> > groups = model()->groups();
+ const int indexOfFirstGroupItem = groups[groupIndex].first;
+ const int relativeIndex = index - indexOfFirstGroupItem;
+ enabled = (relativeIndex & 0x1) > 0;
+ }
+ }
}
+ widget->setAlternateBackground(enabled);
+}
+
+bool KItemListView::useAlternateBackgrounds() const
+{
+ return m_itemSize.isEmpty() && m_visibleRoles.count() > 1;
}
QHash<QByteArray, qreal> KItemListView::headerRolesWidths() const
void KItemListView::updateVisibleRolesSizes()
{
+ if (!m_model) {
+ return;
+ }
+
const int itemCount = m_model->count();
if (itemCount > 0) {
updateVisibleRolesSizes(KItemRangeList() << KItemRange(0, itemCount));
void KItemListView::updateStretchedVisibleRolesSizes()
{
- if (!m_itemSize.isEmpty() || m_useHeaderWidths) {
+ if (!m_itemSize.isEmpty() || m_useHeaderWidths || m_visibleRoles.isEmpty()) {
return;
}
// size does not use the available view-size it the size of the
// first role will get stretched.
m_stretchedVisibleRolesSizes = m_visibleRolesSizes;
- const QByteArray role = visibleRoles().first();
+ const QByteArray role = m_visibleRoles.first();
QSizeF firstRoleSize = m_stretchedVisibleRolesSizes.value(role);
QSizeF dynamicItemSize = m_itemSize;
}
// Update the role sizes for all visible widgets
- foreach (KItemListWidget* widget, visibleItemListWidgets()) {
- widget->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
+ QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+ while (it.hasNext()) {
+ it.next();
+ it.value()->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
}
}
return m_header ? m_header->geometry() : QRectF();
}
+bool KItemListView::changesItemGridLayout(const QSizeF& newGridSize,
+ const QSizeF& newItemSize,
+ const QSizeF& newItemMargin) const
+{
+ if (newItemSize.isEmpty() || newGridSize.isEmpty()) {
+ return false;
+ }
+
+ if (m_layouter->scrollOrientation() == Qt::Vertical) {
+ const qreal itemWidth = m_layouter->itemSize().width();
+ if (itemWidth > 0) {
+ const int newColumnCount = itemsPerSize(newGridSize.width(),
+ newItemSize.width(),
+ newItemMargin.width());
+ if (m_model->count() > newColumnCount) {
+ const int oldColumnCount = itemsPerSize(m_layouter->size().width(),
+ itemWidth,
+ m_layouter->itemMargin().width());
+ return oldColumnCount != newColumnCount;
+ }
+ }
+ } else {
+ const qreal itemHeight = m_layouter->itemSize().height();
+ if (itemHeight > 0) {
+ const int newRowCount = itemsPerSize(newGridSize.height(),
+ newItemSize.height(),
+ newItemMargin.height());
+ if (m_model->count() > newRowCount) {
+ const int oldRowCount = itemsPerSize(m_layouter->size().height(),
+ itemHeight,
+ m_layouter->itemMargin().height());
+ return oldRowCount != newRowCount;
+ }
+ }
+ }
+
+ return false;
+}
+
+bool KItemListView::animateChangedItemCount(int changedItemCount) const
+{
+ if (m_layouter->size().isEmpty() || m_layouter->itemSize().isEmpty()) {
+ return false;
+ }
+
+ const int maximum = (scrollOrientation() == Qt::Vertical)
+ ? m_layouter->size().width() / m_layouter->itemSize().width()
+ : m_layouter->size().height() / m_layouter->itemSize().height();
+ // Only animate if up to 2/3 of a row or column are inserted or removed
+ return changedItemCount <= maximum * 2 / 3;
+}
+
+
+bool KItemListView::scrollBarRequired(const QSizeF& size) const
+{
+ const QSizeF oldSize = m_layouter->size();
+
+ m_layouter->setSize(size);
+ const qreal maxOffset = m_layouter->maximumScrollOffset();
+ m_layouter->setSize(oldSize);
+
+ return m_layouter->scrollOrientation() == Qt::Vertical ? maxOffset > size.height()
+ : maxOffset > size.width();
+}
+
+void KItemListView::updateGroupHeaderHeight()
+{
+ qreal groupHeaderHeight = m_styleOption.fontMetrics.height();
+ qreal groupHeaderMargin = 0;
+
+ if (scrollOrientation() == Qt::Horizontal) {
+ // The vertical margin above and below the header should be
+ // equal to the horizontal margin, not the vertical margin
+ // from m_styleOption.
+ groupHeaderHeight += 2 * m_styleOption.horizontalMargin;
+ groupHeaderMargin = m_styleOption.horizontalMargin;
+ } else if (m_itemSize.isEmpty()){
+ groupHeaderHeight += 4 * m_styleOption.padding;
+ groupHeaderMargin = m_styleOption.iconSize / 2;
+ } else {
+ groupHeaderHeight += 2 * m_styleOption.padding + m_styleOption.verticalMargin;
+ groupHeaderMargin = m_styleOption.iconSize / 4;
+ }
+ m_layouter->setGroupHeaderHeight(groupHeaderHeight);
+ m_layouter->setGroupHeaderMargin(groupHeaderMargin);
+
+ updateVisibleGroupHeaders();
+}
+
+void KItemListView::updateSiblingsInformation(int firstIndex, int lastIndex)
+{
+ if (!supportsItemExpanding() || !m_model) {
+ return;
+ }
+
+ if (firstIndex < 0 || lastIndex < 0) {
+ firstIndex = m_layouter->firstVisibleIndex();
+ lastIndex = m_layouter->lastVisibleIndex();
+ } else {
+ const bool isRangeVisible = (firstIndex <= m_layouter->lastVisibleIndex() &&
+ lastIndex >= m_layouter->firstVisibleIndex());
+ if (!isRangeVisible) {
+ return;
+ }
+ }
+
+ int previousParents = 0;
+ QBitArray previousSiblings;
+
+ // The rootIndex describes the first index where the siblings get
+ // calculated from. For the calculation the upper most parent item
+ // is required. For performance reasons it is checked first whether
+ // the visible items before or after the current range already
+ // contain a siblings information which can be used as base.
+ int rootIndex = firstIndex;
+
+ KItemListWidget* widget = m_visibleItems.value(firstIndex - 1);
+ if (!widget) {
+ // There is no visible widget before the range, check whether there
+ // is one after the range:
+ widget = m_visibleItems.value(lastIndex + 1);
+ if (widget) {
+ // The sibling information of the widget may only be used if
+ // all items of the range have the same number of parents.
+ const int parents = m_model->expandedParentsCount(lastIndex + 1);
+ for (int i = lastIndex; i >= firstIndex; --i) {
+ if (m_model->expandedParentsCount(i) != parents) {
+ widget = 0;
+ break;
+ }
+ }
+ }
+ }
+
+ if (widget) {
+ // Performance optimization: Use the sibling information of the visible
+ // widget beside the given range.
+ previousSiblings = widget->siblingsInformation();
+ if (previousSiblings.isEmpty()) {
+ return;
+ }
+ previousParents = previousSiblings.count() - 1;
+ previousSiblings.truncate(previousParents);
+ } else {
+ // Potentially slow path: Go back to the upper most parent of firstIndex
+ // to be able to calculate the initial value for the siblings.
+ while (rootIndex > 0 && m_model->expandedParentsCount(rootIndex) > 0) {
+ --rootIndex;
+ }
+ }
+
+ Q_ASSERT(previousParents >= 0);
+ for (int i = rootIndex; i <= lastIndex; ++i) {
+ // Update the parent-siblings in case if the current item represents
+ // a child or an upper parent.
+ const int currentParents = m_model->expandedParentsCount(i);
+ Q_ASSERT(currentParents >= 0);
+ if (previousParents < currentParents) {
+ previousParents = currentParents;
+ previousSiblings.resize(currentParents);
+ previousSiblings.setBit(currentParents - 1, hasSiblingSuccessor(i - 1));
+ } else if (previousParents > currentParents) {
+ previousParents = currentParents;
+ previousSiblings.truncate(currentParents);
+ }
+
+ if (i >= firstIndex) {
+ // The index represents a visible item. Apply the parent-siblings
+ // and update the sibling of the current item.
+ KItemListWidget* widget = m_visibleItems.value(i);
+ if (!widget) {
+ continue;
+ }
+
+ QBitArray siblings = previousSiblings;
+ siblings.resize(siblings.count() + 1);
+ siblings.setBit(siblings.count() - 1, hasSiblingSuccessor(i));
+
+ widget->setSiblingsInformation(siblings);
+ }
+ }
+}
+
+bool KItemListView::hasSiblingSuccessor(int index) const
+{
+ bool hasSuccessor = false;
+ const int parentsCount = m_model->expandedParentsCount(index);
+ int successorIndex = index + 1;
+
+ // Search the next sibling
+ const int itemCount = m_model->count();
+ while (successorIndex < itemCount) {
+ const int currentParentsCount = m_model->expandedParentsCount(successorIndex);
+ if (currentParentsCount == parentsCount) {
+ hasSuccessor = true;
+ break;
+ } else if (currentParentsCount < parentsCount) {
+ break;
+ }
+ ++successorIndex;
+ }
+
+ if (m_grouped && hasSuccessor) {
+ // If the sibling is part of another group, don't mark it as
+ // successor as the group header is between the sibling connections.
+ for (int i = index + 1; i <= successorIndex; ++i) {
+ if (m_layouter->isFirstGroupItem(i)) {
+ hasSuccessor = false;
+ break;
+ }
+ }
+ }
+
+ return hasSuccessor;
+}
+
int KItemListView::calculateAutoScrollingIncrement(int pos, int range, int oldInc)
{
int inc = 0;
return inc;
}
+int KItemListView::itemsPerSize(qreal size, qreal itemSize, qreal itemMargin)
+{
+ const qreal availableSize = size - itemMargin;
+ const int count = availableSize / (itemSize + itemMargin);
+ return count;
+}
+
KItemListCreatorBase::~KItemListCreatorBase()
projects / dolphin.git / blobdiff