void setAutoScroll(bool enabled);
bool autoScroll() const;
+ /**
+ * If set to true selection-toggles will be shown when hovering
+ * an item. Per default the selection-toggles are disabled.
+ */
+ void setEnabledSelectionToggles(bool enabled);
+ bool enabledSelectionToggles() const;
+
/**
* @return Controller of the item-list. The controller gets
* initialized by KItemListController::setView() and will
virtual QHash<QByteArray, QSizeF> visibleRolesSizes(const KItemRangeList& itemRanges) const;
/**
- * @return The bounding rectangle of the item relative to the top/left of
+ * @return True if the view supports the expanding of items. Per default false
+ * is returned. If expanding of items is supported, the methods
+ * KItemModelBase::setExpanded(), KItemModelBase::isExpanded() and
+ * KItemModelBase::isExpandable() must be reimplemented. The view-implementation
+ * has to take care itself how to visually represent the expanded items provided
+ * by the model.
+ */
+ bool supportsItemExpanding() const;
+
+ /**
+ * @return The rectangle of the item relative to the top/left of
* the currently visible area (see KItemListView::offset()).
*/
- QRectF itemBoundingRect(int index) const;
+ QRectF itemRect(int index) const;
/**
- * @return The number of items that can be shown in parallel for one offset.
- * Assuming the scrolldirection is vertical then a value of 4 means
- * that 4 columns for items are available. Assuming the scrolldirection
- * is horizontal then a value of 4 means that 4 lines for items are
- * available.
+ * @return The context rectangle of the item relative to the top/left of
+ * the currently visible area (see KItemListView::offset()). The
+ * context rectangle is defined by by the united rectangle of
+ * the icon rectangle and the text rectangle (see KItemListWidget::iconRect()
+ * and KItemListWidget::textRect()) and is useful as reference for e.g. aligning
+ * a tooltip or a context-menu for an item. Note that a context rectangle will
+ * only be returned for (at least partly) visible items. An empty rectangle will
+ * be returned for fully invisible items.
*/
- int itemsPerOffset() const;
+ QRectF itemContextRect(int index) const;
+ /**
+ * Scrolls to the item with the index \a index so that the item
+ * will be fully visible.
+ */
+ void scrollToItem(int index);
+
+ /**
+ * If several properties of KItemListView are changed synchronously, it is
+ * recommended to encapsulate the calls between beginTransaction() and endTransaction().
+ * This prevents unnecessary and expensive layout-calculations.
+ */
void beginTransaction();
+
+ /**
+ * Counterpart to beginTransaction(). The layout changes will only be animated if
+ * all property changes between beginTransaction() and endTransaction() support
+ * animations.
+ */
void endTransaction();
+
bool isTransactionActive() const;
/**
void maximumItemOffsetChanged(qreal current, qreal previous);
void scrollTo(qreal newOffset);
+ /**
+ * Is emitted if the user has changed the sort order by clicking on a
+ * header item (see KItemListView::setHeaderShown()). The sort order
+ * of the model has already been adjusted to
+ * the current sort order. Note that no signal will be emitted if the
+ * sort order of the model has been changed without user interaction.
+ */
+ void sortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous);
+
+ /**
+ * Is emitted if the user has changed the sort role by clicking on a
+ * header item (see KItemListView::setHeaderShown()). The sort role
+ * of the model has already been adjusted to
+ * the current sort role. Note that no signal will be emitted if the
+ * sort role of the model has been changed without user interaction.
+ */
+ void sortRoleChanged(const QByteArray& current, const QByteArray& previous);
+
protected:
virtual void initializeItemListWidget(KItemListWidget* item);
QList<KItemListWidget*> visibleItemListWidgets() const;
- /** @reimp */
- virtual void resizeEvent(QGraphicsSceneResizeEvent* event);
+ /**
+ * Must be called by the derived class if it supports the expanding
+ * of items.
+ * @see supportsItemExpanding()
+ */
+ void setSupportsItemExpanding(bool supportsExpanding);
protected slots:
virtual void slotItemsInserted(const KItemRangeList& itemRanges);
virtual void slotItemsChanged(const KItemRangeList& itemRanges,
const QSet<QByteArray>& roles);
+ virtual void slotGroupedSortingChanged(bool current);
+ virtual void slotSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous);
+ virtual void slotSortRoleChanged(const QByteArray& current, const QByteArray& previous);
+ virtual void slotCurrentChanged(int current, int previous);
+ virtual void slotSelectionChanged(const QSet<int>& current, const QSet<int>& previous);
+
private slots:
- void slotGroupedSortingChanged(bool current);
- void slotCurrentChanged(int current, int previous);
- void slotSelectionChanged(const QSet<int>& current, const QSet<int>& previous);
void slotAnimationFinished(QGraphicsWidget* widget,
KItemListViewAnimation::AnimationType type);
void slotLayoutTimerFinished();
*/
void triggerAutoScrolling();
+ /**
+ * Is invoked if the geometry of the parent-widget from a group-header has been
+ * changed. The x-position and width of the group-header gets adjusted to assure
+ * that it always spans the whole width even during temporary transitions of the
+ * parent widget.
+ */
+ void slotGeometryOfGroupHeaderParentChanged();
+
private:
enum LayoutAnimationHint
{
KItemListRubberBand* rubberBand() const;
- void updateLayout();
- void doLayout(LayoutAnimationHint hint, int changedIndex, int changedCount);
- void doGroupHeadersLayout(LayoutAnimationHint hint, int changedIndex, int changedCount);
+ void doLayout(LayoutAnimationHint hint, int changedIndex = 0, int changedCount = 0);
+
+ /**
+ * Helper method for doLayout: Returns a list of items that can be reused for the visible
+ * area. Invisible group headers get recycled. The reusable items are items that are
+ * invisible. If the animation hint is 'Animation' then items that are currently animated
+ * won't be reused. Reusing items is faster in comparison to deleting invisible
+ * items and creating a new instance for visible items.
+ */
+ QList<int> recycleInvisibleItems(int firstVisibleIndex,
+ int lastVisibleIndex,
+ LayoutAnimationHint hint);
+
+ /**
+ * Helper method for doLayout: Starts a moving-animation for the widget to the given
+ * new position. The moving-animation is only started if the new position is within
+ * the same row or column, otherwise the create-animation is used instead.
+ * @return True if the moving-animation has been applied.
+ */
+ bool moveWidget(KItemListWidget* widget, const QPointF& newPos);
+
void emitOffsetChanges();
KItemListWidget* createWidget(int index);
void recycleWidget(KItemListWidget* widget);
+
+ /**
+ * Changes the index of the widget to \a index and assures a consistent
+ * update for m_visibleItems and m_visibleCells. The cell-information
+ * for the new index will not be updated and be initialized as empty cell.
+ */
void setWidgetIndex(KItemListWidget* widget, int index);
/**
- * Helper method for setGeometry() and setItemSize(): Calling both methods might result
- * in a changed number of visible items. To assure that currently invisible items can
- * get animated from the old position to the new position prepareLayoutForIncreasedItemCount()
- * takes care to create all item widgets that are visible with the old or the new size.
- * @param size Size of the layouter or the item dependent on \p sizeType.
- * @param sizeType LayouterSize: KItemListLayouter::setSize() is used.
- * ItemSize: KItemListLayouter::setItemSize() is used.
+ * Changes the index of the widget to \a index. In opposite to
+ * setWidgetIndex() the cell-information for the widget gets updated.
+ * This update gives doLayout() the chance to animate the moving
+ * of the item visually (see moveWidget()).
*/
- void prepareLayoutForIncreasedItemCount(const QSizeF& size, SizeType sizeType);
+ void moveWidgetToIndex(KItemListWidget* widget, int index);
/**
* Helper method for prepareLayoutForIncreasedItemCount().
*/
void updateWidgetProperties(KItemListWidget* widget, int index);
+ /**
+ * Helper method for updateWidgetPropertes() to create or update
+ * the itemlist group-header.
+ */
+ void updateGroupHeaderForWidget(KItemListWidget* widget);
+
+ /**
+ * Updates the position and size of the group-header that belongs
+ * to the itemlist widget \a widget. The given widget must represent
+ * the first item of a group.
+ */
+ void updateGroupHeaderLayout(KItemListWidget* widget);
+
+ /**
+ * Recycles the group-header from the widget.
+ */
+ void recycleGroupHeaderForWidget(KItemListWidget* widget);
+
+ /**
+ * Helper method for slotGroupedSortingChanged(), slotSortOrderChanged()
+ * and slotSortRoleChanged(): Iterates through all visible items and updates
+ * the group-header widgets.
+ */
+ void updateVisibleGroupHeaders();
+
+ /**
+ * @return Index for the item in the list returned by KItemModelBase::groups()
+ * that represents the group where the item with the index \a index
+ * belongs to. -1 is returned if no groups are available.
+ */
+ int groupIndexForItem(int index) const;
+
+ /**
+ * Updates the alternateBackground-property of the widget dependent
+ * on the state of useAlternateBackgrounds() and the grouping state.
+ */
+ void updateAlternateBackgroundForWidget(KItemListWidget* widget);
+
+ /**
+ * @return True if alternate backgrounds should be used for the items.
+ * This is the case if an empty item-size is given and if there
+ * is more than one visible role.
+ */
+ bool useAlternateBackgrounds() const;
+
/**
* @return The widths of each visible role that is shown in the KItemListHeader.
*/
* if no header is shown.
*/
QRectF headerBoundaries() const;
+
+ /**
+ * @return True if the number of columns or rows will be changed when applying
+ * the new grid- and item-size. Used to determine whether an animation
+ * should be done when applying the new layout.
+ */
+ bool changesItemGridLayout(const QSizeF& newGridSize,
+ const QSizeF& newItemSize,
+ const QSizeF& newItemMargin) const;
+
+ /**
+ * @param changedItemCount Number of inserted or removed items.
+ * @return True if the inserting or removing of items should be animated.
+ * No animation should be done if the number of items is too large
+ * to provide a pleasant animation.
+ */
+ bool animateChangedItemCount(int changedItemCount) const;
+
+ /**
+ * @return True if a scrollbar for the given scroll-orientation is required
+ * when using a size of \p size for the view. Calling the method is rather
+ * expansive as a temporary relayout needs to be done.
+ */
+ bool scrollBarRequired(const QSizeF& size) const;
+
+ /**
+ * Applies the height of the group header to the layouter. The height
+ * depends on the used scroll orientation.
+ */
+ void updateGroupHeaderHeight();
+
+ /**
+ * Updates the siblings-information for all visible items that are inside
+ * the range of \p firstIndex and \p lastIndex. If firstIndex or lastIndex
+ * is smaller than 0, the siblings-information for all visible items gets
+ * updated.
+ * @see KItemListWidget::setSiblingsInformation()
+ */
+ void updateSiblingsInformation(int firstIndex = -1, int lastIndex = -1);
+
+ /**
+ * Helper method for updateExpansionIndicators().
+ * @return True if the item with the index \a index has a sibling successor
+ * (= the item is not the last item of the current hierarchy).
+ */
+ bool hasSiblingSuccessor(int index) const;
/**
* Helper function for triggerAutoScrolling().
* value != 0 will be returned.
*/
static int calculateAutoScrollingIncrement(int pos, int range, int oldInc);
+
+ /**
+ * Helper functions for changesItemCount().
+ * @return The number of items that fit into the available size by
+ * respecting the size of the item and the margin between the items.
+ */
+ static int itemsPerSize(qreal size, qreal itemSize, qreal itemMargin);
private:
+ bool m_enabledSelectionToggles;
bool m_grouped;
+ bool m_supportsItemExpanding;
int m_activeTransactions; // Counter for beginTransaction()/endTransaction()
+ LayoutAnimationHint m_endTransactionAnimationHint;
QSizeF m_itemSize;
KItemListController* m_controller;
QHash<int, KItemListWidget*> m_visibleItems;
QHash<KItemListWidget*, KItemListGroupHeader*> m_visibleGroups;
+ struct Cell
+ {
+ Cell() : column(-1), row(-1) {}
+ Cell(int c, int r) : column(c), row(r) {}
+ int column;
+ int row;
+ };
+ QHash<int, Cell> m_visibleCells;
+
int m_scrollBarExtent;
KItemListSizeHintResolver* m_sizeHintResolver;
KItemListViewLayouter* m_layouter;
KItemListHeader* m_header;
bool m_useHeaderWidths;
+ friend class KItemListContainer; // Accesses scrollBarRequired()
friend class KItemListController;
+ friend class KItemListControllerTest;
};
/**
};
template <class T>
-class LIBDOLPHINPRIVATE_EXPORT KItemListWidgetCreator : public KItemListWidgetCreatorBase
+class KItemListWidgetCreator : public KItemListWidgetCreatorBase
{
public:
virtual ~KItemListWidgetCreator();
KItemListWidget* KItemListWidgetCreator<T>::create(KItemListView* view)
{
KItemListWidget* widget = static_cast<KItemListWidget*>(popRecycleableWidget());
- if (widget) {
- widget->setParentItem(view);
- } else {
+ if (!widget) {
widget = new T(view);
addCreatedWidget(widget);
}
{
public:
virtual ~KItemListGroupHeaderCreatorBase();
- virtual KItemListGroupHeader* create(QGraphicsWidget* parent) = 0;
+ virtual KItemListGroupHeader* create(KItemListView* view) = 0;
virtual void recycle(KItemListGroupHeader* header);
};
template <class T>
-class LIBDOLPHINPRIVATE_EXPORT KItemListGroupHeaderCreator : public KItemListGroupHeaderCreatorBase
+class KItemListGroupHeaderCreator : public KItemListGroupHeaderCreatorBase
{
public:
virtual ~KItemListGroupHeaderCreator();
- virtual KItemListGroupHeader* create(QGraphicsWidget* parent);
+ virtual KItemListGroupHeader* create(KItemListView* view);
};
template <class T>
}
template <class T>
-KItemListGroupHeader* KItemListGroupHeaderCreator<T>::create(QGraphicsWidget* parent)
+KItemListGroupHeader* KItemListGroupHeaderCreator<T>::create(KItemListView* view)
{
KItemListGroupHeader* widget = static_cast<KItemListGroupHeader*>(popRecycleableWidget());
- if (widget) {
- widget->setParentItem(parent);
- } else {
- widget = new T(parent);
+ if (!widget) {
+ widget = new T(view);
addCreatedWidget(widget);
}
return widget;
projects / dolphin.git / blobdiff