#ifndef KITEMLISTVIEW_H
#define KITEMLISTVIEW_H
-#include <libdolphin_export.h>
+#include "libdolphin_export.h"
-#include <kitemviews/kitemlistgroupheader.h>
+#include <kitemviews/kstandarditemlistgroupheader.h>
#include <kitemviews/kitemliststyleoption.h>
-#include <kitemviews/kitemlistviewanimation_p.h>
#include <kitemviews/kitemlistwidget.h>
#include <kitemviews/kitemmodelbase.h>
+#include <kitemviews/private/kitemlistviewanimation.h>
#include <QGraphicsWidget>
#include <QSet>
class KItemListController;
class KItemListGroupHeaderCreatorBase;
class KItemListHeader;
+class KItemListHeaderWidget;
class KItemListSizeHintResolver;
class KItemListRubberBand;
class KItemListViewAnimation;
class KItemListViewLayouter;
class KItemListWidget;
+class KItemListWidgetInformant;
class KItemListWidgetCreatorBase;
-class KItemListViewCreatorBase;
class QTimer;
/**
* a GraphicsItem. Each visible item is represented by a KItemListWidget.
*
* The created view must be applied to the KItemListController with
- * KItemListController::setView(). For showing a custom model it is not
- * mandatory to derive from KItemListView, all that is necessary is
- * to set a widget-creator that is capable to create KItemListWidgets
- * showing the model items. A widget-creator can be set with
- * KItemListView::setWidgetCreator().
+ * KItemListController::setView() or with the constructor of
+ * KItemListController.
*
* @see KItemListWidget
* @see KItemModelBase
KItemListView(QGraphicsWidget* parent = 0);
virtual ~KItemListView();
- void setScrollOrientation(Qt::Orientation orientation);
- Qt::Orientation scrollOrientation() const;
-
- void setItemSize(const QSizeF& size);
- QSizeF itemSize() const;
-
- // TODO: add note that offset is not checked against maximumOffset, only against 0.
+ /**
+ * Offset of the scrollbar that represents the scroll-orientation
+ * (see setScrollOrientation()).
+ */
void setScrollOffset(qreal offset);
qreal scrollOffset() const;
qreal maximumScrollOffset() const;
+ /**
+ * Offset related to an item, that does not fit into the available
+ * size of the listview. If the scroll-orientation is vertical
+ * the item-offset describes the offset of the horizontal axe, if
+ * the scroll-orientation is horizontal the item-offset describes
+ * the offset of the vertical axe.
+ */
void setItemOffset(qreal scrollOffset);
qreal itemOffset() const;
qreal maximumItemOffset() const;
+ int maximumVisibleItems() const;
+
void setVisibleRoles(const QList<QByteArray>& roles);
QList<QByteArray> visibleRoles() const;
/**
* @return Model of the item-list. The model gets
- * initialized by KItemListController::setView() and will
+ * initialized by KItemListController::setModel() and will
* result in calling KItemListController::onModelChanged().
*/
KItemModelBase* model() const;
* <code>
* itemListView->setWidgetCreator(new KItemListWidgetCreator<X>());
* </code>
- * Note that the ownership of the widget creator is not transferred to
- * the item-list view: One instance of a widget creator might get shared
- * by several item-list view instances.
+ * The ownership of the widget creator is transferred to
+ * the item-list view.
**/
void setWidgetCreator(KItemListWidgetCreatorBase* widgetCreator);
KItemListWidgetCreatorBase* widgetCreator() const;
+ /**
+ * Sets the creator that creates a group header. Usually it is sufficient
+ * to implement a custom header widget X derived from KItemListGroupHeader and
+ * set the creator by:
+ * <code>
+ * itemListView->setGroupHeaderCreator(new KItemListGroupHeaderCreator<X>());
+ * </code>
+ * The ownership of the gropup header creator is transferred to
+ * the item-list view.
+ **/
void setGroupHeaderCreator(KItemListGroupHeaderCreatorBase* groupHeaderCreator);
KItemListGroupHeaderCreatorBase* groupHeaderCreator() const;
- void setStyleOption(const KItemListStyleOption& option);
+ /**
+ * @return The basic size of all items. The size of an item may be larger than
+ * the basic size (see KItemListView::itemSizeHint() and KItemListView::itemRect()).
+ */
+ QSizeF itemSize() const;
+
const KItemListStyleOption& styleOption() const;
- /** @reimp */
- virtual void setGeometry(const QRectF& rect);
+ virtual void setGeometry(const QRectF& rect) Q_DECL_OVERRIDE;
+ /**
+ * @return The page step which should be used by the vertical scroll bar.
+ * This is the height of the view except for the header widget.
+ */
+ qreal verticalPageStep() const;
+
+ /**
+ * @return Index of the item that is below the point \a pos.
+ * The position is relative to the upper right of
+ * the visible area. Only (at least partly) visible
+ * items are considered. -1 is returned if no item is
+ * below the position.
+ */
int itemAt(const QPointF& pos) const;
bool isAboveSelectionToggle(int index, const QPointF& pos) const;
bool isAboveExpansionToggle(int index, const QPointF& pos) const;
+ /**
+ * @return Index of the first item that is at least partly visible.
+ * -1 is returned if the model contains no items.
+ */
int firstVisibleIndex() const;
- int lastVisibleIndex() const;
/**
- * @return Required size for the item with the index \p index.
- * Per default KItemListView::itemSize() is returned.
- * When reimplementing this method it is recommended to
- * also reimplement KItemListView::itemSizeHintUpdateRequired().
+ * @return Index of the last item that is at least partly visible.
+ * -1 is returned if the model contains no items.
*/
- virtual QSizeF itemSizeHint(int index) const;
+ int lastVisibleIndex() const;
/**
- * @param itemRanges Items that must be checked for getting the visible roles sizes.
- * @return The size of each visible role in case if KItemListView::itemSize()
- * is empty. This allows to have dynamic but equal role sizes between
- * all items. Per default an empty hash is returned.
+ * @return Calculates the required size for all items in the model.
+ * It might be larger than KItemListView::itemSize().
+ * In this case the layout grid will be stretched to assure an
+ * unclipped item.
+ * NOTE: the logical height (width) is actually the
+ * width (height) if the scroll orientation is Qt::Vertical!
*/
- virtual QHash<QByteArray, QSizeF> visibleRolesSizes(const KItemRangeList& itemRanges) const;
+ void calculateItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint) const;
/**
- * @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.
+ * If set to true, items having child-items can be expanded to show the child-items as
+ * part of the view. Per default the expanding of items is is disabled. If expanding of
+ * items is enabled, the methods KItemModelBase::setExpanded(), KItemModelBase::isExpanded(),
+ * KItemModelBase::isExpandable() and KItemModelBase::expandedParentsCount()
+ * must be reimplemented. The view-implementation
+ * has to take care itself how to visually represent the expanded items provided
+ * by the model.
*/
- virtual bool supportsItemExpanding() const;
+ void setSupportsItemExpanding(bool supportsExpanding);
+ bool supportsItemExpanding() const;
/**
* @return The rectangle of the item relative to the top/left of
*/
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;
/**
- * Turns on the header if \p show is true. Per default the
- * header is not shown.
+ * Turns on the header if \p visible is true. Per default the
+ * header is not visible. Usually the header is turned on when
+ * showing a classic "table-view" to describe the shown columns.
+ */
+ void setHeaderVisible(bool visible);
+ bool isHeaderVisible() const;
+
+ /**
+ * @return Header of the list. The header is also available if it is not shown
+ * (see KItemListView::setHeaderShown()).
*/
- void setHeaderShown(bool show);
- bool isHeaderShown() const;
+ KItemListHeader* header() const;
/**
* @return Pixmap that is used for a drag operation based on the
- * items given by \a indexes. The default implementation returns
- * a null-pixmap.
+ * items given by \a indexes.
*/
- virtual QPixmap createDragPixmap(const QSet<int>& indexes) const;
+ virtual QPixmap createDragPixmap(const KItemSet& indexes) const;
/**
- * @reimp
+ * Lets the user edit the role \a role for item with the index \a index.
*/
- virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0);
+ void editRole(int index, const QByteArray& role);
+
+ virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) Q_DECL_OVERRIDE;
signals:
void scrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous);
*/
void sortRoleChanged(const QByteArray& current, const QByteArray& previous);
+ /**
+ * Is emitted if the user has changed the visible roles by moving a header
+ * item (see KItemListView::setHeaderShown()). Note that no signal will be
+ * emitted if the roles have been changed without user interaction by
+ * KItemListView::setVisibleRoles().
+ */
+ void visibleRolesChanged(const QList<QByteArray>& current, const QList<QByteArray>& previous);
+
+ void roleEditingCanceled(int index, const QByteArray& role, const QVariant& value);
+ void roleEditingFinished(int index, const QByteArray& role, const QVariant& value);
+
protected:
+ virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value) Q_DECL_OVERRIDE;
+ void setItemSize(const QSizeF& size);
+ void setStyleOption(const KItemListStyleOption& option);
+
+ /**
+ * If the scroll-orientation is vertical, the items are ordered
+ * from top to bottom (= default setting). If the scroll-orientation
+ * is horizontal, the items are ordered from left to right.
+ */
+ void setScrollOrientation(Qt::Orientation orientation);
+ Qt::Orientation scrollOrientation() const;
+
+ /**
+ * Factory method for creating a default widget-creator. The method will be used
+ * in case if setWidgetCreator() has not been set by the application.
+ * @return New instance of the widget-creator that should be used per
+ * default.
+ */
+ virtual KItemListWidgetCreatorBase* defaultWidgetCreator() const;
+
+ /**
+ * Factory method for creating a default group-header-creator. The method will be used
+ * in case if setGroupHeaderCreator() has not been set by the application.
+ * @return New instance of the group-header-creator that should be used per
+ * default.
+ */
+ virtual KItemListGroupHeaderCreatorBase* defaultGroupHeaderCreator() const;
+
+ /**
+ * Is called when creating a new KItemListWidget instance and allows derived
+ * classes to do a custom initialization.
+ */
virtual void initializeItemListWidget(KItemListWidget* item);
/**
virtual void onScrollOffsetChanged(qreal current, qreal previous);
virtual void onVisibleRolesChanged(const QList<QByteArray>& current, const QList<QByteArray>& previous);
virtual void onStyleOptionChanged(const KItemListStyleOption& current, const KItemListStyleOption& previous);
+ virtual void onSupportsItemExpandingChanged(bool supportsExpanding);
virtual void onTransactionBegin();
virtual void onTransactionEnd();
- virtual bool event(QEvent* event);
- virtual void mousePressEvent(QGraphicsSceneMouseEvent* event);
- virtual void mouseMoveEvent(QGraphicsSceneMouseEvent* event);
- virtual void dragEnterEvent(QGraphicsSceneDragDropEvent* event);
- virtual void dragMoveEvent(QGraphicsSceneDragDropEvent* event);
- virtual void dragLeaveEvent(QGraphicsSceneDragDropEvent* event);
- virtual void dropEvent(QGraphicsSceneDragDropEvent* event);
+ virtual bool event(QEvent* event) Q_DECL_OVERRIDE;
+ virtual void mousePressEvent(QGraphicsSceneMouseEvent* event) Q_DECL_OVERRIDE;
+ virtual void mouseMoveEvent(QGraphicsSceneMouseEvent* event) Q_DECL_OVERRIDE;
+ virtual void dragEnterEvent(QGraphicsSceneDragDropEvent* event) Q_DECL_OVERRIDE;
+ virtual void dragMoveEvent(QGraphicsSceneDragDropEvent* event) Q_DECL_OVERRIDE;
+ virtual void dragLeaveEvent(QGraphicsSceneDragDropEvent* event) Q_DECL_OVERRIDE;
+ virtual void dropEvent(QGraphicsSceneDragDropEvent* event) Q_DECL_OVERRIDE;
QList<KItemListWidget*> visibleItemListWidgets() const;
+ virtual void updateFont();
+ virtual void updatePalette();
+
protected slots:
virtual void slotItemsInserted(const KItemRangeList& itemRanges);
virtual void slotItemsRemoved(const KItemRangeList& itemRanges);
virtual void slotItemsMoved(const KItemRange& itemRange, const QList<int>& movedToIndexes);
virtual void slotItemsChanged(const KItemRangeList& itemRanges,
const QSet<QByteArray>& roles);
+ virtual void slotGroupsChanged();
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);
+ virtual void slotSelectionChanged(const KItemSet& current, const KItemSet& previous);
private slots:
void slotAnimationFinished(QGraphicsWidget* widget,
void slotRubberBandActivationChanged(bool active);
/**
- * Is invoked if the visible role-width of one role in the header has
- * been changed by the user. It is remembered that the user has modified
- * the role-width, so that it won't be changed anymore automatically to
- * calculate an optimized width.
+ * Is invoked if the column-width of one role in the header has
+ * been changed by the user. The automatic resizing of columns
+ * will be turned off as soon as this method has been called at
+ * least once.
*/
- void slotVisibleRoleWidthChanged(const QByteArray& role,
- qreal currentWidth,
- qreal previousWidth);
+ void slotHeaderColumnWidthChanged(const QByteArray& role,
+ qreal currentWidth,
+ qreal previousWidth);
+
+ /**
+ * Is invoked if a column has been moved by the user. Applies
+ * the moved role to the view.
+ */
+ void slotHeaderColumnMoved(const QByteArray& role,
+ int currentIndex,
+ int previousIndex);
/**
* Triggers the autoscrolling if autoScroll() is enabled by checking the
*/
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();
+
+ void slotRoleEditingCanceled(int index, const QByteArray& role, const QVariant& value);
+ void slotRoleEditingFinished(int index, const QByteArray& role, const QVariant& value);
+
private:
enum LayoutAnimationHint
{
* 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 QRectF& itemBounds);
+ 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);
+ /**
+ * 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 moveWidgetToIndex(KItemListWidget* widget, int index);
+
/**
* Helper method for prepareLayoutForIncreasedItemCount().
*/
void updateWidgetProperties(KItemListWidget* widget, int index);
/**
- * Helper method for createWidget() and setWidgetIndex() to create or update
+ * Helper method for updateWidgetPropertes() to create or update
* the itemlist group-header.
*/
void updateGroupHeaderForWidget(KItemListWidget* widget);
void updateGroupHeaderLayout(KItemListWidget* widget);
/**
- * Recycles the group-header from the widget.
+ * Recycles the group-header for the widget.
*/
void recycleGroupHeaderForWidget(KItemListWidget* widget);
void updateVisibleGroupHeaders();
/**
- * @return The widths of each visible role that is shown in the KItemListHeader.
+ * @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 alternate background for all visible items.
+ * @see updateAlternateBackgroundForWidget()
+ */
+ void updateAlternateBackgrounds();
+
+ /**
+ * 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.
*/
- QHash<QByteArray, qreal> headerRolesWidths() const;
+ bool useAlternateBackgrounds() const;
/**
- * Updates m_visibleRolesSizes by calling KItemListView::visibleRolesSizes().
- * Nothing will be done if m_itemRect is not empty or custom header-widths
- * are used (see m_useHeaderWidths). Also m_strechedVisibleRolesSizes will be adjusted
- * to respect the available view-size.
+ * @param itemRanges Items that must be checked for getting the widths of columns.
+ * @return The preferred width of the column of each visible role. The width will
+ * be respected if the width of the item size is <= 0 (see
+ * KItemListView::setItemSize()). Per default an empty hash
+ * is returned.
*/
- void updateVisibleRolesSizes(const KItemRangeList& itemRanges);
+ QHash<QByteArray, qreal> preferredColumnWidths(const KItemRangeList& itemRanges) const;
/**
- * Convenience method for updateVisibleRoleSizes(KItemRangeList() << KItemRange(0, m_model->count()).
+ * Applies the column-widths from m_headerWidget to the layout
+ * of the view.
*/
- void updateVisibleRolesSizes();
+ void applyColumnWidthsFromHeader();
/**
- * Updates m_stretchedVisibleRolesSizes based on m_visibleRolesSizes and the available
- * view-size. Nothing will be done if m_itemRect is not empty or custom header-widths
- * are used (see m_useHeaderWidths).
+ * Applies the column-widths from m_headerWidget to \a widget.
*/
- void updateStretchedVisibleRolesSizes();
+ void updateWidgetColumnWidths(KItemListWidget* widget);
/**
- * @return Sum of the widths of all visible roles.
+ * Updates the preferred column-widths of m_groupHeaderWidget by
+ * invoking KItemListView::columnWidths().
*/
- qreal visibleRolesSizesWidthSum() const;
+ void updatePreferredColumnWidths(const KItemRangeList& itemRanges);
/**
- * @return Sum of the heights of all visible roles.
+ * Convenience method for
+ * updatePreferredColumnWidths(KItemRangeList() << KItemRange(0, m_model->count()).
*/
- qreal visibleRolesSizesHeightSum() const;
+ void updatePreferredColumnWidths();
+
+ /**
+ * Resizes the column-widths of m_headerWidget based on the preferred widths
+ * and the vailable view-size.
+ */
+ void applyAutomaticColumnWidths();
+
+ /**
+ * @return Sum of the widths of all columns.
+ */
+ qreal columnWidthsSum() const;
/**
* @return Boundaries of the header. An empty rectangle is returned
* 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;
-
+ 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.
*/
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;
+
+ /**
+ * Shows a drop-indicator between items dependent on the given
+ * cursor position. The cursor position is relative the the upper left
+ * edge of the view.
+ * @return Index of the item where the dropping is done. An index of -1
+ * indicates that the item has been dropped after the last item.
+ */
+ int showDropIndicator(const QPointF& pos);
+ void hideDropIndicator();
+
+ /**
+ * 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 method for slotRoleEditingCanceled() and slotRoleEditingFinished().
+ * Disconnects the two Signals "roleEditingCanceled" and
+ * "roleEditingFinished"
+ */
+ void disconnectRoleEditingSignals(int index);
+
/**
* Helper function for triggerAutoScrolling().
* @param pos Logical position of the mouse relative to the range.
*/
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;
+ bool m_editingRole;
int m_activeTransactions; // Counter for beginTransaction()/endTransaction()
+ LayoutAnimationHint m_endTransactionAnimationHint;
QSizeF m_itemSize;
KItemListController* m_controller;
KItemModelBase* m_model;
QList<QByteArray> m_visibleRoles;
- QHash<QByteArray, QSizeF> m_visibleRolesSizes;
- QHash<QByteArray, QSizeF> m_stretchedVisibleRolesSizes;
- KItemListWidgetCreatorBase* m_widgetCreator;
- KItemListGroupHeaderCreatorBase* m_groupHeaderCreator;
+ mutable KItemListWidgetCreatorBase* m_widgetCreator;
+ mutable KItemListGroupHeaderCreatorBase* m_groupHeaderCreator;
KItemListStyleOption m_styleOption;
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;
QTimer* m_autoScrollTimer;
KItemListHeader* m_header;
- bool m_useHeaderWidths;
-
+ KItemListHeaderWidget* m_headerWidget;
+
+ // When dragging items into the view where the sort-role of the model
+ // is empty, a visual indicator should be shown during dragging where
+ // the dropping will happen. This indicator is specified by an index
+ // of the item. -1 means that no indicator will be shown at all.
+ // The m_dropIndicator is set by the KItemListController
+ // by KItemListView::showDropIndicator() and KItemListView::hideDropIndicator().
+ QRectF m_dropIndicator;
+
+ friend class KItemListContainer; // Accesses scrollBarRequired()
+ friend class KItemListHeader; // Accesses m_headerWidget
friend class KItemListController;
+ friend class KItemListControllerTest;
+ friend class KItemListViewAccessible;
+ friend class KItemListAccessibleCell;
};
/**
* @brief Base class for creating KItemListWidgets.
*
* It is recommended that applications simply use the KItemListWidgetCreator-template class.
- * For a custom implementation the methods create() and recyle() must be reimplemented.
- * The intention of the widget creator is to prevent repetitive and expensive instantiations and
- * deletions of KItemListWidgets by recycling existing widget instances.
+ * For a custom implementation the methods create(), itemSizeHint() and preferredColumnWith()
+ * must be reimplemented. The intention of the widget creator is to prevent repetitive and
+ * expensive instantiations and deletions of KItemListWidgets by recycling existing widget
+ * instances.
*/
class LIBDOLPHINPRIVATE_EXPORT KItemListWidgetCreatorBase : public KItemListCreatorBase
{
public:
virtual ~KItemListWidgetCreatorBase();
+
virtual KItemListWidget* create(KItemListView* view) = 0;
+
virtual void recycle(KItemListWidget* widget);
+
+ virtual void calculateItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const = 0;
+
+ virtual qreal preferredRoleColumnWidth(const QByteArray& role,
+ int index,
+ const KItemListView* view) const = 0;
};
+/**
+ * @brief Template class for creating KItemListWidgets.
+ */
template <class T>
class KItemListWidgetCreator : public KItemListWidgetCreatorBase
{
public:
+ KItemListWidgetCreator();
virtual ~KItemListWidgetCreator();
+
virtual KItemListWidget* create(KItemListView* view);
+
+ virtual void calculateItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const;
+
+ virtual qreal preferredRoleColumnWidth(const QByteArray& role,
+ int index,
+ const KItemListView* view) const;
+private:
+ KItemListWidgetInformant* m_informant;
};
+template <class T>
+KItemListWidgetCreator<T>::KItemListWidgetCreator() :
+ m_informant(T::createInformant())
+{
+}
+
template <class T>
KItemListWidgetCreator<T>::~KItemListWidgetCreator()
{
+ delete m_informant;
}
template <class T>
{
KItemListWidget* widget = static_cast<KItemListWidget*>(popRecycleableWidget());
if (!widget) {
- widget = new T(view);
+ widget = new T(m_informant, view);
addCreatedWidget(widget);
}
return widget;
}
+template<class T>
+void KItemListWidgetCreator<T>::calculateItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
+{
+ return m_informant->calculateItemSizeHints(logicalHeightHints, logicalWidthHint, view);
+}
+
+template<class T>
+qreal KItemListWidgetCreator<T>::preferredRoleColumnWidth(const QByteArray& role,
+ int index,
+ const KItemListView* view) const
+{
+ return m_informant->preferredRoleColumnWidth(role, index, view);
+}
+
/**
* @brief Base class for creating KItemListGroupHeaders.
*
projects / dolphin.git / blobdiff