Allow custom sorting of details-view columns

[dolphin.git] / src / kitemviews / kitemlistheader_p.h

diff --git a/src/kitemviews/kitemlistheader_p.h b/src/kitemviews/kitemlistheader_p.h
index e75bd7b148f067792a81b2d133924d3d070e3777..56f80c9dd698ded14d262c3772dc76756d0bacef 100644 (file)
--- a/src/kitemviews/kitemlistheader_p.h
+++ b/src/kitemviews/kitemlistheader_p.h
@@ -47,16 +47,101 @@ public:
     void setVisibleRolesWidths(const QHash<QByteArray, qreal> rolesWidths);
     QHash<QByteArray, qreal> visibleRolesWidths() const;
 
+    qreal minimumRoleWidth() const;
+
     virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0);
 
+signals:
+    /**
+     * Is emitted if the width of a visible role has been adjusted by the user with the mouse
+     * (no signal is emitted if KItemListHeader::setVisibleRoles() is invoked).
+     */
+    void visibleRoleWidthChanged(const QByteArray& role,
+                                 qreal currentWidth,
+                                 qreal previousWidth);
+
+    /**
+     * Is emitted if the position of the visible role has been changed.
+     */
+    void visibleRoleMoved(const QByteArray& role, int currentIndex, int previousIndex);
+
+    /**
+     * Is emitted if the user has changed the sort order by clicking on a
+     * header item. 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. 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 mousePressEvent(QGraphicsSceneMouseEvent* event);
+    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent* event);
+    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent* event);
+    virtual void hoverEnterEvent(QGraphicsSceneHoverEvent* event);
+    virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent* event);
+    virtual void hoverMoveEvent(QGraphicsSceneHoverEvent* event);
+
 private slots:
     void slotSortRoleChanged(const QByteArray& current, const QByteArray& previous);
     void slotSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous);
 
 private:
+    void paintRole(QPainter* painter, const QByteArray& role, const QRectF& rect, int orderIndex) const;
+
+    void updatePressedRoleIndex(const QPointF& pos);
+    void updateHoveredRoleIndex(const QPointF& pos);
+    int roleIndexAt(const QPointF& pos) const;
+    bool isAboveRoleGrip(const QPointF& pos, int roleIndex) const;
+
+    /**
+     * Creates a pixmap of the role with the index \a roleIndex that is shown
+     * during moving a role.
+     */
+    QPixmap createRolePixmap(int roleIndex) const;
+
+    /**
+     * @return Target index of the currently moving visible role based on the current
+     *         state of m_movingRole.
+     */
+    int targetOfMovingRole() const;
+
+    /**
+     * @return x-position of the left border of the role \a role.
+     */
+    qreal roleXPosition(const QByteArray& role) const;
+
+private:
+    enum RoleOperation
+    {
+        NoRoleOperation,
+        ResizeRoleOperation,
+        MoveRoleOperation
+    };
+
     KItemModelBase* m_model;
     QList<QByteArray> m_visibleRoles;
     QHash<QByteArray, qreal> m_visibleRolesWidths;
+
+    int m_hoveredRoleIndex;
+    int m_pressedRoleIndex;
+    RoleOperation m_roleOperation;
+    QPointF m_pressedMousePos;
+
+    struct MovingRole
+    {
+        QPixmap pixmap;
+        int x;
+        int xDec;
+        int index;
+    } m_movingRole;
 };
 
 #endif