explicit Viewport(View &parent);
private:
+ /**
+ * Indicates when a view item is being hovered over.
+ * @param item The item that is being hovered over, or @c nullptr
+ * if no view item is being hovered over.
+ */
+ void item_hover(const std::shared_ptr<pv::view::ViewItem> &item);
+
/**
* Gets the first view item which has a hit-box that contains @c pt .
* @param pt the point to search with.
std::shared_ptr<pv::view::ViewItem> get_mouse_over_item(
const QPoint &pt);
+ /**
+ * Sets this item into the dragged state.
+ */
+ void drag();
+
+ /**
+ * Drag the background by the delta offset.
+ * @param delta the drag offset in pixels.
+ */
+ void drag_by(const QPoint &delta);
+
+ /**
+ * Sets this item into the un-dragged state.
+ */
+ void drag_release();
+
/**
* Gets the items in the view widget.
*/
private:
void paintEvent(QPaintEvent *event);
- void mousePressEvent(QMouseEvent *event);
- void mouseReleaseEvent(QMouseEvent *event);
- void mouseMoveEvent(QMouseEvent *event);
void mouseDoubleClickEvent(QMouseEvent * event);
void wheelEvent(QWheelEvent *event);
+
private:
- QPoint mouse_down_point_;
- double mouse_down_offset_;
- bool mouse_down_valid_;
+ double drag_offset_;
double pinch_offset0_;
double pinch_offset1_;