Standardize on 'event' as name for all Qt events.

[pulseview.git] / pv / view / viewwidget.hpp

diff --git a/pv/view/viewwidget.hpp b/pv/view/viewwidget.hpp
index fc7247627a8783f1a55bf81dc31526da151c8032..fade3d289ab1e687ce511afd9c960337b9e75ef3 100644 (file)
--- a/pv/view/viewwidget.hpp
+++ b/pv/view/viewwidget.hpp
@@ -18,13 +18,15 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
-#ifndef PULSEVIEW_PV_VIEWWIDGET_H
-#define PULSEVIEW_PV_VIEWWIDGET_H
+#ifndef PULSEVIEW_PV_VIEWWIDGET_HPP
+#define PULSEVIEW_PV_VIEWWIDGET_HPP
 
 #include <memory>
 
 #include <QWidget>
 
+class QTouchEvent;
+
 namespace pv {
 namespace view {
 
@@ -38,6 +40,15 @@ class ViewWidget : public QWidget
 protected:
        ViewWidget(View &parent);
 
+       /**
+        * 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.
+        * @remarks the default implementation does nothing.
+        */
+       virtual void item_hover(
+               const std::shared_ptr<pv::view::ViewItem> &item);
+
        /**
         * Indicates the event an a view item has been clicked.
         * @param item the view item that has been clicked.
@@ -52,12 +63,34 @@ protected:
         */
        bool accept_drag() const;
 
+       /**
+        * Returns true if the mouse button is down.
+        */
+       bool mouse_down() const;
+
        /**
         * Drag the dragging items by the delta offset.
         * @param delta the drag offset in pixels.
         */
        void drag_items(const QPoint &delta);
 
+       /**
+        * Sets this item into the dragged state.
+        */
+       virtual void drag();
+
+       /**
+        * Drag the background by the delta offset.
+        * @param delta the drag offset in pixels.
+        * @remarks The default implementation does nothing.
+        */
+       virtual void drag_by(const QPoint &delta);
+
+       /**
+        * Sets this item into the un-dragged state.
+        */
+       virtual void drag_release();
+
        /**
         * Gets the items in the view widget.
         */
@@ -84,8 +117,16 @@ protected:
         */
        void mouse_left_release_event(QMouseEvent *event);
 
+       /**
+        * Handles touch begin update and end events.
+        * @param e the event that triggered this handler.
+        */
+       virtual bool touch_event(QTouchEvent *event);
+
 protected:
-       void mousePressEvent(QMouseEvent * event);
+       bool event(QEvent *event);
+
+       void mousePressEvent(QMouseEvent *event);
        void mouseReleaseEvent(QMouseEvent *event);
        void mouseMoveEvent(QMouseEvent *event);
 
@@ -102,10 +143,10 @@ protected:
        QPoint mouse_point_;
        QPoint mouse_down_point_;
        std::shared_ptr<ViewItem> mouse_down_item_;
-       bool dragging_;
+       bool item_dragging_;
 };
 
 } // namespace view
 } // namespace pv
 
-#endif // PULSEVIEW_PV_VIEWWIDGET_H
+#endif // PULSEVIEW_PV_VIEWWIDGET_HPP