ViewWidget: Added mouse_down

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

diff --git a/pv/view/viewwidget.hpp b/pv/view/viewwidget.hpp
index 5c8889e3be4cde76d2b91bc6724dd848d7bcb19a..65434f65e1720913ab2589f3cfd932fe1c873b46 100644 (file)
--- a/pv/view/viewwidget.hpp
+++ b/pv/view/viewwidget.hpp
@@ -21,12 +21,15 @@
 #ifndef PULSEVIEW_PV_VIEWWIDGET_H
 #define PULSEVIEW_PV_VIEWWIDGET_H
 
+#include <memory>
+
 #include <QWidget>
 
 namespace pv {
 namespace view {
 
 class View;
+class ViewItem;
 
 class ViewWidget : public QWidget
 {
@@ -35,8 +38,76 @@ class ViewWidget : public QWidget
 protected:
        ViewWidget(View &parent);
 
+       /**
+        * Indicates the event an a view item has been clicked.
+        * @param item the view item that has been clicked.
+        * @remarks the default implementation does nothing.
+        */
+       virtual void item_clicked(
+               const std::shared_ptr<pv::view::ViewItem> &item);
+
+       /**
+        * Returns true if the selection of row items allows dragging.
+        * @return Returns true if the drag is acceptable.
+        */
+       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);
+
+       /**
+        * Gets the items in the view widget.
+        */
+       virtual std::vector< std::shared_ptr<pv::view::ViewItem> > items() = 0;
+
+       /**
+        * Gets the first view item which has a hit-box that contains @c pt .
+        * @param pt the point to search with.
+        * @return the view item that has been found, or and empty
+        *   @c shared_ptr if no item was found.
+        */
+       virtual std::shared_ptr<pv::view::ViewItem> get_mouse_over_item(
+               const QPoint &pt) = 0;
+
+       /**
+        * Handles left mouse button press events.
+        * @param event the mouse event that triggered this handler.
+        */
+       void mouse_left_press_event(QMouseEvent *event);
+
+       /**
+        * Handles left mouse button release events.
+        * @param event the mouse event that triggered this handler.
+        */
+       void mouse_left_release_event(QMouseEvent *event);
+
+protected:
+       void mousePressEvent(QMouseEvent * event);
+       void mouseReleaseEvent(QMouseEvent *event);
+       void mouseMoveEvent(QMouseEvent *event);
+
+       void leaveEvent(QEvent *event);
+
+public Q_SLOTS:
+       void clear_selection();
+
+Q_SIGNALS:
+       void selection_changed();
+
 protected:
        pv::view::View &view_;
+       QPoint mouse_point_;
+       QPoint mouse_down_point_;
+       std::shared_ptr<ViewItem> mouse_down_item_;
+       bool item_dragging_;
 };
 
 } // namespace view