ViewWidget: Added mouse_down

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

diff --git a/pv/view/viewitem.hpp b/pv/view/viewitem.hpp
index 3e6801fe3186dffe74c10263f27b4192e95ef871..7579b555cdc460b36207c1f64fcab7f260eca2a9 100644 (file)
--- a/pv/view/viewitem.hpp
+++ b/pv/view/viewitem.hpp
@@ -44,6 +44,7 @@ class ViewItem : public QObject
        Q_OBJECT
 
 public:
+       static const QSizeF LabelPadding;
        static const int HighlightRadius;
 
 public:
@@ -70,11 +71,6 @@ public:
         */
        bool dragging() const;
 
-       /**
-        * Retunrns the current drag point.
-        */
-       QPoint drag_point() const;
-
        /**
         * Sets this item into the dragged state.
         */
@@ -85,10 +81,17 @@ public:
         */
        void drag_release();
 
+       /**
+        * Drags the item to a delta relative to the drag point.
+        * @param delta the offset from the drag point.
+        */
+       virtual void drag_by(const QPoint &delta) = 0;
+
        /**
         * Get the drag point.
+        * @param rect the rectangle of the widget area.
         */
-       virtual QPoint point() const = 0;
+       virtual QPoint point(const QRect &rect) const = 0;
 
        /**
         * Computes the outline rectangle of a label.
@@ -97,6 +100,14 @@ public:
         */
        virtual QRectF label_rect(const QRectF &rect) const = 0;
 
+       /**
+        * Computes the outline rectangle of the viewport hit-box.
+        * @param rect the rectangle of the viewport area.
+        * @return Returns the rectangle of the hit-box.
+        * @remarks The default implementation returns an empty hit-box.
+        */
+       virtual QRectF hit_box_rect(const QRectF &rect) const;
+
        /**
         * Paints the signal label.
         * @param p the QPainter to paint into.
@@ -147,10 +158,10 @@ protected:
 
 protected:
        QWidget *context_parent_;
+       QPoint drag_point_;
 
 private:
        bool selected_;
-       QPoint drag_point_;
 };
 
 } // namespace view