X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=pv%2Fview%2Fviewitem.hpp;h=7579b555cdc460b36207c1f64fcab7f260eca2a9;hb=208c6fc371951fe74ba5a08a0950f2837eef8b7b;hp=3e6801fe3186dffe74c10263f27b4192e95ef871;hpb=49028d6c2d8aaf61b528e2dfb7ad3fe1ccb7169e;p=pulseview.git

diff --git a/pv/view/viewitem.hpp b/pv/view/viewitem.hpp
index 3e6801fe..7579b555 100644
--- 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