X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fview%2Fviewitem.hpp;h=a4eb6aef30423a79beefa6fa616357cdb8f3a483;hp=5b80c4e86efdb8fe3e9a95320bcd3aa232cd65a4;hb=0c2389230c90d8bf34b601c625bcf655b24e8f52;hpb=0f2f14a4307b1c5952e3cb683e5049ae33c0da1b

diff --git a/pv/view/viewitem.hpp b/pv/view/viewitem.hpp
index 5b80c4e8..a4eb6aef 100644
--- a/pv/view/viewitem.hpp
+++ b/pv/view/viewitem.hpp
@@ -39,6 +39,8 @@ class Popup;
 
 namespace view {
 
+class ViewItemOwner;
+
 class ViewItem : public QObject
 {
 	Q_OBJECT
@@ -64,7 +66,12 @@ public:
 	/**
 	 * Selects or deselects the signal.
 	 */
-	void select(bool select = true);
+	virtual void select(bool select = true);
+
+	/**
+	 * Returns true if the item may be dragged/moved.
+	 */
+	virtual bool is_draggable() const;
 
 	/**
 	 * Returns true if the item is being dragged.
@@ -79,7 +86,7 @@ public:
 	/**
 	 * Sets this item into the un-dragged state.
 	 */
-	void drag_release();
+	virtual void drag_release();
 
 	/**
 	 * Drags the item to a delta relative to the drag point.
@@ -97,8 +104,9 @@ public:
 	 * Computes the outline rectangle of a label.
 	 * @param rect the rectangle of the header area.
 	 * @return Returns the rectangle of the signal label.
+	 * @remarks The default implementation returns an empty rectangle.
 	 */
-	virtual QRectF label_rect(const QRectF &rect) const = 0;
+	virtual QRectF label_rect(const QRectF &rect) const;
 
 	/**
 	 * Computes the outline rectangle of the viewport hit-box.
@@ -106,7 +114,7 @@ public:
 	 * @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;
+	virtual QRectF hit_box_rect(const ViewItemPaintParams &pp) const;
 
 	/**
 	 * Paints the signal label.
@@ -114,27 +122,27 @@ public:
 	 * @param rect the rectangle of the header area.
 	 * @param hover true if the label is being hovered over by the mouse.
 	 */
-	virtual void paint_label(QPainter &p, const QRect &rect, bool hover) = 0;
+	virtual void paint_label(QPainter &p, const QRect &rect, bool hover);
 
 	/**
 	 * Paints the background layer of the item with a QPainter
 	 * @param p the QPainter to paint into.
 	 * @param pp the painting parameters object to paint with.
-	 **/
+	 */
 	virtual void paint_back(QPainter &p, const ViewItemPaintParams &pp);
 
 	/**
 	 * Paints the mid-layer of the item with a QPainter
 	 * @param p the QPainter to paint into.
 	 * @param pp the painting parameters object to paint with.
-	 **/
+	 */
 	virtual void paint_mid(QPainter &p, const ViewItemPaintParams &pp);
 
 	/**
 	 * Paints the foreground layer of the item with a QPainter
 	 * @param p the QPainter to paint into.
 	 * @param pp the painting parameters object to paint with.
-	 **/
+	 */
 	virtual void paint_fore(QPainter &p, const ViewItemPaintParams &pp);
 
 public: