Add a mechanism to make ViewItem classes immovable.

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

diff --git a/pv/view/viewitem.hpp b/pv/view/viewitem.hpp
index 82851e5c2685571b0b063d1c2c816a98299f5234..16b34cb0dc59fb880eed69e92a314ec10a00ce53 100644 (file)
--- a/pv/view/viewitem.hpp
+++ b/pv/view/viewitem.hpp
@@ -66,7 +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.
@@ -81,7 +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.
@@ -99,8 +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.
@@ -108,7 +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.