X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Fview%2Frowitem.h;h=1aafca4be3fbfee81b663532e9e6a887601d6f12;hb=a5d93c27b5bd6b95000e29c6cddac56ab254b289;hp=6b23162f5808a56c8526115fdfe2c8a7b7fb0b5d;hpb=0dda6fe595932b2e340930104fad8ac4fc574895;p=pulseview.git

diff --git a/pv/view/rowitem.h b/pv/view/rowitem.h
index 6b23162..1aafca4 100644
--- a/pv/view/rowitem.h
+++ b/pv/view/rowitem.h
@@ -21,6 +21,8 @@
 #ifndef PULSEVIEW_PV_VIEW_HEADERITEM_H
 #define PULSEVIEW_PV_VIEW_HEADERITEM_H
 
+#include <memory>
+
 #include "selectableitem.h"
 
 namespace pv {
@@ -28,7 +30,8 @@ namespace view {
 
 class RowItemOwner;
 
-class RowItem : public SelectableItem
+class RowItem : public SelectableItem,
+	public std::enable_shared_from_this<pv::view::RowItem>
 {
 	Q_OBJECT
 
@@ -74,6 +77,12 @@ public:
 	 */
 	QPoint point() const;
 
+	/**
+	 * Computes the vertical extents of the contents of this row item.
+	 * @return A pair containing the minimum and maximum y-values.
+	 */
+	virtual std::pair<int, int> v_extents() const = 0;
+
 	/**
 	 * Paints the background layer of the trace with a QPainter
 	 * @param p the QPainter to paint into.