added scene tool mode context menu feature

apps/opencs/view/widget/scenetoolmode.cpp

@@ -3,10 +3,24 @@
 #include <QHBoxLayout>
 #include <QFrame>
 #include <QSignalMapper>
+#include <QMenu>
+#include <QContextMenuEvent>
 
 #include "scenetoolbar.hpp"
 #include "modebutton.hpp"
 
+void CSVWidget::SceneToolMode::contextMenuEvent (QContextMenuEvent *event)
+{
+    QMenu menu (this);
+    if (createContextMenu (&menu))
+        menu.exec (event->globalPos());
+}
+
+bool CSVWidget::SceneToolMode::createContextMenu (QMenu *menu)
+{
+    return false;
+}
+
 void CSVWidget::SceneToolMode::adjustToolTip (const ModeButton *activeMode)
 {
     QString toolTip = mToolTip;
@@ -15,6 +29,9 @@ void CSVWidget::SceneToolMode::adjustToolTip (const ModeButton *activeMode)
 
     toolTip += "<p>(left click to change mode)";
 
+    if (createContextMenu (0))
+        toolTip += "<br>(right click to access context menu)";
+
     setToolTip (toolTip);
 }
 

apps/opencs/view/widget/scenetoolmode.hpp

@@ -6,6 +6,7 @@
 #include <map>
 
 class QHBoxLayout;
+class QMenu;
 
 namespace CSVWidget
 {
@@ -29,6 +30,16 @@ namespace CSVWidget
 
             void adjustToolTip (const ModeButton *activeMode);
 
+            virtual void contextMenuEvent (QContextMenuEvent *event);
+
+            /// Add context menu items to \a menu. Default-implementation: return false
+            ///
+            /// \attention menu can be a 0-pointer
+            ///
+            /// \return Have there been any menu items to be added (if menu is 0 and there
+            /// items to be added, the function must return true anyway.
+            virtual bool createContextMenu (QMenu *menu);
+
         public:
 
             SceneToolMode (SceneToolbar *parent, const QString& toolTip);