Added support for clearing the Expression Editor scene.

--HG--
branch : dfighter-tools

code/studio/src/plugins/gui_editor/expression_editor.cpp

@@ -135,6 +135,9 @@ void ExpressionEditor::contextMenuEvent( QContextMenuEvent *e )
 
 		a = menu.addAction( "Save" );
 		connect( a, SIGNAL( triggered() ), this, SLOT( onSave() ) );
+
+		a = menu.addAction( "Clear" );
+		connect( a, SIGNAL( triggered() ), this, SLOT( onClear() ) );
 	}
 
 	menu.exec( e->globalPos() );
@@ -334,6 +337,15 @@ void ExpressionEditor::onSave()
 	close();
 }
 
+void ExpressionEditor::onClear()
+{
+	m_scene->clear();
+	m_pvt->m_root = NULL;
+	m_nodeCount = 0;
+	m_selectionCount = 0;
+	m_result = "";
+}
+
 
 void ExpressionEditor::addExpression( const ExpressionInfo *info )
 {

code/studio/src/plugins/gui_editor/expression_editor.h

@@ -55,6 +55,7 @@ private Q_SLOTS:
 	void onSetRoot();
 	void onBuildExpression();
 	void onSave();
+	void onClear();
 
 private:
 	void addExpression( const ExpressionInfo *info );