Add a menu entry clear

Allow to clear the graph and start over.

src/MainWindow.cpp

@@ -106,7 +106,8 @@ MainWindow::MainWindow(QWidget *parent, Qt::WindowFlags flags):
 	QAction *pactFlush = ptb -> addAction(QIcon(pxFulsh), "Flush");
 	connect(pactFlush, SIGNAL(triggered()), SLOT(Flush()));
 
-
+	QAction *pactClear = ptb -> addAction("Clear");
+	connect(pactClear, SIGNAL(triggered()), SLOT(ClearGraph()));
 	ptb -> addSeparator();
 
 	m_pslider = new SeekSlider();
@@ -142,6 +143,8 @@ MainWindow::MainWindow(QWidget *parent, Qt::WindowFlags flags):
 	pmenu -> addAction(pactPause);
 	pmenu -> addAction(pactStop);
 	pmenu -> addAction(pactFlush);
+	pmenu -> addSeparator();
+	pmenu -> addAction(pactClear);
 
 
 	pmenu = menuBar() -> addMenu("&Help");
@@ -260,6 +263,13 @@ void MainWindow::Flush()
 	}
 }
 
+void MainWindow::ClearGraph()
+{
+	qDebug() << "ClearGraph";
+	PipelineIE::Clear(m_pGraph);
+}
+
+
 
 void MainWindow::Seek(int val)
 {

src/MainWindow.h

@@ -40,6 +40,7 @@ class MainWindow: public QMainWindow
 		void SaveAs();
 		void Open();
 
+		void ClearGraph();
 		void About();
 
 	private:

src/PipelineIE.cpp

@@ -620,3 +620,10 @@ bool PipelineIE::Import(QSharedPointer<GraphManager> pgraph, const QString &file
 
 	return true;
 }
+
+bool PipelineIE::Clear(QSharedPointer<GraphManager> pgraph)
+{
+	GstElement *pipeline = pgraph -> m_pGraph;
+	clearPipeline(pipeline);
+	return true;
+}

src/PipelineIE.h

@@ -10,6 +10,7 @@ namespace PipelineIE
 {
 	bool Export(QSharedPointer<GraphManager> pgraph, const QString &fileName);
 	bool Import(QSharedPointer<GraphManager> pgraph, const QString &fileName);
+	bool Clear(QSharedPointer<GraphManager> pgraph);
 };
 
 #endif