[news.eclipse.tools.gef] ZoomManager reference for Zest GraphViewer

[g_sridhar258@xxxxxxxxxxx (sridhar )]

Hi,
  I am using Zest for visualization.I have a scenario where I need to 
have zoom capabilities from toolbar of a editorpart.I have created form in 
EditorPart.In the form I have created a toolbar for which I need zoom 
capabilities.

Following is the code snippet:

viewer=new GraphViewer(parent,SWT.NONE);
		viewer.setContentProvider(new MyContentProvider());
		viewer.setLabelProvider(new MyLabelProvider());
		viewer.setConnectionStyle(ZestStyles.CONNECTIONS_DIRECTED|ZestStyles.CONNECTIONS_SOLID);
		viewer.setLayoutAlgorithm(new 
SpringLayoutAlgorithm(LayoutStyles.NO_LAYOUT_NODE_RESIZING));
		viewer.setInput(new Object());
toolbarZoomContributionViewItem = new ZoomContributionViewItem(this);
ToolBarManager tbMgr = new ToolBarManager();
	tbMgr.add(toolbarZoomContributionViewItem );


      Zoom options are working fine for contextmenu operations, but if I 
want to get zoom options through toolbar by passing contribution item,its 
not possible.

   I found zoomTo() method in GraphViewer, but it do not work.
Is there any way to get the ZoomManager reference?