code: public Canvas getViewPanel() {
  		VLayout layout = new VLayout(5);
  		layout.setPadding(5);
  
  		MapWidget mapWidget = new MapWidget("mapGuwOsm", "appGuw");
  		final RibbonBarLayout ribbonBar = new RibbonBarLayout(mapWidget, "appGuw", "guwRibbonBar1");
  		ribbonBar.setSize("100%", "94px");
  
  		ToolStrip toolStrip = new ToolStrip();
  		toolStrip.setWidth100();
  		ToolStripButton btn1 = new ToolStripButton("Toggle group title");
  		btn1.addClickHandler(new ClickHandler() {
  
  			public void onClick(ClickEvent event) {
  				ribbonBar.setShowGroupTitles(!ribbonBar.isShowGroupTitles());
  			}
  		});
  		toolStrip.addButton(btn1);
  		layout.addMember(toolStrip);
  		layout.addMember(ribbonBar);
  		layout.addMember(mapWidget);
  		return layout;
  	}
docs: Get view panel.
  
  @return The viewPanel Canvas