org.eclipse.jface.viewers.TreeViewer#getSelection ( )源码实例Demo

public void buildContextMenu( IMenuManager menu )
{
	menu.add( new Separator( IWorkbenchActionConstants.MB_ADDITIONS ) );
	TreeViewer treeViewer = (TreeViewer) getViewer( );

	IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection( );
	
	//temporary solution
	
	if ( selection.size( ) == 1 )
	{
		Object obj = selection.getFirstElement( );
		ScriptProviderFactory.createProvider( obj )
				.createContextMenu( treeViewer, obj, menu );
	}
	else
	{
		ScriptProviderFactory.getDefaultProvider( )
				.createContextMenu( treeViewer, selection, menu );
		
	}
}
 

protected void assertSelected(TreeViewer treeViewer,
		IOutlineNode... expectedSelection) {
	ISelection selection = treeViewer.getSelection();
	assertTrue(selection instanceof IStructuredSelection);
	assertEquals(expectedSelection.length,
			((IStructuredSelection) selection).size());
	OUTER: for (Iterator<?> i = ((IStructuredSelection) selection)
			.iterator(); i.hasNext();) {
		Object selectedObject = i.next();
		assertTrue(selectedObject instanceof IOutlineNode);
		for (IOutlineNode expectedSelected : expectedSelection) {
			if (nodeComparer.equals((IOutlineNode) selectedObject,
					expectedSelected))
				continue OUTER;
		}
		fail("Unexpected selection " + selectedObject.toString());
	}
}
 

private List<XViewerColumn> getTableSelection(TreeViewer xColTableViewer) {
   List<XViewerColumn> xCols = new ArrayList<>();
   IStructuredSelection selection = (IStructuredSelection) xColTableViewer.getSelection();
   if (selection.isEmpty()) {
      return null;
   }
   Iterator<?> i = selection.iterator();
   while (i.hasNext()) {
      xCols.add((XViewerColumn) i.next());
   }
   return xCols;
}
 

protected void assertSelected(TreeViewer aTreeViewer, IOutlineNode... expectedSelection) {
	ISelection selection = aTreeViewer.getSelection();
	assertTrue(selection instanceof IStructuredSelection);
	assertEquals(expectedSelection.length, ((IStructuredSelection) selection).size());
	OUTER: for (Iterator<?> i = ((IStructuredSelection) selection).iterator(); i.hasNext();) {
		Object selectedObject = i.next();
		assertTrue(selectedObject instanceof IOutlineNode);
		for (IOutlineNode expectedSelected : expectedSelection) {
			if (nodeComparer.equals((IOutlineNode) selectedObject, expectedSelected))
				continue OUTER;
		}
		fail("Unexpected selection " + selectedObject.toString());
	}
}
 

protected void assertSelected(TreeViewer treeViewer, IOutlineNode... expectedSelection) {
	ISelection selection = treeViewer.getSelection();
	assertTrue(selection instanceof IStructuredSelection);
	assertEquals(expectedSelection.length, ((IStructuredSelection) selection).size());
	OUTER: for (Iterator<?> i = ((IStructuredSelection) selection).iterator(); i.hasNext();) {
		Object selectedObject = i.next();
		assertTrue(selectedObject instanceof IOutlineNode);
		for (IOutlineNode expectedSelected : expectedSelection) {
			if (nodeComparer.equals((IOutlineNode) selectedObject, expectedSelected))
				continue OUTER;
		}
		fail("Unexpected selection " + selectedObject.toString());
	}
}
 

@Override
public void selectionChanged(SelectionChangedEvent event){
	TreeViewer tv = (TreeViewer) event.getSource();
	StructuredSelection ss = (StructuredSelection) tv.getSelection();
	Object selected = null;
	Object firstElement = ss.isEmpty() ? null : ss.getFirstElement();
	if (firstElement instanceof BlockTreeViewerItem) {
		selected = ((BlockTreeViewerItem) firstElement).getBlock();
	}
	tvfa.updateSelection((Identifiable) selected);
	if (selected != null) {
		ContextServiceHolder.get().getRootContext().setTyped(selected);
	}
}
 

@Override
public void selectionChanged(SelectionChangedEvent event){
	TreeViewer tv = (TreeViewer) event.getSource();
	StructuredSelection ss = (StructuredSelection) tv.getSelection();
	tvfa.updateSelection(ss.isEmpty() ? null : ss.getFirstElement());
	
	if (!ss.isEmpty()) {
		IArticle ea = (IArticle) ss.getFirstElement();
		ContextServiceHolder.get().getRootContext()
			.setNamed("ch.elexis.core.ui.eigenartikel.selection", ea);
	} else {
		ContextServiceHolder.get().getRootContext()
			.setNamed("ch.elexis.core.ui.eigenartikel.selection", null);
	}
}
 

/**
 * Builds the context menu. Single selection menu and multiple selection
 * menu are created while selecting just single element or multiple elements
 * 
 * 
 * @param menu
 *            the menu
 */
public void buildContextMenu( IMenuManager menu )
{
	menu.add( new Separator( IWorkbenchActionConstants.MB_ADDITIONS ) );
	TreeViewer treeViewer = (TreeViewer) getViewer( );

	IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection( );

	// temporary solution
	Object input = treeViewer.getInput( );
	if ( input instanceof Object[] )
	{
		Object[] inputs = (Object[]) input;
		if ( inputs.length == 1 && inputs[0] instanceof ReportDesignHandle )
		{
			for ( Iterator iter = selection.iterator( ); iter.hasNext( ); )
			{
				if ( isIncludedLibrary( iter.next( ) ) )
				{
					return;
				}
			}
		}
	}

	if ( selection.size( ) == 1 )
	{
		// Create Single Selection Menu
		Object obj = selection.getFirstElement( );
		if ( ProviderFactory.createProvider( obj ) != null )
		{
			ProviderFactory.createProvider( obj )
					.createContextMenu( treeViewer, obj, menu );
		}
		if ( Policy.TRACING_MENU_SHOW )
		{
			System.out.println( "Menu(for Views) >> Shows for " + ProviderFactory.createProvider( obj ).getNodeDisplayName( obj ) ); //$NON-NLS-1$
		}
	}
	else
	{
		// Added by ywang on 2004.9.15
		// Create Multiple Selection Menu
		if ( ProviderFactory.getDefaultProvider( ) != null)
		{
			ProviderFactory.getDefaultProvider( )
					.createContextMenu( treeViewer, selection, menu );
		}

		if ( Policy.TRACING_MENU_SHOW )
		{
			System.out.println( "Menu(for Views) >> Shows for multi-selcetion." ); //$NON-NLS-1$
		}
	}
}