Bug 320904

Description Benjamin Muskalla 2010-07-26 09:54:28 EDT

When disposing and creating new TreeItems, it may happen that the disposed TreeItems are still visible.

Snippet
-------------------

 Display display = new Display();
    Shell shell = new Shell( display );
    shell.setLayout( new GridLayout( 1, false ) );
    
    final Tree tree = new Tree( shell, SWT.SINGLE | SWT.FULL_SELECTION );
    tree.setLinesVisible( true );
    tree.setHeaderVisible( true );

    final TreeItem treeItem= new TreeItem(tree, SWT.NONE);
    treeItem.setText(0, "java.lang.Object");
    
    TreeItem treeItem2= new TreeItem(treeItem, SWT.NONE);
    treeItem2.setText(0, "byte[]");

    Button button = new Button( shell, SWT.PUSH );
    button.setLayoutData( new GridData( SWT.BEGINNING, SWT.CENTER, false, false ) );
    button.setText("replace contents");
    button.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        tree.getItem( 0 ).dispose();
        
        TreeItem treeItem3= new TreeItem(tree, SWT.NONE);
        treeItem3.setText(0, "java.lang.Object");
        treeItem3.setExpanded( true );
        
        TreeItem treeItem4= new TreeItem(treeItem3, SWT.NONE);
        treeItem4.setText(0, "byte[]");
      }
    });
    
    shell.pack();
    shell.open();
    while( !shell.isDisposed() ) {
      if( !display.readAndDispatch() )
        display.sleep();
    }
    display.dispose();
    return 0;