gridData.heightHint = 500;
	private void createPreviewArea( )	{		cmpPreview = new Composite( cmpTask, SWT.NONE );		cmpPreview.setLayout( new GridLayout( ) );		GridData gridData = new GridData( GridData.FILL_BOTH );		gridData.heightHint = 500;		gridData.heightHint = 250;		cmpPreview.setLayoutData( gridData );		Label label = new Label( cmpPreview, SWT.NONE );		{			label.setText( Messages.getString( "TaskSelectType.Label.Preview" ) ); //$NON-NLS-1$			label.setFont( JFaceResources.getBannerFont( ) );		}		previewCanvas = new Canvas( cmpPreview, SWT.BORDER );		previewCanvas.setLayoutData( new GridData( GridData.FILL_BOTH ) );		previewCanvas.setBackground( Display.getDefault( )				.getSystemColor( SWT.COLOR_WHITE ) );	}