DockLayoutPanel.getOffsetHeight return zero even after calling forceLayout()

[tong123123]

there is a simplePanel and the simplePanel add a DockLayoutPanel called AdvancedSearchPanel.
in the AdvancedSearchPanel constructor, the width is set to 100% and height to 1800px.

then there is a menu item and when it is clicked,
I try to add the AdvancedSearchLogsPanel() to simplePanel and then called
advancedSearchLogsPanel.forceLayout()
before calling
advancedSearchLogsPanel.getOffsetWidth() and advancedSearchLogsPanel.getOffsetHeight()
but both return zero!!

what is the problem come from?

[tong123123]

the code is attached as follow:

public class ALS implements EntryPoint {

	ScrollPanel basePanel = new ScrollPanel();
	DockLayoutPanel baseDockLayoutPanel = new DockLayoutPanel(Unit.PX);	
	SimplePanel simpleContentPanel = new SimplePanel();

	public void onModuleLoad() {			
		RootLayoutPanel rootPanel = RootLayoutPanel.get();		
		rootPanel.add(basePanel);
		basePanel.add(baseDockLayoutPanel);
		baseDockLayoutPanel.setSize("1200", "800");		
		baseDockLayoutPanel.addNorth(CommonPanel.getHeaderPanel(), 20);
		baseDockLayoutPanel.addSouth(CommonPanel.getFooterPanel(), 40);		
		FlowPanel leftSidePanel = CommonPanel.getLeftSidePanel();
		FlowPanel menuPanel = new FlowPanel();
		menuPanel.setWidth("150px");
		menuPanel.addStyleName("menu");
		menuPanel.add(buildTree());		
		leftSidePanel.add(menuPanel);
		baseDockLayoutPanel.addWest(leftSidePanel, 220);		
		baseDockLayoutPanel.add(simpleContentPanel);		
		baseDockLayoutPanel.setSize("1024", "800");		
		
	}


	Tree buildTree(){
		Tree treeMenu = new Tree();	
			
		
		final TreeItem searchLogs = new TreeItem("Search Logs");		
		treeMenu.addItem(searchLogs);
		searchLogs.setState(true);		
		
		treeMenu.addSelectionHandler(new SelectionHandler<TreeItem>(){

			@Override
			public void onSelection(SelectionEvent<TreeItem> event) {
				if (event.getSelectedItem().equals(advancedSearchLogs)){
					//System.out.println(splitLayoutPanel.getWidgetCount());
					simpleContentPanel.remove(simpleContentPanel.getWidget());
					simpleContentPanel.add(new AdvancedSearchLogsPanel());					
					advancedSearchLogsPanel.forceLayout();
					baseDockLayoutPanel.forceLayout();	
					
					int width = advancedSearchLogsPanel.getOffsetWidth() + 220;
					int height = advancedSearchLogsPanel.getOffsetHeight()+ 60;
					// Problem here, getOffSetheight() return zero!!
					// AdvancedSearchLogsPanel is a docklayoutPanel
					baseDockLayoutPanel.setSize(String.valueOf(width), String.valueOf(height));
				}
			}});
		return treeMenu;
	}
}

[skippy]

I have had this problem before.
The widget needs to be visible before it knows the size atributes.

Here is some code that might help you. you need to schedule a
deferred commad. Do some searched to understand object.

Hope this helps!

public static void adjustHeight(final DockLayoutPanel topPanel,
final SimplePanel bodyPanel, final DockLayoutPanel outerPanel, final
boolean isIpad)
{
Scheduler.get().scheduleDeferred(new
Scheduler.ScheduledCommand()
{
public void execute()
{
int width = Window.getClientWidth() - 7;
int height = Window.getClientHeight() - 7;
if(isIpad)
{
width = width - 40;

> > what is the problem come from?- Hide quoted text -
>
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