Toggle Visibility of a Sidebar Element

[Manuel]

Hey,

I try to toggle the visibility of a Element. But I dont get a resizing done :(

I use a DockLayoutPanel:
In the WEST I got a "Sidebar". In the CENTER I got a Frame...

I made the Sidebar invisible via: DOM.setStyleAttribute(SideBar.getElement(), "display", "none");

But the CENTER dont take the free space. (DOM.setStyleAttribute(CenterFrame.getElement(), "position", "relativ"); didnt worked)



Via Firebug i found out, that the center is wrapped in a div-tag that I cannot manipulate.

So anyone know whats the propper way, to make the Sidebar visible/invisible ?

Help is much appreciated.

Thanks in advanced.

Regards

[Alberto Mancini]

Hi,
actually this should work

class MyDockLayoutPanel extends DockLayoutPanel {

        public MyDockLayoutPanel(Unit unit) {
            super(unit);
        }
  
        public void resizeWidget(Widget w, double newSize) {
           
            //XXX ensure it is a widget added to this this layoutpanel
 
            LayoutData ld = (LayoutData) w.getLayoutData();
            ld.size = newSize;
            forceLayout();
        }
               
    }


use newSize=0 to hide.

I remember I used somewhere a similar code but i never really found why LayoutData has been left protected in DockLayoutPanel
and if this approach has to be avoided.

Ciao.

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[Andrea Boscolo]

Actually DockLayoutPanel implements AnimatedLayout thus it has direct animation support.
You simply need to use setWidgetSize(widget, size) and call animate() (if necessary).
Or even simpler use setWidgetHidden(widget) with gwt >= 2.5.

[Manuel]

Hey,
thanks alot, that works well and is pretty easy.

Regards Manuel