currSizeH = Window.getClientHeight();
RootPanel.get(id).setPixelSize(currSizeW, currSizeH);
mainLayoutPanel.setPixelSize(currSizeW, currSizeH);
addResizeHandler(new ResizeHandler() {
public void onResize(ResizeEvent event) {
RootPanel.get(id).setPixelSize(event.getWidth(), event.getHeight());
mainLayoutPanel.setPixelSize(event.getWidth(), event.getHeight());
fireWorkspaceSizeChangeListeners(event.getWidth() - currSizeW, event.getHeight() - currSizeH);