public void center() {
boundaryPanel.clear();
int left = (Window.getClientWidth() - windowPanel.getOffsetWidth()) >> 1;
int top = (Window.getClientHeight() - windowPanel.getOffsetHeight()) >> 1;
boundaryPanel.add(windowPanel, Window.getScrollLeft() + left, Window.getScrollTop() + top);
left = (Window.getClientWidth() - windowPanel.getOffsetWidth()) >> 1;
top = (Window.getClientHeight() - windowPanel.getOffsetHeight()) >> 1;
boundaryPanel.clear();
boundaryPanel.add(windowPanel, Window.getScrollLeft() + left, Window.getScrollTop() + top);
// hide <embeds>
FrameUtils.toggleEmbedVisibility(false);
}
public void hide() {
boundaryPanel.clear();
RootPanel.get().remove(boundaryPanel);
// show <embeds>
FrameUtils.toggleEmbedVisibility(true);
}