layout_ = new ClickDockLayoutPanel(Style.Unit.PX);
layout_.setStylePrimaryName(themeStyles.minimizedWindow());
int leftPadding = title != null ? 8 : 4;
layout_.addWest(createDiv(themeStyles.left()), leftPadding);
layout_.addEast(createDiv(themeStyles.right()), 8);
HorizontalPanel inner = new HorizontalPanel();
inner.setWidth("100%");
inner.setStylePrimaryName(themeStyles.center());