public override void Add(Widget widget)
{
if (this.widget != null) {
throw new Exception("SimplePanel can only contain one child widget");
}
this.Widget = widget;
}
protected void Orphan(Widget child)
{
//assert (child.getParent() == this);
child.Parent = null;
}
protected void Adopt(Widget child)
{
//assert(child.getParent() == null);
child.Parent = this;
}
public abstract bool Remove(Widget widget);
public virtual void Add(Widget widget)
{
throw new NotImplementedException();
}
public override bool Remove(Widget widget)
{
if (this.widget != widget) {
return false;
}
Orphan(widget);
this.Element.removeChild(widget.Element);
this.widget = null;
return true;
}
protected virtual void InitWidget(Widget widget)
{
if (this.Widget != null) {
throw new /*IllegalState*/Exception("Composite.initWidget() may only be called once.");
}
//widget.removeFromParent();
// Use the contained widget's element as the composite's element,
// effectively merging them within the DOM.
this.Element = widget.Element;
this.Widget = widget;
widget.Parent = this;
}
