public T AddChild <T>(T child) where T : Widget
{
if (child == null)
{
this.LogError("Child must not be null.");
return(null);
}
try {
OnAddChild(child);
Children.Add(child);
if (child.IsOverlay)
{
RootContainer root = Root ?? child.Root;
if (root != null)
{
root.RegisterOverlay(child);
}
}
} catch (Exception ex) {
ex.LogError();
}
return((T)child);
}
/***
* [System.ComponentModel.Browsable(false)]
* internal string _FontTag;
* [System.ComponentModel.Browsable(false)]
* internal string _IconFontTag;
***/
protected override void CleanupManagedResources()
{
m_Parent = null;
m_Root = null;
ContextMenu = null;
base.CleanupManagedResources();
}
public void RefreshCursor()
{
RootContainer root = Root;
if (root != null)
{
root.CTX.SetCursor(Cursor);
}
}
protected override void OnRootChanged()
{
if (IsDisposed)
{
return;
}
base.OnRootChanged();
RootContainer root = Root;
for (int i = 0; i < Children.Count; i++)
{
Children [i].Root = root;
}
}
public virtual void Invalidate(int frames = 0)
{
if (IsLayoutSuspended)
{
return;
}
if (InvalidateOnHeartBeat)
{
invalidateFlag = true;
}
else
{
RootContainer root = Root;
if (root != null)
{
root.Invalidate(frames);
}
}
}
public virtual void RemoveChild(Widget child)
{
if (child == null)
{
return;
}
try {
// cleanup all necessary entries from the Root Container
RootContainer root = Root ?? child.Root;
if (root != null)
{
root.RemoveWidget(child);
}
if (Children.Remove(child))
{
OnChildRemoved(child);
}
} catch (Exception ex) {
ex.LogError();
}
}
/// <summary>
/// This scales the control,
/// Call after setting your properties
/// </summary>
protected virtual void OnParentChanged()
{
if (IsDisposed)
{
return;
}
if (Parent != null)
{
RootContainer root = Parent.Root ?? Parent as RootContainer;
if (root != null)
{
Root = root;
}
ResetCachedLayout();
Parent.ResetCachedLayout();
}
else
{
Root = null;
}
}
public MenuManager(RootContainer root)
{
Root = root;
Observer = new Observer <EventMessage> (OnNext, OnError, OnCompleted);
root.Subscribe(Observer);
}