/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// designereventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this DesignerEventHandler designereventhandler, Object sender, DesignerEventArgs e, AsyncCallback callback)
{
if (designereventhandler == null)
{
throw new ArgumentNullException("designereventhandler");
}
return(designereventhandler.BeginInvoke(sender, e, callback, null));
}
/// <include file='doc\DocumentManager.uex' path='docs/doc[@for="DocumentManager.OnDesignerCreated"]/*' />
/// <devdoc>
/// The designer should call this after it successfully loads.
/// </devdoc>
public void OnDesignerCreated(DesignerEventArgs e)
{
designers.Add(e.Designer);
documents = null;
DesignerEventHandler handler = (DesignerEventHandler)eventTable[DOCUMENT_CREATED_EVENT];
if (handler != null)
{
handler.Invoke(this, e);
}
}
/// <include file='doc\DocumentManager.uex' path='docs/doc[@for="DocumentManager.OnDesignerDisposed"]/*' />
/// <devdoc>
/// The designer should call this before it disposes itself.
/// </devdoc>
public void OnDesignerDisposed(DesignerEventArgs e)
{
DesignerEventHandler handler = (DesignerEventHandler)eventTable[DOCUMENT_DISPOSED_EVENT];
if (handler != null)
{
handler.Invoke(this, e);
}
if (designers.Contains(e.Designer))
{
designers.Remove(e.Designer);
}
if (activeDesigner == e.Designer)
{
activeDesigner = null;
}
documents = null;
}
internal void OnCreateDesigner(DesignSurface surface)
{
IDesignerHost service = surface.GetService(typeof(IDesignerHost)) as IDesignerHost;
if (this._designerList == null)
{
this._designerList = new ArrayList();
}
this._designerList.Add(service);
surface.Disposed += new EventHandler(this.OnDesignerDisposed);
if (this._events != null)
{
DesignerEventHandler handler = this._events[EventDesignerCreated] as DesignerEventHandler;
if (handler != null)
{
handler(this, new DesignerEventArgs(service));
}
}
}
private void OnDesignerDisposed(object sender, EventArgs e)
{
DesignSurface provider = (DesignSurface)sender;
provider.Disposed -= new EventHandler(this.OnDesignerDisposed);
this.SinkChangeEvents(provider, false);
IDesignerHost service = provider.GetService(typeof(IDesignerHost)) as IDesignerHost;
if (service != null)
{
if (this._events != null)
{
DesignerEventHandler handler = this._events[EventDesignerDisposed] as DesignerEventHandler;
if (handler != null)
{
handler(this, new DesignerEventArgs(service));
}
}
if (this._designerList != null)
{
this._designerList.Remove(service);
}
}
}