/// <summary>
/// Called from the DrawingContext when the DrawingContext is closed.
/// </summary>
internal override void RenderClose(IDrawingContent newContent)
{
IDrawingContent oldContent;
//
// First cleanup the old content and the state associate with this node
// related to it's content.
//
oldContent = _content;
_content = null;
if (oldContent != null)
{
//
// Remove the notification handlers.
//
oldContent.PropagateChangedHandler(ContentsChangedHandler, false /* remove */);
//
// Disconnect the old content from this visual.
//
DisconnectAttachedResource(
VisualProxyFlags.IsContentConnected,
((DUCE.IResource)oldContent));
}
//
// Prepare the new content.
//
if (newContent != null)
{
// Propagate notification handlers.
newContent.PropagateChangedHandler(ContentsChangedHandler, true /* adding */);
}
_content = newContent;
//
// Mark the visual dirty on all channels and propagate
// the flags up the parent chain.
//
SetFlagsOnAllChannels(true, VisualProxyFlags.IsContentDirty);
PropagateFlags(
this,
VisualFlags.IsSubtreeDirtyForPrecompute,
VisualProxyFlags.IsSubtreeDirtyForRender);
}
/// <summary>
/// This method is overrided on Visuals that can instantiate IDrawingContext
/// Currently, DrawingVisual and UIElement
/// </summary>
internal virtual void RenderClose(IDrawingContent newContent)
{
}
/// <summary>
/// Called from the DrawingContext when the DrawingContext is closed.
/// </summary>
internal override void RenderClose(IDrawingContent newContent)
{
IDrawingContent oldContent;
//
// First cleanup the old content and the state associate with this node
// related to it's content.
//
oldContent = _content;
_content = null;
if (oldContent != null)
{
//
// Remove the notification handlers.
//
oldContent.PropagateChangedHandler(ContentsChangedHandler, false /* remove */);
//
// Disconnect the old content from this visual.
//
DisconnectAttachedResource(
VisualProxyFlags.IsContentConnected,
((DUCE.IResource)oldContent));
}
//
// Prepare the new content.
//
if (newContent != null)
{
// Propagate notification handlers.
newContent.PropagateChangedHandler(ContentsChangedHandler, true /* adding */);
}
_content = newContent;
//
// Mark the visual dirty on all channels and propagate
// the flags up the parent chain.
//
SetFlagsOnAllChannels(true, VisualProxyFlags.IsContentDirty);
PropagateFlags(
this,
VisualFlags.IsSubtreeDirtyForPrecompute,
VisualProxyFlags.IsSubtreeDirtyForRender);
}
