I have no idea how to reproduce this, but every so often after a paste operation into a RadRichTextBox, the host thread becomes unresponsive to user input. The message pump is still running but the following unhandled exception gets thrown in a tight infinite loop. The only way to close the window is to right click on the taskbar button.
System.NullReferenceException
Message: Object reference not set to an instance of an object.
Call Stack:
at Telerik.Windows.Documents.Layout.LayoutElement.SetParent(LayoutElement newParent)
at Telerik.Windows.Documents.Layout.LayoutBox.EnsureParent()
at Telerik.Windows.Documents.Layout.LayoutBox.get_Parent()
at Telerik.Windows.Documents.Layout.FormattingSymbolLayoutBox.get_IsEndOfCell()
at Telerik.Windows.Documents.Layout.FormattingSymbolLayoutBox.GetFormattingSymbolVisual()
at Telerik.Windows.Documents.SpanBoxPositionHandler.get_Location()
at Telerik.Windows.Documents.UI.DocumentWebLayoutPresenter.GetViewPointFromDocumentPosition(DocumentPosition position)
at Telerik.Windows.Controls.RichTextBoxUI.PasteOptionsPopup.CalculateLocation()
at Telerik.Windows.Controls.RichTextBoxUI.PasteOptionsPopup.OnOwnerLayoutUpdated(Object sender, EventArgs e)
at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
In localizing your demo code for a RichTextBox I noticed some size mode-related inconsistencies in icon placements in the various sorts of buttons:
In Size=large, generally the icon appears above the button text. In the split button the icon is centered over and partially obscures the text. Unacceptable!
In Size=medium, generally the icon appears to the left of the text. In the Split button it appears below the text. Either is fine but should be consistent.
Also, when Size=medium and icon beside text, in all buttons I would like to see more spacing between the icon and the text; there seems to be virtually none.
A reference in DocumentFragment to RadDocument (CopySource property) can cause a memory after copy-paste between RadDocument.
Workaround:
public static bool ReleaseClipboardExReferences(
RadDocument document)
{
dynamic clipboardEx = new DynamicProxyObject(typeof(ClipboardEx));
if (clipboardEx.documentClipboardData?.CopySource is DynamicProxyObject copySource
&& object.ReferenceEquals(copySource.Instance, document))
{
clipboardEx.documentClipboardData = null;
return true;
}
if (clipboardEx.CopiedDocumentFragment?.Fragment?.CopySource is DynamicProxyObject fragmentCopySource
&& object.ReferenceEquals(fragmentCopySource.Instance, document))
{
clipboardEx.CopiedDocumentFragment = null;
return true;
}
return false;
}
Use the attached project to reproduce:
- Click the first button so the image is changed
- Click the second button and examine the exported HTML
Expected: the Uri is exported
Actual: the Uri is not exported.
Workaround:
p.Inlines.AddAfter(image, image2);p.Inlines.Remove(image);
The following fixes the issue in PasteOptionsPopup.cs
private bool SetLocation(Point location)
{
if (this.HorizontalOffset != location.X || this.VerticalOffset != location.Y)
{
this.HorizontalOffset = location.X;
this.VerticalOffset = location.Y;
return true;
}
// added the following 5 lines to trigger the popup to recalculate it's location
else
{
this.VerticalOffset++;
this.VerticalOffset--;
}
return false;
}