Hi,

If you are trying to measure how much text will fit on a single line, try setting the TextWrapping value to NoWrap. Also we have recently added a TextPadding property, whose value you might have to add to the size returned by MeasureString.

There's a TextAttributes class coming with the control that implements that interface, so you don't have to do that. DiagramItem also implement it, and you can pass the node instance to MeasureString, instead of a separate object.

Stoyan

Hello, Stoyan.
Have a problem. I draw the diagram, save it into zipped xml. After that I restore diagram from this file and open an edit dialog to change properties of the node. I never change and press Ok. After that I try to modify node and create the ChangeItemCmd object. And after that program craches:
A first chance exception of type 'System.NullReferenceException' occurred in MindFusion.Diagramming.Wpf.dll
Step into: Stepping over method without symbols 'System.Windows.Threading.ExceptionWrapper.TryCatchWhen'
Step into: Stepping over method without symbols 'System.Windows.Threading.ExceptionWrapper.TryCatchWhen'
An unhandled exception of type 'System.NullReferenceException' occurred in MindFusion.Diagramming.Wpf.dll

Here is a code fragment:

dlg.WindowStartupLocation = WindowStartupLocation.CenterScreen;
			  if ((bool)dlg.ShowDialog())
			  {
				m_UndoMngrChItemCompositeCmd = new ChangeItemCmd(node, "Изменение входов и выходов");
 

Where is a problem?

Yes, I could do this. But there is some problem. I use ShapeNode as base class for my derived. And that's why I have in this class my functions SaveToXml and LoadFromXml defined as

	  /// <summary>
	  /// Saves the item content into an XML element
	  /// </summary>
	  /// <param name="xmlElement">An XmlElement the item's data should be stored into</param>
	  /// <param name="context">An XmlPersistContext object providing contextual information about the serialization process and some helper serialization methods</param>
	  protected override void SaveToXml(XmlElement xmlElement, XmlPersistContext context)
	  {
		base.SaveToXml(xmlElement, context);
		context.WriteInt(OutputNumber, "OutputNumber", xmlElement);
		context.WriteInt(InputNumber, "InputNumber", xmlElement);
		context.WriteUShort((ushort)Type, "ElementType", xmlElement);
		context.WriteBool(m_ShadowProps.ShowShadows, "ShowShadows", xmlElement);
		context.WriteDouble(m_ShadowProps.ShadowDepth, "ShadowDepth", xmlElement);
		context.WriteColor(m_ShadowProps.ShadowColor, "ShadowColor", xmlElement);
		context.WriteBool(m_bShowAnchorIdxs, "ShowAnchorIdxs", xmlElement);
	  }
	  /// <summary>
	  /// Loads the item content from an XML element
	  /// </summary>
	  /// <param name="xmlElement">An XmlElement containing the item's data</param>
	  /// <param name="context">An XmlPersistContext object providing contextual information about the serialization process and some helper serialization methods</param>
	  protected override void LoadFromXml(XmlElement xmlElement, XmlPersistContext context)
	  {
		base.LoadFromXml(xmlElement, context);
		OutputNumber = context.ReadInt("OutputNumber", xmlElement);
		InputNumber = context.ReadInt("InputNumber", xmlElement);
		Type = (NodeType)context.ReadUShort("ElementType", xmlElement);
		m_ShadowProps.ShowShadows = context.ReadBool("ShowShadows", xmlElement);
		m_ShadowProps.ShadowDepth = context.ReadDouble("ShadowDepth", xmlElement);
		m_ShadowProps.ShadowColor = context.ReadColor("ShadowColor", xmlElement);
		m_bShowAnchorIdxs = context.ReadBool("ShowAnchorIdxs", xmlElement);
	  }
 

And I don't sure that you can Load this file. May be it would be easy for you if I send you my application source code whith this file?

No