Diagram Editor: exception when changing font

[pbarney]

Applies to: Diagram Library Editor
Version: both Portable 2.0.13 and Portable 2.1.0.0.
Issue: I am getting an exception when attempting to change the Title Text to a font that doesn't have the "Regular" style.

Details:

Exception details: System.ArgumentException: Font 'Brush Script MT' does not support style 'Regular'.
   at System.Drawing.Font.CreateNativeFont()
   at System.Drawing.Font.Initialize(FontFamily family, Single emSize, FontStyle style, GraphicsUnit unit, Byte gdiCharSet, Boolean gdiVerticalFont)

Steps to Reproduce:

1. Enter text into the "Title" input
2. Check the Font checkbox
3. Select a font that does not have a "Regular" style.

For testing purposes, I am attaching a sample font ("Brush Script MT") that only has an "Italic" style.

Brush Script MT Italic.zip

[jonthysell]

Thanks for the bug report. Did you try setting the font style to Italic?

[pbarney]

Yes, and it works if you first select "italic" and then the font after that, but when I was moving between the different options looking for a pattern that reproduces the error, I stumbled into this one while doing just that:

Exception details: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Chordious.WPF.App.EnterUpdatesSource(Object sender, RoutedEventArgs e)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)
   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)
   at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)
   at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
   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)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
   at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(MSG& msg, Boolean& handled)
   at System.Windows.Interop.HwndSource.WeakEventPreprocessMessage.OnPreprocessMessage(MSG& msg, Boolean& handled)
   at System.Windows.Interop.ThreadMessageEventHandler.Invoke(MSG& msg, Boolean& handled)
   at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Window.ShowHelper(Object booleanBox)
   at System.Windows.Window.Show()
   at System.Windows.Window.ShowDialog()
   at Chordious.WPF.MessageHandlers.ShowDiagramEditor(ShowDiagramEditorMessage message)
   at Chordious.WPF.MessageHandlers.<>c.<RegisterMessageHandlers>b__0_8(ShowDiagramEditorMessage message)
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at GalaSoft.MvvmLight.Helpers.WeakAction`1.Execute(T parameter)
   at GalaSoft.MvvmLight.Helpers.WeakAction`1.ExecuteWithObject(Object parameter)
   at GalaSoft.MvvmLight.Messaging.Messenger.SendToList[TMessage](TMessage message, IEnumerable`1 weakActionsAndTokens, Type messageTargetType, Object token)
   at GalaSoft.MvvmLight.Messaging.Messenger.SendToTargetOrType[TMessage](TMessage message, Type messageTargetType, Object token)
   at GalaSoft.MvvmLight.Messaging.Messenger.Send[TMessage](TMessage message)
   at Chordious.Core.ViewModel.ObservableDiagram.<get_ShowEditor>b__147_0()

[jonthysell]

I'm sorry, but I'm not able to reproduce this on my computer.

What version of Windows are you using?