Exception during resize

Peter7 wrote at 2012-02-01 10:50:

Hello,

thank you for this great tool, suited perfectly.

During testing our WPF application I encountered an exception in OxyPlot.DataPointSeries.AddDataPoints.
It happened once when I was resizing a window with a plot in it, but I was not able to reproduce this situation.
The plot data are updated periodically in my project, so maybe there was a race condition between updating and resizing?

Maybe the stack trace shown below will help to track down a potential problem.
Anyway I was not able to reproduce it.

Kind regards
Peter

Collection was modified; enumeration operation may not execute.

   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
   at System.Collections.Generic.List`1.Enumerator.MoveNext()
   at OxyPlot.DataPointSeries.AddDataPoints(IList`1 dest, IEnumerable itemsSource, String dataFieldX, String dataFieldY) in D:\Codeplex\OBJO\OxyPlot\trunk\Source\OxyPlot\Series\DataPointSeries.cs:line 313
   at OxyPlot.DataPointSeries.AddDataPoints(IList`1 points) in D:\Codeplex\OBJO\OxyPlot\trunk\Source\OxyPlot\Series\DataPointSeries.cs:line 284
   at OxyPlot.DataPointSeries.UpdateData() in D:\Codeplex\OBJO\OxyPlot\trunk\Source\OxyPlot\Series\DataPointSeries.cs:line 223
   at OxyPlot.AreaSeries.UpdateData() in D:\Codeplex\OBJO\OxyPlot\trunk\Source\OxyPlot\Series\AreaSeries.cs:line 289
   at OxyPlot.PlotModel.Update(Boolean updateData) in D:\Codeplex\OBJO\OxyPlot\trunk\Source\OxyPlot\PlotModel\PlotModel.cs:line 1083
   at OxyPlot.Wpf.Plot.UpdateModel(Boolean updateData) in D:\Codeplex\OBJO\OxyPlot\trunk\Source\OxyPlot.Wpf\Plot.cs:line 1265
   at OxyPlot.Wpf.Plot.CompositionTargetRendering(Object sender, EventArgs e) in D:\Codeplex\OBJO\OxyPlot\trunk\Source\OxyPlot.Wpf\Plot.cs:line 1032
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget)
   at System.Windows.Interop.HwndTarget.OnResize()
   at System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.HwndSubclass.DefWndProcWrapper(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.HwndSubclass.DefWndProcWrapper(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.HwndSubclass.DefWndProcWrapper(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at System.Windows.Application.Run()
   at Keba.KSDD.App.App.Main() in C:\work\Keba.KSDD.SDK\Keba.KSDD.App\obj\x86\Debug\App.g.cs:line 0
   at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

objo wrote at 2012-02-01 11:30:

thanks for reporting the bug! I'll have a look at the DataPointSeries.

the invalidate/update logic in the wpf Plot control should be thread safe (unless I did something wrong). Are you updating the PlotModel directly from your code? I see the PlotModel should also be made thread safe, will add it as an issue!

TorePaulsson wrote at 2014-02-28 09:39:

public int ctr = 0;
        void RefreshElapsed(object sender, ElapsedEventArgs e)
        {
            if (Simulated)
            {
                var link = ctr % 10;
                var series = GetDummySeries("Left" + ctr);
                AddSeriesLeft(series, ChartTypeEnum.Voltage, link);
                series = GetDummySeries("Right" + ctr);
                AddSeriesRight(series, ChartTypeEnum.Voltage, link);
            }
            RightPlot.FadeSeries(127, OxyColors.Blue);
            LeftPlot.FadeSeries(127, OxyColors.Blue);
            Application.Current.Dispatcher.BeginInvoke(new Action(() =>
            {
                RightPlot.RefreshPlot(true);
                LeftPlot.RefreshPlot(true);
            }));
            ctr++;
        }

A first chance exception of type 'System.InvalidOperationException' occurred in OxyPlot.dll

Additional information: XAxis not defined.

Stack:    at OxyPlot.Series.XYAxisSeries.VerifyAxes() in c:\TeamCity\buildAgent\work\3b9fcf1ba397d0ed\Source\OxyPlot\Series\XYAxisSeries.cs:line 417

            LeftPlot.Axes.Add(new LinearAxis(AxisPosition.Bottom, "Time [ms]"));
            RightPlot.Axes.Add(new LinearAxis(AxisPosition.Bottom, "Time [ms]"));

objo wrote at 2014-02-28 11:56:

objo wrote at 2014-03-01 13:16: