WinGui: Don't grab previews when the preview window hasn't been opened. (Note, there is still a crash that sometimes happens for some resolutions that needs fixed, but the UI shouldn't crash anymore if the window hasn't been opened)

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6205 b64f7644-9d1e-0410-96f1-a4d463321fa5

1 files changed, 3 insertions, 1 deletions

diff --git a/win/CS/HandBrakeWPF/ViewModels/PictureSettingsViewModel.cs b/win/CS/HandBrakeWPF/ViewModels/PictureSettingsViewModel.cs
index b10c0f292..51c018ad9 100644
--- a/win/CS/HandBrakeWPF/ViewModels/PictureSettingsViewModel.cs
+++ b/win/CS/HandBrakeWPF/ViewModels/PictureSettingsViewModel.cs
@@ -12,6 +12,7 @@ namespace HandBrakeWPF.ViewModels
     using System;

     using System.Collections.Generic;

     using System.Globalization;

+    using System.Windows;

     using System.Windows.Media.Imaging;

 

     using Caliburn.Micro;

@@ -825,6 +826,7 @@ namespace HandBrakeWPF.ViewModels
         {

             if (!string.IsNullOrEmpty(this.Task.Source))

             {

+                this.StaticPreviewViewModel.IsOpen = true;

                 this.StaticPreviewViewModel.UpdatePreviewFrame(this.Task);

                 this.WindowManager.ShowWindow(this.StaticPreviewViewModel);

             }

@@ -1197,7 +1199,7 @@ namespace HandBrakeWPF.ViewModels
         /// </summary>

         private void UpdatePreviewImage()

         {

-            if (delayedPreviewprocessor != null && this.Task != null)

+            if (delayedPreviewprocessor != null && this.Task != null && this.StaticPreviewViewModel != null && this.StaticPreviewViewModel.IsOpen)

             {

                 delayedPreviewprocessor.PerformTask(() => this.StaticPreviewViewModel.UpdatePreviewFrame(this.Task), 800);

             }