Added autoscroll disable for log window.. fuck wpf.

Torch.Server/Views/TorchUI.xaml.cs

@@ -10,6 +10,7 @@ using System.Windows.Controls;
 using System.Windows.Data;
 using System.Windows.Documents;
 using System.Windows.Input;
+using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
 using System.Windows.Shapes;
@@ -31,6 +32,8 @@ namespace Torch.Server
         private TorchServer _server;
         private TorchConfig _config;
 
+        private bool _autoscrollLog = true;
+
         public TorchUI(TorchServer server)
         {
             WindowStartupLocation = WindowStartupLocation.CenterScreen;
@@ -57,6 +60,14 @@ namespace Torch.Server
             Themes.uiSource = this;
             Themes.SetConfig(_config);
             Title = $"{_config.InstanceName} - Torch {server.TorchVersion}, SE {server.GameVersion}";
+            
+            Loaded += TorchUI_Loaded;
+        }
+
+        private void TorchUI_Loaded(object sender, RoutedEventArgs e)
+        {
+            var scrollViewer = FindDescendant<ScrollViewer>(ConsoleText);
+            scrollViewer.ScrollChanged += ConsoleText_OnScrollChanged;
         }
 
         private void AttachConsole()
@@ -69,7 +80,52 @@ namespace Torch.Server
                 doc = (wrapped?.WrappedTarget as FlowDocumentTarget)?.Document;
             }
             ConsoleText.Document = doc ?? new FlowDocument(new Paragraph(new Run("No target!")));
-            ConsoleText.TextChanged += (sender, args) => ConsoleText.ScrollToEnd();
+            ConsoleText.TextChanged += ConsoleText_OnTextChanged;
+        }
+
+        public static T FindDescendant<T>(DependencyObject obj) where T : DependencyObject
+        {
+            if (obj == null) return default(T);
+            int numberChildren = VisualTreeHelper.GetChildrenCount(obj);
+            if (numberChildren == 0) return default(T);
+
+            for (int i = 0; i < numberChildren; i++)
+            {
+                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
+                if (child is T)
+                {
+                    return (T)child;
+                }
+            }
+
+            for (int i = 0; i < numberChildren; i++)
+            {
+                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
+                var potentialMatch = FindDescendant<T>(child);
+                if (potentialMatch != default(T))
+                {
+                    return potentialMatch;
+                }
+            }
+
+            return default(T);
+        }
+
+        private void ConsoleText_OnTextChanged(object sender, TextChangedEventArgs args)
+        {
+            var textBox = (RichTextBox) sender;
+            if (_autoscrollLog)
+                ConsoleText.ScrollToEnd();
+        }
+        
+        private void ConsoleText_OnScrollChanged(object sender, ScrollChangedEventArgs e)
+        {
+            var scrollViewer = (ScrollViewer) sender;
+            if (e.ExtentHeightChange == 0)
+            {
+                // User change.
+                _autoscrollLog = scrollViewer.VerticalOffset == scrollViewer.ScrollableHeight;
+            }
         }
 
         public void LoadConfig(TorchConfig config)