Merge branch 'Tryibion-better-material-source-window'

Source/Editor/Utilities/Utils.cs

@@ -738,9 +738,10 @@ namespace FlaxEditor.Utilities
 
             var settings = CreateWindowSettings.Default;
             settings.ActivateWhenFirstShown = true;
-            settings.AllowMaximize = false;
+            settings.AllowMaximize = true;
             settings.AllowMinimize = false;
-            settings.HasSizingFrame = false;
+            settings.HasSizingFrame = true;
+            settings.HasBorder = true;
             settings.StartPosition = WindowStartPosition.CenterParent;
             settings.Size = new Float2(500, 600) * (parentWindow?.DpiScale ?? Platform.DpiScale);
             settings.Parent = parentWindow;
@@ -754,10 +755,25 @@ namespace FlaxEditor.Utilities
             };
             copyButton.Clicked += () => Clipboard.Text = source;
 
-            var sourceTextBox = new TextBox(true, 2, copyButton.Bottom + 4, settings.Size.X - 4);
-            sourceTextBox.Height = settings.Size.Y - sourceTextBox.Top - 2;
+            var backPanel = new Panel
+            {
+                AnchorPreset = AnchorPresets.StretchAll,
+                Offsets = new Margin(0, 0, copyButton.Bottom + 4, 0),
+                ScrollBars = ScrollBars.Both,
+                IsScrollable = true,
+                Parent = dialog.GUI,
+            };
+
+            var sourceTextBox = new TextBox(true, 0, 0, 0);
+            sourceTextBox.Parent = backPanel;
+            sourceTextBox.AnchorPreset = AnchorPresets.HorizontalStretchTop;
             sourceTextBox.Text = source;
-            sourceTextBox.Parent = dialog.GUI;
+            sourceTextBox.Height = sourceTextBox.TextSize.Y;
+            sourceTextBox.IsReadOnly = true;
+            sourceTextBox.IsMultilineScrollable = false;
+            sourceTextBox.IsScrollable = true;
+
+            backPanel.SizeChanged += control => { sourceTextBox.Width = (control.Size.X >= sourceTextBox.TextSize.X) ? control.Width : sourceTextBox.TextSize.X + 30; };
 
             dialog.Show();
             dialog.Focus();

Source/Engine/UI/GUI/Common/TextBoxBase.cs

@@ -229,6 +229,11 @@ namespace FlaxEngine.GUI
         [EditorOrder(529)]
         public bool ClipText { get; set; } = true;
 
+        /// <summary>
+        /// Gets or sets a value indicating whether you can scroll the text in the text box (eg. with a mouse wheel).
+        /// </summary>
+        public bool IsMultilineScrollable { get; set; } = true;
+
         /// <summary>
         /// Gets or sets textbox background color when the control is selected (has focus).
         /// </summary>
@@ -1157,7 +1162,7 @@ namespace FlaxEngine.GUI
                 return true;
 
             // Multiline scroll
-            if (IsMultiline && _text.Length != 0)
+            if (IsMultiline && _text.Length != 0 && IsMultilineScrollable)
             {
                 TargetViewOffset = Float2.Clamp(_targetViewOffset - new Float2(0, delta * 10.0f), Float2.Zero, new Float2(_targetViewOffset.X, _textSize.Y));
                 return true;