Allows user to left click to end editing text and right click to change text back to its original and end editing.

Source/Editor/GUI/Input/SliderControl.cs

@@ -371,6 +371,7 @@ namespace FlaxEditor.GUI.Input
                 Parent = this,
                 Location = new Float2(split, 0),
                 Size = new Float2(Height, TextBoxSize),
+                CanEndEditByClick = true,
             };
             _textBox.EditEnd += OnTextBoxEditEnd;
         }

Source/Editor/GUI/Input/ValueBox.cs

@@ -125,6 +125,7 @@ namespace FlaxEditor.GUI.Input
             _min = min;
             _max = max;
             _slideSpeed = sliderSpeed;
+            CanEndEditByClick = true;
         }
 
         /// <summary>
@@ -173,6 +174,7 @@ namespace FlaxEditor.GUI.Input
         private void EndSliding()
         {
             _isSliding = false;
+            CanEndEditByClick = true;
             EndMouseCapture();
             if (_cursorChanged)
             {
@@ -245,6 +247,7 @@ namespace FlaxEditor.GUI.Input
                 _startSlideLocation = location;
                 _startSlideValue = _value;
                 StartMouseCapture(true);
+                CanEndEditByClick = false;
 
                 // Hide cursor and cache location
                 Cursor = CursorType.Hidden;

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

@@ -139,6 +139,12 @@ namespace FlaxEngine.GUI
         /// </summary>
         public event Action<KeyboardKeys> KeyUp;
 
+        /// <summary>
+        /// Gets or sets a value indicating whether the text box can end edit via left click outside of the control
+        /// </summary>
+        [HideInEditor]
+        public bool CanEndEditByClick { get; set; } = false;
+        
         /// <summary>
         /// Gets or sets a value indicating whether this is a multiline text box control.
         /// </summary>
@@ -1041,6 +1047,26 @@ namespace FlaxEngine.GUI
 
             // Animate view offset
             _viewOffset = isDeltaSlow ? _targetViewOffset : Float2.Lerp(_viewOffset, _targetViewOffset, deltaTime * 20.0f);
+            
+            // Clicking outside of the text box will end text editing. Left will keep the value, right will restore original value
+            if (_isEditing && CanEndEditByClick)
+            {
+                if (!IsMouseOver && RootWindow.ContainsFocus)
+                {
+                    if (Input.GetMouseButtonDown(MouseButton.Left))
+                    {
+                        RemoveFocus();
+                    }
+                    else if (Input.GetMouseButtonDown(MouseButton.Right))
+                    {
+                        // Restore text from start
+                        SetSelection(-1);
+                        _text = _onStartEditValue;
+                        OnTextChanged();
+                        RemoveFocus();
+                    }
+                }
+            }
 
             base.Update(deltaTime);
         }