Orthographic/perspective mode toggle

Note: missing dedicated icon!

Source/Editor/Viewport/EditorViewport.cs

@@ -134,6 +134,11 @@ namespace FlaxEditor.Viewport
         /// </summary>
         protected ViewportWidgetButton _cameraButton;
 
+        /// <summary>
+        /// The orthographic mode widget button.
+        /// </summary>
+        protected ViewportWidgetButton _orthographicModeButton;
+
         private readonly Editor _editor;
 
         private float _mouseSensitivity;
@@ -524,6 +529,15 @@ namespace FlaxEditor.Viewport
                 };
                 _cameraWidget.Parent = this;
 
+                // Toggle orthographic mode widget
+                _orthographicModeButton = new ViewportWidgetButton(string.Empty, Editor.Instance.Icons.CamSpeed32, null, true)
+                {
+                    Checked = !_isOrtho,
+                    TooltipText = "Toggle Orthographic/Perspective Mode",
+                    Parent = _cameraWidget,
+                };
+                _orthographicModeButton.Toggled += OnOrthographicModeToggled;
+
                 // Camera speed
                 var camSpeedButton = cameraCM.AddButton("Camera Speed");
                 camSpeedButton.CloseMenuOnClick = false;
@@ -942,6 +956,9 @@ namespace FlaxEditor.Viewport
         {
             _isOrtho = !_isOrtho;
 
+            if (_orthographicModeButton != null)
+                _orthographicModeButton.Checked = !_isOrtho;
+
             if (_isOrtho)
             {
                 var orient = ViewOrientation;