add screenshot

README.md

@@ -46,6 +46,12 @@ Step 2：Add code in App.xaml as follows:
 ```
 Step 3：enjoy coding
 
+## Overview
+
+![Overview](https://raw.githubusercontent.com/NaBian/HandyControl/master/Resources/Overview.png)
+
+![Overview-dark](https://raw.githubusercontent.com/NaBian/HandyControl/master/Resources/Overview-dark.png)
+
 ## Latest examples
 
 ### SideMenu

src/Shared/HandyControlDemo_Shared/UserControl/Main/OverView.xaml

@@ -361,7 +361,7 @@
                     <controls:Tag ShowCloseButton="False" Content="TextText"/>
                 </controls:TagPanel>
             </Border>
-            <Border Visibility="Collapsed" Width="14" Height="14" Background="Black" Canvas.Left="290" Canvas.Top="1040"/>
+            <!--<Border Visibility="Collapsed" Width="14" Height="14" Background="Black" Canvas.Left="290" Canvas.Top="1040"/>-->
         </Canvas>
     </ScrollViewer>
 </UserControl>

src/Shared/HandyControl_Shared/Controls/Other/TransitioningContentControl.cs

@@ -48,10 +48,10 @@ namespace HandyControl.Controls
 
         public override void OnApplyTemplate()
         {
-            //if (DesignerProperties.GetIsInDesignMode(this)) return;
+            if (DesignerProperties.GetIsInDesignMode(this)) return;
 
-            //if (IsTransitioning)
-            //    AbortTransition();
+            if (IsTransitioning)
+                AbortTransition();
 
             base.OnApplyTemplate();
 
@@ -63,17 +63,17 @@ namespace HandyControl.Controls
             if (CurrentContentPresentationSite != null)
                 CurrentContentPresentationSite.Content = Content;
 
-            //var transition = GetStoryboard(Transition);
-            //CurrentTransition = transition;
-            //if (transition == null)
-            //{
-            //    Transition = DefaultTransitionState;
+            var transition = GetStoryboard(Transition);
+            CurrentTransition = transition;
+            if (transition == null)
+            {
+                Transition = DefaultTransitionState;
 
-            //    throw new ArgumentException("TransitioningContentControl_TransitionNotFound");
-            //}
+                throw new ArgumentException("TransitioningContentControl_TransitionNotFound");
+            }
 
-            //VisualStateManager.GoToState(this, NormalState, false);
-            //VisualStateManager.GoToState(this, Transition, true);
+            VisualStateManager.GoToState(this, NormalState, false);
+            VisualStateManager.GoToState(this, Transition, true);
         }
 
         protected override void OnContentChanged(object oldContent, object newContent)