add GifImage

Currently, there are only a few basic features, and more features will be added in version 2.0

HandyControlDemo/UserControl/Controls/GifImageDemoCtl.xaml

@@ -0,0 +1,13 @@
+<UserControl x:Class="HandyControlDemo.UserControl.GifImageDemoCtl"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:controls="clr-namespace:HandyControl.Controls;assembly=HandyControl"
+             Background="{DynamicResource RegionBrush}">
+    <controls:TransitioningContentControl>
+           <controls:GifImage x:Name="GifImageMain" Margin="32" Width="400" Height="300">
+               <controls:GifImage.Source>
+                <BitmapImage UriSource="/HandyControlDemo;component/Resources/Img/car_chase.gif"/>
+               </controls:GifImage.Source>
+           </controls:GifImage>
+    </controls:TransitioningContentControl>
+</UserControl>

HandyControlDemo/UserControl/Controls/GifImageDemoCtl.xaml.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace HandyControlDemo.UserControl
+{
+    public partial class GifImageDemoCtl : IDisposable
+    {
+        public GifImageDemoCtl()
+        {
+            InitializeComponent();
+        }
+
+        public void Dispose()
+        {
+            GifImageMain.Dispose();
+        }
+    }
+}

HandyControlDemo/UserControl/Main/LeftMainContent.xaml

@@ -199,6 +199,11 @@
                         <Image Source="../../Resources/Img/LeftMainContent/Tag_16x.png"/>
                     </controls:EdgeElement.LeftContent>
                 </ListBoxItem>
+                <ListBoxItem Style="{StaticResource ListBoxItemNew}" Tag="{x:Static data:MessageToken.GifImageDemoCtl}" Content="{x:Static langs:Lang.GifImage}">
+                    <controls:EdgeElement.LeftContent>
+                        <Image Source="../../Resources/Img/LeftMainContent/Animation_16x.png"/>
+                    </controls:EdgeElement.LeftContent>
+                </ListBoxItem>
                 <ListBoxItem Tag="{x:Static data:MessageToken.CirclePanelDemoCtl}" Content="{x:Static langs:Lang.CirclePanel}">
                     <controls:EdgeElement.LeftContent>
                         <Image Source="../../Resources/Img/LeftMainContent/ColorWheel_16x.png"/>