modify growlparent‘s initialization mode

HandyControl/Controls/Growl.cs

@@ -121,6 +121,19 @@ namespace HandyControl.Controls
         public static readonly DependencyProperty TypeProperty = DependencyProperty.Register(
             "Type", typeof(InfoType), typeof(Growl), new PropertyMetadata(default(InfoType)));
 
+        public static readonly DependencyProperty GrowlParentProperty = DependencyProperty.RegisterAttached(
+            "GrowlParent", typeof(bool), typeof(Growl), new PropertyMetadata(default(bool), (o, args) =>
+            {
+                if (o is Panel panel)
+                {
+                    SetGrowlPanel(panel);
+                }
+            }));
+
+        public static void SetGrowlParent(DependencyObject element, bool value) => element.SetValue(GrowlParentProperty, value);
+
+        public static bool GetGrowlParent(DependencyObject element) => (bool) element.GetValue(GrowlParentProperty);
+
         public InfoType Type
         {
             get => (InfoType) GetValue(TypeProperty);
@@ -196,7 +209,7 @@ namespace HandyControl.Controls
         ///     消息容器
         /// </summary>
         /// <param name="panel"></param>
-        public static void SetGrowlPanel(Panel panel)
+        private static void SetGrowlPanel(Panel panel)
         {
             GrowlPanel = panel;
             var menuItem = new MenuItem

HandyControlDemo/MainWindow.xaml

@@ -30,7 +30,7 @@
         <userControl:MainContent Grid.Column="1"/>
         <GridSplitter Grid.Column="1" HorizontalAlignment="Left" Width="4" Background="Transparent" BorderThickness="1,0,0,0" BorderBrush="{DynamicResource BorderBrush}"/>
         <controls:ScrollViewer Grid.Column="1" VerticalScrollBarVisibility="Hidden" HorizontalAlignment="Right" IsEnableInertia="True" IsPenetrating="True">
-            <StackPanel IsHitTestVisible="True" VerticalAlignment="Top" Background="Transparent" Name="PanelMessage" Margin="0,10,10,10"/>
+            <StackPanel controls:Growl.GrowlParent="True" VerticalAlignment="Top" Margin="0,10,10,10"/>
         </controls:ScrollViewer>
     </Grid>
 </controls:WindowBorderless>

HandyControlDemo/MainWindow.xaml.cs

@@ -1,18 +1,10 @@
-using HandyControl.Controls;
-
-namespace HandyControlDemo
+namespace HandyControlDemo
 {
-    /// <summary>
-    /// MainWindow.xaml 的交互逻辑
-    /// </summary>
     public partial class MainWindow
     {
         public MainWindow()
         {
-
             InitializeComponent();
-
-            Growl.SetGrowlPanel(PanelMessage);
         }
     }
 }