restricted ChildWindow in container. fixed bug with ChildWindow zindex, added a WindowState property to ChildWindow which will control opening and closing the window through data binding; two states WindowState.Open and WindowState.Closed. Added OverlayBrush and Overlay Opacity properties allow users to modify the ChldWindow's OverLay element.

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/ChildWindow/ChildWindow.cs

@@ -132,6 +132,13 @@ namespace Microsoft.Windows.Controls
             set { SetValue(IconSourceProperty, value); }
         }
 
+        public static readonly DependencyProperty IsModalProperty = DependencyProperty.Register("IsModal", typeof(bool), typeof(ChildWindow), new UIPropertyMetadata(true));
+        public bool IsModal
+        {
+            get { return (bool)GetValue(IsModalProperty); }
+            set { SetValue(IsModalProperty, value); }
+        }
+
         #region Left
 
         public static readonly DependencyProperty LeftProperty = DependencyProperty.Register("Left", typeof(double), typeof(ChildWindow), new PropertyMetadata(0.0, new PropertyChangedCallback(OnLeftPropertyChanged)));
@@ -143,53 +150,33 @@ namespace Microsoft.Windows.Controls
 
         private static void OnLeftPropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
         {
-            ChildWindow dialog = (ChildWindow)obj;
+            ChildWindow window = (ChildWindow)obj;
-            dialog.Left = dialog.GetRestrictedLeft();
+            window.Left = window.GetRestrictedLeft();
-            dialog.ProcessMove((double)e.NewValue - (double)e.OldValue, 0);
+            window.ProcessMove((double)e.NewValue - (double)e.OldValue, 0);
         }
 
         #endregion //Left
 
         #region OverlayBrush
 
-        public static readonly DependencyProperty OverlayBrushProperty = DependencyProperty.Register("OverlayBrush", typeof(Brush), typeof(ChildWindow), new PropertyMetadata(OnOverlayBrushPropertyChanged));
+        public static readonly DependencyProperty OverlayBrushProperty = DependencyProperty.Register("OverlayBrush", typeof(Brush), typeof(ChildWindow));
         public Brush OverlayBrush
         {
             get { return (Brush)GetValue(OverlayBrushProperty); }
             set { SetValue(OverlayBrushProperty, value); }
         }
 
-        private static void OnOverlayBrushPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-        {
-            ChildWindow cw = (ChildWindow)d;
-
-            if (cw.Overlay != null)
-            {
-                cw.Overlay.Background = (Brush)e.NewValue;
-            }
-        }
-
         #endregion //OverlayBrush
 
         #region OverlayOpacity
 
-        public static readonly DependencyProperty OverlayOpacityProperty = DependencyProperty.Register("OverlayOpacity", typeof(double), typeof(ChildWindow), new PropertyMetadata(OnOverlayOpacityPropertyChanged));
+        public static readonly DependencyProperty OverlayOpacityProperty = DependencyProperty.Register("OverlayOpacity", typeof(double), typeof(ChildWindow));
         public double OverlayOpacity
         {
             get { return (double)GetValue(OverlayOpacityProperty); }
             set { SetValue(OverlayOpacityProperty, value); }
         }
 
-        private static void OnOverlayOpacityPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-        {
-            ChildWindow cw = (ChildWindow)d;
-
-            if (cw.Overlay != null)
-            {
-                cw.Overlay.Opacity = (double)e.NewValue;
-            }
-        }
-
         #endregion //OverlayOpacity
 
         #region Top
@@ -203,9 +190,9 @@ namespace Microsoft.Windows.Controls
 
         private static void OnTopPropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
         {
-            ChildWindow dialog = (ChildWindow)obj;
+            ChildWindow window = (ChildWindow)obj;
-            dialog.Top = dialog.GetRestrictedTop();
+            window.Top = window.GetRestrictedTop();
-            dialog.ProcessMove(0, (double)e.NewValue - (double)e.OldValue);
+            window.ProcessMove(0, (double)e.NewValue - (double)e.OldValue);
         }
 
         #endregion //TopProperty
@@ -231,6 +218,23 @@ namespace Microsoft.Windows.Controls
             set { SetValue(WindowOpacityProperty, value); }
         }
 
+        #region WindowState
+
+        public static readonly DependencyProperty WindowStateProperty = DependencyProperty.Register("WindowState", typeof(WindowState), typeof(ChildWindow), new PropertyMetadata(WindowState.Closed, new PropertyChangedCallback(OnWindowStatePropertyChanged)));
+        public WindowState WindowState
+        {
+            get { return (WindowState)GetValue(WindowStateProperty); }
+            set { SetValue(WindowStateProperty, WindowState); }
+        }
+
+        private static void OnWindowStatePropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
+        {
+            ChildWindow window = (ChildWindow)obj;
+            window.SetWindowState((WindowState)e.NewValue);
+        }
+
+        #endregion //WindowState
+
         #endregion //Dependency Properties
 
         #endregion //Properties
@@ -317,6 +321,37 @@ namespace Microsoft.Windows.Controls
             return Top;
         }
 
+        private void SetWindowState(WindowState state)
+        {
+            switch (state)
+            {
+                case WindowState.Closed:
+                    {
+                        Visibility = System.Windows.Visibility.Hidden;
+                        break;
+                    }
+                case WindowState.Open:
+                    {
+                        Visibility = System.Windows.Visibility.Visible;
+                        SetZIndex();                        
+                        break;
+                    }
+            }
+        }
+
+        private void SetZIndex()
+        {
+            if (_parent != null)
+            {
+                int parentIndex = (int)_parent.GetValue(Canvas.ZIndexProperty);
+                this.SetValue(Canvas.ZIndexProperty, ++parentIndex);
+            }
+            else
+            {
+                this.SetValue(Canvas.ZIndexProperty, 1);
+            }
+        }
+
         private void SetStartupPosition()
         {
             CenterChildWindow();
@@ -349,13 +384,13 @@ namespace Microsoft.Windows.Controls
 
         public void Show()
         {
-            Visibility = System.Windows.Visibility.Visible;
+            SetWindowState(WindowState.Open);
         }
 
 
         public void Close()
         {
-            Visibility = System.Windows.Visibility.Hidden;
+            SetWindowState(WindowState.Closed);
         }
 
         #endregion //Public

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/ChildWindow/ChildWindow.xaml

@@ -79,23 +79,6 @@
                                         </ObjectAnimationUsingKeyFrames>
                                     </Storyboard>
                                 </VisualState>
-                                <VisualState x:Name="Disabled">
-                                    <Storyboard>
-                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="DisabledVisualElement" Storyboard.TargetProperty="Opacity">
-                                            <SplineDoubleKeyFrame KeyTime="0" Value=".55"/>
-                                        </DoubleAnimationUsingKeyFrames>
-                                    </Storyboard>
-                                </VisualState>
-                            </VisualStateGroup>
-                            <VisualStateGroup x:Name="FocusStates">
-                                <VisualState x:Name="Focused">
-                                    <Storyboard>
-                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Opacity">
-                                            <SplineDoubleKeyFrame KeyTime="0" Value="1"/>
-                                        </DoubleAnimationUsingKeyFrames>
-                                    </Storyboard>
-                                </VisualState>
-                                <VisualState x:Name="Unfocused"/>
                             </VisualStateGroup>
                         </VisualStateManager.VisualStateGroups>
                         <Border x:Name="Background" CornerRadius="0,0,2,0" Background="{StaticResource ChildWindowDarkBrush}">
@@ -135,7 +118,13 @@
             <Setter.Value>
                 <ControlTemplate TargetType="{x:Type local:ChildWindow}">
                     <Grid x:Name="Root">
-                        <Grid x:Name="PART_Overlay" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="0" RenderTransformOrigin="0.5,0.5" Background="{TemplateBinding OverlayBrush}" Opacity="{TemplateBinding OverlayOpacity}"/>
+                        <Grid.Resources>
+                            <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
+                        </Grid.Resources>
+                        <Grid x:Name="PART_Overlay" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="0" RenderTransformOrigin="0.5,0.5" 
+                              Background="{TemplateBinding OverlayBrush}" 
+                              Opacity="{TemplateBinding OverlayOpacity}"
+                              Visibility="{TemplateBinding IsModal, Converter={StaticResource BooleanToVisibilityConverter}}"/>
                         <Grid x:Name="PART_WindowRoot" HorizontalAlignment="Left" VerticalAlignment="Top">
                             <Grid.RenderTransform>
                                 <TransformGroup>
@@ -170,24 +159,8 @@
                                     <Border BorderBrush="#FFFFFFFF" BorderThickness="1" CornerRadius="1"/>
                                     <Border Margin="1"  BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="0.1" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}">
 
-                                        <Grid>
+                                        <ContentPresenter x:Name="Content"  Content="{TemplateBinding Content}" 
-                                            <Grid.RowDefinitions>
+                                                              ContentTemplate="{TemplateBinding ContentTemplate}" />
-                                                <RowDefinition />
-                                                <RowDefinition Height="Auto" />
-                                            </Grid.RowDefinitions>
-
-                                            <Grid>
-                                                <Grid.ColumnDefinitions>
-                                                    <ColumnDefinition Width="Auto"/>
-                                                    <ColumnDefinition Width="*"/>
-                                                </Grid.ColumnDefinitions>
-
-                                                <ContentPresenter x:Name="Content"  Content="{TemplateBinding Content}" 
-                                                              ContentTemplate="{TemplateBinding ContentTemplate}" 
-                                                              Cursor="{TemplateBinding Cursor}"/>
-
-                                            </Grid>
-                                        </Grid>
                                     </Border>
                                 </Grid>
 

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/ChildWindow/WindowState.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Microsoft.Windows.Controls
+{
+    public enum WindowState
+    {
+        Closed,
+        Open
+    }
+}

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Themes/Generic.xaml

@@ -499,23 +499,6 @@
                                         </ObjectAnimationUsingKeyFrames>
                                     </Storyboard>
                                 </VisualState>
-                                <VisualState x:Name="Disabled">
-                                    <Storyboard>
-                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="DisabledVisualElement" Storyboard.TargetProperty="Opacity">
-                                            <SplineDoubleKeyFrame KeyTime="0" Value=".55"/>
-                                        </DoubleAnimationUsingKeyFrames>
-                                    </Storyboard>
-                                </VisualState>
-                            </VisualStateGroup>
-                            <VisualStateGroup x:Name="FocusStates">
-                                <VisualState x:Name="Focused">
-                                    <Storyboard>
-                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Opacity">
-                                            <SplineDoubleKeyFrame KeyTime="0" Value="1"/>
-                                        </DoubleAnimationUsingKeyFrames>
-                                    </Storyboard>
-                                </VisualState>
-                                <VisualState x:Name="Unfocused"/>
                             </VisualStateGroup>
                         </VisualStateManager.VisualStateGroups>
                         <Border x:Name="Background" CornerRadius="0,0,2,0" Background="{StaticResource ChildWindowDarkBrush}">
@@ -555,7 +538,13 @@
             <Setter.Value>
                 <ControlTemplate TargetType="{x:Type local:ChildWindow}">
                     <Grid x:Name="Root">
-                        <Grid x:Name="PART_Overlay" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="0" RenderTransformOrigin="0.5,0.5" Background="{TemplateBinding OverlayBrush}" Opacity="{TemplateBinding OverlayOpacity}"/>
+                        <Grid.Resources>
+                            <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
+                        </Grid.Resources>
+                        <Grid x:Name="PART_Overlay" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="0" RenderTransformOrigin="0.5,0.5" 
+                              Background="{TemplateBinding OverlayBrush}" 
+                              Opacity="{TemplateBinding OverlayOpacity}"
+                              Visibility="{TemplateBinding IsModal, Converter={StaticResource BooleanToVisibilityConverter}}"/>
                         <Grid x:Name="PART_WindowRoot" HorizontalAlignment="Left" VerticalAlignment="Top">
                             <Grid.RenderTransform>
                                 <TransformGroup>
@@ -590,24 +579,8 @@
                                     <Border BorderBrush="#FFFFFFFF" BorderThickness="1" CornerRadius="1"/>
                                     <Border Margin="1"  BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="0.1" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}">
 
-                                        <Grid>
+                                        <ContentPresenter x:Name="Content"  Content="{TemplateBinding Content}" 
-                                            <Grid.RowDefinitions>
+                                                              ContentTemplate="{TemplateBinding ContentTemplate}" />
-                                                <RowDefinition />
-                                                <RowDefinition Height="Auto" />
-                                            </Grid.RowDefinitions>
-
-                                            <Grid>
-                                                <Grid.ColumnDefinitions>
-                                                    <ColumnDefinition Width="Auto"/>
-                                                    <ColumnDefinition Width="*"/>
-                                                </Grid.ColumnDefinitions>
-
-                                                <ContentPresenter x:Name="Content"  Content="{TemplateBinding Content}" 
-                                                              ContentTemplate="{TemplateBinding ContentTemplate}" 
-                                                              Cursor="{TemplateBinding Cursor}"/>
-
-                                            </Grid>
-                                        </Grid>
                                     </Border>
                                 </Grid>
 

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/WPFToolkit.Extended.csproj

@@ -73,6 +73,7 @@
   <ItemGroup>
     <Compile Include="BusyIndicator\BusyIndicator.cs" />
     <Compile Include="ChildWindow\ChildWindow.cs" />
+    <Compile Include="ChildWindow\WindowState.cs" />
     <Compile Include="MessageBox\MessageBox.cs" />
     <Compile Include="Properties\AssemblyInfo.cs">
       <SubType>Code</SubType>