silverlight: How to use expander control with 2 stack panels? - silverlight

Question

I want to create structure as ilustrated below, it should contain 2 stack panels:
one horizontal (HPanel)
one vertical (VPanel)
the expander should be at the right of HPanel , when the expander is clicked both panels should get collapased & vice versa
HPanel -> Expander
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Answer 1

To get the button on the right, you're going to have to re-template the expander. Here is the full xaml you'll need:
<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit"
x:Class="StackOverflowExpander.MainPage"
mc:Ignorable="d"
d:DesignHeight="100"
d:DesignWidth="200">
<UserControl.Resources>
<Style x:Key="ExpanderBottomRightButtonStyle" TargetType="toolkit:Expander">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="toolkit:Expander">
<Grid Background="Transparent">
<Grid.Resources>
<LinearGradientBrush x:Key="ExpanderArrowFill" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="#FFBFBFBF" Offset="0.5"/>
<GradientStop Color="#FF878787" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="ExpanderArrowHoverFill" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF0F8FE" Offset="0"/>
<GradientStop Color="#FFE0F3FE" Offset="0.3"/>
<GradientStop Color="#FF6FA7C5" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="ExpanderArrowPressedFill" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFDCF0FA" Offset="0"/>
<GradientStop Color="#FFC5E6F7" Offset="0.2"/>
<GradientStop Color="#FF5690D0" Offset="1"/>
</LinearGradientBrush>
<ControlTemplate x:Key="ExpanderDownHeaderTemplate" TargetType="ToggleButton">
<Grid Background="Transparent">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CheckStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="00:00:00"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="Checked">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="arrow" Storyboard.TargetProperty="Data">
<DiscreteObjectKeyFrame KeyTime="0" Value="M 1,4.5 L 4.5,1 L 8,4.5"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unchecked"/>
</VisualStateGroup>
<VisualStateGroup x:Name="CommonStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0"/>
<VisualTransition GeneratedDuration="00:00:00.1" To="MouseOver"/>
<VisualTransition GeneratedDuration="00:00:00.1" To="Pressed"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="Normal"/>
<VisualState x:Name="MouseOver">
<Storyboard>
<ColorAnimation BeginTime="0" Storyboard.TargetName="circle" Storyboard.TargetProperty="(Ellipse.Stroke).(SolidColorBrush.Color)" To="#FF3C7FB1"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="circle" Storyboard.TargetProperty="(Ellipse.Fill)">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ExpanderArrowHoverFill}"/>
</ObjectAnimationUsingKeyFrames>
<ColorAnimation BeginTime="0" Storyboard.TargetName="arrow" Storyboard.TargetProperty="(Path.Stroke).(SolidColorBrush.Color)" To="#222"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ColorAnimation BeginTime="0" Storyboard.TargetName="circle" Storyboard.TargetProperty="(Ellipse.Stroke).(SolidColorBrush.Color)" To="#FF526C7B"/>
<DoubleAnimation BeginTime="0" Storyboard.TargetName="circle" Storyboard.TargetProperty="StrokeThickness" To="1.5"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="circle" Storyboard.TargetProperty="(Ellipse.Fill)">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ExpanderArrowPressedFill}"/>
</ObjectAnimationUsingKeyFrames>
<ColorAnimation BeginTime="0" Storyboard.TargetName="arrow" Storyboard.TargetProperty="(Path.Stroke).(SolidColorBrush.Color)" To="#FF003366"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border Padding="{TemplateBinding Padding}">
<Grid Background="Transparent">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="19"/>
</Grid.ColumnDefinitions>
<Grid Grid.Column="1" HorizontalAlignment="Left" VerticalAlignment="Top">
<Ellipse Fill="{StaticResource ExpanderArrowFill}" Height="19" HorizontalAlignment="Center" x:Name="circle" Stroke="DarkGray" VerticalAlignment="Center" Width="19"/>
<Path Data="M 1,1.5 L 4.5,5 L 8,1.5" HorizontalAlignment="Center" x:Name="arrow" Stroke="#666" StrokeThickness="2" VerticalAlignment="Center"/>
</Grid>
<ContentPresenter Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}" HorizontalAlignment="Left" Margin="4,0,0,0" x:Name="header" VerticalAlignment="Center"/>
</Grid>
</Border>
<Rectangle IsHitTestVisible="false" x:Name="FocusVisualElement" Stroke="Green" StrokeDashArray="1 2" StrokeThickness="1" Visibility="Collapsed"/>
</Grid>
</ControlTemplate>
</Grid.Resources>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="Normal"/>
<VisualState x:Name="Disabled">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="DisabledVisualElement" Storyboard.TargetProperty="(UIElement.Opacity)" To="1"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused"/>
</VisualStateGroup>
<VisualStateGroup x:Name="ExpansionStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="Collapsed"/>
<VisualState x:Name="Expanded">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpandSite" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="ExpandDirectionStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="ExpandDown">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="rd1" Storyboard.TargetProperty="Height">
<DiscreteObjectKeyFrame KeyTime="0" Value="*"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="cd0" Storyboard.TargetProperty="Width">
<DiscreteObjectKeyFrame KeyTime="0" Value="*"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="ExpandUp">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpanderButton" Storyboard.TargetProperty="Template">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ExpanderUpHeaderTemplate}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpanderButton" Storyboard.TargetProperty="(Grid.Row)">
<DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpandSite" Storyboard.TargetProperty="(Grid.Row)">
<DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="rd0" Storyboard.TargetProperty="Height">
<DiscreteObjectKeyFrame KeyTime="0" Value="*"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="cd0" Storyboard.TargetProperty="Width">
<DiscreteObjectKeyFrame KeyTime="0" Value="*"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="ExpandLeft">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpanderButton" Storyboard.TargetProperty="Template">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ExpanderLeftHeaderTemplate}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpanderButton" Storyboard.TargetProperty="(Grid.Column)">
<DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpandSite" Storyboard.TargetProperty="(Grid.Row)">
<DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="rd0" Storyboard.TargetProperty="Height">
<DiscreteObjectKeyFrame KeyTime="0" Value="*"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="cd0" Storyboard.TargetProperty="Width">
<DiscreteObjectKeyFrame KeyTime="0" Value="*"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="ExpandRight">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ExpanderButton" Storyboard.TargetProperty="Template">
<DiscreteObjectKeyFrame KeyTime="00:00:00.1000000" Value="{StaticResource ExpanderLeftHeaderTemplate}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpandSite" Storyboard.TargetProperty="(Grid.Row)">
<DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="ExpandSite" Storyboard.TargetProperty="(Grid.Column)">
<DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="rd0" Storyboard.TargetProperty="Height">
<DiscreteObjectKeyFrame KeyTime="0" Value="*"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="cd1" Storyboard.TargetProperty="Width">
<DiscreteObjectKeyFrame KeyTime="0" Value="*"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="Background" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="3">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" x:Name="rd0"/>
<RowDefinition Height="Auto" x:Name="rd1"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" x:Name="cd0"/>
<ColumnDefinition Width="Auto" x:Name="cd1"/>
</Grid.ColumnDefinitions>
<ToggleButton Content="{TemplateBinding Header}" ContentTemplate="{TemplateBinding HeaderTemplate}" FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}" FontStretch="{TemplateBinding FontStretch}" FontStyle="{TemplateBinding FontStyle}" FontWeight="{TemplateBinding FontWeight}" Foreground="{TemplateBinding Foreground}" Grid.Column="0" Grid.Row="0" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsChecked="{TemplateBinding IsExpanded}" Margin="1" MinHeight="0" MinWidth="0" x:Name="ExpanderButton" Padding="{TemplateBinding Padding}" Template="{StaticResource ExpanderDownHeaderTemplate}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
<ContentControl Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}" FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}" FontStretch="{TemplateBinding FontStretch}" FontStyle="{TemplateBinding FontStyle}" FontWeight="{TemplateBinding FontWeight}" Foreground="{TemplateBinding Foreground}" Grid.Column="0" Grid.Row="1" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" x:Name="ExpandSite" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Visibility="Collapsed"/>
</Grid>
</Border>
<Border x:Name="DisabledVisualElement" IsHitTestVisible="false" Opacity="0" Background="#A5FFFFFF" CornerRadius="3"/>
<Border x:Name="FocusVisualElement" IsHitTestVisible="false" Visibility="Collapsed" BorderThickness="1" CornerRadius="3">
<Border.BorderBrush>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFA3AEB9"/>
<GradientStop Color="#FF8399A9" Offset="0.375"/>
<GradientStop Color="#FF718597" Offset="0.375"/>
<GradientStop Color="#FF617584" Offset="1"/>
</LinearGradientBrush>
</Border.BorderBrush>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</UserControl.Resources>
<Grid x:Name="LayoutRoot"
Background="White">
<toolkit:Expander Style="{StaticResource ExpanderBottomRightButtonStyle}">
<toolkit:Expander.Header>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Horizontal1 "/>
<TextBlock Text="Horizontal2 "/>
</StackPanel>
</toolkit:Expander.Header>
<StackPanel Orientation="Vertical">
<TextBlock Text="Vertical1"/>
<TextBlock Text="Vertical2"/>
<TextBlock Text="Vertical3"/>
</StackPanel>
</toolkit:Expander>
</Grid>
This will produce a control that looks like this:
If you can live with the button on the left, then the solution becomes alot easier:
<toolkit:Expander>
<toolkit:Expander.Header>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Horizontal1 "/>
<TextBlock Text="Horizontal2 "/>
</StackPanel>
</toolkit:Expander.Header>
<StackPanel Orientation="Vertical">
<TextBlock Text="Vertical1"/>
<TextBlock Text="Vertical2"/>
<TextBlock Text="Vertical3"/>
</StackPanel>
</toolkit:Expander>
which produces this: