Develop Reference

WPF / XAML VisualStateManager Who handles event?

In my CustomControl I am using a VisualStateManager like this:
...
<ControlTemplate TargetType="{x:Type local:MyCustomControl}">
<Grid x:Name="rootGrid" >
<Grid.RowDefinitions>
<RowDefinition Height="65"></RowDefinition>
<RowDefinition Height="*"></RowDefinition>
</Grid.RowDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CheckStates">
<VisualState x:Name="Checked">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="toggleRegionContent"
Storyboard.TargetProperty="Height"
From="0"
To="{TemplateBinding ContentHeight}"
Duration="0:0:.7" />
<DoubleAnimation Storyboard.TargetName="arrowIcon"
Storyboard.TargetProperty="(Path.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)"
From="0"
To="180"
Duration="0:0:.1" />
</Storyboard>
<VisualState>
<!-- Some other States -->
</VisualStateGroup>
</VisualStateManager>
<ToggleButton>
<!-- The Rest of the Control -->
My Question now is how the Event Checked is handled or who handles it. Does the VisualStateManager automatically Switch the State when the ToggleButton is clicked. Or do i have to give my ToggleButton a Checked Event and assign the State of the Button in the Code Behind with something like this:
VisualStateManager.GoToElementState(Control, "Checked", true);
Thanks for your help.

Or do i have to give my ToggleButton a Checked Event and assign the State of the Button in the Code Behind with something like this:
Yes, your custom control is responsible for setting the current visual state of the control using the VisualStateManager class and its GoToState method.
You can read more about this on MSDN: https://msdn.microsoft.com/en-us/library/ee330302(v=vs.110).aspx

You'll have to switch the state by using either the GoToStateAction behavior or the DataStateBehavior.
The DataStateBehavior is nice if you're only switching between 2 states.
The GoToStateAction is nice if you want to switch between multiple states.
First, here is a very simple example using the DataStateBehavior. I switch the color of the rectangle on a checkbox click.
<Grid>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="MyStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.3"
To="Checked">
<VisualTransition.GeneratedEasingFunction>
<CubicEase EasingMode="EaseInOut" />
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
<VisualTransition GeneratedDuration="0:0:0.3"
To="Unchecked">
<VisualTransition.GeneratedEasingFunction>
<CubicEase EasingMode="EaseInOut" />
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
</VisualStateGroup.Transitions>
<VisualState x:Name="Checked">
<Storyboard>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"
Storyboard.TargetName="myRect">
<EasingColorKeyFrame KeyTime="0"
Value="#FF6F6FFF" />
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unchecked" />
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<i:Interaction.Behaviors>
<ei:DataStateBehavior Binding="{Binding IsChecked, ElementName=myCheckBox}"
Value="True"
TrueState="Checked"
FalseState="Unchecked" />
</i:Interaction.Behaviors>
<Rectangle x:Name="myRect"
Fill="#FFF4F4F5"
HorizontalAlignment="Left"
Margin="43.166,74.07,0,153.968"
Stroke="Black"
Width="104.438" />
<CheckBox x:Name="myCheckBox"
Content="CheckBox"
Height="20.776"
Margin="239.69,88.668,192.524,0"
VerticalAlignment="Top" />
</Grid>
And here is an example using GoToStateAction. Again i'm just changing the rectangle color based on a checkbox being checked.
<Grid>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="MyStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.3"
To="Checked">
<VisualTransition.GeneratedEasingFunction>
<CubicEase EasingMode="EaseInOut" />
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
<VisualTransition GeneratedDuration="0:0:0.3"
To="Unchecked">
<VisualTransition.GeneratedEasingFunction>
<CubicEase EasingMode="EaseInOut" />
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
</VisualStateGroup.Transitions>
<VisualState x:Name="Checked">
<Storyboard>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"
Storyboard.TargetName="myRect">
<EasingColorKeyFrame KeyTime="0"
Value="#FF6F6FFF" />
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unchecked" />
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Rectangle x:Name="myRect"
Fill="#FFF4F4F5"
HorizontalAlignment="Left"
Margin="43.166,74.07,0,153.968"
Stroke="Black"
Width="104.438" />
<CheckBox x:Name="myCheckBox"
Content="CheckBox"
Height="20.776"
Margin="239.69,88.668,192.524,0"
VerticalAlignment="Top">
<i:Interaction.Triggers>
<ei:DataTrigger Binding="{Binding IsChecked, ElementName=myCheckBox}"
Value="True">
<ei:GoToStateAction StateName="Checked" />
</ei:DataTrigger>
<ei:DataTrigger Binding="{Binding IsChecked, ElementName=myCheckBox}"
Value="False">
<ei:GoToStateAction StateName="Unchecked" />
</ei:DataTrigger>
</i:Interaction.Triggers>
</CheckBox>
</Grid>
EDIT:
Ensure you add a reference to the Blend SDK for the above methods to work.
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"

How to add GroupName to ControlTemplate for RadioButton

I have a Style defined for a RadioButton which includes a ControlTemplate made up of BulletDecorator, VisualStateManager and Triggers. I currently have my GroupName defined on the RadioButton in the XAML code.
The selection of a radio button when running the code is not mutually exclusive.
I have read other posts saying that the problem is a second RadioButton defined in the ControlTemplate. I do not have a second RadioButton defined.
Here is a picture of buttons selected which should be mutually exclusive:
Here is my style:
<Style x:Key="RadioButtonStyle" TargetType="RadioButton">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Height" Value="15"/>
<Setter Property="Margin" Value="5"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="RadioButton">
<BulletDecorator>
<BulletDecorator.Bullet>
<Grid Height="{TemplateBinding Height}" Width="{Binding RelativeSource={RelativeSource Self}, Path=Height, UpdateSourceTrigger=PropertyChanged}" MinHeight="15" MinWidth="15">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="3*"/>
<ColumnDefinition Width="1*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="1*"/>
<RowDefinition Height="3*"/>
<RowDefinition Height="1*"/>
</Grid.RowDefinitions>
<Ellipse Name="EllipseMain"
Grid.Column="0" Grid.ColumnSpan="3"
Grid.Row="0" Grid.RowSpan="3"
Fill="Transparent"
StrokeThickness="{TemplateBinding BorderThickness}"
Stroke="DimGray"/>
<Ellipse Name="CheckMark"
Grid.Column="1"
Grid.Row="1"
Opacity="0"
Fill="#029cc7"/>
</Grid>
</BulletDecorator.Bullet>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Disabled">
<Storyboard>
<ColorAnimation Storyboard.TargetName="CheckMark" Storyboard.TargetProperty="(Ellipse.Fill).(SolidColorBrush.Color)" To="LightGray" Duration="0:0:0.3"/>
<ColorAnimation Storyboard.TargetName="CheckMain" Storyboard.TargetProperty="(Ellipse.Stroke).(SolidColorBrush.Color)" To="LightGray" Duration="0:0:0.3"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="CheckStates">
<VisualState x:Name="Checked">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="CheckMark" Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:0.3"/>
</Storyboard>
</VisualState>
<VisualState x:Name="UnChecked">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="CheckMark" Storyboard.TargetProperty="Opacity" To="0" Duration="0:0:0.3"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Indeterminate">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="CheckMark" Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:0.3"/>
<ColorAnimation Storyboard.TargetName="CheckMain" Storyboard.TargetProperty="(Ellipse.Fill).(SolidColorBrush.Color)" To="Gray" Duration="0:0:0.3"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ContentPresenter Margin="4,0,0,0" HorizontalAlignment="Left" VerticalAlignment="Center" RecognizesAccessKey="True"/>
</BulletDecorator>
<ControlTemplate.Triggers>
<Trigger Property="IsPressed" Value="True">
<Setter TargetName="EllipseMain" Property="Fill" Value="#55029cc7"/>
</Trigger>
<Trigger Property="IsFocused" Value="True">
<Setter TargetName="EllipseMain" Property="Stroke" Value="#88029cc7"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Here is the XAML:
<RadioButton Grid.Row="0" Grid.Column="0" Content="Normal" Foreground="WhiteSmoke" Style="{StaticResource RadioButtonStyle}" GroupName="gpHeadingMode" Margin="0,0,0,0"/>
<RadioButton Grid.Row="1" Grid.Column="0" Content="Weather Vane" Foreground="WhiteSmoke" Style="{StaticResource RadioButtonStyle}" GroupName="gpHeadingMode" Margin="0,0,0,0"/>
Tried this as a work around (in XAML):
<RadioButton Grid.Row="0" Grid.Column="0" x:Name="Normal" Content="Normal" Foreground="WhiteSmoke" GroupName="gpHeadingMode1"
Style="{StaticResource RadioButtonStyle}"
IsChecked="{Binding HeadingModeChecked, ElementName=HeadingDialog, Converter={StaticResource RbCheckedConverter}, ConverterParameter=Normal, FallbackValue=False}"
Click="RbHeadingMode_Click"/>
<RadioButton Grid.Row="1" Grid.Column="0" x:Name="WeatherVane" Content="Weather Vane" Foreground="WhiteSmoke" GroupName="gpHeadingMode2"
Style="{StaticResource RadioButtonStyle}"
IsChecked="{Binding HeadingModeChecked, ElementName=HeadingDialog, Converter={StaticResource RbCheckedConverter}, ConverterParameter=WeatherVane, FallbackValue=False}"
Click="RbHeadingMode_Click"/>
In RbHeadingMode_Click, the dependency object HeadingModeChecked is set with the value of RadioButton.Name. If I remove the "Style" the converter fires and does the job of toggling the IsClicked value.
Unfortunately, with the Style, the converter does not fire.
Now the question becomes, how can I bind the IsChecked property in XAML to the Style?
Note: Actually, the converter does fire with Style specified but the change to IsChecked in XAML has no effect on the RadioButton.

Had to remove the following code from the Style and it works:
<VisualStateGroup x:Name="CheckStates">
<VisualState x:Name="Checked">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="CheckMark" Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:0.3"/>
</Storyboard>
</VisualState>
<VisualState x:Name="UnChecked">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="CheckMark" Storyboard.TargetProperty="Opacity" To="0" Duration="0:0:0.3"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Indeterminate">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="CheckMark" Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:0.3"/>
<ColorAnimation Storyboard.TargetName="CheckMain" Storyboard.TargetProperty="(Ellipse.Fill).(SolidColorBrush.Color)" To="Gray" Duration="0:0:0.3"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
Note: Not only does the converter work on the IsChecked property but now I can remove that converter and just use Groupname to achieve mutual exclusion on the radiobuttons!

How to change the border around a LoopingSelector

I've been messing around trying to change this red border around the LoopingSelector in code, and in Blend. I just can't figure out how to do it. Here's a picture so you have an idea of what I'm talking about.
<Grid Grid.Row="1" Margin="12,0,12,0" toolkit:TurnstileFeatherEffect.FeatheringIndex="1">
<Grid.Resources>
<DataTemplate x:Key="KiloTemplate">
<Grid Background="DarkBlue">
<TextBlock Text="{Binding}" FontSize="54" FontFamily="{StaticResource PhoneFontFamilySemiBold}" HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBlock Text="kg" FontSize="24" HorizontalAlignment="Right" VerticalAlignment="Bottom" />
</Grid>
</DataTemplate>
</Grid.Resources>
<toolkitPrimitives:LoopingSelector x:Name="loopingSelectorStarost" Margin="12" Width="128" ItemSize="128,128" ItemTemplate="{StaticResource StarostTemplate}" ManipulationStarted="loopingSelector_ManipulationStarted">
<toolkitPrimitives:LoopingSelector.DataSource>
<local:NumberDataSource Privzeti="18" Minimum="13" Maximum="99" />
</toolkitPrimitives:LoopingSelector.DataSource>
</toolkitPrimitives:LoopingSelector>
</Grid>
EDIT: Here's the soulution, thanks to Chris. W. I copied the style from the Generic.xaml file in the Phone Toolkit samples. I changed the <DiscreteObjectKeyFrame KeyTime="0" Value="Transparent" /> in the Selected Visual State. Here's the code:
<Style TargetType="toolkitPrimitives:LoopingSelectorItem">
<Setter Property="Foreground" Value="{StaticResource PhoneSubtleBrush}"/>
<Setter Property="Padding" Value="6"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Border x:Name="root" CacheMode="BitmapCache" Background="Transparent" Padding="{TemplateBinding Padding}">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualStateGroup.Transitions>
<VisualTransition From="Normal" To="Expanded" GeneratedDuration="0:0:0.33" />
<VisualTransition From="Expanded" To="Normal" GeneratedDuration="0:0:0.33" />
</VisualStateGroup.Transitions>
<VisualState x:Name="Normal" />
<VisualState x:Name="Expanded">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="border" Storyboard.TargetProperty="Opacity" To="0.8" Duration="0"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="background" Storyboard.TargetProperty="Opacity" To="1" Duration="0"/>
<DoubleAnimation Storyboard.TargetName="border" Storyboard.TargetProperty="Opacity" To="1" Duration="0"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="border" Storyboard.TargetProperty="BorderBrush" Duration="0">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="0" Value="DarkGray" />
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="contentControl" Storyboard.TargetProperty="Foreground" Duration="0">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="0" Value="White" />
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border.RenderTransform>
<TranslateTransform x:Name="Transform"/>
</Border.RenderTransform>
<Grid>
<Rectangle x:Name="background" Margin="0" Opacity="0" Fill="{StaticResource PhoneAccentBrush}" CacheMode="BitmapCache"/>
<Border x:Name="border" Opacity="0" BorderThickness="3" BorderBrush="{StaticResource PhoneSubtleBrush}">
<ContentControl x:Name="contentControl" HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch" VerticalAlignment="Stretch" VerticalContentAlignment="Stretch">
<ContentPresenter x:Name="contentPresenter" CacheMode="BitmapCache"/>
</ContentControl>
</Border>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

Start by finding the template for it, a quick solution search for TargetType="primitives:LoopingSelectorItem" should expose it pretty quick or you could likely get to it in Blend.
Once you have the template you'll just locate the Border or Rectangle object in the template that's causing that border.
However that may not even be necessary if the property is bound to the template already. Can you set something like BorderBrush directly to it? I'd have to load something up to look so I'm just guessing at this point.
Hope this helps.

Animated Expander - Animates in only one direction

Can anyone tell me what might be wrong with this template. the expander only animates when expanding, not collapsing.
<ControlTemplate x:Key="ExpanderExTemplate" TargetType="{x:Type Expander}" >
<StackPanel Margin="0">
<Border BorderThickness="1" >
<Expander Name="expanderEx" Header="{TemplateBinding Header}" IsExpanded="{TemplateBinding IsExpanded}" BorderThickness="0">
<Border BorderThickness="0" >
<ContentPresenter x:Name="ExpandSite" Margin="5,5,5,5" >
<ContentPresenter.LayoutTransform>
<ScaleTransform x:Name="scaleTransform" ScaleX="1" ScaleY="1" />
</ContentPresenter.LayoutTransform>
</ContentPresenter>
</Border>
<Expander.Triggers>
<EventTrigger RoutedEvent="Expander.Expanded">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard >
<DoubleAnimation From="0" To="1" Duration="0:0:0.25"
Storyboard.TargetName="ExpandSite"
Storyboard.TargetProperty="(FrameworkElement.LayoutTransform).(ScaleTransform.ScaleY)" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="Expander.Collapsed">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation From="1" To="0" Duration="0:0:0.25"
Storyboard.TargetName="ExpandSite"
Storyboard.TargetProperty="(FrameworkElement.LayoutTransform).(ScaleTransform.ScaleY)" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Expander.Triggers>
</Expander>
</Border>
</StackPanel>
</ControlTemplate>

Using Button resources for different hover states

I'm creating a button using a spritesheet in xaml by repositioning the translateX and translateY values of the button.
What I would like to do is change the translateX and translateY value on the state change, I'm sure this is possible in xaml but under blend it would allow me to change those x and y values as it says they are computed values (i don't want those values tweening, just changing upon hover)
Here's the example of the current single state button.
<Button Content="test" HorizontalAlignment="Center" Height="57" VerticalAlignment="Center" Width="294" d:LayoutOverrides="VerticalAlignment">
<Button.Resources>
<Style x:Key="ButtonStyle1" TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid>
<Rectangle x:Name="R" Opacity="1" StrokeThickness="0" Visibility="Visible">
<Rectangle.Fill>
<ImageBrush ImageSource="/Project;component/wp7_buttons.png" Stretch="None" AlignmentX="Left" AlignmentY="Top" >
<ImageBrush.Transform>
<CompositeTransform TranslateX="-558" TranslateY="0"/>
</ImageBrush.Transform>
</ImageBrush>
</Rectangle.Fill>
</Rectangle>
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Button.Resources>
<Button.Style>
<StaticResource ResourceKey="ButtonStyle1"/>
</Button.Style>
</Button>
How do I do this? I need to be able to bind each state to a property which will include the x and y translate values and also the ImageSource.

you have to work with VisualStates like below
in blend you cand edit a button template copy and you will see all its VisualStates.
so you just have to change Storyboard.TargetName and Storyboard.TargetProperty to match with your ImageBrush CompositeTransform :)
<ControlTemplate TargetType="Button">
<Grid x:Name="Root">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.1" />
<VisualTransition To="Pressed" />
<VisualTransition From="Pressed" />
</VisualStateGroup.Transitions>
<VisualState x:Name="Normal" />
<VisualState x:Name="MouseOver">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="PressedElement" Storyboard.TargetProperty="(FrameworkElement.Opacity)" To="0" />
<DoubleAnimation Duration="0" Storyboard.TargetName="MouseOverElement" Storyboard.TargetProperty="(FrameworkElement.Opacity)" To="1" />
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="NormalElement" Storyboard.TargetProperty="(FrameworkElement.Opacity)" To="0.25" />
<DoubleAnimation Duration="0" Storyboard.TargetName="PressedElement" Storyboard.TargetProperty="(FrameworkElement.Opacity)" To="1" />