VisualStateGroup Class

Contains mutually exclusive VisualState objects and VisualTransition objects that are used to go from one state to another.

Inheritance Hierarchy

System.Object
  System.Windows.DependencyObject
    System.Windows.VisualStateGroup

Namespace:  System.Windows
Assembly:  System.Windows (in System.Windows.dll)

Syntax

'Declaration
<ContentPropertyAttribute("States", True)> _
Public NotInheritable Class VisualStateGroup _
    Inherits DependencyObject
[ContentPropertyAttribute("States", true)]
public sealed class VisualStateGroup : DependencyObject
<VisualStateManager.VisualStateGroups>
   <VisualStateGroup ...>
</VisualStateManager.VisualStateGroups>

The VisualStateGroup type exposes the following members.

Constructors

  Name Description
Public methodSupported by Silverlight for Windows Phone VisualStateGroup Initializes a new instance of the VisualStateGroup class.

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Properties

  Name Description
Public propertySupported by Silverlight for Windows Phone CurrentState Gets the most recently set VisualState from a successful call to the GoToState method.
Public propertySupported by Silverlight for Windows Phone Dispatcher Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertySupported by Silverlight for Windows Phone Name Gets the name of the VisualStateGroup.
Public propertySupported by Silverlight for Windows Phone States Gets the collection of mutually exclusive VisualState objects.
Public propertySupported by Silverlight for Windows Phone Transitions Gets the collection of VisualTransition objects.

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Methods

  Name Description
Public methodSupported by Silverlight for Windows Phone CheckAccess Determines whether the calling thread has access to this object. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone ClearValue Clears the local value of a dependency property. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows Phone Finalize Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetAnimationBaseValue Returns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetType Gets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetValue Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
Protected methodSupported by Silverlight for Windows Phone MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone ReadLocalValue Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone SetValue Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone ToString Returns a string that represents the current object. (Inherited from Object.)

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Events

  Name Description
Public eventSupported by Silverlight for Windows Phone CurrentStateChanged Occurs after a control transitions into a different state.
Public eventSupported by Silverlight for Windows Phone CurrentStateChanging Occurs when a control begins transitioning into a different state.

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Remarks

ControlTemplate authors VisualState objects to a VisualStateGroup in a ControlTemplate to specify the visual behavior of the control. You put states that are mutually exclusive to each other in the same VisualStateGroup. For example, the CheckBox has two VisualStateGroup objects. One contains the states, Normal, MouseOver, Pressed, and Disabled. The other contains the states, Checked, UnChecked, and Indeterminate. The CheckBox can be in states MouseOver and UnChecked at the same time, but it cannot be in the MouseOver and Pressed states at the same time.

Control authors specify which states the control can be in by putting the TemplateVisualStateAttribute, on its class definition. States with the same TemplateVisualStateAttribute.GroupName belong in the same VisualStateGroup.

The Transitions property contains VisualTransition objects that are applied when the control transition between states that are defined in the VisualStateGroup.

For more information about using VisualStateGroup objects in a ControlTemplate, see Customizing the Appearance of an Existing Control by Using a ControlTemplate.

Examples

The following example creates a simple ControlTemplate for a Button that contains one Grid. It also contains a VisualStateGroup called CommonStates, which defines the MouseOver and Normal states. The VisualStateGroup also has a VisualTransition that specifies that it takes one half second for the Grid to change from green to red when the user puts the mouse over the Button.

Run this sample

<ControlTemplate TargetType="Button">
  <Grid >
    <VisualStateManager.VisualStateGroups>
      <VisualStateGroup x:Name="CommonStates">

        <VisualStateGroup.Transitions>

          <!--Take one half second to trasition to the MouseOver state.-->
          <VisualTransition To="MouseOver" 
                              GeneratedDuration="0:0:0.5"/>
        </VisualStateGroup.Transitions>

        <VisualState x:Name="Normal" />

        <!--Change the SolidColorBrush, ButtonBrush, to red when the
            mouse is over the button.-->
        <VisualState x:Name="MouseOver">
          <Storyboard>
            <ColorAnimation Storyboard.TargetName="ButtonBrush" 
                            Storyboard.TargetProperty="Color" To="Red" />
          </Storyboard>
        </VisualState>
      </VisualStateGroup>
    </VisualStateManager.VisualStateGroups>
    <Grid.Background>
      <SolidColorBrush x:Name="ButtonBrush" Color="Green"/>
    </Grid.Background>
  </Grid>
</ControlTemplate>

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See Also

Reference