ThumbButtonInfo Class
Represents information about how to display a button in the Windows 7 taskbar thumbnail.
Assembly: PresentationFramework (in PresentationFramework.dll)
System.Windows.Threading::DispatcherObject
System.Windows::DependencyObject
System.Windows::Freezable
System.Windows.Shell::ThumbButtonInfo
| Name | Description | |
|---|---|---|
![]() | ThumbButtonInfo() | Initializes a new instance of the ThumbButtonInfo class. |
| Name | Description | |
|---|---|---|
![]() | CanFreeze | Gets a value that indicates whether the object can be made unmodifiable. (Inherited from Freezable.) |
![]() | Command | Gets or sets the command to invoke when this thumbnail button is clicked. |
![]() | CommandParameter | Gets or sets the parameter to pass to the Command property. |
![]() | CommandTarget | Gets or sets the element on which to raise the specified command. |
![]() | DependencyObjectType | Gets the DependencyObjectType that wraps the CLR type of this instance. (Inherited from DependencyObject.) |
![]() | Description | Gets or sets the text to display for the thumbnail button tooltip. |
![]() | DismissWhenClicked | Gets or sets a value that indicates whether the taskbar thumbnail closes when the thumbnail button is clicked. |
![]() | Dispatcher | Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.) |
![]() | ImageSource | Gets or sets the image that is displayed on the thumbnail button. |
![]() | IsBackgroundVisible | Gets or sets a value that indicates whether a border and highlight is displayed around the thumbnail button. |
![]() | IsEnabled | Gets or sets a value that indicates whether the thumbnail button is enabled. |
![]() | IsFrozen | Gets a value that indicates whether the object is currently modifiable. (Inherited from Freezable.) |
![]() | IsInteractive | Gets or sets a value that indicates whether the user can interact with the thumbnail button. |
![]() | IsSealed | Gets a value that indicates whether this instance is currently sealed (read-only).(Inherited from DependencyObject.) |
![]() | Visibility | Gets or sets a value that specifies the display state of the thumbnail button. |
| Name | Description | |
|---|---|---|
![]() | CheckAccess() | Determines whether the calling thread has access to this DispatcherObject.(Inherited from DispatcherObject.) |
![]() | ClearValue(DependencyProperty^) | Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier. (Inherited from DependencyObject.) |
![]() | ClearValue(DependencyPropertyKey^) | Clears the local value of a read-only property. The property to be cleared is specified by a DependencyPropertyKey. (Inherited from DependencyObject.) |
![]() | Clone() | |
![]() | CloneCurrentValue() | |
![]() | CoerceValue(DependencyProperty^) | Coerces the value of the specified dependency property. This is accomplished by invoking any CoerceValueCallback function specified in property metadata for the dependency property as it exists on the calling DependencyObject.(Inherited from DependencyObject.) |
![]() | Equals(Object^) | Determines whether a provided DependencyObject is equivalent to the current DependencyObject.(Inherited from DependencyObject.) |
![]() | Freeze() | |
![]() | GetAsFrozen() | |
![]() | GetCurrentValueAsFrozen() | |
![]() | GetHashCode() | Gets a hash code for this DependencyObject.(Inherited from DependencyObject.) |
![]() | GetLocalValueEnumerator() | Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject. (Inherited from DependencyObject.) |
![]() | GetType() | |
![]() | GetValue(DependencyProperty^) | Returns the current effective value of a dependency property on this instance of a DependencyObject. (Inherited from DependencyObject.) |
![]() | InvalidateProperty(DependencyProperty^) | Re-evaluates the effective value for the specified dependency property(Inherited from DependencyObject.) |
![]() | ReadLocalValue(DependencyProperty^) | Returns the local value of a dependency property, if it exists. (Inherited from DependencyObject.) |
![]() | SetCurrentValue(DependencyProperty^, Object^) | Sets the value of a dependency property without changing its value source. (Inherited from DependencyObject.) |
![]() | SetValue(DependencyProperty^, Object^) | Sets the local value of a dependency property, specified by its dependency property identifier. (Inherited from DependencyObject.) |
![]() | SetValue(DependencyPropertyKey^, Object^) | Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property. (Inherited from DependencyObject.) |
![]() | ShouldSerializeProperty(DependencyProperty^) | Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property.(Inherited from DependencyObject.) |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
![]() | VerifyAccess() | Enforces that the calling thread has access to this DispatcherObject.(Inherited from DispatcherObject.) |
| Name | Description | |
|---|---|---|
![]() ![]() | CommandParameterProperty | Identifies the CommandParameter dependency property. |
![]() ![]() | CommandProperty | Identifies the Command dependency property. |
![]() ![]() | CommandTargetProperty | Identifies the CommandTarget dependency property. |
![]() ![]() | DescriptionProperty | Identifies the Description dependency property. |
![]() ![]() | DismissWhenClickedProperty | Identifies the DismissWhenClicked dependency property. |
![]() ![]() | ImageSourceProperty | Identifies the ImageSource dependency property. |
![]() ![]() | IsBackgroundVisibleProperty | Identifies the IsBackgroundVisible dependency property. |
![]() ![]() | IsEnabledProperty | Identifies the IsEnabled dependency property. |
![]() ![]() | IsInteractiveProperty | Identifies the IsInteractive dependency property. |
![]() ![]() | VisibilityProperty | Identifies the Visibility dependency property. |
The Windows 7 taskbar provides enhanced functionality that enables you to use the taskbar button to communicate status to a user and expose common tasks when the window is minimized or hidden. You can add buttons to the taskbar thumbnail to provide access to common tasks without switching to the application window. For example, Windows Media Player provides Play, Pause, Forward, and Back buttons that you can use to control media playback from the taskbar thumbnail when the application is minimized.
The ThumbButtonInfo class contains properties that describe how the Windows 7 shell displays the buttons in the taskbar thumbnail. It provides a managed wrapper around the native Windows API. ThumbButtonInfo objects are contained in the TaskbarItemInfo::ThumbButtonInfos collection.
The enhanced taskbar functionality is not available in versions of Windows earlier than Windows 7. In Windows 7, some functionality might not be available depending on the user's settings. For example, buttons are only shown in the taskbar thumbnail when Windows Aero is enabled. Your application should provide alternate ways of interacting with the user that are not dependent on the enhanced taskbar functionality.
The following illustration shows a taskbar preview with two thumb buttons that provide access to the Play and Stop commands.

Windows Taskbar Thumb Buttons
The following example shows how to create a ThumbButtonInfo in markup. The TaskbarItemInfo contains a collection of ThumbButtonInfo objects that provide access to the Play and Stop commands from the taskbar item. This example is part of a larger example provided for the TaskbarItemInfo class.
<Window.TaskbarItemInfo> <TaskbarItemInfo x:Name="taskBarItemInfo1" Overlay="{StaticResource ResourceKey=StopImage}" ThumbnailClipMargin="80,0,80,140" Description="Taskbar Item Info Sample"> <TaskbarItemInfo.ThumbButtonInfos> <ThumbButtonInfoCollection> <ThumbButtonInfo DismissWhenClicked="False" Command="MediaCommands.Play" CommandTarget="{Binding ElementName=btnPlay}" Description="Play" ImageSource="{StaticResource ResourceKey=PlayImage}"/> <ThumbButtonInfo DismissWhenClicked="True" Command="MediaCommands.Stop" CommandTarget="{Binding ElementName=btnStop}" Description="Stop" ImageSource="{StaticResource ResourceKey=StopImage}"/> </ThumbButtonInfoCollection> </TaskbarItemInfo.ThumbButtonInfos> </TaskbarItemInfo> </Window.TaskbarItemInfo>
Available since 4.0
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.





