ThumbButtonInfo Class

ThumbButtonInfo Class

.NET Framework (current version)
 

Represents information about how to display a button in the Windows 7 taskbar thumbnail.

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

System.Object
  System.Windows.Threading.DispatcherObject
    System.Windows.DependencyObject
      System.Windows.Freezable
        System.Windows.Shell.ThumbButtonInfo

public sealed class ThumbButtonInfo : Freezable, ICommandSource

NameDescription
System_CAPS_pubmethodThumbButtonInfo()

Initializes a new instance of the ThumbButtonInfo class.

NameDescription
System_CAPS_pubpropertyCanFreeze

Gets a value that indicates whether the object can be made unmodifiable. (Inherited from Freezable.)

System_CAPS_pubpropertyCommand

Gets or sets the command to invoke when this thumbnail button is clicked.

System_CAPS_pubpropertyCommandParameter

Gets or sets the parameter to pass to the Command property.

System_CAPS_pubpropertyCommandTarget

Gets or sets the element on which to raise the specified command.

System_CAPS_pubpropertyDependencyObjectType

Gets the DependencyObjectType that wraps the CLR type of this instance. (Inherited from DependencyObject.)

System_CAPS_pubpropertyDescription

Gets or sets the text to display for the thumbnail button tooltip.

System_CAPS_pubpropertyDismissWhenClicked

Gets or sets a value that indicates whether the taskbar thumbnail closes when the thumbnail button is clicked.

System_CAPS_pubpropertyDispatcher

Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.)

System_CAPS_pubpropertyImageSource

Gets or sets the image that is displayed on the thumbnail button.

System_CAPS_pubpropertyIsBackgroundVisible

Gets or sets a value that indicates whether a border and highlight is displayed around the thumbnail button.

System_CAPS_pubpropertyIsEnabled

Gets or sets a value that indicates whether the thumbnail button is enabled.

System_CAPS_pubpropertyIsFrozen

Gets a value that indicates whether the object is currently modifiable. (Inherited from Freezable.)

System_CAPS_pubpropertyIsInteractive

Gets or sets a value that indicates whether the user can interact with the thumbnail button.

System_CAPS_pubpropertyIsSealed

Gets a value that indicates whether this instance is currently sealed (read-only).(Inherited from DependencyObject.)

System_CAPS_pubpropertyVisibility

Gets or sets a value that specifies the display state of the thumbnail button.

NameDescription
System_CAPS_pubmethodCheckAccess()

Determines whether the calling thread has access to this DispatcherObject.(Inherited from DispatcherObject.)

System_CAPS_pubmethodClearValue(DependencyProperty)

Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier. (Inherited from DependencyObject.)

System_CAPS_pubmethodClearValue(DependencyPropertyKey)

Clears the local value of a read-only property. The property to be cleared is specified by a DependencyPropertyKey. (Inherited from DependencyObject.)

System_CAPS_pubmethodClone()

Creates a modifiable clone of the Freezable, making deep copies of the object's values. When copying the object's dependency properties, this method copies expressions (which might no longer resolve) but not animations or their current values. (Inherited from Freezable.)

System_CAPS_pubmethodCloneCurrentValue()

Creates a modifiable clone (deep copy) of the Freezable using its current values.(Inherited from Freezable.)

System_CAPS_pubmethodCoerceValue(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.)

System_CAPS_pubmethodEquals(Object)

Determines whether a provided DependencyObject is equivalent to the current DependencyObject.(Inherited from DependencyObject.)

System_CAPS_pubmethodFreeze()

Makes the current object unmodifiable and sets its IsFrozen property to true. (Inherited from Freezable.)

System_CAPS_pubmethodGetAsFrozen()

Creates a frozen copy of the Freezable, using base (non-animated) property values. Because the copy is frozen, any frozen sub-objects are copied by reference. (Inherited from Freezable.)

System_CAPS_pubmethodGetCurrentValueAsFrozen()

Creates a frozen copy of the Freezable using current property values. Because the copy is frozen, any frozen sub-objects are copied by reference.(Inherited from Freezable.)

System_CAPS_pubmethodGetHashCode()

Gets a hash code for this DependencyObject.(Inherited from DependencyObject.)

System_CAPS_pubmethodGetLocalValueEnumerator()

Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject. (Inherited from DependencyObject.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodGetValue(DependencyProperty)

Returns the current effective value of a dependency property on this instance of a DependencyObject. (Inherited from DependencyObject.)

System_CAPS_pubmethodInvalidateProperty(DependencyProperty)

Re-evaluates the effective value for the specified dependency property(Inherited from DependencyObject.)

System_CAPS_pubmethodReadLocalValue(DependencyProperty)

Returns the local value of a dependency property, if it exists. (Inherited from DependencyObject.)

System_CAPS_pubmethodSetCurrentValue(DependencyProperty, Object)

Sets the value of a dependency property without changing its value source. (Inherited from DependencyObject.)

System_CAPS_pubmethodSetValue(DependencyProperty, Object)

Sets the local value of a dependency property, specified by its dependency property identifier. (Inherited from DependencyObject.)

System_CAPS_pubmethodSetValue(DependencyPropertyKey, Object)

Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property. (Inherited from DependencyObject.)

System_CAPS_protmethodShouldSerializeProperty(DependencyProperty)

Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property.(Inherited from DependencyObject.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubmethodVerifyAccess()

Enforces that the calling thread has access to this DispatcherObject.(Inherited from DispatcherObject.)

NameDescription
System_CAPS_pubfieldSystem_CAPS_staticCommandParameterProperty

Identifies the CommandParameter dependency property.

System_CAPS_pubfieldSystem_CAPS_staticCommandProperty

Identifies the Command dependency property.

System_CAPS_pubfieldSystem_CAPS_staticCommandTargetProperty

Identifies the CommandTarget dependency property.

System_CAPS_pubfieldSystem_CAPS_staticDescriptionProperty

Identifies the Description dependency property.

System_CAPS_pubfieldSystem_CAPS_staticDismissWhenClickedProperty

Identifies the DismissWhenClicked dependency property.

System_CAPS_pubfieldSystem_CAPS_staticImageSourceProperty

Identifies the ImageSource dependency property.

System_CAPS_pubfieldSystem_CAPS_staticIsBackgroundVisibleProperty

Identifies the IsBackgroundVisible dependency property.

System_CAPS_pubfieldSystem_CAPS_staticIsEnabledProperty

Identifies the IsEnabled dependency property.

System_CAPS_pubfieldSystem_CAPS_staticIsInteractiveProperty

Identifies the IsInteractive dependency property.

System_CAPS_pubfieldSystem_CAPS_staticVisibilityProperty

Identifies the Visibility dependency property.

NameDescription
System_CAPS_pubeventChanged

Occurs when the Freezable or an object it contains is modified. (Inherited from Freezable.)

System_CAPS_pubeventClick

Occurs when the thumbnail button is clicked.

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.

Taskbar Item Info Sample

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>

.NET Framework
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.

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