MenuGroup Class

Article
02/23/2011

Represents a group of menu items.

Inheritance Hierarchy

System.Object
Microsoft.Windows.Design.Interaction.MenuBase
Microsoft.Windows.Design.Interaction.MenuGroup

Namespace: Microsoft.Windows.Design.Interaction
Assembly: Microsoft.Windows.Design.Interaction (in Microsoft.Windows.Design.Interaction.dll)

Syntax

'Declaration
Public Class MenuGroup _
    Inherits MenuBase

public class MenuGroup : MenuBase

public ref class MenuGroup : public MenuBase

type MenuGroup =  
    class
        inherit MenuBase
    end

public class MenuGroup extends MenuBase

The MenuGroup type exposes the following members.

Constructors

	Name	Description
	MenuGroup(String)	Initializes a new instance of the MenuGroup class that has the specified group name.
	MenuGroup(String, String)	Initializes a new instance of the MenuGroup class that has the specified group name and display name.

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Properties

	Name	Description
	Context	Gets the current editing context. (Inherited from MenuBase.)
	DisplayName	Gets or sets the localized text to display for the menu item. (Inherited from MenuBase.)
	HasDropDown	Gets or sets a value indicating whether the menu items in the Items collection are added to a submenu.
	Items	Gets a list of menu items to display as siblings within the same menu group.
	Name	Gets or sets the unique identifier for the menu item. (Inherited from MenuBase.)

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Methods

	Name	Description
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnPropertyChanged	Raises the PropertyChanged event. (Inherited from MenuBase.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Events

	Name	Description
	PropertyChanged	Occurs when a property has changed. (Inherited from MenuBase.)

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Remarks

Menu items are represented by the MenuAction class. A menu group can have a collection of menu items directly on the menu or as a submenu, which is also called a flyout menu. Set the HasDropDown property to display menu items in a submenu.

To show context menu items, inherit from the PrimarySelectionContextMenuProvider class and create MenuAction items and an associated MenuGroup.

Examples

The following code example shows how to set up two MenuAction items and assign them to a MenuGroup. For more information, see Walkthrough: Creating a Menu Provider.

' The provider's constructor sets up the MenuAction objects 
' and the the MenuGroup which holds them.
Public Sub New()

    ' Set up the MenuAction which sets the control's 
    ' background to Blue.
    setBackgroundToBlueMenuAction = New MenuAction("Blue")
    setBackgroundToBlueMenuAction.Checkable = True
    AddHandler setBackgroundToBlueMenuAction.Execute, AddressOf SetBackgroundToBlue_Execute

    ' Set up the MenuAction which sets the control's 
    ' background to its default value.
    clearBackgroundMenuAction = New MenuAction("Cleared")
    clearBackgroundMenuAction.Checkable = True
    AddHandler clearBackgroundMenuAction.Execute, AddressOf ClearBackground_Execute

    ' Set up the MenuGroup which holds the MenuAction items.
    Dim backgroundFlyoutGroup As New MenuGroup("SetBackgroundsGroup", "Set Background")

    ' If HasDropDown is false, the group appears inline, 
    ' instead of as a flyout. Set to true.
    backgroundFlyoutGroup.HasDropDown = True
    backgroundFlyoutGroup.Items.Add(setBackgroundToBlueMenuAction)
    backgroundFlyoutGroup.Items.Add(clearBackgroundMenuAction)
    Me.Items.Add(backgroundFlyoutGroup)

    ' The UpdateItemStatus event is raised immediately before 
    ' this provider shows its tabs, which provides the opportunity 
    ' to set states.
    AddHandler UpdateItemStatus, AddressOf CustomContextMenuProvider_UpdateItemStatus

End Sub

// The provider's constructor sets up the MenuAction objects 
// and the the MenuGroup which holds them.
public CustomContextMenuProvider()
{   
    // Set up the MenuAction which sets the control's 
    // background to Blue.
    setBackgroundToBlueMenuAction = new MenuAction("Blue");
    setBackgroundToBlueMenuAction.Checkable = true;
    setBackgroundToBlueMenuAction.Execute += 
        new EventHandler<MenuActionEventArgs>(SetBackgroundToBlue_Execute);

    // Set up the MenuAction which sets the control's 
    // background to its default value.
    clearBackgroundMenuAction = new MenuAction("Cleared");
    clearBackgroundMenuAction.Checkable = true;
    clearBackgroundMenuAction.Execute += 
        new EventHandler<MenuActionEventArgs>(ClearBackground_Execute);

    // Set up the MenuGroup which holds the MenuAction items.
    MenuGroup backgroundFlyoutGroup = 
        new MenuGroup("SetBackgroundsGroup", "Set Background");

    // If HasDropDown is false, the group appears inline, 
    // instead of as a flyout. Set to true.
    backgroundFlyoutGroup.HasDropDown = true;
    backgroundFlyoutGroup.Items.Add(setBackgroundToBlueMenuAction);
    backgroundFlyoutGroup.Items.Add(clearBackgroundMenuAction);
    this.Items.Add(backgroundFlyoutGroup);

    // The UpdateItemStatus event is raised immediately before 
    // this provider shows its tabs, which provides the opportunity 
    // to set states.
    UpdateItemStatus += 
        new EventHandler<MenuActionEventArgs>(
            CustomContextMenuProvider_UpdateItemStatus);
}

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.

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