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MenuGroup Class

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
Public method MenuGroup(String) Initializes a new instance of the MenuGroup class that has the specified group name.
Public method 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
Public property Context Gets the current editing context. (Inherited from MenuBase.)
Public property DisplayName Gets or sets the localized text to display for the menu item. (Inherited from MenuBase.)
Public property HasDropDown Gets or sets a value indicating whether the menu items in the Items collection are added to a submenu.
Public property Items Gets a list of menu items to display as siblings within the same menu group.
Public property Name Gets or sets the unique identifier for the menu item. (Inherited from MenuBase.)

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Methods

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

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Events

  Name Description
Public event 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.

See Also

Reference

Microsoft.Windows.Design.Interaction Namespace

MenuAction

PrimarySelectionContextMenuProvider

Other Resources

Walkthrough: Creating a Menu Provider