PrimarySelectionContextMenuProvider 클래스

현재 선택 내용에 표시되는 MenuGroup 항목 집합을 제공합니다.

상속 계층 구조

System.Object
  Microsoft.Windows.Design.Features.FeatureProvider
    Microsoft.Windows.Design.Interaction.ContextMenuProvider
      Microsoft.Windows.Design.Interaction.PrimarySelectionContextMenuProvider

네임스페이스:  Microsoft.Windows.Design.Interaction
어셈블리:  Microsoft.Windows.Design.Interaction(Microsoft.Windows.Design.Interaction.dll)

구문

‘선언
<UsesItemPolicyAttribute(GetType(PrimarySelectionPolicy))> _
Public MustInherit Class PrimarySelectionContextMenuProvider _
    Inherits ContextMenuProvider

[UsesItemPolicyAttribute(typeof(PrimarySelectionPolicy))]
public abstract class PrimarySelectionContextMenuProvider : ContextMenuProvider

[UsesItemPolicyAttribute(typeof(PrimarySelectionPolicy))]
public ref class PrimarySelectionContextMenuProvider abstract : public ContextMenuProvider

[<AbstractClass>]
[<UsesItemPolicyAttribute(typeof(PrimarySelectionPolicy))>]
type PrimarySelectionContextMenuProvider =  
    class
        inherit ContextMenuProvider
    end

public abstract class PrimarySelectionContextMenuProvider extends ContextMenuProvider

PrimarySelectionContextMenuProvider 형식에서는 다음과 같은 멤버를 노출합니다.

생성자

	이름	설명
	PrimarySelectionContextMenuProvider	PrimarySelectionContextMenuProvider 클래스의 새 인스턴스를 초기화합니다.

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속성

	이름	설명
	Items	상황에 맞는 메뉴에 추가할 항목을 가져옵니다. (ContextMenuProvider에서 상속됨)

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메서드

	이름	설명
	Equals	지정한 Object가 현재 Object와 같은지 여부를 확인합니다. (Object에서 상속됨)
	Finalize	가비지 수집에서 회수하기 전에 개체에서 리소스를 해제하고 다른 정리 작업을 수행할 수 있게 합니다. (Object에서 상속됨)
	GetHashCode	특정 형식에 대한 해시 함수 역할을 합니다. (Object에서 상속됨)
	GetType	현재 인스턴스의 Type을 가져옵니다. (Object에서 상속됨)
	MemberwiseClone	현재 Object의 단순 복사본을 만듭니다. (Object에서 상속됨)
	ToString	현재 개체를 나타내는 문자열을 반환합니다. (Object에서 상속됨)
	Update	메뉴 항목의 표시 여부 및 활성 상태를 새로 고칠 수 있도록 UpdateItemStatus 이벤트를 발생시킵니다. (ContextMenuProvider에서 상속됨)

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이벤트

	이름	설명
	UpdateItemStatus	메뉴 항목이 표시되기 직전에 발생합니다. (ContextMenuProvider에서 상속됨)

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설명

PrimarySelectionContextMenuProvider 클래스에서 상속하여 디자인 화면에서 컨트롤을 선택할 때 표시되는 상황에 맞는 메뉴 항목을 추가합니다. UpdateItemStatus 이벤트를 처리하여 상황에 맞는 메뉴가 표시되기 전에 MenuAction 항목을 설정합니다.

예제

다음 코드 예제에서는 PrimarySelectionContextMenuProvider 클래스에서 사용자 지정 형식을 파생하는 방법을 보여 줍니다. 파생된 형식은 디자인 타임에 컨트롤의 Background 속성을 설정하는 사용자 지정 상황별 메뉴를 구현합니다. 자세한 내용은 연습: 메뉴 공급자 만들기을 참조하십시오.

Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.Windows.Design.Interaction
Imports System.Windows
Imports Microsoft.Windows.Design.Model
Imports System.Windows.Controls
Imports System.Windows.Media

' The CustomContextMenuProvider class provides two context menu items
' at design time. These are implemented with the MenuAction class.
Class CustomContextMenuProvider
    Inherits PrimarySelectionContextMenuProvider

    Private setBackgroundToBlueMenuAction As MenuAction
    Private clearBackgroundMenuAction As MenuAction

    ' 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 following method handles the UpdateItemStatus event.
    ' It sets the MenuAction states according to the state
    ' of the control's Background property. This method is
    ' called before the context menu is shown.
    Sub CustomContextMenuProvider_UpdateItemStatus( _
        ByVal sender As Object, _
        ByVal e As MenuActionEventArgs)

        ' Turn everything on, and then based on the value 
        ' of the BackgroundProperty, selectively turn some off.
        clearBackgroundMenuAction.Checked = False
        clearBackgroundMenuAction.Enabled = True
        setBackgroundToBlueMenuAction.Checked = False
        setBackgroundToBlueMenuAction.Enabled = True

        ' Get a ModelItem which represents the selected control. 
        Dim selectedControl As ModelItem = _
            e.Selection.PrimarySelection

        ' Get the value of the Background property from the ModelItem.
        Dim backgroundProperty As ModelProperty = _
            selectedControl.Properties("Background")

        ' Set the MenuAction items appropriately.
        If Not backgroundProperty.IsSet Then
            clearBackgroundMenuAction.Checked = True
            clearBackgroundMenuAction.Enabled = False
        ElseIf backgroundProperty.ComputedValue.Equals(Brushes.Blue) Then
            setBackgroundToBlueMenuAction.Checked = True
            setBackgroundToBlueMenuAction.Enabled = False
        End If

    End Sub

    ' The following method handles the Execute event. 
    ' It sets the Background property to its default value.
    Sub ClearBackground_Execute( _
        ByVal sender As Object, _
        ByVal e As MenuActionEventArgs)

        Dim selectedControl As ModelItem = e.Selection.PrimarySelection
        selectedControl.Properties("Background").ClearValue()

    End Sub

    ' The following method handles the Execute event. 
    ' It sets the Background property to Brushes.Blue.
    Sub SetBackgroundToBlue_Execute( _
        ByVal sender As Object, _
        ByVal e As MenuActionEventArgs)

        Dim selectedControl As ModelItem = e.Selection.PrimarySelection
        selectedControl.Properties("Background").SetValue(Brushes.Blue)

    End Sub

End Class

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Windows.Design.Interaction;
using System.Windows;
using Microsoft.Windows.Design.Model;
using System.Windows.Controls;
using System.Windows.Media;

namespace CustomControlLibrary.VisualStudio.Design
{
    // The CustomContextMenuProvider class provides two context menu items
    // at design time. These are implemented with the MenuAction class.
    class CustomContextMenuProvider : PrimarySelectionContextMenuProvider
    {
        private MenuAction setBackgroundToBlueMenuAction;
        private MenuAction clearBackgroundMenuAction;

        // 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);
        }

        // The following method handles the UpdateItemStatus event.
        // It sets the MenuAction states according to the state
        // of the control's Background property. This method is
        // called before the context menu is shown.
        void CustomContextMenuProvider_UpdateItemStatus(
            object sender, 
            MenuActionEventArgs e)
        {
            // Turn everything on, and then based on the value 
            // of the BackgroundProperty, selectively turn some off.
            clearBackgroundMenuAction.Checked = false;
            clearBackgroundMenuAction.Enabled = true;
            setBackgroundToBlueMenuAction.Checked = false;
            setBackgroundToBlueMenuAction.Enabled = true;

            // Get a ModelItem which represents the selected control. 
            ModelItem selectedControl = e.Selection.PrimarySelection;

            // Get the value of the Background property from the ModelItem.
            ModelProperty backgroundProperty = 
                selectedControl.Properties["Background"];

            // Set the MenuAction items appropriately.
            if (!backgroundProperty.IsSet)
            {
                clearBackgroundMenuAction.Checked = true;
                clearBackgroundMenuAction.Enabled = false;
            }
            else if (backgroundProperty.ComputedValue == Brushes.Blue)
            {
                setBackgroundToBlueMenuAction.Checked = true;
                setBackgroundToBlueMenuAction.Enabled = false;
            }
        }

        // The following method handles the Execute event. 
        // It sets the Background property to its default value.
        void ClearBackground_Execute(
            object sender, 
            MenuActionEventArgs e)
        {
            ModelItem selectedControl = e.Selection.PrimarySelection;
            selectedControl.Properties["Background"].ClearValue();
        }

        // The following method handles the Execute event. 
        // It sets the Background property to Brushes.Blue.
        void SetBackgroundToBlue_Execute(
            object sender, 
            MenuActionEventArgs e)
        {
            ModelItem selectedControl = e.Selection.PrimarySelection;
            selectedControl.Properties["Background"].SetValue(Brushes.Blue);
        }
    }
}

스레드로부터의 안전성

이 형식의 모든 공용 static(Visual Basic의 경우 Shared) 멤버는 스레드로부터 안전합니다. 인터페이스 멤버는 스레드로부터 안전하지 않습니다.

참고 항목

참조

Microsoft.Windows.Design.Interaction 네임스페이스

MenuGroup

MenuAction