[C#/WPF] TextBox 엘리먼트 : ContextMenu 속성을 사용해 커스텀 컨텍스트 메뉴 만들기

■ TextBox 엘리먼트의 ContextMenu 속성을 사용해 커스텀 컨텍스트 메뉴를 만드는 방법을 보여준다.

TestProject.zip

0.01MB

▶ MainWindow.xaml

<Window x:Class="TestProject.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Width="800"
    Height="600"
    Title="TestProject"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <TextBox Name="textBox"
        Margin="10"
        AcceptsReturn="True"
        AcceptsTab="True"
        VerticalScrollBarVisibility="Visible"
        TextWrapping="Wrap">
        <TextBox.ContextMenu>
            <ContextMenu Name="contextMenu">
                <MenuItem Name="cutMenuItem"
                    Header="Cut" />
                <MenuItem Name="copyMenuItem"
                    Header="Copy" />
                <MenuItem Name="pasteMenuItem"
                    Header="Paste" />
                <Separator/>
                <MenuItem Name="selectAllMenuItem"
                    Header="Select All" />
                <MenuItem Name="selectLineMenuItem"
                    Header="Select Current Line" />
                <Separator />
                <MenuItem Name="undoMenuItem"
                    Header="Undo Last Action" />
                <MenuItem Name="redoMenuItem"
                    Header="Redo Last Action" />
                <Separator />
                <MenuItem Name="clearMenuItem"
                    Header="Clear All Text" />
            </ContextMenu>
        </TextBox.ContextMenu>
        This TextBox uses a simple custom context menu.  The context menu can be disabled by checking
        the CheckBox above, which simply sets the TextBox.ContextMenu property to null.
    </TextBox>
</Window>

 

▶ MainWindow.xaml.cs

using System.Windows;

namespace TestProject
{
    /// <summary>
    /// 메인 윈도우
    /// </summary>
    public partial class MainWindow : Window
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainWindow()
        {
            InitializeComponent();

            this.contextMenu.Opened       += contextMenu_Opened;
            this.cutMenuItem.Click        += cutMenuItem_Click;
            this.copyMenuItem.Click       += copyMenuItem_Click;
            this.pasteMenuItem.Click      += pasteMenuItem_Click;
            this.selectAllMenuItem.Click  += selectAllMenuItem_Click;
            this.selectLineMenuItem.Click += selectLineMenuItem_Click;
            this.undoMenuItem.Click       += undoMenuItem_Click;
            this.redoMenuItem.Click       += redoMenuItem_Click;
            this.clearMenuItem.Click      += clearMenuItem_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 컨텍스트 메뉴 오픈시 처리하기 - contextMenu_Opened(sender, e)

        /// <summary>
        /// 컨텍스트 메뉴 오픈시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void contextMenu_Opened(object sender, RoutedEventArgs e)
        {
            if(this.textBox.SelectedText == string.Empty)
            {
                this.copyMenuItem.IsEnabled = this.cutMenuItem.IsEnabled = false;
            }
            else
            {
                this.copyMenuItem.IsEnabled = this.cutMenuItem.IsEnabled = true;
            }

            if(Clipboard.ContainsText())
            {
                this.pasteMenuItem.IsEnabled = true;
            }
            else
            {
                this.pasteMenuItem.IsEnabled = false;
            }
        }

        #endregion
        #region Cut 메뉴 항목 클릭시 처리하기 - cutMenuItem_Click(sender, e)

        /// <summary>
        /// Cut 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void cutMenuItem_Click(object sender, RoutedEventArgs e)
        {
            this.textBox.Cut();
        }

        #endregion
        #region Copy 메뉴 항목 클릭시 처리하기 - copyMenuItem_Click(sender, e)

        /// <summary>
        /// Copy 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void copyMenuItem_Click(object sender, RoutedEventArgs e)
        {
            this.textBox.Copy();
        }

        #endregion
        #region Paste 메뉴 항목 클릭시 처리하기 - pasteMenuItem_Click(sender, e)

        /// <summary>
        /// Paste 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void pasteMenuItem_Click(object sender, RoutedEventArgs e)
        {
            this.textBox.Paste();
        }

        #endregion
        #region Select All 메뉴 항목 클릭시 처리하기 - selectAllMenuItem_Click(sender, e)

        /// <summary>
        /// Select All 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void selectAllMenuItem_Click(object sender, RoutedEventArgs e)
        {
            this.textBox.SelectAll();
        }

        #endregion
        #region Select Line 메뉴 항목 클릭시 처리하기 - selectLineMenuItem_Click(sender, e)

        /// <summary>
        /// Select Line 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void selectLineMenuItem_Click(object sender, RoutedEventArgs e)
        {
            int lineIndex = this.textBox.GetLineIndexFromCharacterIndex(this.textBox.CaretIndex);

            int characterIndex = this.textBox.GetCharacterIndexFromLineIndex(lineIndex);

            int lineLength = this.textBox.GetLineLength(lineIndex);

            this.textBox.Select(characterIndex, lineLength);
        }

        #endregion
        #region Undo 메뉴 항목 클릭시 처리하기 - undoMenuItem_Click(sender, e)

        /// <summary>
        /// Undo 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void undoMenuItem_Click(object sender, RoutedEventArgs e)
        {
            this.textBox.Undo();
        }

        #endregion
        #region Redo 메뉴 항목 클릭시 처리하기 - redoMenuItem_Click(sender, e)

        /// <summary>
        /// Redo 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void redoMenuItem_Click(object sender, RoutedEventArgs e)
        {
            this.textBox.Redo();
        }

        #endregion
        #region Clear 메뉴 항목 클릭시 처리하기 - clearMenuItem_Click(sender, e)

        /// <summary>
        /// Clear 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void clearMenuItem_Click(object sender, RoutedEventArgs e)
        {
            this.textBox.Clear();
        }

        #endregion
    }
}