[C#/WPF] 가상 키보드 사용하기

TestProject.zip

다운로드

▶ VirtualKeyboardHelper.cs

using System.Diagnostics;
using System.Linq;
using System.Windows;
using System.Windows.Input;
using System.Windows.Controls;

namespace TestProject
{
    /// <summary>
    /// 가상 키보드 헬퍼
    /// </summary>
    public static class VirtualKeyboardHelper
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 가상 키보드 지원 여부 속성
        /// </summary>
        public static readonly DependencyProperty IsSurpportVirtualKeyboardProperty;

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 파일명
        /// </summary>
        private static string _fileName = "osk.exe";

        /// <summary>
        /// 프로세스
        /// </summary>
        private static Process _process = null;

        /// <summary>
        /// 라우티드 이벤트 핸들러
        /// </summary>
        private static RoutedEventHandler _routedEventHandler = new RoutedEventHandler(targetFrameworkElement_Focus);

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Static

        #region 생성자 - VirtualKeyboardHelper()

        /// <summary>
        /// 생성자
        /// </summary>
        static VirtualKeyboardHelper()
        {
            IsSurpportVirtualKeyboardProperty = DependencyProperty.RegisterAttached
            (
                "IsSurpportVirtualKeyboard",
                typeof(bool?), 
                typeof(VirtualKeyboardHelper), 
                new FrameworkPropertyMetadata
                (
                    null,
                    new PropertyChangedCallback(IsSurpportScreenKeyboard_PropertyChanged)
                )
            );
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 가상 키보드 지원 여부 구하기 - GetIsSurpportVirtualKeyboard(targetFrameworkElement)

        /// <summary>
        /// 가상 키보드 지원 여부 구하기
        /// </summary>
        /// <param name="targetFrameworkElement">타겟 프레임워크 엘리먼트</param>
        /// <returns>가상 키보드 지원 여부</returns>
        public static bool GetIsSurpportVirtualKeyboard(FrameworkElement targetFrameworkElement)
        {
            return (bool)targetFrameworkElement.GetValue(IsSurpportVirtualKeyboardProperty);
        }

        #endregion
        #region 가상 키보드 지원 여부 설정하기 - SetIsSurpportVirtualKeyboard(targetFrameworkElement, isSurpportVirtualKeyboard)

        /// <summary>
        /// 가상 키보드 지원 여부 설정하기
        /// </summary>
        /// <param name="targetFrameworkElement">타겟</param>
        /// <param name="isSurpportVirtualKeyboard">가상 키보드 지원 여부</param>
        public static void SetIsSurpportVirtualKeyboard(FrameworkElement targetFrameworkElement, bool? isSurpportVirtualKeyboard)
        {
            targetFrameworkElement.SetValue(IsSurpportVirtualKeyboardProperty, isSurpportVirtualKeyboard);
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Private

        #region 가상 키보드 지원 여부 속성 변경시 처리하기 - IsSurpportScreenKeyboard_PropertyChanged(dependencyObject, e)

        /// <summary>
        /// 가상 키보드 지원 여부 속성 변경시 처리하기
        /// </summary>
        /// <param name="dependencyObject">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private static void IsSurpportScreenKeyboard_PropertyChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
        {
            FrameworkElement targetFrameworkElement = dependencyObject as FrameworkElement;

            if((bool)e.NewValue)
            {
                targetFrameworkElement.GotFocus  += _routedEventHandler;
                targetFrameworkElement.LostFocus += _routedEventHandler;
            }
            else if(_routedEventHandler.GetInvocationList().First().Target == targetFrameworkElement)
            {
                targetFrameworkElement.GotFocus  -= _routedEventHandler;
                targetFrameworkElement.LostFocus -= _routedEventHandler;    
            }
        }

        #endregion
        #region 타겟 프레임워크 엘리먼트 포커스시 처리하기 - targetFrameworkElement_Focus(sender, e)

        /// <summary>
        /// 타겟 프레임워크 엘리먼트 포커스시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private static void targetFrameworkElement_Focus(object sender, RoutedEventArgs e)
        {
            FrameworkElement targetFrameworkElement = sender   as FrameworkElement;
            FrameworkElement sourceFrameworkElement = e.Source as FrameworkElement;

            if((bool?)targetFrameworkElement.GetValue(IsSurpportVirtualKeyboardProperty) == false)
            {
                targetFrameworkElement.GotFocus -= _routedEventHandler;
                targetFrameworkElement.GotFocus -= _routedEventHandler;

                return;
            }
            else if((bool?)sourceFrameworkElement.GetValue(IsSurpportVirtualKeyboardProperty) != false &&
                e.RoutedEvent == FocusManager.GotFocusEvent && (e.Source is TextBox || e.Source is PasswordBox))
            {
                _process = Process.Start(_fileName);
            }
            else if(e.RoutedEvent == FocusManager.LostFocusEvent && _process != null)
            {
                if(_process.HasExited == false)
                {
                    _process.CloseMainWindow();
                }

                _process = null;
            }
        }  

        #endregion
    }
}

 

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▶ 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"
    xmlns:local="clr-namespace:TestProject"
    Width="800"
    Height="600"
    Title="가상 키보드 사용하기"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="50*" />
            <ColumnDefinition Width="50*" />
        </Grid.ColumnDefinitions>
        <Border Grid.Column="0"
            Margin="3">
            <GroupBox Header="가상 키보드 사용">
                <StackPanel
                    Margin="10 20 10 10"
                    local:VirtualKeyboardHelper.IsSurpportVirtualKeyboard="True">
                    <TextBlock
                        Margin="0 0 0 10"
                        Text="사용자 ID :" />
                    <TextBox
                        Margin="0 0 0 10"
                        Height="25" />
                    <TextBlock
                        Margin="0 0 0 10"
                        Text="비밀 번호 :" />
                    <PasswordBox
                        Margin="0 0 0 10"
                        Height="25" />
                </StackPanel>
            </GroupBox>
        </Border>
        <Border Grid.Column="1" Margin="3">
            <GroupBox Header="가상 키보드 미사용">
                <StackPanel
                    Margin="10 20 10 10"
                    local:VirtualKeyboardHelper.IsSurpportVirtualKeyboard="False">
                    <TextBlock
                        Margin="0 0 0 10"
                        Text="사용자 ID :" />
                    <TextBox
                        Margin="0 0 0 10"
                        Height="25" />
                    <TextBlock
                        Margin="0 0 0 10"
                        Text="비밀 번호 :" />
                    <PasswordBox
                        Margin="0 0 0 10"
                        Height="25" />
                </StackPanel>
            </GroupBox>
        </Border>
    </Grid>
</Window>