[C#/WPF] Behavior<T> 클래스 : 마우스를 사용해 색상 선택 동작 사용하기

TestProject.zip

다운로드

 

▶ MouseColorSelectBehavior.cs

using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Interactivity;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace TestProject
{
    /// <summary>
    /// 마우스 색상 선택 동작
    /// </summary>
    public class MouseColorSelectBehavior : Behavior<Image>
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Dependency Property
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 선택 색상 속성 - SelectedColorProperty

        /// <summary>
        /// 선택 색상 속성
        /// </summary>
        public static readonly DependencyProperty SelectedColorProperty = DependencyProperty.Register
        (
            "SelectedColor",
            typeof(Color),
            typeof(MouseColorSelectBehavior),
            new UIPropertyMetadata(Colors.White)
        );

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 선택 색상 - SelectedColor

        /// <summary>
        /// 선택 색상
        /// </summary>
        public Color SelectedColor
        {
            get
            {
                return (Color)GetValue(SelectedColorProperty);
            }
            set
            {
                SetValue(SelectedColorProperty, value);
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Protected

        #region 부착시 처리하기 - OnAttached()

        /// <summary>
        /// 부착시 처리하기
        /// </summary>
        protected override void OnAttached()
        {
            base.OnAttached();

            AssociatedObject.MouseDown += AssociatedObject_MouseDown;
            AssociatedObject.MouseMove += AssociatedObject_MouseMove;
        }

        #endregion
        #region 탈착시 처리하기 - OnDetaching()

        /// <summary>
        /// 탈착시 처리하기
        /// </summary>
        protected override void OnDetaching()
        {
            base.OnDetaching();

            AssociatedObject.MouseDown -= AssociatedObject_MouseDown;
            AssociatedObject.MouseMove -= AssociatedObject_MouseMove;
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 결합 객체 마우스 DOWN 처리하기 - AssociatedObject_MouseDown(sender, e)

        /// <summary>
        /// 결합 객체 마우스 DOWN 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void AssociatedObject_MouseDown(object sender, MouseButtonEventArgs e)
        {
            SetSelectedColor();
        }

        #endregion
        #region 결합 객체 마우스 이동시 처리하기 - AssociatedObject_MouseMove(sender, e)

        /// <summary>
        /// 결합 객체 마우스 이동시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void AssociatedObject_MouseMove(object sender, MouseEventArgs e)
        {
            if(e.LeftButton == MouseButtonState.Pressed)
            {
                SetSelectedColor();
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 선택 색상 설정하기 - SetSelectedColor()

        /// <summary>
        /// 선택 색상 설정하기
        /// </summary>
        private void SetSelectedColor()
        {
            Point point = Mouse.GetPosition(AssociatedObject);

            RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap
            (
                (int)AssociatedObject.ActualWidth,
                (int)AssociatedObject.ActualHeight,
                96,
                96,
                PixelFormats.Default
            );

            renderTargetBitmap.Render(AssociatedObject);

            if((point.X <= renderTargetBitmap.PixelWidth) && (point.Y <= renderTargetBitmap.PixelHeight))
            {
                CroppedBitmap croppedBitmap = new CroppedBitmap
                (
                    renderTargetBitmap,
                    new Int32Rect((int)point.X, (int)point.Y, 1, 1)
                );

                byte[] pixelByteArray = new byte[4];

                croppedBitmap.CopyPixels(pixelByteArray, 4, 0);

                SelectedColor = Color.FromArgb(255, pixelByteArray[2], pixelByteArray[1], pixelByteArray[0]);
            }
        }

        #endregion
    }
}

 

728x90

 

▶ 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:i="http://schemas.microsoft.com/expression/2010/interactivity"
    xmlns:local="clr-namespace:TestProject"
    Width="800"
    Height="600"
    Title="Behavior&lt;T&gt; 클래스 : 마우스를 사용해 색상 선택 동작 사용하기"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid>
        <Grid
            HorizontalAlignment="Center"
            VerticalAlignment="Center">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"    />
                <ColumnDefinition Width="10"   />
                <ColumnDefinition Width="Auto" />
            </Grid.ColumnDefinitions>
            <Image Grid.Column="0"
                Stretch="Fill"
                Width="500"
                Height="500"
                Source="IMAGE\sample.png">
                <i:Interaction.Behaviors>
                    <local:MouseColorSelectBehavior x:Name="behavior" />
                </i:Interaction.Behaviors>
            </Image>
            <Rectangle Grid.Column="2"
                Margin="10"
                HorizontalAlignment="Right"
                VerticalAlignment="Bottom"
                Stroke="Black"
                StrokeThickness="1"
                Width="100"
                Height="100">
                <Rectangle.Fill>
                    <SolidColorBrush Color="{Binding ElementName=behavior, Path=SelectedColor}" />
                </Rectangle.Fill>
            </Rectangle>
        </Grid>
    </Grid>
</Window>