kjun.kr (kjcoder.tistory.com)

MainWindow.xaml

<Window x:Class="ImageZoomPanning.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

        xmlns:local="clr-namespace:ImageZoomPanning"

        mc:Ignorable="d"

        Title="MainWindow" Height="450" Width="800">

    <Grid x:Name="LayoutRoot" Height="300">

        <Grid.RowDefinitions>

            <RowDefinition Height="52.92"/>

            <RowDefinition Height="*"/>

        </Grid.RowDefinitions>

        <Border Grid.Row="1" Name="border" Background="Gray" ClipToBounds="True">

            <Image Name="image" Source="iron-man-wallpaper-hd-9.jpg" Opacity="1" RenderTransformOrigin="0.5,0.5" ClipToBounds="True" />

        </Border>

    </Grid>

</Window>

MainWindow.xaml.cs

using System.Linq;

using System.Windows;

using System.Windows.Input;

using System.Windows.Media;

namespace ImageZoomPanning

{

    /// <summary>

    /// MainWindow.xaml에 대한 상호 작용 논리

    /// </summary>

    public partial class MainWindow : Window

    {

        /// <summary>

        /// 원본 포인트입니다.

        /// </summary>

        private Point origin;

        /// <summary>

        /// 시작 포인트입니다.

        /// </summary>

        private Point start;

        /// <summary>

        /// 생성자입니다.

        /// </summary>

        public MainWindow()

        {

            InitializeComponent();

            TransformGroup transformGroup = new TransformGroup();

            ScaleTransform scaleTransform = new ScaleTransform();

            transformGroup.Children.Add(scaleTransform);

            TranslateTransform translateTransform = new TranslateTransform();

            transformGroup.Children.Add(translateTransform);

            image.RenderTransform = transformGroup;

            image.MouseWheel += image_MouseWheel;

            image.MouseLeftButtonDown += image_MouseLeftButtonDown;

            image.MouseLeftButtonUp += image_MouseLeftButtonUp;

            image.MouseMove += image_MouseMove;

        }

        /// <summary>

        /// 마우스 휠 움직임에 따라 Zoon In/Out 합니다.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void image_MouseWheel(object sender, MouseWheelEventArgs e)

        {

            var transform = (ScaleTransform)((TransformGroup)image.RenderTransform).Children.First(c => c is ScaleTransform);

            double zoom = e.Delta > 0 ? .2 : -.2;

            transform.ScaleX += zoom;

            transform.ScaleY += zoom;

        }

        /// <summary>

        /// 좌클릭에 따라 패닝을 시작합니다.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void image_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

        {

            image.CaptureMouse();

            var translateTransform = (TranslateTransform)((TransformGroup)image.RenderTransform).Children.First(c => c is TranslateTransform);

            start = e.GetPosition(border);

            origin = new Point(translateTransform.X, translateTransform.Y);

        }

        /// <summary>

        /// 마우스 우버튼 놓을때 패닝되던 이미지가 멈춥니다

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void image_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

        {

            image.ReleaseMouseCapture();

        }

        /// <summary>

        /// 마우스 움직임에 따라 이미지가 패닝됩니다.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void image_MouseMove(object sender, MouseEventArgs e)

        {

            if (!image.IsMouseCaptured) return;

            var translateTransform = (TranslateTransform)((TransformGroup)image.RenderTransform).Children.First(c => c is TranslateTransform);

            Vector v = start - e.GetPosition(border);

            translateTransform.X = origin.X - v.X;

            translateTransform.Y = origin.Y - v.Y;

        }

    }

}