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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.Windows;
  6. using System.Windows.Controls;
  7. using System.Windows.Data;
  8. using System.Windows.Documents;
  9. using System.Windows.Input;
  10. using System.Windows.Media;
  11. using System.Windows.Media.Imaging;
  12. using System.Windows.Navigation;
  13. using System.Windows.Shapes;
  14.  
  15. namespace WpfApplication1
  16. {
  17.     /// <summary>
  18.     /// MainWindow.xaml の相互作用ロジック
  19.     /// </summary>
  20.     public partial class MainWindow : Window
  21.     {
  22.         bool _leftIsDragging;
  23.         bool _rightIsDragging;
  24.         bool _middleIsDragging;
  25.         Point _leftDragOffset;
  26.         Point _rightDragOffset;
  27.         Point _middleDragOffset;
  28.  
  29.         TranslateTransform _pan;
  30.         ScaleTransform _zoom;
  31.         RotateTransform _turn;
  32.  
  33.         public MainWindow()
  34.         {
  35.             InitializeComponent();
  36.  
  37.             _pan = new TranslateTransform();
  38.             _zoom = new ScaleTransform(1.0,1.0,controlTarget.Height/2,controlTarget.Width/2);
  39.             _turn = new RotateTransform();
  40.  
  41.             TransformGroup tGroup = new TransformGroup();
  42.             tGroup.Children.Add(_zoom);
  43.             tGroup.Children.Add(_turn);
  44.             tGroup.Children.Add(_pan);
  45.             controlTarget.RenderTransform = tGroup;
  46.  
  47.             controlTarget.MouseDown += new MouseButtonEventHandler(controlTarget_MouseDown);
  48.             controlTarget.MouseMove += new MouseEventHandler(controlTarget_MouseMove);
  49.             controlTarget.MouseUp += new MouseButtonEventHandler(controlTarget_MouseUp);
  50.  
  51.             this.KeyDown += new KeyEventHandler(MainWindow_KeyDown);
  52.         }
  53.  
  54.         void MainWindow_KeyDown(object sender, KeyEventArgs e)
  55.         {
  56.             if (e.Key == Key.Escape)
  57.             {
  58.                 _pan.X = 0;
  59.                 _pan.Y = 0;
  60.                 _zoom.ScaleX = 1;
  61.                 _zoom.ScaleY = 1;
  62.                 _zoom.CenterX = controlTarget.Height/2;
  63.                 _zoom.CenterY = controlTarget.Width / 2;
  64.             }
  65.         }
  66.  
  67.         void controlTarget_MouseDown(object sender, MouseButtonEventArgs e)
  68.         {
  69.             if (e.ChangedButton == MouseButton.Left)
  70.             {
  71.                 var s = sender as UIElement;
  72.                 s.CaptureMouse();
  73.                 _leftDragOffset = e.GetPosition(this);
  74.                 _leftIsDragging = true;
  75.             }
  76.             else
  77.             {
  78.                 if (e.ChangedButton == MouseButton.Right)
  79.                 {
  80.                     var s = sender as UIElement;
  81.                     s.CaptureMouse();
  82.                     _rightDragOffset = e.GetPosition(this);
  83.                     _rightIsDragging = true;
  84.                     //Point center = e.GetPosition(s);
  85.                     //_zoom.CenterX = center.X;
  86.                     //_zoom.CenterY = center.Y;
  87.                 }
  88.             }
  89.         }
  90.  
  91.         void controlTarget_MouseMove(object sender, MouseEventArgs e)
  92.         {
  93.             if (_leftIsDragging)
  94.             {
  95.                 var s = sender as UIElement;
  96.                 Point p = e.GetPosition(this);
  97.                 _pan.X += p.X - _leftDragOffset.X;
  98.                 _pan.Y += p.Y - _leftDragOffset.Y;
  99.                 _leftDragOffset = p;
  100.             }
  101.             else
  102.             {
  103.                 if (_rightIsDragging)
  104.                 {
  105.                     var s = sender as UIElement;
  106.                     Point p = e.GetPosition(this);
  107.                     double delta = (_rightDragOffset.Y - p.Y) * 0.01;
  108.                     _zoom.ScaleX += delta;
  109.                     _zoom.ScaleY += delta;
  110.                     _rightDragOffset = p;
  111.                 }
  112.             }
  113.         }
  114.  
  115.         void controlTarget_MouseUp(object sender, MouseButtonEventArgs e)
  116.         {
  117.             if (e.ChangedButton == MouseButton.Left)
  118.             {
  119.                 var s = sender as UIElement;
  120.                 s.ReleaseMouseCapture();
  121.                 _leftIsDragging = false;
  122.             }
  123.             if (e.ChangedButton == MouseButton.Right)
  124.             {
  125.                 var s = sender as UIElement;
  126.                 s.ReleaseMouseCapture();
  127.                 _rightIsDragging = false;
  128.             }
  129.         }
  130.     }
  131. }
  132.  
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https://ideone.com/VWd7l
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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