ArcEngine(4)パンの学習

地図の平行移動は、最も重要な機能の一つと言えるが、多くの地図のデフォルトツールは平行移動である.AEは平行移動を実現し、比較的簡単で、コードは以下の通りである.

   1:    /// <summary>

   2:      ///   

   3:      /// </summary>

   4:      public class Pan : GISTools.Base.ToolBase

   5:      {

   6:         

   7:          private bool m_PanOperation;

   8:   

   9:          public Pan()

  10:              : base("Pan")

  11:          { }

  12:   

  13:          public Pan(AxMapControl mapCtl) 

  14:              : base(mapCtl, "Pan") 

  15:          {

  16:              if (m_cursor == null) m_cursor = getCursor(esriSystemMouseCursor.esriSystemMouseCursorPan);

  17:          }

  18:   

  19:          public Pan(AxPageLayoutControl plCtl)

  20:              : base(plCtl, "Pan")

  21:          {

  22:              if (m_cursor == null) m_cursor = getCursor(esriSystemMouseCursor.esriSystemMouseCursorPan);

  23:          }

  24:   

  25:          public override void OnMouseDown(int Button, int Shift, int X, int Y)

  26:          {

  27:              if (Button != 1) return;

  28:             IPoint point =m_pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);

  29:             m_pActiveView.ScreenDisplay.PanStart(point);

  30:              m_PanOperation = true;

  31:          }

  32:   

  33:          public override void OnMouseMove(int Button, int Shift, int X, int Y)

  34:          {

  35:              if (Button != 1) return;

  36:   

  37:              if (!m_PanOperation) return;

  38:   

  39:              IPoint point = m_pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);

  40:              m_pActiveView.ScreenDisplay.PanMoveTo(point);

  41:          }

  42:   

  43:          public override void OnMouseUp(int Button, int Shift, int X, int Y)

  44:          {

  45:              if (Button != 1) return;

  46:   

  47:              if (!m_PanOperation) return;

  48:   

  49:              IEnvelope extent = m_pActiveView.ScreenDisplay.PanStop();

  50:   

  51:              if (extent != null)

  52:              {

  53:                  m_pActiveView.ScreenDisplay.DisplayTransformation.VisibleBounds = extent;

  54:                  m_pActiveView.ScreenDisplay.Invalidate(null, true, (short)esriScreenCache.esriAllScreenCaches);

  55:              }

  56:              m_PanOperation = false;

  57:          }

  58:      }

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