UserActionMouseWheel Event

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.MedicalViewer; 
 
public void MedicalViewerEventsExample() 
{ 
   MainForm3 form = new MainForm3(); 
   form.ShowDialog(); 
} 
 
// MainForm1 will be the owner of the medical viewer control. 
class MainForm3 : Form 
{ 
   private MedicalViewer _medicalViewer; 
   private bool _mouseDown; 
 
   void _medicalViewer_UserActionMouseMove(object sender, MedicalViewerMouseEventArgs e) 
   { 
      // Increase the gamma of the image as the user drags the mouse. 
      if ((e.ActionID == 101) && _mouseDown) 
      { 
         ((MedicalViewerCell)sender).Image.PaintGamma += 1; 
         ((MedicalViewerCell)sender).Invalidate(); 
      } 
   } 
 
   void _medicalViewer_UserActionMouseUp(object sender, MedicalViewerMouseEventArgs e) 
   { 
      _mouseDown = false; 
   } 
 
   void _medicalViewer_UserActionMouseDown(object sender, MedicalViewerMouseEventArgs e) 
   { 
      _mouseDown = true; 
   } 
 
   void _medicalViewer_UserActionKeyDown(object sender, MedicalViewerKeyEventArgs e) 
   { 
      if (((MedicalViewerCell)sender).Image.PaintGamma > 1) 
         ((MedicalViewerCell)sender).Image.PaintGamma -= 1; 
   } 
 
   void _medicalViewer_UserActionKeyUp(object sender, MedicalViewerKeyEventArgs e) 
   { 
      ((MedicalViewerCell)sender).Invalidate(); 
   } 
 
   void _medicalViewer_CustomPaint(object sender, MedicalViewerPaintEventArgs e) 
   { 
      // draw red ellipse around the first frame of the first cell. 
      if ((e.CellIndex == 0) && (e.SubCellIndex == 0)) 
         e.Graphics.DrawEllipse(Pens.Red, e.ClipRectangle); 
   } 
 
   void _medicalViewer_UserTag(object sender, MedicalViewerUserTagEventArgs e) 
   { 
      // draw red string at the bottom right edge of the first cell. 
      if (e.CellIndex == 0) 
         e.Graphics.DrawString("Owner Draw", new Font(FontFamily.GenericSerif, 15), Brushes.Red, new PointF(e.ClipRectangle.Left, e.ClipRectangle.Top)); 
   } 
 
   public MainForm3() 
   { 
      RasterCodecs _codecs = new RasterCodecs(); 
      RasterImage _image; 
 
      // Create the medical viewer and adjust some properties. 
      _medicalViewer = new MedicalViewer(); 
      _medicalViewer.Rows = 1; 
      _medicalViewer.Columns = 2; 
      _medicalViewer.Location = new Point(0, 0); 
      _medicalViewer.Size = new Size(this.ClientRectangle.Right, this.ClientRectangle.Bottom); 
 
      // Load an image and then add it to the control. 
      _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "image3.dcm")); 
      MedicalViewerCell cell = new MedicalViewerCell(_image, true); 
      cell.AddAction((MedicalViewerActionType)101); 
      cell.SetAction((MedicalViewerActionType)101, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active); 
 
      cell.SetActionKeys((MedicalViewerActionType)101, new MedicalViewerKeys(Keys.Up, Keys.Down, Keys.Left, Keys.Right, MedicalViewerModifiers.None)); 
 
      cell.UserTag += new EventHandler<MedicalViewerUserTagEventArgs>(_medicalViewer_UserTag); 
      cell.CustomPaint += new EventHandler<MedicalViewerPaintEventArgs>(_medicalViewer_CustomPaint); 
      cell.UserActionMouseDown += new EventHandler<MedicalViewerMouseEventArgs>(_medicalViewer_UserActionMouseDown); 
      cell.UserActionMouseUp += new EventHandler<MedicalViewerMouseEventArgs>(_medicalViewer_UserActionMouseUp); 
      cell.UserActionMouseMove += new EventHandler<MedicalViewerMouseEventArgs>(_medicalViewer_UserActionMouseMove); 
      cell.UserActionKeyUp += new EventHandler<MedicalViewerKeyEventArgs>(_medicalViewer_UserActionKeyUp); 
      cell.UserActionKeyDown += new EventHandler<MedicalViewerKeyEventArgs>(_medicalViewer_UserActionKeyDown); 
 
      _medicalViewer.Cells.Add(cell); 
 
      // adjust some properties of the cell and add some tags. 
      cell.SetTag(2, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "EX. ID 230-36-5448"); 
      cell.SetTag(4, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Frame); 
      cell.SetTag(6, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Scale); 
      cell.SetTag(2, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.WindowLevelData); 
      cell.SetTag(1, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.FieldOfView); 
      cell.SetTag(1, MedicalViewerTagAlignment.TopRight, MedicalViewerTagType.UserData, "Good, Guy"); 
      cell.SetTag(2, MedicalViewerTagAlignment.TopRight, MedicalViewerTagType.UserData, "PID 125-98-445"); 
      cell.SetTag(3, MedicalViewerTagAlignment.TopRight, MedicalViewerTagType.UserData, "DOB 08/02/1929"); 
      cell.SetTag(5, MedicalViewerTagAlignment.TopRight, MedicalViewerTagType.UserData, "03/16/1999"); 
      cell.SetTag(0, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.RulerUnit); 
      cell.SetTag(0, MedicalViewerTagAlignment.BottomRight, MedicalViewerTagType.OwnerDraw); 
 
      Controls.Add(_medicalViewer); 
      _medicalViewer.Dock = DockStyle.Fill; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}