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CustomPaint Event
See Also 
Leadtools.MedicalViewer Namespace > MedicalViewerCell Class : CustomPaint Event



The CustomPaint Event is available as an add-on to the LEADTOOLS Medical Imaging toolkits.

Optional delegate method for additional processing.

Syntax

Visual Basic (Declaration) 
Public Event CustomPaint As EventHandler(Of MedicalViewerPaintEventArgs)
Visual Basic (Usage)Copy Code
Dim instance As MedicalViewerCell
Dim handler As EventHandler(Of MedicalViewerPaintEventArgs)
 
AddHandler instance.CustomPaint, handler
C# 
public event EventHandler<MedicalViewerPaintEventArgs> CustomPaint
C++/CLI 
public:
event EventHandler<MedicalViewerPaintEventArgs^>^ CustomPaint

Event Data

The event handler receives an argument of type MedicalViewerPaintEventArgs containing data related to this event. The following MedicalViewerPaintEventArgs properties provide information specific to this event.

PropertyDescription
CellIndex Gets or sets the value that indicates the index of the cell that will be painted. This value is only valid if the cell is add to the MedicalViewer.
ClipRectangle (Inherited from System.Windows.Forms.PaintEventArgs)Gets the rectangle in which to paint.
Graphics (Inherited from System.Windows.Forms.PaintEventArgs)Gets the graphics used to paint.
SubCellIndex Gets or sets the value that indicates the index of the sub-cell that will be painted.

Example

Add some event to apply some additional painting and processing

Visual BasicCopy Code
Public Sub MedicalViewerEventsExample()
         Dim form As MainForm3 = New MainForm3()
         form.ShowDialog()
      End Sub
#End If
      ' MainForm1 will be the owner of the medical viewer control.
      Private Class MainForm3 : Inherits Form
         Private _medicalViewer As MedicalViewer
         Private _mouseDown As Boolean

         Private Sub _medicalViewer_UserActionMouseMove(ByVal sender As Object, ByVal e As MedicalViewerMouseEventArgs)
            ' Increase the gamma of the image as the user drags the mouse.
            If (e.ActionID = 101) AndAlso _mouseDown Then
               CType(sender, MedicalViewerCell).Image.PaintGamma += 1
               CType(sender, MedicalViewerCell).Invalidate()
            End If
         End Sub

         Private Sub _medicalViewer_UserActionMouseUp(ByVal sender As Object, ByVal e As MedicalViewerMouseEventArgs)
            _mouseDown = False
         End Sub

         Private Sub _medicalViewer_UserActionMouseDown(ByVal sender As Object, ByVal e As MedicalViewerMouseEventArgs)
            _mouseDown = True
         End Sub

         Private Sub _medicalViewer_UserActionKeyDown(ByVal sender As Object, ByVal e As MedicalViewerKeyEventArgs)
            If (CType(sender, MedicalViewerCell)).Image.PaintGamma > 1 Then
               CType(sender, MedicalViewerCell).Image.PaintGamma -= 1
            End If
         End Sub

         Private Sub _medicalViewer_UserActionKeyUp(ByVal sender As Object, ByVal e As MedicalViewerKeyEventArgs)
            CType(sender, MedicalViewerCell).Invalidate()
         End Sub

         Private Sub _medicalViewer_CustomPaint(ByVal sender As Object, ByVal e As MedicalViewerPaintEventArgs)
            ' draw red ellipse around the first frame of the first cell.
            If (e.CellIndex = 0) AndAlso (e.SubCellIndex = 0) Then
               e.Graphics.DrawEllipse(Pens.Red, e.ClipRectangle)
            End If
         End Sub

         Private Sub _medicalViewer_UserTag(ByVal sender As Object, ByVal e As MedicalViewerUserTagEventArgs)
            ' draw red string at the bottom right edge of the first cell.
            If e.CellIndex = 0 Then
               e.Graphics.DrawString("Owner Draw", New Font(FontFamily.GenericSerif, 15), Brushes.Red, New PointF(e.ClipRectangle.Left, e.ClipRectangle.Top))
            End If
         End Sub

         Public Sub New()
            Dim _codecs As RasterCodecs = New RasterCodecs()
            Dim _image As RasterImage

            ' 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(Me.ClientRectangle.Right, Me.ClientRectangle.Bottom)

            ' Load an image and then add it to the control.
            _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "image3.dcm"))
            Dim cell As MedicalViewerCell = New MedicalViewerCell(_image, True)
            cell.AddAction(CType(101, MedicalViewerActionType))
            cell.SetAction(CType(101, MedicalViewerActionType), MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active Or MedicalViewerActionFlags.RealTime)

            cell.SetActionKeys(CType(101, MedicalViewerActionType), New MedicalViewerKeys(Keys.Up, Keys.Down, Keys.Left, Keys.Right, MedicalViewerModifiers.None))

            AddHandler cell.UserTag, AddressOf _medicalViewer_UserTag
            AddHandler cell.CustomPaint, AddressOf _medicalViewer_CustomPaint
            AddHandler cell.UserActionMouseDown, AddressOf _medicalViewer_UserActionMouseDown
            AddHandler cell.UserActionMouseUp, AddressOf _medicalViewer_UserActionMouseUp
            AddHandler cell.UserActionMouseMove, AddressOf _medicalViewer_UserActionMouseMove
            AddHandler cell.UserActionKeyUp, AddressOf _medicalViewer_UserActionKeyUp
            AddHandler cell.UserActionKeyDown, AddressOf _medicalViewer_UserActionKeyDown

            _medicalViewer.Cells.Add(cell)

            ' adjust some properties to 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
         End Sub
      End Class

   Public NotInheritable Class LEAD_VARS
      Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
   End Class
C#Copy Code
public void MedicalViewerEventsExample()
      {
         MainForm3 form = new MainForm3();
         form.ShowDialog();
      }
#endif
      // 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 | MedicalViewerActionFlags.RealTime);

            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 to 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:\Users\Public\Documents\LEADTOOLS Images";
   }

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also

Leadtools.MedicalViewer requires a Medical Imaging license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features