CustomPaint Event

Summary
Optional delegate method for additional processing.
Syntax
C#
VB
C++
public event EventHandler<MedicalViewerPaintEventArgs> CustomPaint 
  
Public Event CustomPaint As EventHandler(Of MedicalViewerPaintEventArgs) 
            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

C#
VB
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:\LEADTOOLS21\Resources\Images"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.MedicalViewer 
 
Public Sub MedicalViewerEventsExample() 
   Dim form As MainForm3 = New MainForm3() 
   form.ShowDialog() 
End Sub 
 
' 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 a 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) 
 
      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 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 
   End Sub 
End Class 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class
Requirements

Target Platforms

Help Version 21.0.2021.6.30
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Leadtools.MedicalViewer Assembly
Introduction
Getting Started
Namespaces
Leadtools.MedicalViewer Namespace
Assemblies
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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.