The BeginUpdate Method is available as an add-on to the LEADTOOLS Medical Imaging toolkits.
Stops the viewer from being refreshed if changes are applied. This is useful to increase the control speed efficiency.Visual Basic (Declaration) | |
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Public Sub BeginUpdate() |
Visual Basic (Usage) | ![]() |
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Dim instance As MedicalViewer instance.BeginUpdate() |
C# | |
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public void BeginUpdate() |
C++/CLI | |
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public: void BeginUpdate(); |
Visual Basic | ![]() |
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Private Class MedicalViewerForm : Inherits Form Private _medicalViewer As MedicalViewer Private applyEffects As Button Private Sub MedicalViewerForm_SizeChanged(ByVal sender As Object, ByVal e As EventArgs) _medicalViewer.Size = New Size(Me.ClientRectangle.Right - 30, Me.ClientRectangle.Bottom) End Sub Public Sub New() Dim _codecs As RasterCodecs = New RasterCodecs() Dim _image As RasterImage AddHandler SizeChanged, AddressOf MedicalViewerForm_SizeChanged ' Create the medical viewer and adjust the size and the location. _medicalViewer = New MedicalViewer(1, 2) _medicalViewer.Location = New Point(30, 0) _medicalViewer.Size = New Size(Me.ClientRectangle.Right - 30, Me.ClientRectangle.Bottom) ' Load an image and then add it to the control. _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "xa.dcm")) Dim cell As MedicalViewerMultiCell = New MedicalViewerMultiCell(_image, True, 1, 1) _medicalViewer.Cells.Add(cell) ' add some action that will be used to change the properties of the images inside the control. cell.AddAction(MedicalViewerActionType.WindowLevel) cell.AddAction(MedicalViewerActionType.Alpha) cell.AddAction(MedicalViewerActionType.Offset) ' assign the added actions to a mouse button, meaning that when the user click and drag the mouse button, the associated action will be activated. cell.SetAction(MedicalViewerActionType.WindowLevel, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active Or MedicalViewerActionFlags.RealTime) cell.SetAction(MedicalViewerActionType.Alpha, MedicalViewerMouseButtons.Middle, MedicalViewerActionFlags.Active Or MedicalViewerActionFlags.RealTime) cell.SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active Or MedicalViewerActionFlags.RealTime) ' adjust some properties to the cell and add some tags. _medicalViewer.Cells(0).SetTag(2, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "EX. ID 230-36-5448") _medicalViewer.Cells(0).SetTag(4, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Frame) _medicalViewer.Cells(0).SetTag(6, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Scale) _medicalViewer.Cells(0).SetTag(2, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.WindowLevelData) _medicalViewer.Cells(0).SetTag(1, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.FieldOfView) ' Load another image and then add it to the control. _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "mr.dcm")) _medicalViewer.Cells.Add(New MedicalViewerMultiCell(_image, True, 2, 2)) ' adjust some properties to the cell and add some tags. _medicalViewer.Cells(1).SetTag(2, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "EX. ID 230-36-5448") _medicalViewer.Cells(1).SetTag(4, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Frame) _medicalViewer.Cells(1).SetTag(6, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Scale) _medicalViewer.Cells(1).SetTag(2, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.WindowLevelData) _medicalViewer.Cells(1).SetTag(1, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.FieldOfView) applyEffects = New Button() applyEffects.Location = New Point(0, 0) applyEffects.Size = New Size(30, 15) applyEffects.Text = "Apply Effects" AddHandler applyEffects.Click, AddressOf applyEffects_Click Controls.Add(_medicalViewer) _medicalViewer.Dock = DockStyle.Fill Controls.Add(applyEffects) End Sub Private Sub applyEffects_Click(ByVal sender As Object, ByVal e As EventArgs) Dim medicalViewer As MedicalViewer = CType(_medicalViewer, MedicalViewer) Dim cell As MedicalViewerMultiCell = CType(medicalViewer.Cells(0), MedicalViewerMultiCell) Dim cell1 As MedicalViewerMultiCell = CType(medicalViewer.Cells(1), MedicalViewerMultiCell) Dim result As DialogResult = MessageBox.Show("This demo will do some effects on the Medical viewer, Do you want to use the begin and update update?", "Begin Update And End Update Demo", MessageBoxButtons.YesNo) If result = DialogResult.Yes Then medicalViewer.BeginUpdate() End If cell.SetTag(8, 0, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 1") cell.SetTag(0, 8, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 2") cell1.SetTag(1, 9, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 3") cell1.SetTag(2, 10, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 4") cell1.SetTag(3, 11, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 5") cell.Rows = 3 cell.Columns = 3 cell.FitImageToCell = False Dim tagInformation As MedicalViewerTagInformation = New MedicalViewerTagInformation() tagInformation.Alignment = MedicalViewerTagAlignment.BottomLeft tagInformation.Position = 3 tagInformation.Text = "Edit Text 1" cell.EditTag(8, 0, MedicalViewerTagAlignment.TopLeft, tagInformation) tagInformation = New MedicalViewerTagInformation() tagInformation.Type = MedicalViewerTagType.Scale cell.EditTag(8, 0, MedicalViewerTagAlignment.BottomLeft, tagInformation) cell.DeleteTag(0, 8, MedicalViewerTagAlignment.TopLeft) ' Shift the second row, one row down tagInformation = cell.GetTag(2, 10, MedicalViewerTagAlignment.TopLeft) tagInformation.Position += 1 cell.EditTag(2, 10, MedicalViewerTagAlignment.TopLeft, tagInformation) ' Shift the second row, one row down tagInformation = cell.GetTag(2, MedicalViewerTagAlignment.TopLeft) tagInformation.Text = "Edited sub-cell Tag1" cell.EditTag(2, MedicalViewerTagAlignment.TopLeft, tagInformation) cell.DeleteTag(4, MedicalViewerTagAlignment.TopLeft) Dim windowLevelProperties As MedicalViewerWindowLevel = CType(cell.GetActionProperties(MedicalViewerActionType.WindowLevel, 0), MedicalViewerWindowLevel) windowLevelProperties.Width = 20 windowLevelProperties.Center = 50 cell.SetActionProperties(MedicalViewerActionType.WindowLevel, windowLevelProperties) Dim scale As Double = cell.GetScale(0) scale *= 2 cell.SetScale(-1, scale) cell1.SetScale(0, scale) Dim scaleMode As MedicalViewerScaleMode = cell.GetScaleMode(0) If scaleMode = MedicalViewerScaleMode.Normal Then scaleMode = MedicalViewerScaleMode.Fit Else scaleMode = MedicalViewerScaleMode.Normal End If cell.SetScaleMode(scaleMode) If result = DialogResult.Yes Then medicalViewer.EndUpdate() End If End Sub Public ReadOnly Property Viewer() As MedicalViewer Get Return _medicalViewer End Get End Property End Class Private Function GetMedicalControl() As MedicalViewerForm Return New MedicalViewerForm() End Function ' This example creates a medical viewer control and two cells. when you click on the button it will ask you whether to apply some effects on the cell with or without using BeginUpdate/EndUpdate. Run this sample twice and see the difference Public Sub MedicalViewerTagInformationExample() Dim myForm As MedicalViewerForm = GetMedicalControl() Dim medicalViewer As MedicalViewer = myForm.Viewer myForm.ShowDialog() End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class |
C# | ![]() |
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class MedicalViewerForm : Form { private MedicalViewer _medicalViewer; private Button applyEffects; void MedicalViewerForm_SizeChanged(object sender, EventArgs e) { _medicalViewer.Size = new Size(this.ClientRectangle.Right - 30, this.ClientRectangle.Bottom); } public MedicalViewerForm() { RasterCodecs _codecs = new RasterCodecs(); RasterImage _image; this.SizeChanged += new EventHandler(MedicalViewerForm_SizeChanged); // Create the medical viewer and adjust the size and the location. _medicalViewer = new MedicalViewer(1, 2); _medicalViewer.Location = new Point(30, 0); _medicalViewer.Size = new Size(this.ClientRectangle.Right - 30, this.ClientRectangle.Bottom); // Load an image and then add it to the control. _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir,"xa.dcm")); MedicalViewerMultiCell cell = new MedicalViewerMultiCell(_image, true, 1, 1); _medicalViewer.Cells.Add(cell); // add some action that will be used to change the properties of the images inside the control. cell.AddAction(MedicalViewerActionType.WindowLevel); cell.AddAction(MedicalViewerActionType.Alpha); cell.AddAction(MedicalViewerActionType.Offset); // assign the added actions to a mouse button, meaning that when the user click and drag the mouse button, the associated action will be activated. cell.SetAction(MedicalViewerActionType.WindowLevel, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active | MedicalViewerActionFlags.RealTime); cell.SetAction(MedicalViewerActionType.Alpha, MedicalViewerMouseButtons.Middle, MedicalViewerActionFlags.Active | MedicalViewerActionFlags.RealTime); cell.SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active | MedicalViewerActionFlags.RealTime); // adjust some properties to the cell and add some tags. _medicalViewer.Cells[0].SetTag(2, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "EX. ID 230-36-5448"); _medicalViewer.Cells[0].SetTag(4, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Frame); _medicalViewer.Cells[0].SetTag(6, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Scale); _medicalViewer.Cells[0].SetTag(2, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.WindowLevelData); _medicalViewer.Cells[0].SetTag(1, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.FieldOfView); // Load another image and then add it to the control. _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir,"mr.dcm")); _medicalViewer.Cells.Add(new MedicalViewerMultiCell(_image, true, 2, 2)); // adjust some properties to the cell and add some tags. _medicalViewer.Cells[1].SetTag(2, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "EX. ID 230-36-5448"); _medicalViewer.Cells[1].SetTag(4, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Frame); _medicalViewer.Cells[1].SetTag(6, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Scale); _medicalViewer.Cells[1].SetTag(2, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.WindowLevelData); _medicalViewer.Cells[1].SetTag(1, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.FieldOfView); applyEffects = new Button(); applyEffects.Location = new Point(0, 0); applyEffects.Size = new Size(30, 15); applyEffects.Text = "Apply Effects"; applyEffects.Click += new EventHandler(applyEffects_Click); Controls.Add(_medicalViewer); _medicalViewer.Dock = DockStyle.Fill; Controls.Add(applyEffects); } void applyEffects_Click(object sender, EventArgs e) { MedicalViewer medicalViewer = (MedicalViewer)_medicalViewer; MedicalViewerMultiCell cell = (MedicalViewerMultiCell)(medicalViewer.Cells[0]); MedicalViewerMultiCell cell1 = (MedicalViewerMultiCell)(medicalViewer.Cells[1]); DialogResult result = MessageBox.Show(@"This demo will do some effects on the Medical viewer, Do you want to use the begin and update update?", "Begin Update And End Update Demo", MessageBoxButtons.YesNo); if (result == DialogResult.Yes) medicalViewer.BeginUpdate(); cell.SetTag( 8, 0, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 1"); cell.SetTag( 0, 8, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 2"); cell1.SetTag( 1, 9, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 3"); cell1.SetTag( 2, 10, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 4"); cell1.SetTag( 3, 11, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "Sub Cell Tag 5"); cell.Rows = 3; cell.Columns = 3; cell.FitImageToCell = false; MedicalViewerTagInformation tagInformation = new MedicalViewerTagInformation(); tagInformation.Alignment = MedicalViewerTagAlignment.BottomLeft; tagInformation.Position = 3; tagInformation.Text = "Edit Text 1"; cell.EditTag(8, 0, MedicalViewerTagAlignment.TopLeft, tagInformation); tagInformation = new MedicalViewerTagInformation(); tagInformation.Type = MedicalViewerTagType.Scale; cell.EditTag(8, 0, MedicalViewerTagAlignment.BottomLeft, tagInformation); cell.DeleteTag(0, 8, MedicalViewerTagAlignment.TopLeft); // Shift the second row, one row down tagInformation = cell.GetTag(2, 10, MedicalViewerTagAlignment.TopLeft); tagInformation.Position += 1; cell.EditTag(2, 10, MedicalViewerTagAlignment.TopLeft, tagInformation); // Shift the second row, one row down tagInformation = cell.GetTag(2, MedicalViewerTagAlignment.TopLeft); tagInformation.Text = "Edited sub-cell Tag1"; cell.EditTag(2, MedicalViewerTagAlignment.TopLeft, tagInformation); cell.DeleteTag(4, MedicalViewerTagAlignment.TopLeft); MedicalViewerWindowLevel windowLevelProperties = (MedicalViewerWindowLevel)cell.GetActionProperties(MedicalViewerActionType.WindowLevel, 0); windowLevelProperties.Width = 20; windowLevelProperties.Center = 50; cell.SetActionProperties(MedicalViewerActionType.WindowLevel, windowLevelProperties); double scale = cell.GetScale(0); scale *= 2; cell.SetScale(-1, scale); cell1.SetScale(0, scale); MedicalViewerScaleMode scaleMode = cell.GetScaleMode(0); if (scaleMode == MedicalViewerScaleMode.Normal) scaleMode = MedicalViewerScaleMode.Fit; else scaleMode = MedicalViewerScaleMode.Normal; cell.SetScaleMode(scaleMode); if (result == DialogResult.Yes) medicalViewer.EndUpdate(); } public MedicalViewer Viewer { get { return _medicalViewer; } } } MedicalViewerForm GetMedicalControl() { return new MedicalViewerForm(); } // This example creates a medical viewer control and two cells. when you click on the button it will ask you whether to apply some effects on the cell with or without using BeginUpdate/EndUpdate. Run this sample twice and see the difference public void MedicalViewerTagInformationExample() { MedicalViewerForm myForm = GetMedicalControl(); MedicalViewer medicalViewer = myForm.Viewer; myForm.ShowDialog(); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; } |
This method will cause the viewer not to repaint if changes are applied. When the user calls the EndUpdate method, the viewer will repaint to show all the changes made. This is useful for better visual results and for speed efficiency.
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7