DesignerGlyph.OnActivate(ActivityDesigner) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Indicates to the glyph that an action has been performed which has activated the glyph.
protected:
virtual void OnActivate(System::Workflow::ComponentModel::Design::ActivityDesigner ^ designer);
protected virtual void OnActivate (System.Workflow.ComponentModel.Design.ActivityDesigner designer);
abstract member OnActivate : System.Workflow.ComponentModel.Design.ActivityDesigner -> unit
override this.OnActivate : System.Workflow.ComponentModel.Design.ActivityDesigner -> unit
Protected Overridable Sub OnActivate (designer As ActivityDesigner)
Parameters
- designer
- ActivityDesigner
The ActivityDesigner on which the glyph is drawn.
Examples
The following example demonstrates an implementation of the OnActivate method. This example is from the Tracking Profile Designer SDK sample. For more information, see Tracking Profile Designer Sample.
/// <summary>
/// This glyph shows that the activity's track point is not correctly configured
/// </summary>
internal sealed class ErrorActivityGlyph : DesignerGlyph
{
static Bitmap image = Resources.error;
string errorMessage;
internal ErrorActivityGlyph(string errorMessage)
{
this.errorMessage = errorMessage;
}
public override bool CanBeActivated
{
get
{
return true;
}
}
/// <summary>
/// Display an error message when this glyph is clicked
/// </summary>
/// <param name="designer"></param>
protected override void OnActivate(ActivityDesigner designer)
{
MessageBox.Show(errorMessage);
}
public override Rectangle GetBounds(ActivityDesigner designer, bool activated)
{
Rectangle imageBounds = new Rectangle();
if (image != null)
{
imageBounds.Size = image.Size;
imageBounds.Location = new Point(designer.Bounds.Right - imageBounds.Size.Width / 4, designer.Bounds.Top - imageBounds.Size.Height / 2);
}
return imageBounds;
}
protected override void OnPaint(Graphics graphics, bool activated, AmbientTheme ambientTheme, ActivityDesigner designer)
{
image.MakeTransparent(Color.FromArgb(255, 255, 255));
if (image != null)
{
graphics.DrawImage(image, GetBounds(designer, activated), new Rectangle(Point.Empty, image.Size), GraphicsUnit.Pixel);
}
}
}
' This glyph shows that the activity's track point is not correctly configured
Friend NotInheritable Class ErrorActivityGlyph
Inherits DesignerGlyph
Shared image As Bitmap = Resources.errorIcon
Dim errorMessage As String
Friend Sub New(ByVal errorMessage As String)
Me.errorMessage = errorMessage
End Sub
Public Overrides ReadOnly Property CanBeActivated() As Boolean
Get
Return True
End Get
End Property
' Display an error message when this glyph is clicked
Protected Overrides Sub OnActivate(ByVal designer As ActivityDesigner)
MessageBox.Show(errorMessage)
End Sub
Public Overrides Function GetBounds(ByVal designer As ActivityDesigner, ByVal activated As Boolean) As Rectangle
Dim imageBounds As New Rectangle()
If image IsNot Nothing Then
imageBounds.Size = image.Size
imageBounds.Location = New Point(designer.Bounds.Right - imageBounds.Size.Width / 4, designer.Bounds.Top - imageBounds.Size.Height / 2)
End If
Return imageBounds
End Function
Protected Overrides Sub OnPaint(ByVal graphics As Graphics, ByVal activated As Boolean, ByVal ambientTheme As AmbientTheme, ByVal designer As ActivityDesigner)
image.MakeTransparent(Color.FromArgb(255, 255, 255))
If image IsNot Nothing Then
graphics.DrawImage(image, GetBounds(designer, activated), New Rectangle(Point.Empty, image.Size), GraphicsUnit.Pixel)
End If
End Sub
End Class
Applies to
GitHub에서 Microsoft와 공동 작업
이 콘텐츠의 원본은 GitHub에서 찾을 수 있으며, 여기서 문제와 끌어오기 요청을 만들고 검토할 수도 있습니다. 자세한 내용은 참여자 가이드를 참조하세요.
.NET
피드백
https://aka.ms/ContentUserFeedback
출시 예정: 2024년 내내 콘텐츠에 대한 피드백 메커니즘으로 GitHub 문제를 단계적으로 폐지하고 이를 새로운 피드백 시스템으로 바꿀 예정입니다. 자세한 내용은 다음을 참조하세요.다음에 대한 사용자 의견 제출 및 보기