DesignerGlyph Class

Definition

public ref class DesignerGlyph abstract

public abstract class DesignerGlyph

[System.Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
public abstract class DesignerGlyph

type DesignerGlyph = class

[<System.Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")>]
type DesignerGlyph = class

Public MustInherit Class DesignerGlyph

Inheritance

Object

DesignerGlyph

Derived

System.Workflow.ComponentModel.Design.CommentGlyph

System.Workflow.ComponentModel.Design.ConfigErrorGlyph

System.Workflow.ComponentModel.Design.LockedActivityGlyph

System.Workflow.ComponentModel.Design.ReadOnlyActivityGlyph

System.Workflow.ComponentModel.Design.SelectionGlyph

More…

Attributes

ObsoleteAttribute

Examples

The following code example demonstrates a glyph class that derives from the DesignerGlyph class. The code overrides the GetBounds and OnPaint methods.

This code example is part of the Workflow Monitor SDK Sample from the DesignerGlyphProvider.cs file. For more information, see Workflow Monitor.

//Define a glyph to show an activity is executing, i.e. not 'closed'
internal sealed class ExecutingGlyph : DesignerGlyph
{
    internal ExecutingGlyph()
    {
    }

    public override Rectangle GetBounds(ActivityDesigner designer, bool activated)
    {
        Rectangle imageBounds = Rectangle.Empty;
        Image image = Resources.Executing;
        if (image != null)
        {
            Size glyphSize = WorkflowTheme.CurrentTheme.AmbientTheme.GlyphSize;
            imageBounds.Location = new Point(designer.Bounds.Right - glyphSize.Width / 2, designer.Bounds.Top - glyphSize.Height / 2);
            imageBounds.Size = glyphSize;
        }
        return imageBounds;
    }

    protected override void OnPaint(Graphics graphics, bool activated, AmbientTheme ambientTheme, ActivityDesigner designer)
    {
        Bitmap bitmap = Resources.Executing;
        bitmap.MakeTransparent(Color.FromArgb(0, 255, 255));
        if (bitmap != null)
            graphics.DrawImage(bitmap, GetBounds(designer, activated), new Rectangle(Point.Empty, bitmap.Size), GraphicsUnit.Pixel);
    }
}

'Define a glyph to show an activity is executing, i.e. not 'closed'
Friend Class ExecutingGlyph
    Inherits DesignerGlyph
    Public Overrides Function GetBounds(ByVal designer As System.Workflow.ComponentModel.Design.ActivityDesigner, ByVal activated As Boolean) As System.Drawing.Rectangle
        Dim imageBounds As Rectangle = Rectangle.Empty
        Dim image As Image = AppResources.Executing
        If Not image Is Nothing Then
            Dim glyphSize As Size = WorkflowTheme.CurrentTheme.AmbientTheme.GlyphSize
            imageBounds.Location = New Point(designer.Bounds.Right - glyphSize.Width / 2, designer.Bounds.Top - glyphSize.Height / 2)
            imageBounds.Size = glyphSize
        End If
        Return imageBounds
    End Function

    Protected Overrides Sub OnPaint(ByVal graphics As System.Drawing.Graphics, ByVal activated As Boolean, ByVal ambientTheme As System.Workflow.ComponentModel.Design.AmbientTheme, ByVal designer As System.Workflow.ComponentModel.Design.ActivityDesigner)
        Dim bitmap As Bitmap = AppResources.Executing
        bitmap.MakeTransparent(Color.FromArgb(0, 255, 255))

        If Not bitmap Is Nothing Then
            graphics.DrawImage(bitmap, GetBounds(designer, activated), New Rectangle(Point.Empty, bitmap.Size), GraphicsUnit.Pixel)
        End If
    End Sub
End Class

Remarks

The DesignerGlyph class is the base class for all designer glyphs used on a workflow design surface.

Activity designer developers can use classes that inherit from DesignerGlyph to draw custom glyphs onto the surface of an ActivityDesigner. DesignerGlyph classes draw such glyphs at the top-level Z order, which places the custom glyph visually on top of all other glyphs on the designer based on the Priority value of the custom glyph. A lower value for the Priority property indicates a higher priority and therefore draws the glyph at the top-most Z order position on an activity designer.

Notes to Implementers

When you inherit from DesignerGlyph, you must override the following members: OnPaint(Graphics, Boolean, AmbientTheme, ActivityDesigner).

Constructors

Fields

Properties

Methods

Applies to

See also

• Workflow Monitor