AddFreeHandAnnot Method (AnnotationManager)

In This Topic

Adds a new GdPicture/XMP freehand annotation on the selected page of the document currently handled by this AnnotationManager object according to the parameters you have specified. A freehand annotation is a drawn line consisting of several connected line segments.

The type of the newly added annotation object is GdPictureAnnotationType.AnnotationTypeFreeHand. You can change the annotation properties directly using the GdPicture14.Annotations.AnnotationFreeHand class right after the successful creation of the annotation object.

Be aware that annotations are always treated relative to the currently selected page.

Adds a new GdPicture/XMP freehand annotation on the selected page of the document currently handled by this AnnotationManager object.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration

 

Public Function AddFreeHandAnnot( _

   ByVal BorderColor As GdPictureColor, _

   ByVal Points() As GdPicturePointF _

) As AnnotationFreeHand

public AnnotationFreeHand AddFreeHandAnnot( 

   GdPictureColor BorderColor,

   GdPicturePointF[] Points

)

public function AddFreeHandAnnot( 

    BorderColor: GdPictureColor;

    Points: GdPicturePointFarray of

): AnnotationFreeHand;

public function AddFreeHandAnnot( 

   BorderColor : GdPictureColor,

   Points : GdPicturePointF[]

) : AnnotationFreeHand;

public: AnnotationFreeHand* AddFreeHandAnnot( 

   GdPictureColor BorderColor,

   GdPicturePointF[]* Points

)

public:

AnnotationFreeHand^ AddFreeHandAnnot( 

   GdPictureColor BorderColor,

   array<GdPicturePointF>^ Points

)

Parameters

BorderColor: A color object that defines the required color of the newly added freehand annotation. It corresponds to the AnnotationFreeHand.StrokeColor property.
Points: An array of points, in inches, which determines the line segments to be connected.

Return Value

A GdPicture/XMP AnnotationFreeHand object. The newly added GdPicture/XMP freehand annotation.

Remarks

Please ensure that you have selected the proper page before starting any annotation related action with the handled document. Annotations are always treated relative to the currently selected page.

You can regularly apply the AnnotationManager.GetStat method to determine if this method has been successful.

Example

How to add a freehand annotation to a newly created image.

VB.NET
C#

Dim status As GdPictureStatus = GdPictureStatus.OK

Using image As GdPictureImaging = New GdPictureImaging()

    Dim imageID As Integer = image.CreateNewGdPictureImage(1000, 1600, CShort(32), Color.White)

    status = image.GetStat()

    If (status = GdPictureStatus.OK) AndAlso (imageID <> 0) Then

        Using annotMgr As AnnotationManager = New AnnotationManager()

            If (annotMgr.InitFromGdPictureImage(imageID) = GdPictureStatus.OK) AndAlso

               (annotMgr.SelectPage(1) = GdPictureStatus.OK) Then

                Dim px As Single = 5, py As Single = 1, dx As Single = 2, dy As Single = 2

                Dim points1 As PointF() = New PointF(4) {New PointF(px, py), New PointF(px + dx, py), New PointF(px + dx / 2, py + dy / 2),

                                                          New PointF(px + 3 * dx / 2, py + dy), New PointF(px - dx, py + dy)}

                Dim annot As GdPicture14.Annotations.AnnotationFreeHand = annotMgr.AddFreeHandAnnot(Color.SteelBlue, points1)

                If (annotMgr.GetStat() = GdPictureStatus.OK) AndAlso (annot IsNot Nothing) Then

                    annot.Author = "GdPicture"

                    annot.BorderWidth = 0.1F

                    annot.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash

                    annot.Opacity = 0.5F

                End If

                annot.Dispose()

                If annotMgr.SaveAnnotationsToPage() = GdPictureStatus.OK Then

                    annotMgr.SaveDocumentToJPEG("freehand.jpeg", 75)

                End If

            End If

            status = annotMgr.GetStat()

            annotMgr.Close()

        End Using

        image.ReleaseGdPictureImage(imageID)

    End If

End Using

'We assume that the GdViewer1 control has been integrated into your application.

If status = GdPictureStatus.OK Then

    GdViewer1.DisplayFromFile("freehand.jpeg")

Else

    MessageBox.Show("Error!   Status: " + status.ToString(), "AnnotationManager.AddFreeHandAnnot")

End If

GdPictureStatus status = GdPictureStatus.OK;

using (GdPictureImaging image = new GdPictureImaging())

{

    int imageID = image.CreateNewGdPictureImage(1000, 1600, 32, Color.White);

    status = image.GetStat();

    if ((status == GdPictureStatus.OK) && (imageID != 0))

    {

        using (AnnotationManager annotMgr = new AnnotationManager())

        {

            if ((annotMgr.InitFromGdPictureImage(imageID) == GdPictureStatus.OK) &&

                (annotMgr.SelectPage(1) == GdPictureStatus.OK))

            {

                float px = 5, py = 1, dx = 2, dy = 2;

                PointF[] points1 = new PointF[5] { new PointF(px, py), new PointF(px+dx, py), new PointF(px+dx/2, py+dy/2),

                                                   new PointF(px+3*dx/2, py+dy), new PointF(px-dx, py+dy) };

                GdPicture14.Annotations.AnnotationFreeHand annot = annotMgr.AddFreeHandAnnot(Color.SteelBlue, points1);

                if ((annotMgr.GetStat() == GdPictureStatus.OK) && (annot != null))

                {

                    annot.Author = "GdPicture";

                    annot.BorderWidth = 0.1f;

                    annot.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;

                    annot.Opacity = 0.5f;

                }

                annot.Dispose();

                if (annotMgr.SaveAnnotationsToPage() == GdPictureStatus.OK)

                    annotMgr.SaveDocumentToJPEG("freehand.jpeg", 75);

            }

            status = annotMgr.GetStat();

            annotMgr.Close();

        }

        image.ReleaseGdPictureImage(imageID);

    }

}

//We assume that the GdViewer1 control has been integrated into your application.

if (status == GdPictureStatus.OK)

    GdViewer1.DisplayFromFile("freehand.jpeg");

else

    MessageBox.Show("Error!   Status: " + status.ToString(), "AnnotationManager.AddFreeHandAnnot");

Reference

AnnotationManager Class
AnnotationManager Members
SelectPage Method
SaveAnnotationsToPage Method
GetAnnotationCount Method
GetAnnotationIdx Method
GetAnnotationType Method
DeleteAnnotation Method