SetTextScaling Method (GdPicturePDF)

In This Topic

Sets the horizontal scaling to be used when drawing text onto the currently loaded PDF document. This value adjusts the width of glyphs by stretching or compressing them in the horizontal direction. It is specified as a percentage of the normal width of the glyphs. The initial value is set to 100 (the normal width).

The horizontal scaling parameter is one of the text state parameters, that only affect text. The text state parameters are initialized to their default values at the beginning of each page (see PDF Reference, Section "Text State Parameters and Operators").

Syntax

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

'Declaration
 
Public Function SetTextScaling( _
   ByVal Scaling As Single _
) As GdPictureStatus

public GdPictureStatus SetTextScaling( 
   float Scaling
)

public function SetTextScaling( 
    Scaling: Single
): GdPictureStatus;

public function SetTextScaling( 
   Scaling : float
) : GdPictureStatus;

public: GdPictureStatus SetTextScaling( 
   float Scaling
)

public:
GdPictureStatus SetTextScaling( 
   float Scaling
)

Parameters

Scaling: A new value for the horizontal scaling, as a percentage of the normal width. Initial value is 100.
This value is defined for use with any font you choose.

Return Value

A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK.

We strongly recommend always checking this status first.

Remarks

This method is only allowed for use with non-encrypted documents.

As being noticed above, be aware that the text state parameters are initialized to their default values at the beginning of each page.

Example

How to reset the horizontal scaling in the PDF document in order to be able to draw text using this parameter.

VB.NET
C#

Dim caption As String = "Example: SetTextScaling"
Dim gdpicturePDF As New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.NewPDF()
If status = GdPictureStatus.OK Then
    If gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) = GdPictureStatus.OK Then
        Dim fontName As String = gdpicturePDF.AddStandardFont(PdfStandardFont.PdfStandardFontHelvetica)
        If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
            If (gdpicturePDF.SetTextSize(30) = GdPictureStatus.OK) AndAlso
               (gdpicturePDF.DrawText(fontName, 100, 700, "Hello world!") = GdPictureStatus.OK) AndAlso
               (gdpicturePDF.SetTextScaling(50) = GdPictureStatus.OK) AndAlso
               (gdpicturePDF.DrawText(fontName, 100, 600, "Hello world!") = GdPictureStatus.OK) AndAlso
               (gdpicturePDF.SetTextScaling(150) = GdPictureStatus.OK) AndAlso
               (gdpicturePDF.DrawText(fontName, 100, 500, "Hello world!") = GdPictureStatus.OK) AndAlso
               (gdpicturePDF.SetTextScaling(100) = GdPictureStatus.OK) Then 'Resetting to the initial value.
                status = gdpicturePDF.SaveToFile("test_SetTextScaling.pdf")
                If status = GdPictureStatus.OK Then
                    MessageBox.Show("The text has been successfully drawn and the file has been saved.", caption)
                Else
                    MessageBox.Show("The text has been successfully drawn," + vbCrLf + "but the file can't be saved. Status: " + status.ToString(), caption)
                End If
            Else
                MessageBox.Show("The example has not been followed successfully." + vbCrLf + "The last known status is " + gdpicturePDF.GetStat().ToString(), caption)
            End If
        Else
            MessageBox.Show("The AddStandardFont() method has failed with the status: " + status.ToString(), caption)
        End If
    Else
        MessageBox.Show("The NewPage() method has failed with the status: " + status.ToString(), caption)
    End If
Else
    MessageBox.Show("The NewPDF() method has failed with the status: " + status.ToString(), caption)
End If
gdpicturePDF.Dispose()

string caption = "Example: SetTextScaling";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.NewPDF();
if (status == GdPictureStatus.OK)
{
    if (gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) == GdPictureStatus.OK)
    {
        string fontName = gdpicturePDF.AddStandardFont(PdfStandardFont.PdfStandardFontHelvetica);
        if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
        {
            if ((gdpicturePDF.SetTextSize(30) == GdPictureStatus.OK) &&
                (gdpicturePDF.DrawText(fontName, 100, 700, "Hello world!") == GdPictureStatus.OK) &&
                (gdpicturePDF.SetTextScaling(50) == GdPictureStatus.OK) &&
                (gdpicturePDF.DrawText(fontName, 100, 600, "Hello world!") == GdPictureStatus.OK) &&
                (gdpicturePDF.SetTextScaling(150) == GdPictureStatus.OK) &&
                (gdpicturePDF.DrawText(fontName, 100, 500, "Hello world!") == GdPictureStatus.OK) &&
                (gdpicturePDF.SetTextScaling(100) == GdPictureStatus.OK)) //Resetting to the initial value.
            {
                status = gdpicturePDF.SaveToFile("test_SetTextScaling.pdf");
                if (status == GdPictureStatus.OK)
                    MessageBox.Show("The text has been successfully drawn and the file has been saved.", caption);
                else
                    MessageBox.Show("The text has been successfully drawn,\nbut the file can't be saved. Status: " + status.ToString(), caption);
            }
            else
                MessageBox.Show("The example has not been followed successfully.\nThe last known status is " + gdpicturePDF.GetStat().ToString(), caption);
        }
        else
            MessageBox.Show("The AddStandardFont() method has failed with the status: " + status.ToString(), caption);
    }
    else
        MessageBox.Show("The NewPage() method has failed with the status: " + status.ToString(), caption);
}
else
    MessageBox.Show("The NewPDF() method has failed with the status: " + status.ToString(), caption);
gdpicturePDF.Dispose();

Reference

GdPicturePDF Class
GdPicturePDF Members
DrawText Method
AddStandardFont Method
AddTrueTypeFont Method
SetTextSize Method