GetFormFieldFontSize(Int32,Int32) Method

In This Topic

Returns the size, in points, used to display the checkmark in a required form field, here a child radio button in a group. The radio button group is specified by its unique form field's identifier and it is related to the currently loaded PDF document. As said, this method is only applicable to radio buttons.

The font size attribute is not restricted to any form fields, meaning that this value also defines the size of the checkmark in the radio button field. Please note that every single child radio button in a group of radio buttons within a radio button field can have its own font attributes as well.

For further assistance, please refer to the PDF Reference, Section "Interactive Forms".

Syntax

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

'Declaration
 
Public Overloads Function GetFormFieldFontSize( _
   ByVal FieldId As Integer, _
   ByVal ChildIdx As Integer _
) As Single

public float GetFormFieldFontSize( 
   int FieldId,
   int ChildIdx
)

public function GetFormFieldFontSize( 
    FieldId: Integer;
    ChildIdx: Integer
): Single;

public function GetFormFieldFontSize( 
   FieldId : int,
   ChildIdx : int
) : float;

public: float GetFormFieldFontSize( 
   int FieldId,
   int ChildIdx
)

public:
float GetFormFieldFontSize( 
   int FieldId,
   int ChildIdx
)

Parameters

FieldId: A unique form field identifier specifying a required form field object. You can obtain this identifier using these methods: AddRadioButtonFormField(Single,Single,Single,Single,String,String,PdfCheckBoxStyle,Byte,Byte,Byte), GetFormFieldId or GetFormFieldChildID.
ChildIdx: The index of the required child radio button in a group. It must be a value from 0 to GetFormFieldChildCount-1.
It is simply a sequence index of a radio button in a group, it does not correspond to the unique form field's identifier.

Return Value

The size of the displayed checkmark, in points, of the specified child radio button. The GetStat method can be subsequently used to determine if this method has been successful.

Remarks

This method is only allowed for use with non-encrypted documents. At the same, this method is only meaningful for radio buttons, otherwise it will fail.

It is recommend to use the GetStat method to identify the specific reason for the method's failure, if any.

Just to inform you, that the attributes representing the font and its resources are defined for all form field objects by default. For further assistance, please refer to the PDF Reference, Section "Interactive Forms".

Likewise, only to remind you, that 1 point = 1/72 inch.

Example

How to find out the correct font size defined for radio button fields.

VB.NET
C#

Dim caption As String = "Example: GetFormFieldFontSize"
Dim gdpicturePDF As GdPicturePDF = New GdPicturePDF()
If gdpicturePDF.LoadFromFile("forms.pdf", False) = GdPictureStatus.OK Then
    Dim count As Integer = gdpicturePDF.GetFormFieldsCount()
    If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
        Dim message As String = "", ftitle As String = ""
        Dim formID As Integer = 0, kids As Integer = 0
        Dim hasRB As Boolean = False
        Dim fsize As Single = 0
        Dim type As PdfFormFieldType = PdfFormFieldType.PdfFormFieldTypeUnknown
        For i As Integer = 0 To count - 1
            formID = gdpicturePDF.GetFormFieldId(i)
            If gdpicturePDF.GetStat() <> GdPictureStatus.OK Then
                message = (i + 1).ToString() + ".form field - GetFormFieldId() finished with the status: "
                Exit For
            End If
            type = gdpicturePDF.GetFormFieldType(formID)
            If gdpicturePDF.GetStat() <> GdPictureStatus.OK Then
                message = (i + 1).ToString() + ".form field - GetFormFieldType() finished with the status: "
                Exit For
            End If
            If type = PdfFormFieldType.PdfFormFieldTypeRadioButton Then
                hasRB = True
                ftitle = gdpicturePDF.GetFormFieldTitle(formID)
                If gdpicturePDF.GetStat() <> GdPictureStatus.OK Then
                    message = (i + 1).ToString() + ".form field - GetFormFieldTitle() finished with the status: "
                    Exit For
                End If
                fsize = gdpicturePDF.GetFormFieldFontSize(formID)
                If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
                    'The font size is same for all child radio buttons in the given group.
                    message = message + ftitle + " radio button - font size is " + fsize.ToString() + " - same for all children." + vbCrLf
                Else
                    If gdpicturePDF.GetStat() = GdPictureStatus.Aborted Then
                        'The font size is different for individual child radio buttons in the given group.
                        kids = gdpicturePDF.GetFormFieldChildCount(formID)
                        If gdpicturePDF.GetStat() <> GdPictureStatus.OK Then
                            message = "The radio button " + ftitle + " - GetFormFieldChildCount() finished with the status: "
                            Exit For
                        End If
                        message = message + ftitle + " radio button - font size is different for child buttons." + vbCrLf
                        For j As Integer = 0 To kids - 1
                            fsize = gdpicturePDF.GetFormFieldFontSize(formID, j)
                            If gdpicturePDF.GetStat() <> GdPictureStatus.OK Then
                                message = (j + 1).ToString() + ".child of " + ftitle + " - GetFormFieldFontSize() finished with the status: "
                                Exit For
                            End If
                            message = message + "  " + (j + 1).ToString() + ".child - font size: " + fsize.ToString() + vbCrLf
                        Next
                        If gdpicturePDF.GetStat() <> GdPictureStatus.OK Then Exit For
                    Else
                        'This is an error in getting the font size.
                        message = "The radio button " + ftitle + " - GetFormFieldFontSize() finished with the status: " + gdpicturePDF.GetStat()
                        Exit For
                    End If
                End If
            End If
        Next
        If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
            If count = 0 Then
                message = "This file doesn't include forms."
            ElseIf Not hasRB Then
                message = "This file doesn't include radio button form fields."
            End If
        Else
            message = message + gdpicturePDF.GetStat().ToString()
        End If
        MessageBox.Show(message, caption)
    Else
        MessageBox.Show("The GetFormFieldsCount() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
    End If
Else
    MessageBox.Show("The file can't be loaded.", caption)
End If
gdpicturePDF.Dispose()

string caption = "Example: GetFormFieldFontSize";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if (gdpicturePDF.LoadFromFile("forms.pdf", false) == GdPictureStatus.OK)
{
    int count = gdpicturePDF.GetFormFieldsCount();
    if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
    {
        string message = "", ftitle = "";
        int formID = 0, kids = 0;
        bool hasRB = false;
        float fsize = 0;
        PdfFormFieldType type = PdfFormFieldType.PdfFormFieldTypeUnknown;
        for (int i = 0; i < count; i++)
        {
            formID = gdpicturePDF.GetFormFieldId(i);
            if (gdpicturePDF.GetStat() != GdPictureStatus.OK)
            {
                message = (i + 1).ToString() + ".form field - GetFormFieldId() finished with the status: ";
                break;
            }
            type = gdpicturePDF.GetFormFieldType(formID);
            if (gdpicturePDF.GetStat() != GdPictureStatus.OK)
            {
                message = (i + 1).ToString() + ".form field - GetFormFieldType() finished with the status: ";
                break;
            }
            if (type == PdfFormFieldType.PdfFormFieldTypeRadioButton)
            {
                hasRB = true;
                ftitle = gdpicturePDF.GetFormFieldTitle(formID);
                if (gdpicturePDF.GetStat() != GdPictureStatus.OK)
                {
                    message = (i + 1).ToString() + ".form field - GetFormFieldTitle() finished with the status: ";
                    break;
                }
                fsize = gdpicturePDF.GetFormFieldFontSize(formID);
                if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
                {
                    //The font size is same for all child radio buttons in the given group.
                    message = message + ftitle + " radio button - font size is " + fsize.ToString() + " - same for all children.\n";
                }
                else
                {
                    if (gdpicturePDF.GetStat() == GdPictureStatus.Aborted)
                    {
                        //The font size is different for individual child radio buttons in the given group.
                        kids = gdpicturePDF.GetFormFieldChildCount(formID);
                        if (gdpicturePDF.GetStat() != GdPictureStatus.OK)
                        {
                            message = "The radio button " + ftitle + " - GetFormFieldChildCount() finished with the status: ";
                            break;
                        }
                        message = message + ftitle + " radio button - font size is different for child buttons.\n";
                        for (int j = 0; j < kids; j++)
                        {
                            fsize = gdpicturePDF.GetFormFieldFontSize(formID, j);
                            if (gdpicturePDF.GetStat() != GdPictureStatus.OK)
                            {
                                message = (j + 1).ToString() + ".child of " + ftitle + " - GetFormFieldFontSize() finished with the status: ";
                                break;
                            }
                            message = message + "  " + (j + 1).ToString() + ".child - font size: " + fsize.ToString() + "\n";
                        }
                        if (gdpicturePDF.GetStat() != GdPictureStatus.OK) break;
                    }
                    else
                    {
                        //This is an error in getting the font size.
                        message = "The radio button " + ftitle + " - GetFormFieldFontSize() finished with the status: " + gdpicturePDF.GetStat();
                        break;
                    }
                }
            }
        }
        if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
        {
            if (count == 0) message = "This file doesn't include forms.";
            else if (!hasRB) message = "This file doesn't include radio button form fields.";
        }
        else message = message + gdpicturePDF.GetStat().ToString();
        MessageBox.Show(message, caption);
    }
    else
        MessageBox.Show("The GetFormFieldsCount() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
}
else
    MessageBox.Show("The file can't be loaded.", caption);
gdpicturePDF.Dispose();

Reference

GdPicturePDF Class
GdPicturePDF Members
Overload List
SetFormFieldFontSize(Int32,Int32,Single) Method
GetFormFieldsCount Method
GetFormFieldId Method
GetFormFieldChildID Method
GetFormFieldType Method
GetFormFieldFontProperties Method
GetFormFieldFontColor(Int32,Int32) Method
GetFormFieldFontName Method