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<< Click to Display Table of Contents >> Navigation: Tasks > Internal Actions > Add link annotations |
Link annotations can be created using the DrawAnnotAny action by specifying the PDF properties which should be created in the PDF file.
Example - add a link to a webpage
procedure TForm1.AddWeblink1Click(Sender: TObject);
var s : string;
begin
s := 'http://www.wpcubed.com';
if (pdf<>nil) and InputQuery('Add weblink', 'URL', s) then
begin
pdf.CommandStrEx( COMPDF_ACTION,
'DrawAnnotAny="type=Link","prp.i.F=4","prp.a.Border=0 0 0",' +
'"prp.A.n.Type=Action","prp.A.n.S=URI","prp.A.s.URI=' + s + '"', 0);
end;
end;
Example - add a link to page
In this example the page is provided as number, rage 1..pagecount
procedure TForm1.Addlinktopage1Click(Sender: TObject);
var s : string;
i : Integer;
begin
s := IntToStr(pdf.Page);
if (pdf<>nil) and InputQuery('Add link to page', 'Nr', s) then
begin
i := StrToInt(s);
if (i<1) or (i>pdf.PageCount) then
ShowMessage('Pagenumber not valid')
else
begin
// this code uses the page number directly.
pdf.CommandStrEx( COMPDF_ACTION,
'DrawAnnotAny="type=Link","prp.i.F=4","prp.a.Border=0 0 0",' +
'"prp.r.Dest=[#' + IntToStr(i) + ' /XYZ 0 500]"', 0);
end;
end;
end;
In this example the page number is stored as ID. The command COMPDF_GetGetPageObjectID (226) is used to retrieve the page id.
Note: The ID is enclosed in { }.
procedure TForm1.Addlinktopage1Click(Sender: TObject);
var s : string;
i : Integer;
begin
s := IntToStr(pdf.Page);
if (pdf<>nil) and InputQuery('Add link to page', 'Nr', s) then
begin
i := StrToInt(s);
if (i<1) or (i>pdf.PageCount) then
ShowMessage('Pagenumber not valid')
else
begin
// In the code below we use the page identifier
pdf.CommandStrEx( COMPDF_ACTION,
'DrawAnnotAny="type=Link","prp.a.Border=0 0 0","prp.i.F=4","prp.r.Dest=[#' +
pdf.CommandGetStr(COMPDF_GetGetPageObjectID, '', i-1)
+ ' /XYZ 0 500]"', 0);
end;
end;
end;