Delphi ActiveX Requires Chilkat v11.7.0+

QR Codes for Email, Phone, SMS and Location

See more QR Code Examples

Demonstrates QR codes that start an action on a phone. A QR code only holds text, and what happens on scanning depends on the form of that text: mailto: starts an email, tel: dials a number, SMSTO: starts a text message, and geo: opens a map at a latitude and longitude. A web address opens in the browser. Delphi ActiveX

var
success: Integer;
fmt: TChilkatFormats;
json: TChilkatJsonObject;
jsonOut: TChilkatJsonObject;

begin
success := 0;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

fmt := TChilkatFormats.Create(Self);
json := TChilkatJsonObject.Create(Self);
jsonOut := TChilkatJsonObject.Create(Self);
json.UpdateInt('render.moduleSize',6);
json.UpdateBool('output.overwrite',1);
json.UpdateString('output.return','none');

//  An email, with the address and optionally a subject.  Spaces in the subject are written %20.
json.UpdateString('payload.text','mailto:support@example.com?subject=Order%2012345');
json.UpdateString('output.path','qa_output/qr_email.png');
success := fmt.QrCode('generate',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(fmt.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('email: version ' + IntToStr(jsonOut.IntOf('symbols[0].selectedEncoding.version')) + ', ' + jsonOut.StringOf('outputs[0].path'));

//  

//  A phone number to dial, in international form.
json.UpdateString('payload.text','tel:+15555550100');
json.UpdateString('output.path','qa_output/qr_phone.png');
success := fmt.QrCode('generate',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(fmt.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('phone: version ' + IntToStr(jsonOut.IntOf('symbols[0].selectedEncoding.version')) + ', ' + jsonOut.StringOf('outputs[0].path'));

//  

//  A text message: the number, then the message.
json.UpdateString('payload.text','SMSTO:+15555550100:Please call me back');
json.UpdateString('output.path','qa_output/qr_sms.png');
success := fmt.QrCode('generate',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(fmt.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('sms: version ' + IntToStr(jsonOut.IntOf('symbols[0].selectedEncoding.version')) + ', ' + jsonOut.StringOf('outputs[0].path'));

//  

//  A location: latitude, then longitude, in degrees.
json.UpdateString('payload.text','geo:41.8781,-87.6298');
json.UpdateString('output.path','qa_output/qr_location.png');
success := fmt.QrCode('generate',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(fmt.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('location: version ' + IntToStr(jsonOut.IntOf('symbols[0].selectedEncoding.version')) + ', ' + jsonOut.StringOf('outputs[0].path'));

//  

//  Sample output:

//  email: version 4, qa_output/qr_email.png
//  phone: version 2, qa_output/qr_phone.png
//  sms: version 3, qa_output/qr_sms.png
//  location: version 2, qa_output/qr_location.png