C++ 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. C++

#include <CkFormats.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkFormats fmt;
    CkJsonObject json;
    CkJsonObject jsonOut;
    json.UpdateInt("render.moduleSize",6);
    json.UpdateBool("output.overwrite",true);
    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,jsonOut);
    if (success == false) {
        std::cout << fmt.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "email: version " << jsonOut.IntOf("symbols[0].selectedEncoding.version") << ", " << jsonOut.stringOf("outputs[0].path") << "\r\n";

    //  

    //  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,jsonOut);
    if (success == false) {
        std::cout << fmt.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "phone: version " << jsonOut.IntOf("symbols[0].selectedEncoding.version") << ", " << jsonOut.stringOf("outputs[0].path") << "\r\n";

    //  

    //  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,jsonOut);
    if (success == false) {
        std::cout << fmt.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "sms: version " << jsonOut.IntOf("symbols[0].selectedEncoding.version") << ", " << jsonOut.stringOf("outputs[0].path") << "\r\n";

    //  

    //  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,jsonOut);
    if (success == false) {
        std::cout << fmt.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "location: version " << jsonOut.IntOf("symbols[0].selectedEncoding.version") << ", " << jsonOut.stringOf("outputs[0].path") << "\r\n";

    //  

    //  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
    }