Unicode C++ Requires Chilkat v11.7.0+

Get the QR Code Capabilities of the Chilkat Version in Use

See more QR Code Examples

Demonstrates the capabilities operation, which describes what the installed version of Chilkat can do: the range of QR versions, the error-correction levels, the operations, the image formats and the limits. A program can check for a feature here instead of testing for a Chilkat version number. The request can be an empty JSON object. Unicode C++

#include <CkJsonObjectW.h>
#include <CkFormatsW.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.

    CkJsonObjectW json;
    CkFormatsW fmt;
    CkJsonObjectW jsonOut;
    success = fmt.QrCode(L"capabilities",json,jsonOut);
    if (success == false) {
        wprintf(L"%s\n",fmt.lastErrorText());
        return;
    }

    wprintf(L"Chilkat version: %s\n",jsonOut.stringOf(L"productVersion"));
    wprintf(L"symbology: %s\n",jsonOut.stringOf(L"symbologies[0].id"));
    wprintf(L"QR versions: %d to %d\n",jsonOut.IntOf(L"symbologies[0].encoding.version.min"),jsonOut.IntOf(L"symbologies[0].encoding.version.max"));
    wprintf(L"structured append, most symbols: %d\n",jsonOut.IntOf(L"symbologies[0].structuredAppend.maxSymbols"));

    int i;
    int n;
    n = jsonOut.SizeOfArray(L"symbologies[0].encoding.errorCorrection");
    for (i = 0; i <= n - 1; i++) {
        jsonOut.put_I(i);
        wprintf(L"error correction: %s\n",jsonOut.stringOf(L"symbologies[0].encoding.errorCorrection[i]"));
    }

    //  The operations this version implements.
    n = jsonOut.SizeOfArray(L"operations");
    for (i = 0; i <= n - 1; i++) {
        jsonOut.put_I(i);
        if (jsonOut.BoolOf(L"operations[i].available") == true) {
            wprintf(L"operation: %s\n",jsonOut.stringOf(L"operations[i].name"));
        }

    }

    n = jsonOut.SizeOfArray(L"imageFormats.output");
    for (i = 0; i <= n - 1; i++) {
        jsonOut.put_I(i);
        wprintf(L"image format: %s\n",jsonOut.stringOf(L"imageFormats.output[i]"));
    }

    wprintf(L"default timeout: %d ms\n",jsonOut.IntOf(L"limits.timeoutMs.default"));
    wprintf(L"default largest image: %d pixels\n",jsonOut.IntOf(L"limits.maxPixels.default"));

    //  Sample output:

    //  Chilkat version: 11.7.0
    //  symbology: qr
    //  QR versions: 1 to 40
    //  structured append, most symbols: 16
    //  error correction: auto
    //  error correction: L
    //  error correction: M
    //  error correction: Q
    //  error correction: H
    //  operation: generate
    //  operation: measure
    //  operation: validate
    //  operation: capabilities
    //  image format: png
    //  image format: svg
    //  default timeout: 10000 ms
    //  default largest image: 16777216 pixels
    }