Qt中QZXing 的编译与使用

DEFINES += ENABLE_ENCODER_GENERIC

#include "QZXing.h"
 
int main()
{
    QString data = "text to be encoded";
    QImage barcode = QZXing::encodeData(data);
    //QImage barcode = QZXing::encodeData(data, QZXing::EncoderFormat_QR_CODE,
    //                                    QSize(240, 240), QZXing::EncodeErrorCorrectionLevel_H);
}

#ifdef ENABLE_ENCODER_GENERIC
//二维码编码接口，目前仅支持QR Code码
//QZXingEncoderConfig是个结构体，成员如下一个重载接口的参数
static QImage encodeData(const QString &data,
                         const QZXingEncoderConfig &encoderConfig);
 
//二维码编码接口，目前仅支持QR Code码
//encoderFormat 编码格式枚举
//encoderImageSize 生成二维码的大小
//errorCorrectionLevel 纠错等级
//border =true会有一圈白边，感觉没啥用
//transparent =true会半透明，感觉没啥用
static QImage encodeData(const QString& data,
                         const EncoderFormat encoderFormat = EncoderFormat_QR_CODE,
                         const QSize encoderImageSize = QSize(240, 240),
                         const EncodeErrorCorrectionLevel errorCorrectionLevel = EncodeErrorCorrectionLevel_L,
                         const bool border = false,
                         const bool transparent = false);
#endif // ENABLE_ENCODER_GENERIC

#include "QZXing.h"
 
int main()
{
    QImage imageToDecode("file.png");
    QZXing decoder;
    //必要设置
    decoder.setDecoder(QZXing::DecoderFormat_QR_CODE | QZXing::DecoderFormat_EAN_13 );
 
    //可选设置
    //decoder.setSourceFilterType(QZXing::SourceFilter_ImageNormal | QZXing::SourceFilter_ImageInverted);
    decoder.setSourceFilterType(QZXing::SourceFilter_ImageNormal);
    decoder.setTryHarderBehaviour(QZXing::TryHarderBehaviour_ThoroughScanning | QZXing::TryHarderBehaviour_Rotate);
 
    //解码
    QString result = decoder.decodeImage(imageToDecode);
}

#include "QZXing.h"
 
int main()
{
	...
	QZXing::registerQMLTypes();
	...
}

import QtQuick 2.0
import QZXing 3.3
 
Item{
    function decode(preview) {
        imageToDecode.source = preview
        decoder.decodeImageQML(imageToDecode);
    }
 
    Image{
        id:imageToDecode
    }
 
    QZXing{
        id: decoder
 
        enabledDecoders: QZXing.DecoderFormat_QR_CODE
 
        /
        //可选设置
        tryHarderType: QZXing.TryHarderBehaviour_ThoroughScanning | QZXing.TryHarderBehaviour_Rotate
 
        imageSourceFilter: QZXing.SourceFilter_ImageNormal //| QZXing.SourceFilter_ImageInverted
        /
 
        onDecodingStarted: console.log("Decoding of image started...")
 
        onTagFound: console.log("Barcode data: " + tag)
 
        onDecodingFinished: console.log("Decoding finished " + (succeeded==true ? "successfully" : "unsuccessfully") )
    }
}