update

src/CMakeLists.txt

@@ -83,6 +83,7 @@ target_link_libraries(${PROJECT_NAME} PUBLIC
     Qt::CorePrivate
     Qt::QuickPrivate
     Qt::QmlPrivate
+    ZXing
 )
 
 #安装

src/FluQRCode.cpp

@@ -0,0 +1,53 @@
+#include "FluQRCode.h"
+
+#include "BarcodeFormat.h"
+#include "BitMatrix.h"
+#include "MultiFormatWriter.h"
+
+using namespace ZXing;
+
+FluQRCode::FluQRCode(QQuickItem* parent) : QQuickPaintedItem(parent)
+{
+    color(QColor(0,0,0,255));
+    size(100);
+    setWidth(_size);
+    setHeight(_size);
+    connect(this,&FluQRCode::textChanged,this,[=]{update();});
+    connect(this,&FluQRCode::colorChanged,this,[=]{update();});
+    connect(this,&FluQRCode::sizeChanged,this,[=]{
+        setWidth(_size);
+        setHeight(_size);
+        update();
+    });
+}
+
+
+void FluQRCode::paint(QPainter* painter)
+{
+    if(_text.isEmpty()){
+        return;
+    }
+    if(_text.length()>1108){
+        return;
+    }
+    painter->save();
+    painter->eraseRect(boundingRect());
+    auto format = ZXing::BarcodeFormatFromString("QRCode");
+    auto writer = MultiFormatWriter(format);
+    writer.setMargin(0);
+    writer.setEncoding(ZXing::CharacterSet::UTF8);
+    auto matrix = writer.encode(_text.toUtf8().constData(), 0, 0);
+    auto bitmap = ToMatrix<uint8_t>(matrix);
+    auto image = QImage(bitmap.data(), bitmap.width(), bitmap.height(), bitmap.width(), QImage::Format::Format_Grayscale8).copy();
+    QImage rgbImage = image.convertToFormat(QImage::Format_ARGB32);
+    for (int y = 0; y < rgbImage.height(); ++y) {
+        for (int x = 0; x < rgbImage.width(); ++x) {
+            QRgb pixel = rgbImage.pixel(x, y);
+            if (qRed(pixel) == 0 && qGreen(pixel) == 0 && qBlue(pixel) == 0) {
+                rgbImage.setPixelColor(x, y, _color);
+            }
+        }
+    }
+    painter->drawImage(QRect(0, 0, static_cast<int>(width()), static_cast<int>(height())), rgbImage);
+    painter->restore();
+}

src/FluQRCode.h

@@ -0,0 +1,22 @@
+#ifndef FLUQRCODE_H
+#define FLUQRCODE_H
+
+#include <QQuickItem>
+#include <QQuickPaintedItem>
+#include <QPainter>
+#include "stdafx.h"
+
+class FluQRCode : public QQuickPaintedItem
+{
+    Q_OBJECT
+    Q_PROPERTY_AUTO(QString,text)
+    Q_PROPERTY_AUTO(QColor,color)
+    Q_PROPERTY_AUTO(int,size);
+    QML_NAMED_ELEMENT(FluQRCode)
+public:
+    explicit FluQRCode(QQuickItem *parent = nullptr);
+    void paint(QPainter* painter) override;
+
+};
+
+#endif // FLUQRCODE_H