update

src/FluQrCodeItem.cpp

@@ -0,0 +1,57 @@
+#include "FluQrCodeItem.h"
+
+#include "qrcode/qrencode.h"
+
+FluQrCodeItem::FluQrCodeItem(QQuickItem* parent):QQuickPaintedItem(parent){
+    color(QColor(0,0,0,255));
+    bgColor(QColor(255,255,255,255));
+    size(100);
+    setWidth(_size);
+    setHeight(_size);
+    connect(this,&FluQrCodeItem::textChanged,this,[=]{update();});
+    connect(this,&FluQrCodeItem::colorChanged,this,[=]{update();});
+    connect(this,&FluQrCodeItem::bgColorChanged,this,[=]{update();});
+    connect(this,&FluQrCodeItem::sizeChanged,this,[=]{
+        setWidth(_size);
+        setHeight(_size);
+        update();
+    });
+}
+
+
+void FluQrCodeItem::paint(QPainter* painter){
+    if(_text.isEmpty()){
+        return;
+    }
+    if(_text.length()>1024){
+        return;
+    }
+    painter->save();
+    QRcode *qrcode = QRcode_encodeString(_text.toUtf8().constData(), 2, QR_ECLEVEL_Q, QR_MODE_8, 1);
+    qint32 w = width();
+    qint32 h = height();
+    qint32 qrcodeW = qrcode->width > 0 ? qrcode->width : 1;
+    double scaleX = (double)w / (double)qrcodeW;
+    double scaleY = (double)h / (double)qrcodeW;
+    QImage image = QImage(w, h, QImage::Format_ARGB32);
+    QPainter p(&image);
+    p.setBrush(_bgColor);
+    p.setPen(Qt::NoPen);
+    p.drawRect(0, 0, w, h);
+    p.setBrush(_color);
+    for (qint32 y = 0; y < qrcodeW; y++)
+    {
+        for (qint32 x = 0; x < qrcodeW; x++)
+        {
+            unsigned char b = qrcode->data[y*qrcodeW + x];
+            if (b & 0x01)
+            {
+                QRectF r(x * scaleX,y * scaleY, scaleX, scaleY);
+                p.drawRects(&r, 1);
+            }
+        }
+    }
+    QPixmap pixmap = QPixmap::fromImage(image);
+    painter->drawPixmap(QRect(0, 0, static_cast<int>(width()), static_cast<int>(height())), pixmap);
+    painter->restore();
+}