Qr Scanner

src/qrcode_scanner/QrCodeScanDialog.cpp

@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: BSD-3-Clause
+// Copyright (c) 2020-2021, The Monero Project.
+
+#include "QrCodeScanDialog.h"
+#include "ui_QrCodeScanDialog.h"
+
+#include <QMessageBox>
+#include <QtMultimedia/QCamera>
+#include <QtMultimedia/QCameraInfo>
+
+QrCodeScanDialog::QrCodeScanDialog(QWidget *parent)
+    : QDialog(parent)
+    , ui(new Ui::QrCodeScanDialog)
+    , m_scanner(new QrCodeScanner(this))
+{
+    ui->setupUi(this);
+    this->setWindowTitle("Scan QR Code");
+
+    QPixmap pixmap = QPixmap(":/assets/images/warning.png");
+    ui->icon_warning->setPixmap(pixmap.scaledToWidth(32, Qt::SmoothTransformation));
+
+    m_cameras = QCameraInfo::availableCameras();
+    if (m_cameras.count() < 1) {
+        QMessageBox::warning(parent, "QR code scanner", "No available cameras found.");
+        this->close();
+    }
+
+    for (const auto &camera : m_cameras) {
+        ui->combo_camera->addItem(camera.deviceName());
+    }
+
+    connect(ui->combo_camera, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &QrCodeScanDialog::onCameraSwitched);
+
+    connect(m_scanner, &QrCodeScanner::decoded, this, &QrCodeScanDialog::onDecoded);
+    connect(m_scanner, &QrCodeScanner::notifyError, this, &QrCodeScanDialog::notifyError);
+
+    this->onCameraSwitched(0);
+}
+
+void QrCodeScanDialog::onCameraSwitched(int index) {
+    if (index >= m_cameras.size()) {
+        return;
+    }
+
+    m_scanner->setSource(nullptr);
+    delete m_camera;
+
+    m_camera = new QCamera(m_cameras.at(index), this);
+    connect(m_camera, &QCamera::statusChanged, [this](QCamera::Status status){
+        bool unloaded = (status == QCamera::Status::UnloadedStatus);
+        ui->frame_unavailable->setVisible(unloaded);
+    });
+
+    m_camera->setCaptureMode(QCamera::CaptureViewfinder);
+    m_camera->setViewfinder(ui->viewfinder);
+
+    m_scanner->setSource(m_camera);
+    m_scanner->setEnabled(true);
+
+    m_camera->start();
+}
+
+void QrCodeScanDialog::onDecoded(int type, const QString &data) {
+    decodedString = data;
+    this->accept();
+}
+
+void QrCodeScanDialog::notifyError(const QString &msg) {
+    qDebug() << "QrScanner error: " << msg;
+}
+
+QrCodeScanDialog::~QrCodeScanDialog()
+{
+    delete m_camera;
+    delete ui;
+}