camerawindow.cpp

//#include "camerawindow.h"
//#include "ui_camerawindow.h"
//Q_DECLARE_METATYPE(QCameraInfo)
//CameraWindow::CameraWindow(QWidget *parent) :
//    QMainWindow(parent),
//    ui(new Ui::CameraWindow)
//{
//    ui->setupUi(this);
//    QActionGroup *videoDevicesGroup = new QActionGroup(this);
//    videoDevicesGroup->setExclusive(true);
//    QList<QCameraInfo>cameras =  QCameraInfo::availableCameras();
//    if(cameras.count() > 0)
//    {
//        foreach (const QCameraInfo &cameraInfo,cameras)
//        {
//            qDebug()<<cameraInfo.description();
//            QAction *videoDeviceAction = new QAction(cameraInfo.description(), videoDevicesGroup);
//            videoDeviceAction->setCheckable(true);
//            videoDeviceAction->setData(QVariant::fromValue(cameraInfo));
//            if (cameraInfo == QCameraInfo::defaultCamera())
//                videoDeviceAction->setChecked(true);
//            /* 添加动作*/
//            ui->DeviceMenu->addAction(videoDeviceAction);
//        }
//    }
//    /* 这三个声明必须有 */
//    camera = new QCamera(QCameraInfo::defaultCamera());
//    viewfinder = new QCameraViewfinder(this);
//    imageCapture = new QCameraImageCapture(camera);
//    connect(videoDevicesGroup, SIGNAL(triggered(QAction*)), SLOT(changeCameraDevice(QAction *action)));
//    setCamera(QCameraInfo::defaultCamera());
//}
//CameraWindow::~CameraWindow()
//{
//    delete ui;
//}
//void CameraWindow::setCamera(const QCameraInfo &cameraInfo)
//{
//    delete imageCapture;
//    delete viewfinder;
//    delete camera;
//    camera = new QCamera(cameraInfo);
//    viewfinder = new QCameraViewfinder(this);
//    imageCapture = new QCameraImageCapture(camera);
//    //ui->addWidget(viewfinder);
//    imageCapture->setCaptureDestination(QCameraImageCapture::CaptureToFile);
//    camera->setCaptureMode(QCamera::CaptureStillImage);
//    camera->setViewfinder(viewfinder);
//    camera->start();//启动摄像头
//}
//void CameraWindow::changeCameraDevice(QAction *action)
//{
//    setCamera(qvariant_cast<QCameraInfo>(action->data()));
//}