qtapp/barcode2cash/mainwindow.cpp

   1 #include "mainwindow.h"
   2 #include "ui_mainwindow.h"
   3
   4 bool checkCameraAvailability()
   5 {
   6     if (QCameraInfo::availableCameras().count() > 0)
   7         return true;
   8     else
   9         return false;
  10 }
  11
  12 MainWindow::MainWindow(QWidget *parent) :
  13     QMainWindow(parent),
  14     ui(new Ui::MainWindow)
  15 {
  16     ui->setupUi(this);
  17
  18     QCameraInfo info = QCameraInfo::defaultCamera();
  19     if (!info.isNull()) {
  20         camera = new QCamera(info);
  21         camera->setCaptureMode(QCamera::CaptureStillImage);
  22         viewfinder = new QCameraViewfinder;
  23         camera->setViewfinder(viewfinder);
  24         viewfinder->show();
  25         imageCapture = new QCameraImageCapture(camera);
  26         connect(imageCapture, SIGNAL(readyForCaptureChanged(bool)), SLOT(updateCameraInfo()));
  27         updateCameraInfo();
  28         connect(ui->pbCapture, SIGNAL(clicked()), SLOT(capture()));
  29     }
  30
  31
  32     ui->statusBar->showMessage(tr("There are %1 cameras").arg(checkCameraAvailability()));
  33
  34 }
  35
  36 MainWindow::~MainWindow() {
  37     delete imageCapture;
  38     delete viewfinder;
  39     delete camera;
  40     delete ui;
  41 }
  42
  43
  44 void MainWindow::updateCameraInfo() {
  45     ui->labCameraReady->setText(imageCapture->isReadyForCapture() ? "ready" : "not ready");
  46 }
  47
  48
  49 void MainWindow::capture() {
  50     camera->start();
  51     camera->searchAndLock();
  52     imageCapture->capture("test.png");
  53     camera->unlock();
  54 }