QT_MySandbox/OpenCV_WebCamGUI/mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QImage>


MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    timer = new QTimer(this);
    on_refreshRateSlider_valueChanged(100);

    cv::Mat image = cv::Mat::zeros(frame.size(),CV_8UC3);
    qt_image = QImage((const unsigned char*) (image.data), image.cols, image.rows, QImage::Format_RGB888 );

    myFunctions.init_detect_visages();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_open_webcam_clicked()
{

    cap.open(0);
    if(!cap.isOpened())  // Check if we succeeded
    {
        statusBar()->showMessage("Error !");
    }
    else
    {
        connect(timer, SIGNAL(timeout()), this, SLOT(update_window()));
        timer->start(ui->refreshRateSlider->value());
        statusBar()->showMessage("Camera is open !");
    }
}

void MainWindow::on_pushButton_close_webcam_clicked()
{
    disconnect(timer, SIGNAL(timeout()), this, SLOT(update_window()));
    cap.release();
    cv::Mat image = cv::Mat::zeros(frame.size(),CV_8UC3);
    qt_image = QImage((const unsigned char*) (image.data), image.cols, image.rows, QImage::Format_RGB888);
    ui->label->setPixmap(QPixmap::fromImage(qt_image));
    ui->label->resize(ui->label->pixmap()->size());
    cout << "camera is closed" << endl;
}

void MainWindow::update_window()
{
    /*
     * Todo !
     * Fonction détection du mode
     */

    /* Capture de l'image */
    cap >> frame;

    /* Infos Live */
    ui->resText->setText(QString::number(frame.size().width) + "x" + QString::number(frame.size().height));

    /* Check des options
     * Mode Couleur
     */
    if ( ui->colorchooseComboBox->currentIndex() ==0 ) {

            if (ui->objectDetectorComboBox->currentIndex() == 0) {
                qt_image = QImage((const unsigned char*) (frame.data), frame.cols, frame.rows, QImage::Format_RGB888);

            }

            if (ui->objectDetectorComboBox->currentIndex() == 1) {
                qt_image = QImage((unsigned char*) (myFunctions.detect_visages(frame, RGB8).data), frame.cols, frame.rows, QImage::Format_RGB888);

            }
            if (ui->objectDetectorComboBox->currentIndex() == 2) {
                qt_image = QImage((unsigned char*) (myFunctions.dnn_test(frame).data), frame.cols, frame.rows, QImage::Format_RGB888);
            }


        }

    /*
     * Mode BW
     */
    if ( ui->colorchooseComboBox->currentIndex() == 1 ) {
        if (ui->objectDetectorComboBox->currentIndex() == 0) {
            cv::cvtColor(frame, framebw, cv::COLOR_BGR2GRAY);
            qDebug() << "cvtColor OK";
            qt_image = QImage((const unsigned char*) (framebw.data), framebw.cols, framebw.rows, QImage::Format_Grayscale8);
            qDebug() << "qt_image updated";
        }

        if (ui->objectDetectorComboBox->currentIndex() == 1) {

            qt_image = QImage((const unsigned char*) (myFunctions.detect_visages(frame, GREY8).data), framebw.cols, framebw.rows, QImage::Format_RGB888) ;


        }



    }

    ui->label->setPixmap(QPixmap::fromImage(qt_image));
    ui->label->resize(ui->label->pixmap()->size());



    //-- Show what you got
    //imshow( window_name, frame );

}



void MainWindow::on_refreshRateSlider_valueChanged(int value)
{
    ui->refreshRateText->setText(QString::number(value) + " ms"); 
    timer->start(value);

}