#include "MyCameraWindow.h"MyCameraWindow::MyCameraWindow(CvCapture *cam, QWidget *parent) : QWidget(parent) {    camera = cam;    QVBoxLayout *layout = new QVBoxLayout;    cvwidget = new QOpenCVWidget(this);    layout->addWidget(cvwidget);    setLayout(layout);    resize(500, 400);    startTimer(1);  // 0.1-second timer }void MyCameraWindow::timerEvent(QTimerEvent*) {    IplImage *image=cvQueryFrame(camera);    cvwidget->putImage(image);}