MainWindow.cpp

来源：互联网发布：淘宝开抢怎么抢的编辑：程序博客网时间：2024/06/06 07:51
#include <QWidget>#include <QCamera>#include <QCameraViewfinder>#include <QCameraImageCapture>#include "mainwindow.h"#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    camera=new QCamera(this);    viewfinder=new QCameraViewfinder(this);    imageCapture=new QCameraImageCapture(camera);    ui->horizontalLayout_View->addWidget(viewfinder);    ui->label_Display->setScaledContents(true);    camera->setViewfinder(viewfinder);    camera->start();    connect(imageCapture, SIGNAL(imageCaptured(int,QImage)), this, SLOT(displayImage(int,QImage)));    connect(ui->pushButton_Capture, SIGNAL(clicked()), this, SLOT(captureImage()));    connect(ui->pushButton_Save, SIGNAL(clicked()), this, SLOT(saveImage()));    connect(ui->pushButton_Quit, SIGNAL(clicked()), qApp, SLOT(quit()));}MainWindow::~MainWindow(){    delete ui;}void MainWindow::captureImage(){    ui->statusBar->showMessage(tr("正在捕获图片"), 1000);    imageCapture->capture();}void MainWindow::displayImage(int /*id*/, QImage image){    ui->label_Display->setPixmap(QPixmap::fromImage(image));    ui->statusBar->showMessage(tr("捕获成功"), 5000);}void MainWindow::saveImage(){    QString fileName=QFileDialog::getSaveFileName(this, tr("保存到文件"), QDir::homePath(), tr("jpeg格式文件(*.jpg)"));    if(fileName.isEmpty()) {        ui->statusBar->showMessage(tr("保存操作已取消"), 5000);        return;    }    const QPixmap* pixmap=ui->label_Display->pixmap();    if(pixmap) {        pixmap->save(fileName);        ui->statusBar->showMessage(tr("保存成功"), 5000);    }}
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