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#include "widget.h"
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#include "ui_widget.h"
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#include <QGuiApplication>
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#include <QScreen>
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#include <QFile>
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#include <QPixmap>
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#include <QBuffer>
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#include "camera.h"
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Widget::Widget(QWidget *parent)
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: QWidget(parent)
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, ui(new Ui::Widget)
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{
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ui->setupUi(this);
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/* 摄像头 */
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camera = new Camera(this);
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scanCameraDevice();
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/* 信号连接槽 */
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connect(camera, SIGNAL(readyImage(QImage)),
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this, SLOT(showImage(QImage)));
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connect(ui->cam_traBut,SIGNAL(clicked(bool)),
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camera, SLOT(cameraProcess(bool)));//开启摄像头
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connect(ui->cam_playBut, SIGNAL(clicked()),
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this, SLOT(saveImageToLocal()));
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}
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Widget::~Widget()
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{
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delete ui;
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}
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void Widget::scanCameraDevice()
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{
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/* QFile文件指向/dev/video1 */
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QFile file("/dev/video1");
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file.setFileName("/dev/video1");
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if (file.exists())
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{
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qDebug()<<"camera success" ;
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camera->selectCameraDevice(1);//video1
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}
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else
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{
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qDebug()<<"camera cannot finded" ;
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}
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}
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void Widget::showImage(const QImage &image)
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{
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/* 显示图像 */
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ui->displayLabel->setPixmap(QPixmap::fromImage(image));
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saveImage = image;
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/* 判断图像是否为空，空则设置拍照按钮不可用 */
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if (!saveImage.isNull())
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ui->cam_playBut->setEnabled(true);
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else
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ui->cam_playBut->setEnabled(false);
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}
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void Widget::saveImageToLocal()
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{
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/* 判断图像是否为空 */
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if (!saveImage.isNull()) {
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QString fileName =
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QCoreApplication::applicationDirPath() + "/test.png";
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qDebug()<<"正在保存"<<fileName<<"图片,请稍候..."<<endl;
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/* save(arg1，arg2，arg3)重载函数，arg1代表路径文件名，
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* arg2保存的类型，arg3代表保存的质量等级 */
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saveImage.save(fileName, "PNG", 1);
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/* 设置拍照的图像为显示在photoLabel上 */
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ui->cam_albumBut->setPixmap(QPixmap::fromImage(QImage(fileName)));
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qDebug()<<"保存完成！"<<endl;
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}
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}
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