改写Qlabel双击截屏

#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); ui->label->installEventFilter(this); } MainWindow::~MainWindow() { delete ui; } void MainWindow::changeEvent(QEvent *e) { QMainWindow::changeEvent(e); switch (e->type()) { case QEvent::LanguageChange: ui->retranslateUi(this); break; default: break; } } //bool MainWindow::eventFilter(QObject *obj, QEvent *event) //{ // if(obj == ui->label) // { // if(event->Style == QEvent::MouseButtonDblClick) // { // QMouseEvent *e = static_cast<QMouseEvent *>(event); // if(e->button() == Qt::LeftButton) // { // QMouseEvent *eNew = new QMouseEvent(QEvent::MouseButtonDblClick, e->pos(), e->button(), e->buttons(), e->modifiers()); // QApplication::postEvent(ui->pushButton, eNew); // return true; // } // } // } // return QMainWindow::eventFilter(obj, event); //} void MainWindow::on_pushButton_clicked() { QPixmap fullScreen; int screenWidget = 640; //屏幕尺寸设置，自己要写别的函数修改尺寸的改这里 int screenHight = 480; //就是这一步截取了全屏 fullScreen = QPixmap::grabWindow(QApplication::desktop()->winId(),0,0,screenWidget,screenHight); //这一步是设置弹出框询问保存位置和命名的，要自己修改位置和命名的改这里 // QFileDialog::Options options; // QString selectedFilter; // QString fileName = QFileDialog::getSaveFileName(this, // tr("Save picture"), // "savescreen.jpg", // &selectedFilter, // options); // QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"), // "/home/tom/zhangcong/untitled.png", // tr("Images (*.png *.xpm *.jpg)")); // QString pathName = "/home/tom/zhangcong/"; QString pathName = QCoreApplication::applicationDirPath() + "/"; QString fileName = pathName + QDateTime::currentDateTime().toString("yyyyMMddhhmmss") +".jpg"; // //设置截图区域，截图区域是从整屏幕截图中复制相应的区域，要自己写函数的改这里 // int x = 0; // int y = 0; // int w = 640; // int h = 480; /****************************以下几步是正常的保存QPixmap，可以不转QIameg****************************/ // fullScreen = fullScreen.copy(x,y,w,h); //截取区域改这里 fullScreen.save(fileName,"JPG"); //需要有保存对话框的这么写 if(fullScreen.save(fileName,"JPG")) qDebug("----------save screen success----------"); /**************以下几步是针对嵌入式系统，图像位数有限制，转为了8位的图像，PC端可以不需要**************/ // QImage image = fullScreen.toImage(); // // image = image.copy(x,y,w,h); //截取区域改这里 // //转8位 // image = image.convertToFormat(QImage::Format_Indexed8,Qt::AutoColor); // //image.save(fileName,"JPG") 需要有保存对话框的这么写 // if(image.save("/savescreen.jpg","JPG")) // qDebug("----------save screen success----------"); }