QT-------截图工具

#ifndef SCREENSHOT_H

#define SCREENSHOT_H

#include <QWidget>

#include <QMainWindow>

#include <QTimer>

#include <QPixmap>

#include <QMessageBox>

#include <QDesktopWidget>

#include <QFileDialog>

#include <QDesktopServices>

#include <QDir>

#include <QDebug>

#include <QClipboard>

#include <QContextMenuEvent>

#include <QMenu>

#include <QAction>

#include <QCursor>

#include <QProcess>

namespace Ui {

class screenshot;

class screenshot : public QWidget

    Q_OBJECT

public:

    explicit screenshot(QWidget *parent = 0);

    ~screenshot();

protected:

    void contextMenuEvent(QContextMenuEvent *event);

private slots:

    void on_pushButton_clicked();

    void shotScreenSlot();

    void savePictureSlot();

    void startNotepadSlot();

    void on_pushButton_3_clicked();

private:

    Ui::screenshot *ui;

    QTimer *timer;

    QPixmap pixmap;//截取图片

};

#endif // SCREENSHOT_H

#include "screenshot.h"

#include "ui_screenshot.h"

screenshot::screenshot(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::screenshot)

    ui->setupUi(this);

    QObject::connect(ui->pushButton_2,SIGNAL(clicked()),this,SLOT(savePictureSlot()));

screenshot::~screenshot()

    delete ui;

void screenshot::contextMenuEvent(QContextMenuEvent *event)

    QMenu *menu=new QMenu(this);

    QAction *action=new QAction(this);

    QAction *processAction=new QAction(this);

    QObject::connect(processAction,SIGNAL(triggered()),this,SLOT(startNotepadSlot()));

    QObject::connect(action,SIGNAL(triggered()),this,SLOT(savePictureSlot()));

    action->setText("save As");

    processAction->setText("start notepad");

    menu->addAction(processAction);

    menu->addAction(action);

    menu->exec(QCursor::pos());

void screenshot::on_pushButton_clicked()

    if(ui->checkBox->isChecked())

        this->hide();//隐葳窗体

        this->timer=new QTimer;

        QObject::connect(this->timer,SIGNAL(timeout()),SLOT(shotScreenSlot()));

        this->timer->start(1000/5);

    else

        qApp->beep();//泵的一声

void screenshot::shotScreenSlot()

    //pixmap

    this->pixmap=QPixmap::grabWindow(QApplication::desktop()->winId());

    ui->label->setPixmap(this->pixmap.scaled(ui->label->size()));

    QClipboard *clipboard=QApplication::clipboard();

    clipboard->setPixmap(this->pixmap);

    this->show();

    this->timer->stop();

void screenshot::savePictureSlot()

    //QString fileName=QDir::currentPath();

    QString fileName=QFileDialog::getSaveFileName(this,tr("Save File"),"./未命命.bmp",tr("images(*.bmp)"));

    this->pixmap.save(fileName);

void screenshot::startNotepadSlot()

    QProcess *process=new QProcess;

    process->start("notepad.exe");

void screenshot::on_pushButton_3_clicked()

    this->close();

#include "screenshot.h"

#include <QApplication>

#include <QWidget>

#include <QDir>

#include <QIcon>

int main(int argc, char *argv[])

    QApplication a(argc, argv);

    QString strPath=QApplication::applicationDirPath();

    strPath+="/convert.png";

    a.setWindowIcon(QIcon(strPath));

    screenshot w;

    w.setMaximumSize(884,765);

    w.setMinimumSize(884,765);

    w.show();

    return a.exec();