QT关于屏幕保护程序

首先，要写一个屏保程序，需要一个定时器来统计多长时间没有处理事件进入休眠，

第二，事件处理是一个全局性的，过滤处理事件，

//直接上源码吧，自己改改。重写Application

#ifndef GLOBALAPPLICATION_H#define GLOBALAPPLICATION_H#include <QApplication>#include <QTimer>#include <QWidget>#include <QSplashScreen>class GlobalApplicationPri : public QWidget{    Q_OBJECT    Q_PROPERTY(bool mState READ state WRITE setState NOTIFY stateChanged)public:    explicit GlobalApplicationPri(QWidget *parent = 0);    ~GlobalApplicationPri();    void setWindowInstance(QWidget*wnd,QSplashScreen *);    bool state(); ////    void setState(bool);//周围状态public slots:    void mAcceptGlobalEvent();    void mAcceptActivationEvent();signals:    void    stateChanged();private:    QWidget *mwidget;    QTimer *mtime;    QSplashScreen *msplash;    bool mState;};class GlobalApplication : public QApplication{public:    GlobalApplication(int &argc,char **argv,QWidget *parent = 0);    ~GlobalApplication();    bool notify(QObject*, QEvent *);    void setWindowInstance(QWidget*wnd,QSplashScreen *);private:    GlobalApplicationPri *m_obj;    QWidget *mwidget;    QSplashScreen *msplash;};#endif // GLOBALAPPLICATION_H

下面是.cpp文件

#include "globalapplication.h"#include <QKeyEvent>#include <QDebug>GlobalApplication::GlobalApplication(int &argc,char **argv,QWidget *parent):    QApplication(argc,argv){    m_obj = new GlobalApplicationPri();}GlobalApplication::~GlobalApplication(){    delete m_obj;}bool GlobalApplication::notify(QObject *obj, QEvent *e){    const QMetaObject* objMeta = obj->metaObject();    QString clName = objMeta->className();    if(e->type() == QEvent::KeyPress)    {        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(e);        if(keyEvent->key() == Qt::Key_F1)        {            qDebug()<< clName;            qDebug() << "F1";        }    }    else if(e->type() == QEvent::MouseButtonPress)    {        QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(e);        if(mouseEvent->buttons() == Qt::LeftButton){            qDebug() << "left";            m_obj->setState(true);        }        if(mouseEvent->buttons() == Qt::RightButton){            qDebug() << "Right";        }    }    return QApplication::notify(obj,e);}void GlobalApplication::setWindowInstance(QWidget *wnd,QSplashScreen *splash){    mwidget = wnd;    msplash = splash;    m_obj->setWindowInstance(wnd,splash);}GlobalApplicationPri::GlobalApplicationPri(QWidget *parent){    mwidget = Q_NULLPTR;    mtime = Q_NULLPTR;    msplash = Q_NULLPTR;    mtime = new QTimer(this);    connect(mtime, SIGNAL(timeout()),this, SLOT(mAcceptGlobalEvent()));    mtime->start(20000);    connect(this, SIGNAL(stateChanged()),this, SLOT(mAcceptActivationEvent()));}GlobalApplicationPri::~GlobalApplicationPri(){}void GlobalApplicationPri::setWindowInstance(QWidget *wnd, QSplashScreen *splash){    mwidget = wnd;    msplash = splash;}bool GlobalApplicationPri::state(){    return mState;}void GlobalApplicationPri::setState(bool mcont){    mState = mcont;    emit stateChanged();}void GlobalApplicationPri::mAcceptGlobalEvent(){    mwidget->hide();    msplash->show();}void GlobalApplicationPri::mAcceptActivationEvent(){    mtime->stop();    msplash->hide();    mwidget->show();    mtime->start(20000);}

最后来看看主函数

#include "mainwindow.h"#include <QApplication>using namespace LENSOMETER;#include <QObject>#include <QApplication>#include <QFontDatabase>#include <QSplashScreen>#include "../../common/global/globalapplication.h"#include "mainwindow.h"#include <QThread>int main(int argc, char *argv[]){    GlobalApplication app(argc, argv);//    //////    /// \brief splash//    ///    MainWindow mainWin;    QSplashScreen *splash = new QSplashScreen;    app.setWindowInstance(&mainWin,splash);    splash->setPixmap(QPixmap(":/ui_image/load.png"));    splash->show();//显示图片    Qt::Alignment topRight = Qt::AlignRight | Qt::AlignTop;    splash->showMessage(QObject::tr("Setting up the main window..."),topRight, Qt::white);    splash->showMessage(QObject::tr("Loading modules..."),                        topRight, Qt::white);    splash->showMessage(QObject::tr("Establishing connections..."),                        topRight, Qt::white);    QThread::sleep(1);    mainWin.show();    splash->finish(&mainWin);    return app.exec();}

QQ:609162385