void Widget::createConnects()
{
//主窗口信号槽*****************************************************************

connect(ui->pbtnShot, SIGNAL(clicked()), this, SLOT(grapWindowScreen()));
connect(ui->pbtnShotAndMin, SIGNAL(clicked()), this, SLOT(miniWindows()));
connect(ui->pbtnMin, SIGNAL(clicked()), this, SLOT(miniWindows()));

connect(savePixmap, SIGNAL(triggered()), this, SLOT(saveShotPixmap()));

//主窗口信号槽*****************************************************************

//托盘信号槽*******************************************************************

connect(restore, SIGNAL(triggered()), this, SLOT(restoreWindows()));
connect(mini, SIGNAL(triggered()), this, SLOT(miniWindows()));
connect(quit, SIGNAL(triggered()), this, SLOT(quitApplication()));

//托盘信号槽*******************************************************************
}

void Widget::createEventFilter()
{
fullScreenLabel->installEventFilter(this);
}

QString Widget::getSaveShotPixmap()
{
return QFileDialog::getSaveFileName(shotScreenLabel,
tr("Open Image"),
".",
tr("Image Files(*.JPG *.PNG)"));
}

void Widget::grapWindowScreen()
{
if (!fullScreenLabel)
{
fullScreenLabel = new QLabel();
}

//获取全屏截图fullScreenPixmap，并将其放入fullScreenLabel
fullScreenPixmap = QPixmap::grabWindow(QApplication::desktop()->winId());
fullScreenLabel->setPixmap(fullScreenPixmap);

//label全屏显示
fullScreenLabel->showFullScreen();
}

void Widget::miniWindows()
{
showMinimized();
grapWindowScreen();
}

void Widget::restoreWindows()
{
showNormal();
}

void Widget::quitApplication()
{
qApp->quit();
}

void Widget::saveShotPixmap()
{
QString fileName = getSaveShotPixmap();

if (!fileName.isNull())
{
fullScreenPixmap.save(fileName);
}

}