用QT实现类似QQ截图的工具(2)

/**
  descr：实例化控件
*/
void Widget::createWidgets()
{
    //两个QLabel的父控件不能为this，否则截图信息会现在是主窗口中，无法正确显示
    fullScreenLabel = new QLabel();
    shotScreenLabel = new QLabel();

rubberBand = new QRubberBand(QRubberBand::Rectangle, fullScreenLabel);

leftMousePress = false;

//初始化托盘控件并组装**************************************************************

trayIcon = new QSystemTrayIcon(QIcon(tr(":/images/heart.svg")), this);
    menu = new QMenu(this);
    restore = new QAction(tr("Restore"), this);
    mini = new QAction(tr("Mini"), this);
    quit = new QAction(tr("Quit"), this);

menu->addAction(restore);
    menu->addAction(mini);
    menu->addAction(quit);
    trayIcon->setContextMenu(menu);

//将托盘显示
    trayIcon->show();

//初始化托盘控件并组装**************************************************************

savePixmap = new QAction(tr("save"), shotScreenLabel);

shotScreenLabel->addAction(savePixmap);
    shotScreenLabel->setContextMenuPolicy(Qt::ActionsContextMenu);
}

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);
    }

}

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