How to take snapshot of the whole GUI

Qt Enthusiast

I have QT GUI and QMainWindow and have multiple windows inside it . I would like to take snapshot of the whole GUI and save it png format

Could you let me know how is to be done

zapprox

Hi, Screenshot Example may help.
Regards.

J.Hilk

Hi,

QPixmap *pixmap = new QPixmap(this->size());
this->render(pixmap);

inside your Gui-Class should do the trick.

Qt Enthusiast

For Mainwindow

Devopia53

@Qt-Enthusiast

I would like to take snapshot of the whole GUI

If this means to include window frames, try this:

void Mainwindow::screenShot()
{
    QRect   geo = frameGeometry();
    qApp->primaryScreen()->grabWindow(0, geo.x(), geo.y(), geo.width(), geo.height()).save("test.png");
}

Qt Enthusiast

how to get qApp pointer If I am accessing Mainwindow poiter some other QWidget

Venkatesh V

Hi @Qt-Enthusiast
include bellow line to your mainWindow class then you will get qApp pointer.
#include<QApplication>

Qt Enthusiast

I am getting following error

gui/qt4/qmain/GQMainWindow.cc: In member function ?void GQMainWindow::copy()?:
gui/qt4/qmain/GQMainWindow.cc:959:10: error: ?class QApplication? has no member named ?primaryScreen?
qApp->primaryScreen()->grabWindow(0,geo.x(),geo.y(),geo.width(),geo.height()).save("test.png");
^

Qt Enthusiast

it is qt.4.3.3

Venkatesh V

Hi,

For me it works fine.
Try with including both headers,
#include <QApplication>
#include <QScreen>

Devopia53

@Qt-Enthusiast

Unfortunately, the QScreen is not supported in Qt 4.3.3.
However, you can use QPixmap instead of QScreen. But I can't guarantee it. I'm not currently using Qt 4.3.3.

The qApp is equivalent to the pointer returned by the QCoreApplication::instance() or the QApplication::instance() function.

? Offline

Why not simply use Windows Key and PrtScr - does it have to be coded?