How to take snapshot of the whole GUI

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?