Saving widget in image

[A Former User]

hello,
how can I save what's appearing on a widget's window?
i found 2 solutions for that that didn't work:

1. ui->widget->grab().save("image.png");

2. QPixmap originalPixmap;

   originalPixmap = QPixmap::grabWidget(tabWidget->currentWidget());

   QString format = "png";

   QString fileName = "myshot.png";

   originalPixmap.save(fileName, format.toAscii());

I want to make a screenshot of a video that is presented in the widget.
Is there a better way to save the widget or am i doing something wrong?
Is there a way to "manually" save a part of the screen(where the widget is located)?

thanks.

[mrjj]

@Omri said:

Hi and welcome

ui->widget->grab().save("image.png");

Does work as expected here. (win 7 , Qt 5.5) for a normal control.

But If you are showing live video, it is often not working as one would expect.

You could look into exporting a frame from the video
http://stackoverflow.com/questions/30800772/how-to-grab-video-frames-in-qt
or try the
http://doc.qt.io/qt-5/qtwidgets-desktop-screenshot-example.html
and see if grabbing the whole screen, does show your video.

[A Former User]

Thank you.
these 2 lines of code did the job:

QScreen *screen = QGuiApplication::primaryScreen();

originalPixmap = screen->grabWindow(ui->widget->winId());