Is an example application from Qt 5.11 base package (https://github.com/qt/qtbase/blob/5.11/examples/widgets/desktop/screenshot/). The Screenshot example shows how to take a screenshot of the desktop. With the application the users can take a screenshot of their desktop. They are provided with a couple of options:
Delaying the screenshot, giving them time to rearrange their desktop.
Hiding the application's window while the screenshot is taken.
In addition the application allows the users to save their screenshot if they want to.
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This source is optimized and debianized for Maemo-Leste.