Hello,
How can I draw a selection rectangle on my screen with Qt in X11? I want to be able to drag a rectangle on my screen (outside of the application) and then save the whole rectangle.
Thanks in advance.
Huh? That's not even related to what I want...
mkroman
2010-09-22 13:44:23
Indeed, it is not. I don't quite understand how this answer got 5 upvotes.
Arnold Spence
2010-09-22 21:29:41
+2
A:
Part of the solution will involve using the grabWindow() function of QPixmap like so:
QPixmap::grabWindow(QApplication::desktop()->winId());
Qt has an example program for this here.
There rest of the solution, drawing the area to grab, can probably be achieved by either using a full screen transparent window to render a mouse drawn rectangle and then taking the section it outlines from the grabbed desktop image or using a full screen window with the entire grabbed screen painted on it.
Arnold Spence
2010-09-22 21:44:50
Hmm, yeah, I know. This was my initial approach. Since I'm writing a screenshot utility, do you think the time it will take for it to initialize itself and take a full-sized screenshot is gonna be noticeable?
mkroman
2010-09-23 03:03:48
I would imagine it to be as responsive as any other screenshot utility. Building and testing the example program would be a quick experiment.
Arnold Spence
2010-09-23 03:15:27