June 2019
Intermediate to advanced
348 pages
8h 28m
English
Content preview from Qt 5 and OpenCV 4 Computer Vision Projects
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Responding to hotkeys
At this point, almost all of the features are implemented as we intended. Now, let's add some hotkeys for frequently used actions to make our application much easier to use.
You may have noticed that, when we create the actions, we occasionally add a strange & to their text, such as &File and E&xit. Actually, this is a way of setting shortcuts in Qt. In certain Qt widgets, using & in front of a character will automatically create a mnemonic (a shortcut) for that character. Hence, in our application, if you press Alt + F, the File menu will be triggered, and while the File menu is expanded, we can see the Exit action on it. At this time, you press Alt + X, and the Exit action will be triggered to let the application exit. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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