April 2018
Intermediate to advanced
404 pages
8h 27m
English
Content preview from Hands-On GUI Programming with C++ and Qt5
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Image scaling and cropping
Since we learned about the File Selection Dialog in the previous section, I'd thought we should learn something fun this time!
First off, let's create a new Qt Widgets Application. Then, open up mainwindow.ui and create the following user interface:
Let's dissect this user interface into three parts:
- Top—Image preview:
- First, add a Horizontal Layout to the window.
- Then, add a Label widget into the Horizontal Layout we just added, then set the text property to empty. Set both the label's minimumSize and maximumSize properties to 150x150. Finally, set the frameShape property under the QFrame category to Box.
- Add ...
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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.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.