April 2018
Beginner
714 pages
18h 21m
English
book
Game Programming using Qt 5 Beginner's Guide - Second Edition
by Pavel Strakhov, Witold Wysota, Lorenz Haas
Content preview from Game Programming using Qt 5 Beginner's Guide - Second Edition
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What just happened?
The state variable is a bitmask holding the possible states of the item. You can check its value against the values of the QStyle::StateFlag parameter using bitwise operators. In the preceding case, the state variable is checked against the State_Selected parameter. If this flag is set, we use green color for the pen.
The type of state is QFlags<StateFlag>. So, instead of using the bitwise operator to test whether a flag is set, you can use the convenient function testFlag().
Used with the preceding example, it would be as follows:
if (option->state.testFlag(QStyle::State_Selected)) {
The most important states you can use with items are described in the following table:
| State | Description |
|
State_Enabled |
Indicates ... |
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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.