How can I apply a custom theme? - c++

Question

I am using QtCreator to create a Qt Application in C++.
I know CSS and making themes for elements in my applications isn't too hard, but is there a way to make a file and apply it?
I've looked through the Qt Docs but I can't seem to find anything about such a thing.
Currently, I am styling each individual button and stuff but can I just put it all in a file and apply it to everything at once?

Answer 1

easy: you just create a file, e.g. style.myStyle
there you place the styles for all the widgets including events, attributes etc
then you load the file when the app starts and apply that to the app
here is an example how:
#include <QApplication>
#include <QFile>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QFile file("./style.myStyle");
file.open(QFile::ReadOnly);
QString styleSheet = QLatin1String(file.readAll());
a.setStyleSheet(styleSheet);
MainWindow w;
w.show();
return a.exec();
}
now in the style.myStyle file you can don what ever you want e.g.
QPushButton
{
background-color: white;
border-style: outset;
border-width: 2px;
border-radius: 10px;
border-color: beige;
font: bold 14px;
min-width: 10em;
min-height: 20em;
padding: 6px;
}
QPushButton:pressed
{
background-color: rgb(224, 0, 0);
border-style: inset;
}
QFrame, QLabel, QToolTip
{
border: 2px solid green;
border-radius: 2px;
padding: 1px;
}
that code produce a windows like this:
note:
don't forget to validate that the file exists etc etc