Editing qss stylesheet programmatically

Tirolel

Hi everyone.

I'm looking into a solution or idea how to edit an exiting .qss file. I have 4-5 qss files which I want to edit the file in Gui without doing manually.

fx. I have bunch of items and I want to edit the QLabel's color.

....
QLabel
{
...
color: #aaaaaa;
....
}
....

How am I going to archieve this?

raven-worx

@Tirolel

get the qss from the widget using QWidget::stylesheet()
set the returned qss to a QTextEdit and edit it
when finished set the qss QTextEdit::toPlainText() back to the same widget where you got it from using QWidget::setStyleSheet()

Tirolel

Yea but the issue here is that the "user" have to edit the qss manually. What I want to archieve is in my GUI I have few QLineEdit with qColorDialog (For QLabel, textsize and background) . So user needs only to pick a color and "somehow" replace the chosen color.
fx. if I Choose red in color picker, It have to update the qss with the value I have picked.

raven-worx

@Tirolel

QColor color = QColorDialog::getColor(...);

widget->setStyleSheet( QString(
"QLabel {"
"..."
"color: %1;"
"...."
"}"
).arg( color.name() ) );

If the qss can be predicted, than there is no way around parsing the qss and replace the value.

Tirolel

@raven-worx

I see. But what would the default value of color be before setting the color? can I do sth like this

"color: %1#fffffff;"

raven-worx

@Tirolel
the default color is decided by the platform style.
So you should ask the widget's QPalette:

widget->palette().color( QPalette::Text );

Which color group excactly depends on the widget type. But i think mostly it should be QPalette::Text for the text.

In my example the %1will be replaced with the value passed to arg()
So you need to remove it, when you are not calling the arg() method on the string.

Tirolel

Okay thanks a lot!

I will try to see if I can get it to work :)