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gtk-rs change widget appearance at runtime. (infosec.pub)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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It might be lack of sleep, but I can't figure this out.

I have a Label, and I want its text to be red when it represents an error, and I want it be green when it represent "good to go".

I found search result for C and maybe a solution for Python, but nothing for Rust.

I tried manually setting the css-classes property and running queue_draw(); it didn't work.

I can have a gtk::Box or a Frame that I place where the Label should go, then declare two Labels, and use set_child() to switch between them, but that seems like an ugly solution.

Do you have a solution?

SOLVED:

I have to add a "." before declaring a CSS "thing" for it to be considered a class.

Ex:

.overlay {
        background: rgba(60, 60, 60, 1);
        font-size: 25px;
}

instead of:

overlay {
        background: rgba(60, 60, 60, 1);
        font-size: 25px;)
}

Just use label.add_css_class(), label.remove_css_class() or label.set_css_classes() and make sure to properly load your CSS style sheets,

Source: the comment of [email protected]

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[–] mmstick 1 points 1 month ago

It can handle the direction, and supports bidirectional scripts and layouts. The only problem is that some custom widgets need to account for this possibility in their layout. Essentially, widget authors need to specify a box that the text will be drawn into, and cosmic-text will take care of the bidirectional layouts.