Setting xalign property with an f64 on CellRendererText fails with an unhelpful error

[marcianx]

To right-justify a column's cells in a TreeView, I tried to set the xalign property on the column's CellRendererText. However, that seems to fail with "property can't be set from the given type". I'm having a difficult time finding an example to follow, and I'm not finding the documentation helpful in resolving this.

Minimal reproducible program:

use gio::prelude::*;
use gtk::prelude::*;

use gtk::{Application, CellRendererText};

fn main() {
    let application = Application::new(Some("foo"), Default::default()).unwrap();
    application.connect_activate(|_| {
        let renderer = CellRendererText::new();
        renderer.set_property("xalign", &1.0).unwrap(); // panics
    });
    application.run(&[]);
}

[marcianx]

Wow, it just clicked right now as happen to glance at the C library docs. It needs to be &1.0f32 since that's a gfloat in the docs.

Could this bug thus be changed to a feature request (just edited the title) for a clearer error?

[EPashkin]

IMHO gtk-rs/glib#513 fixed this problem

[sdroege]

Yes that will give a nicer error message now when unwrapping. Or you use renderer.set_property_xaling(1.0) or renderer.set_alignment(1.0, yalign).

@GuillaumeGomez this can be closed :)