tyrolienne/src/relm.rs

use relm4::{
    SimpleComponent,
    adw::{self, prelude::*},
    gtk::glib::clone,
};

pub struct Dialog {
    window: adw::ApplicationWindow,
    visible: bool,
    heading: String,
    body: String,
}

#[derive(Debug)]
pub enum DialogInput {
    Show { heading: String, body: String },
    Dismiss,
}

pub struct DialogWidgets {
    dialog: adw::AlertDialog,
}

impl SimpleComponent for Dialog {
    type Init = adw::ApplicationWindow;
    type Root = adw::AlertDialog;
    type Widgets = DialogWidgets;
    type Input = DialogInput;
    type Output = ();

    fn init_root() -> Self::Root {
        let dialog = adw::AlertDialog::builder().close_response("ok").build();
        dialog.add_response("ok", "OK");
        dialog
    }

    fn init(
        window: Self::Init,
        root: Self::Root,
        sender: relm4::ComponentSender<Self>,
    ) -> relm4::ComponentParts<Self> {
        let model = Self {
            window,
            visible: false,
            heading: String::new(),
            body: String::new(),
        };

        root.connect_response(
            None,
            clone!(
                #[strong]
                sender,
                move |_, _| sender.input(DialogInput::Dismiss)
            ),
        );

        let widgets = DialogWidgets { dialog: root };

        relm4::ComponentParts { model, widgets }
    }

    fn update(&mut self, message: Self::Input, _sender: relm4::ComponentSender<Self>) {
        match message {
            DialogInput::Show { heading, body } => {
                self.heading = heading;
                self.body = body;
                self.visible = true;
            }
            DialogInput::Dismiss => self.visible = false,
        }
    }

    fn update_view(&self, widgets: &mut Self::Widgets, _sender: relm4::ComponentSender<Self>) {
        widgets.dialog.set_heading(Some(&self.heading));
        widgets.dialog.set_body(&self.body);

        if self.visible {
            widgets.dialog.present(Some(&self.window));
        }
    }
}