148 lines
4.4 KiB
Rust
148 lines
4.4 KiB
Rust
// Copyright 2023 System76 <info@system76.com>
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// SPDX-License-Identifier: MPL-2.0
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//! Application API example
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use cosmic::app::context_drawer::{self, ContextDrawer};
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use cosmic::app::{Core, Settings, Task};
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use cosmic::executor;
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use cosmic::iced::{alignment, Length, Size};
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use cosmic::prelude::*;
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use cosmic::widget::{self, about::About, nav_bar};
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/// Runs application with these settings
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#[rustfmt::skip]
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let settings = Settings::default()
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.size(Size::new(1024., 768.));
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cosmic::app::run::<App>(settings, ())?;
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Ok(())
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}
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/// Messages that are used specifically by our [`App`].
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#[derive(Clone, Debug)]
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pub enum Message {
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ToggleAbout,
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Open(String),
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}
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/// The [`App`] stores application-specific state.
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pub struct App {
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core: Core,
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nav_model: nav_bar::Model,
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about: About,
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show_about: bool,
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}
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/// Implement [`cosmic::Application`] to integrate with COSMIC.
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impl cosmic::Application for App {
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/// Default async executor to use with the app.
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type Executor = executor::Default;
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/// Argument received [`cosmic::Application::new`].
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type Flags = ();
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/// Message type specific to our [`App`].
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type Message = Message;
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/// The unique application ID to supply to the window manager.
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const APP_ID: &'static str = "org.cosmic.AboutDemo";
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fn core(&self) -> &Core {
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&self.core
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}
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fn core_mut(&mut self) -> &mut Core {
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&mut self.core
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}
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/// Creates the application, and optionally emits task on initialize.
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fn init(core: Core, _flags: Self::Flags) -> (Self, Task<Self::Message>) {
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let nav_model = nav_bar::Model::default();
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let about = About::default()
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.name("About Demo")
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.icon(widget::icon::from_name(Self::APP_ID))
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.version("0.1.0")
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.author("System76")
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.license("GPL-3.0-only")
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.license_url("https://choosealicense.com/licenses/gpl-3.0/")
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.developers([("Michael Murphy", "info@system76.com")])
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.links([
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("Website", "https://system76.com/cosmic"),
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("Repository", "https://github.com/pop-os/libcosmic"),
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("Support", "https://github.com/pop-os/libcosmic/issues"),
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]);
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let mut app = App {
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core,
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nav_model,
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about,
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show_about: false,
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};
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app.set_header_title("COSMIC About Example".into());
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let command = app.set_window_title(
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"COSMIC About Example".into(),
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app.core.main_window_id().unwrap(),
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);
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(app, command)
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}
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/// Allows COSMIC to integrate with your application's [`nav_bar::Model`].
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fn nav_model(&self) -> Option<&nav_bar::Model> {
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Some(&self.nav_model)
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}
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/// Called when a navigation item is selected.
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fn on_nav_select(&mut self, id: nav_bar::Id) -> Task<Self::Message> {
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self.nav_model.activate(id);
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Task::none()
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}
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fn context_drawer(&self) -> Option<ContextDrawer<'_, Self::Message>> {
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self.show_about.then(|| {
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context_drawer::about(
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&self.about,
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|url| Message::Open(url.to_owned()),
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Message::ToggleAbout,
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)
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})
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}
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/// Handle application events here.
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fn update(&mut self, message: Self::Message) -> Task<Self::Message> {
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match message {
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Message::ToggleAbout => {
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self.set_show_context(!self.core.window.show_context);
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self.show_about = !self.show_about;
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}
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Message::Open(url) => match open::that_detached(url) {
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Ok(_) => (),
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Err(err) => eprintln!("Failed to open URL: {err}"),
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},
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}
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Task::none()
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}
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/// Creates a view after each update.
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fn view(&self) -> Element<'_, Self::Message> {
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let show_about_button = widget::button::text("Show about").on_press(Message::ToggleAbout);
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let centered = cosmic::widget::container(
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widget::column::with_capacity(1)
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.push(show_about_button)
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.width(Length::Fill)
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.height(Length::Shrink)
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.align_x(alignment::Horizontal::Center),
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)
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.width(Length::Fill)
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.height(Length::Shrink)
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.align_x(alignment::Horizontal::Center)
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.align_y(alignment::Vertical::Center);
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Element::from(centered)
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}
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}
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