linebender/masonry

use masonry::widget::{prelude::*, TextBox};
use masonry::widget::{Button, Flex, Label, Portal, WidgetMut};
use masonry::Action;
use masonry::{AppDelegate, AppLauncher, DelegateCtx, WindowDescription, WindowId};

const VERTICAL_WIDGET_SPACING: f64 = 20.0;

struct Delegate {
    next_task: String,
}

impl AppDelegate for Delegate {
    fn on_action(
        &mut self,
        ctx: &mut DelegateCtx,
        _window_id: WindowId,
        _widget_id: WidgetId,
        action: Action,
        _env: &Env,
    ) {
        match action {
            Action::ButtonPressed => {
                let mut root: WidgetMut<Portal<Flex>> = ctx.get_root();
                let mut flex = root.child_mut();
                flex.add_child(Label::new(self.next_task.clone()));
            }
            Action::TextChanged(new_text) => {
                self.next_task = new_text.clone();
            }
            _ => {}
        }
    }
}

fn main() {
    // The main button with some space below, all inside a scrollable area.
    let root_widget = Portal::new(
        Flex::column()
            .with_child(
                Flex::row()
                    .with_child(TextBox::new(""))
                    .with_child(Button::new("Add task")),
            )
            .with_spacer(VERTICAL_WIDGET_SPACING),
    );

    let main_window = WindowDescription::new(root_widget)
        .title("To-do list")
        .window_size((400.0, 400.0));

    AppLauncher::with_window(main_window)
        .with_delegate(Delegate {
            next_task: String::new(),
        })
        .log_to_console()
        .launch()
        .expect("Failed to launch application");
}

#[test]
fn some_test_with_a_button() {
    let [button_id] = widget_ids();
    let widget = Button::new("Hello").with_id(button_id);

    let mut harness = TestHarness::create(widget);

    // Make a snapshot test of the visual contents of the window
    assert_render_snapshot!(harness, "hello");

    harness.edit_root_widget(|mut button, _| {
        let mut button = button.downcast::<Button>().unwrap();
        button.set_text("World");
    });

    // Make new snapshot test now that the window has changed
    assert_render_snapshot!(harness, "world");

    // References to widget automatically implement Debug, and
    // will print their part of the widget hierarchy.
    println!("Window contents: {:?}", harness.root_widget());

    // You can also use insta to snapshot-test the widget hierarchy
    assert_debug_snapshot!(harness.root_widget());

    // Clicking on a button will produce a "ButtonPressed" action.
    harness.mouse_click_on(button_id);
    assert_eq!(
        harness.pop_action(),
        Some((Action::ButtonPressed, button_id))
    );
}