On Pressed/Released Of Some Widgets

If we only consider mouse pressed or released events, we can use MouseArea. The MouseArea gives the widget being put in it the sense of mouse pressed/released events, even if the widget has no build-in support of the events. For example, we can make a Text to respond to mouse pressed/released events.

use iced::{Task, widget::mouse_area};

fn main() -> iced::Result {
    iced::application("My App", MyApp::update, MyApp::view).run_with(MyApp::new)
}

#[derive(Debug, Clone)]
enum Message {
    Pressed,
    Released,
}

#[derive(Default)]
struct MyApp {
    state: String,
}

impl MyApp {
    fn new() -> (Self, Task<Message>) {
        (
            Self {
                state: "Start".into(),
            },
            Task::none(),
        )
    }

    fn update(&mut self, message: Message) {
        match message {
            Message::Pressed => self.state = "Pressed".into(),
            Message::Released => self.state = "Released".into(),
        }
    }

    fn view(&self) -> iced::Element<Message> {
        mouse_area(self.state.as_str())
            .on_press(Message::Pressed)
            .on_release(Message::Released)
            .into()
    }
}