diff options
Diffstat (limited to 'examples/visible_bounds')
| -rw-r--r-- | examples/visible_bounds/Cargo.toml | 12 | ||||
| -rw-r--r-- | examples/visible_bounds/src/main.rs | 187 |
2 files changed, 199 insertions, 0 deletions
diff --git a/examples/visible_bounds/Cargo.toml b/examples/visible_bounds/Cargo.toml new file mode 100644 index 00000000..37594b84 --- /dev/null +++ b/examples/visible_bounds/Cargo.toml @@ -0,0 +1,12 @@ +[package] +name = "visible_bounds" +version = "0.1.0" +authors = ["Héctor Ramón Jiménez <hector0193@gmail.com>"] +edition = "2021" +publish = false + +[dependencies] +iced.workspace = true +iced.features = ["debug"] + +once_cell.workspace = true diff --git a/examples/visible_bounds/src/main.rs b/examples/visible_bounds/src/main.rs new file mode 100644 index 00000000..fdf1e0f9 --- /dev/null +++ b/examples/visible_bounds/src/main.rs @@ -0,0 +1,187 @@ +use iced::event::{self, Event}; +use iced::executor; +use iced::mouse; +use iced::theme::{self, Theme}; +use iced::widget::{ + column, container, horizontal_space, row, scrollable, text, vertical_space, +}; +use iced::window; +use iced::{ + Alignment, Application, Color, Command, Element, Font, Length, Point, + Rectangle, Settings, Subscription, +}; + +pub fn main() -> iced::Result { + Example::run(Settings::default()) +} + +struct Example { + mouse_position: Option<Point>, + outer_bounds: Option<Rectangle>, + inner_bounds: Option<Rectangle>, +} + +#[derive(Debug, Clone, Copy)] +enum Message { + MouseMoved(Point), + WindowResized, + Scrolled(scrollable::Viewport), + OuterBoundsFetched(Option<Rectangle>), + InnerBoundsFetched(Option<Rectangle>), +} + +impl Application for Example { + type Message = Message; + type Theme = Theme; + type Flags = (); + type Executor = executor::Default; + + fn new(_flags: Self::Flags) -> (Self, Command<Message>) { + ( + Self { + mouse_position: None, + outer_bounds: None, + inner_bounds: None, + }, + Command::none(), + ) + } + + fn title(&self) -> String { + String::from("Visible bounds - Iced") + } + + fn update(&mut self, message: Message) -> Command<Message> { + match message { + Message::MouseMoved(position) => { + self.mouse_position = Some(position); + + Command::none() + } + Message::Scrolled(_) | Message::WindowResized => { + Command::batch(vec![ + container::visible_bounds(OUTER_CONTAINER.clone()) + .map(Message::OuterBoundsFetched), + container::visible_bounds(INNER_CONTAINER.clone()) + .map(Message::InnerBoundsFetched), + ]) + } + Message::OuterBoundsFetched(outer_bounds) => { + self.outer_bounds = outer_bounds; + + Command::none() + } + Message::InnerBoundsFetched(inner_bounds) => { + self.inner_bounds = inner_bounds; + + Command::none() + } + } + } + + fn view(&self) -> Element<Message> { + let data_row = |label, value, color| { + row![ + text(label), + horizontal_space(Length::Fill), + text(value).font(Font::MONOSPACE).size(14).style(color), + ] + .height(40) + .align_items(Alignment::Center) + }; + + let view_bounds = |label, bounds: Option<Rectangle>| { + data_row( + label, + match bounds { + Some(bounds) => format!("{bounds:?}"), + None => "not visible".to_string(), + }, + if bounds + .zip(self.mouse_position) + .map(|(bounds, mouse_position)| { + bounds.contains(mouse_position) + }) + .unwrap_or_default() + { + Color { + g: 1.0, + ..Color::BLACK + } + .into() + } else { + theme::Text::Default + }, + ) + }; + + column![ + data_row( + "Mouse position", + match self.mouse_position { + Some(Point { x, y }) => format!("({x}, {y})"), + None => "unknown".to_string(), + }, + theme::Text::Default, + ), + view_bounds("Outer container", self.outer_bounds), + view_bounds("Inner container", self.inner_bounds), + scrollable( + column![ + text("Scroll me!"), + vertical_space(400), + container(text("I am the outer container!")) + .id(OUTER_CONTAINER.clone()) + .padding(40) + .style(theme::Container::Box), + vertical_space(400), + scrollable( + column![ + text("Scroll me!"), + vertical_space(400), + container(text("I am the inner container!")) + .id(INNER_CONTAINER.clone()) + .padding(40) + .style(theme::Container::Box), + vertical_space(400) + ] + .padding(20) + ) + .on_scroll(Message::Scrolled) + .width(Length::Fill) + .height(300), + ] + .padding(20) + ) + .on_scroll(Message::Scrolled) + .width(Length::Fill) + .height(300), + ] + .spacing(10) + .padding(20) + .into() + } + + fn subscription(&self) -> Subscription<Message> { + event::listen_with(|event, _| match event { + Event::Mouse(mouse::Event::CursorMoved { position }) => { + Some(Message::MouseMoved(position)) + } + Event::Window(_, window::Event::Resized { .. }) => { + Some(Message::WindowResized) + } + _ => None, + }) + } + + fn theme(&self) -> Theme { + Theme::Dark + } +} + +use once_cell::sync::Lazy; + +static OUTER_CONTAINER: Lazy<container::Id> = + Lazy::new(|| container::Id::new("outer")); +static INNER_CONTAINER: Lazy<container::Id> = + Lazy::new(|| container::Id::new("inner")); |