Rename `clock` example to `events`

1 files changed, 129 insertions, 0 deletions

diff --git a/examples/events.rs b/examples/events.rs
new file mode 100644
index 00000000..290aa975
--- /dev/null
+++ b/examples/events.rs
@@ -0,0 +1,129 @@
+use iced::{
+    Align, Application, Checkbox, Column, Command, Container, Element, Length,
+    Settings, Subscription, Text,
+};
+
+pub fn main() {
+    env_logger::init();
+
+    Events::run(Settings::default())
+}
+
+#[derive(Debug, Default)]
+struct Events {
+    last: Vec<iced_native::Event>,
+    enabled: bool,
+}
+
+#[derive(Debug, Clone)]
+enum Message {
+    EventOccurred(iced_native::Event),
+    Toggled(bool),
+}
+
+impl Application for Events {
+    type Message = Message;
+
+    fn new() -> (Events, Command<Message>) {
+        (Events::default(), Command::none())
+    }
+
+    fn title(&self) -> String {
+        String::from("Events - Iced")
+    }
+
+    fn update(&mut self, message: Message) -> Command<Message> {
+        match message {
+            Message::EventOccurred(event) => {
+                self.last.push(event);
+
+                if self.last.len() > 5 {
+                    let _ = self.last.remove(0);
+                }
+            }
+            Message::Toggled(enabled) => {
+                self.enabled = enabled;
+            }
+        };
+
+        Command::none()
+    }
+
+    fn subscriptions(&self) -> Subscription<Message> {
+        if self.enabled {
+            events::all(Message::EventOccurred)
+        } else {
+            Subscription::none()
+        }
+    }
+
+    fn view(&mut self) -> Element<Message> {
+        let events = self.last.iter().fold(
+            Column::new().width(Length::Shrink).spacing(10),
+            |column, event| {
+                column.push(
+                    Text::new(format!("{:?}", event))
+                        .size(40)
+                        .width(Length::Shrink),
+                )
+            },
+        );
+
+        let toggle = Checkbox::new(self.enabled, "Enabled", Message::Toggled)
+            .width(Length::Shrink);
+
+        let content = Column::new()
+            .width(Length::Shrink)
+            .align_items(Align::Center)
+            .spacing(20)
+            .push(events)
+            .push(toggle);
+
+        Container::new(content)
+            .width(Length::Fill)
+            .height(Length::Fill)
+            .center_x()
+            .center_y()
+            .into()
+    }
+}
+
+mod events {
+    use std::sync::Arc;
+
+    pub fn all<Message>(
+        f: impl Fn(iced_native::Event) -> Message + 'static + Send + Sync,
+    ) -> iced::Subscription<Message>
+    where
+        Message: Send + 'static,
+    {
+        All(Arc::new(f)).into()
+    }
+
+    struct All<Message>(
+        Arc<dyn Fn(iced_native::Event) -> Message + Send + Sync>,
+    );
+
+    impl<Message> iced_native::subscription::Connection for All<Message>
+    where
+        Message: 'static,
+    {
+        type Input = iced_native::subscription::Input;
+        type Output = Message;
+
+        fn id(&self) -> u64 {
+            0
+        }
+
+        fn stream(
+            &self,
+            input: iced_native::subscription::Input,
+        ) -> futures::stream::BoxStream<'static, Message> {
+            use futures::StreamExt;
+
+            let function = self.0.clone();
+
+            input.map(move |event| function(event)).boxed()
+        }
+    }
+}