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-rw-r--r--src/lib.rs38
1 files changed, 30 insertions, 8 deletions
diff --git a/src/lib.rs b/src/lib.rs
index fb551c8..436c0cf 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -537,22 +537,22 @@ impl Window {
self.window.set_inner_size(x, y)
}
- /// Returns an iterator to all the events that are currently in the window's events queue.
+ /// Returns an iterator that poll for the next event in the window's events queue.
+ /// Returns `None` if there is no event in the queue.
///
/// Contrary to `wait_events`, this function never blocks.
#[inline]
pub fn poll_events(&self) -> PollEventsIterator {
- PollEventsIterator { data: self.window.poll_events().into_iter() }
+ PollEventsIterator { window: self, data: self.window.poll_events().into_iter() }
}
- /// Waits for an event, then returns an iterator to all the events that are currently
- /// in the window's events queue.
+ /// Returns an iterator that returns events one by one, blocking if necessary until one is
+ /// available.
///
- /// If there are no events in queue when you call the function,
- /// this function will block until there is one.
+ /// The iterator never returns `None`.
#[inline]
pub fn wait_events(&self) -> WaitEventsIterator {
- WaitEventsIterator { data: self.window.wait_events().into_iter() }
+ WaitEventsIterator { window: self, data: self.window.wait_events().into_iter() }
}
/// Sets the context as the current context.
@@ -704,13 +704,24 @@ impl gl_common::GlFunctionsSource for HeadlessContext {
/// An iterator for the `poll_events` function.
// Implementation note: we retreive the list once, then serve each element by one by one.
// This may change in the future.
+#[cfg(feature = "window")]
pub struct PollEventsIterator<'a> {
+ window: &'a Window,
data: RingBufIter<Event>,
}
+#[cfg(feature = "window")]
impl<'a> Iterator for PollEventsIterator<'a> {
type Item = Event;
fn next(&mut self) -> Option<Event> {
+ if let Some(ev) = self.data.next() {
+ return Some(ev);
+ }
+
+ let PollEventsIterator { window, data } = self.window.poll_events();
+ self.window = window;
+ self.data = data;
+
self.data.next()
}
}
@@ -718,14 +729,25 @@ impl<'a> Iterator for PollEventsIterator<'a> {
/// An iterator for the `wait_events` function.
// Implementation note: we retreive the list once, then serve each element by one by one.
// This may change in the future.
+#[cfg(feature = "window")]
pub struct WaitEventsIterator<'a> {
+ window: &'a Window,
data: RingBufIter<Event>,
}
+#[cfg(feature = "window")]
impl<'a> Iterator for WaitEventsIterator<'a> {
type Item = Event;
fn next(&mut self) -> Option<Event> {
- self.data.next()
+ if let Some(ev) = self.data.next() {
+ return Some(ev);
+ }
+
+ let WaitEventsIterator { window, data } = self.window.wait_events();
+ self.window = window;
+ self.data = data;
+
+ self.next()
}
}