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Add manual-loop methods

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is_running() and step()
This commit is contained in:
Alexandre Bury 2016-12-15 20:24:48 +01:00
parent 858067ef6b
commit 2bacfcb11e
1 changed files with 57 additions and 36 deletions
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93
src/lib.rs
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@ -518,56 +518,77 @@ impl Cursive {
}
/// Returns `true` until [`quit(&mut self)`] is called.
///
/// [`quit(&mut self)`]: #method.quit
pub fn is_running(&self) -> bool {
self.running
}
/// Runs the event loop.
///
/// It will wait for user input (key presses)
/// and trigger callbacks accordingly.
///
/// Blocks until `quit()` is called.
/// Calls [`step(&mut self)`] until [`quit(&mut self)`] is called.
///
/// [`step(&mut self)`]: #method.step
/// [`quit(&mut self)`]: #method.quit
pub fn run(&mut self) {
// And the big event loop begins!
while self.running {
if let Ok(cb) = self.cb_source.try_recv() {
cb(self);
}
self.step();
}
}
// Do we need to redraw everytime?
// Probably, actually.
// TODO: Do we need to re-layout everytime?
self.layout();
/// Performs a single step from the event loop.
///
/// Useful if you need tighter control on the event loop.
/// Otherwise, [`run(&mut self)`] might be more convenient.
///
/// [`run(&mut self)`]: #method.run
pub fn step(&mut self) {
if let Ok(cb) = self.cb_source.try_recv() {
cb(self);
}
// TODO: Do we need to redraw every view every time?
// (Is this getting repetitive? :p)
self.draw();
self.backend.refresh();
// Do we need to redraw everytime?
// Probably, actually.
// TODO: Do we need to re-layout everytime?
self.layout();
// Wait for next event.
// (If set_fps was called, this returns -1 now and then)
let event = self.backend.poll_event();
if event == Event::Exit {
self.quit();
}
// TODO: Do we need to redraw every view every time?
// (Is this getting repetitive? :p)
self.draw();
self.backend.refresh();
if event == Event::WindowResize {
self.backend.clear();
}
// Wait for next event.
// (If set_fps was called, this returns -1 now and then)
let event = self.backend.poll_event();
if event == Event::Exit {
self.quit();
}
// Event dispatch order:
// * Focused element:
// * Menubar (if active)
// * Current screen (top layer)
// * Global callbacks
if self.menubar.receive_events() {
self.menubar.on_event(event).process(self);
} else {
match self.screen_mut().on_event(event) {
// If the event was ignored,
// it is our turn to play with it.
EventResult::Ignored => self.on_event(event),
EventResult::Consumed(None) => (),
EventResult::Consumed(Some(cb)) => cb(self),
}
if event == Event::WindowResize {
self.backend.clear();
}
// Event dispatch order:
// * Focused element:
// * Menubar (if active)
// * Current screen (top layer)
// * Global callbacks
if self.menubar.receive_events() {
self.menubar.on_event(event).process(self);
} else {
match self.screen_mut().on_event(event) {
// If the event was ignored,
// it is our turn to play with it.
EventResult::Ignored => self.on_event(event),
EventResult::Consumed(None) => (),
EventResult::Consumed(Some(cb)) => cb(self),
}
}
}