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Add support for mouse wheel

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This commit is contained in:
Ryan Goldstein 2019-05-31 21:50:34 -07:00
parent 37dadab745
commit 1409f83fb9
1 changed files with 24 additions and 3 deletions
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27
src/platform_impl/stdweb/event_loop.rs
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@ -1,7 +1,7 @@
use super::*;
use dpi::LogicalPosition;
use event::{DeviceId as RootDI, ElementState, Event, KeyboardInput, StartCause, WindowEvent};
use event::{DeviceId as RootDI, ElementState, Event, KeyboardInput, MouseScrollDelta, StartCause, TouchPhase, WindowEvent};
use event_loop::{ControlFlow, EventLoopWindowTarget as RootELW, EventLoopClosed};
use window::{WindowId as RootWI};
use stdweb::{
@ -151,12 +151,15 @@ impl<T> EventLoop<T> {
}
});
});
runner.send_event(Event::NewEvents(StartCause::Init));
stdweb::event_loop(); // TODO: this is only necessary for stdweb emscripten, should it be here?
// Throw an exception to break out of Rust exceution and use unreachable to tell the
// compiler this function won't return, giving it a return type of '!'
js! {
throw "Using exceptions for control flow, don't mind me";
throw "Using exceptions for control flow, don't mind me. This isn't actually an error!";
}
unreachable!();
}
@ -224,9 +227,27 @@ pub fn register<T: 'static>(elrs: &EventLoopRunnerShared<T>, canvas: &CanvasElem
}
});
});
add_event(elrs, canvas, |elrs, event: MouseWheelEvent| {
let x = event.delta_x();
let y = event.delta_y();
let delta = match event.delta_mode() {
MouseWheelDeltaMode::Line => MouseScrollDelta::LineDelta(x as f32, y as f32),
MouseWheelDeltaMode::Pixel => MouseScrollDelta::PixelDelta(LogicalPosition { x, y }),
MouseWheelDeltaMode::Page => return,
};
elrs.send_event(Event::WindowEvent {
window_id: RootWI(WindowId),
event: WindowEvent::MouseWheel {
device_id: RootDI(DeviceId(0)),
delta,
phase: TouchPhase::Moved,
modifiers: mouse_modifiers_state(&event)
}
});
});
}
fn add_event<T: 'static, E, F>(elrs: &EventLoopRunnerShared<T>, target: &impl IEventTarget, mut handler: F)
fn add_event<T: 'static, E, F>(elrs: &EventLoopRunnerShared<T>, target: &impl IEventTarget, mut handler: F)
where E: ConcreteEvent, F: FnMut(&EventLoopRunnerShared<T>, E) + 'static {
let elrs = elrs.clone();