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wayland: Support for wheel scrolling

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This commit is contained in:
Victor Berger 2016-10-16 22:33:39 +02:00
parent 44996acf94
commit db6b4606a1
1 changed files with 47 additions and 3 deletions
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50
src/api/wayland/context.rs
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@ -1,4 +1,4 @@
use {Event, ElementState, MouseButton};
use {Event, ElementState, MouseButton, MouseScrollDelta, TouchPhase};
use std::collections::VecDeque;
use std::sync::{Arc, Mutex};
@ -38,6 +38,9 @@ struct WaylandEnv {
mouse: Option<wl_pointer::WlPointer>,
mouse_focus: Option<Arc<Mutex<VecDeque<Event>>>>,
mouse_location: (i32, i32),
axis_buffer: Option<(f32, f32)>,
axis_discrete_buffer: Option<(i32, i32)>,
axis_state: TouchPhase,
kbd: Option<wl_keyboard::WlKeyboard>,
kbd_handler: KbdType
}
@ -78,6 +81,9 @@ impl WaylandEnv {
mouse: None,
mouse_focus: None,
mouse_location: (0,0),
axis_buffer: None,
axis_discrete_buffer: None,
axis_state: TouchPhase::Started,
kbd: None,
kbd_handler: kbd_handler
}
@ -450,8 +456,6 @@ impl wl_pointer::Handler for WaylandEnv {
}
}
// TODO: proper scroll handling
fn axis(&mut self,
_evqh: &mut EventQueueHandle,
_proxy: &wl_pointer::WlPointer,
@ -459,12 +463,41 @@ impl wl_pointer::Handler for WaylandEnv {
axis: wl_pointer::Axis,
value: f64)
{
let (mut x, mut y) = self.axis_buffer.unwrap_or((0.0, 0.0));
match axis {
wl_pointer::Axis::VerticalScroll => y += value as f32,
wl_pointer::Axis::HorizontalScroll => x += value as f32
}
self.axis_buffer = Some((x,y));
self.axis_state = match self.axis_state {
TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
_ => TouchPhase::Started
}
}
fn frame(&mut self,
_evqh: &mut EventQueueHandle,
_proxy: &wl_pointer::WlPointer)
{
let axis_buffer = self.axis_buffer.take();
let axis_discrete_buffer = self.axis_discrete_buffer.take();
if let Some(ref eviter) = self.mouse_focus {
if let Some((x, y)) = axis_discrete_buffer {
eviter.lock().unwrap().push_back(
Event::MouseWheel(
MouseScrollDelta::LineDelta(x as f32, y as f32),
self.axis_state
)
);
} else if let Some((x, y)) = axis_buffer {
eviter.lock().unwrap().push_back(
Event::MouseWheel(
MouseScrollDelta::PixelDelta(x as f32, y as f32),
self.axis_state
)
);
}
}
}
fn axis_source(&mut self,
@ -480,6 +513,7 @@ impl wl_pointer::Handler for WaylandEnv {
_time: u32,
axis: wl_pointer::Axis)
{
self.axis_state = TouchPhase::Ended;
}
fn axis_discrete(&mut self,
@ -488,6 +522,16 @@ impl wl_pointer::Handler for WaylandEnv {
axis: wl_pointer::Axis,
discrete: i32)
{
let (mut x, mut y) = self.axis_discrete_buffer.unwrap_or((0,0));
match axis {
wl_pointer::Axis::VerticalScroll => y += discrete,
wl_pointer::Axis::HorizontalScroll => x += discrete
}
self.axis_discrete_buffer = Some((x,y));
self.axis_state = match self.axis_state {
TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
_ => TouchPhase::Started
}
}
}