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Implement WheelEvent Interface
Note: The WheelEvent interface supports rotation in all 3 spatial dimensions. This implementation only supports two due to limitations in the Glutin compositor. The wheelevent interface is a dom interface that triggers for any attached device that can rotate in one or more spatial dimensions. Traditionally this is the mouse wheel though other devices could be used as well. E.g. the trackball on a trackball mouse.
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8f11b52d9a
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16 changed files with 347 additions and 146 deletions
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@ -26,9 +26,11 @@ use num_traits::FromPrimitive;
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#[cfg(feature = "gl")]
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use pixels::PixelFormat;
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use profile_traits::time::{self as profile_time, profile, ProfilerCategory};
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use script_traits::CompositorEvent::{MouseButtonEvent, MouseMoveEvent, TouchEvent};
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use script_traits::CompositorEvent::{MouseButtonEvent, MouseMoveEvent, TouchEvent, WheelEvent};
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use script_traits::{AnimationState, AnimationTickType, ConstellationMsg, LayoutControlMsg};
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use script_traits::{MouseButton, MouseEventType, ScrollState, TouchEventType, TouchId};
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use script_traits::{
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MouseButton, MouseEventType, ScrollState, TouchEventType, TouchId, WheelDelta,
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};
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use script_traits::{UntrustedNodeAddress, WindowSizeData, WindowSizeType};
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use servo_geometry::DeviceIndependentPixel;
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use std::collections::HashMap;
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@ -792,6 +794,22 @@ impl<Window: WindowMethods + ?Sized> IOCompositor<Window> {
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}
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}
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pub fn send_wheel_event(&mut self, delta: WheelDelta, point: DevicePoint) {
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let results = self.hit_test_at_point(point);
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if let Some(item) = results.items.first() {
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let event = WheelEvent(
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delta,
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item.point_in_viewport.to_untyped(),
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Some(UntrustedNodeAddress(item.tag.0 as *const c_void)),
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);
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let pipeline_id = PipelineId::from_webrender(item.pipeline);
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let msg = ConstellationMsg::ForwardEvent(pipeline_id, event);
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if let Err(e) = self.constellation_chan.send(msg) {
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warn!("Sending event to constellation failed ({:?}).", e);
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}
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}
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}
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pub fn on_touch_event(
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&mut self,
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event_type: TouchEventType,
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@ -858,6 +876,10 @@ impl<Window: WindowMethods + ?Sized> IOCompositor<Window> {
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self.dispatch_mouse_window_event_class(MouseWindowEvent::Click(button, p));
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}
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pub fn on_wheel_event(&mut self, delta: WheelDelta, p: DevicePoint) {
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self.send_wheel_event(delta, p);
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}
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pub fn on_scroll_event(
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&mut self,
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delta: ScrollLocation,
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@ -10,7 +10,7 @@ use euclid::TypedScale;
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use gleam::gl;
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use keyboard_types::KeyboardEvent;
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use msg::constellation_msg::{PipelineId, TopLevelBrowsingContextId, TraversalDirection};
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use script_traits::{MouseButton, TouchEventType, TouchId};
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use script_traits::{MouseButton, TouchEventType, TouchId, WheelDelta};
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use servo_geometry::DeviceIndependentPixel;
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use servo_url::ServoUrl;
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use std::fmt::{Debug, Error, Formatter};
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@ -65,6 +65,8 @@ pub enum WindowEvent {
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MouseWindowMoveEventClass(DevicePoint),
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/// Touch event: type, identifier, point
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Touch(TouchEventType, TouchId, DevicePoint),
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/// Sent when user moves the mouse wheel.
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Wheel(WheelDelta, DevicePoint),
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/// Sent when the user scrolls. The first point is the delta and the second point is the
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/// origin.
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Scroll(ScrollLocation, DeviceIntPoint, TouchEventType),
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@ -113,6 +115,7 @@ impl Debug for WindowEvent {
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WindowEvent::MouseWindowEventClass(..) => write!(f, "Mouse"),
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WindowEvent::MouseWindowMoveEventClass(..) => write!(f, "MouseMove"),
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WindowEvent::Touch(..) => write!(f, "Touch"),
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WindowEvent::Wheel(..) => write!(f, "Wheel"),
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WindowEvent::Scroll(..) => write!(f, "Scroll"),
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WindowEvent::Zoom(..) => write!(f, "Zoom"),
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WindowEvent::PinchZoom(..) => write!(f, "PinchZoom"),
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