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Implement WheelEvent Interface

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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.
This commit is contained in:
Robert Snakard 2019-02-24 21:24:36 +00:00 • committed by Josh Matthews
parent 8f11b52d9a
commit 35bca991ad
16 changed files with 347 additions and 146 deletions
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33
components/script/dom/webidls/WheelEvent.webidl Normal file
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
// https://w3c.github.io/uievents/#interface-wheelevent
[Constructor(DOMString typeArg, optional WheelEventInit wheelEventInitDict),
Exposed=Window]
interface WheelEvent : MouseEvent {
const unsigned long DOM_DELTA_PIXEL = 0x00;
const unsigned long DOM_DELTA_LINE = 0x01;
const unsigned long DOM_DELTA_PAGE = 0x02;
readonly attribute double deltaX;
readonly attribute double deltaY;
readonly attribute double deltaZ;
readonly attribute unsigned long deltaMode;
};
// https://w3c.github.io/uievents/#idl-wheeleventinit
dictionary WheelEventInit : MouseEventInit {
double deltaX = 0.0;
double deltaY = 0.0;
double deltaZ = 0.0;
unsigned long deltaMode = 0;
};
// https://w3c.github.io/uievents/#idl-interface-WheelEvent-initializers
partial interface WheelEvent {
// Deprecated in DOM Level 3
void initWheelEvent (DOMString typeArg, boolean bubblesArg, boolean cancelableArg,
Window? viewArg, long detailArg,
double deltaX, double deltaY,
double deltaZ, unsigned long deltaMode);
};