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51 lines
2.1 KiB
Plaintext
51 lines
2.1 KiB
Plaintext
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsIDOMEvent.idl"
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[scriptable, builtinclass, uuid(f5921a77-3ac5-4374-bc0c-1ed52fe83123)]
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interface nsIDOMDeviceOrientationEvent : nsIDOMEvent
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{
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void initDeviceOrientationEvent(in DOMString eventTypeArg,
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in boolean canBubbleArg,
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in boolean cancelableArg,
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in double alpha,
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in double beta,
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in double gamma,
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in boolean absolute);
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/*
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* W3C specification values: http://dev.w3.org/geo/api/spec-source-orientation.html
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*
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* Alpha, beta and gamma are Tait-Bryan angles (Z-X'-Y''), that is they correspond to
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* yaw, pitch and roll in flight coordinates. More specifically, assume the device
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* is resting face up on a flat surface (its screen is pointing straight up). Then
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* the X axis points to the right when looking at the screen, the Y axis points up
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* when looking at the screen, and the Z axis points toward you when looking at
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* the screen. Alpha/beta/gamma then define the device's orientation by applying
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* the following rotations to the device in order:
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*
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* 1) Rotate it by alpha degrees around its Z axis (like a compass, or like changing
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* the yaw of an aircraft, assuming the Y axis is the nose of the craft); alpha
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* is in [0,360).
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* 2) Rotate it by beta degrees around its X axis (tilting the top of the device
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* towards or away from you, like pitching an aircraft); beta is in [-180,180).
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* 3) Rotate it by gamma degrees around its Y axis (tilting it sideways, like
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* rolling an aircraft); gamma is in [-90,90).
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*/
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readonly attribute double alpha;
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readonly attribute double beta;
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readonly attribute double gamma;
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readonly attribute boolean absolute;
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};
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dictionary DeviceOrientationEventInit : EventInit
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{
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double alpha;
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double beta;
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double gamma;
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boolean absolute;
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};
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