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Merge pull request #1352 from uklatt/master 

Limit mouse move events to one every 17 mS.
This commit is contained in:
Samuel Mannehed 2020-05-01 20:36:18 +02:00 committed by GitHub
parent e7fa686f32 44eb1fe59b
commit c9582690ac
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1 changed files with 15 additions and 1 deletions
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16
core/input/mouse.js
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@ -11,6 +11,7 @@ import { setCapture, stopEvent, getPointerEvent } from '../util/events.js';
const WHEEL_STEP = 10; // Delta threshold for a mouse wheel step
const WHEEL_STEP_TIMEOUT = 50; // ms
const WHEEL_LINE_HEIGHT = 19;
const MOUSE_MOVE_DELAY = 17; // Minimum wait (ms) between two mouse moves
export default class Mouse {
constructor(target) {
@ -22,6 +23,7 @@ export default class Mouse {
this._pos = null;
this._wheelStepXTimer = null;
this._wheelStepYTimer = null;
this._oldMouseMoveTime = 0;
this._accumulatedWheelDeltaX = 0;
this._accumulatedWheelDeltaY = 0;
@ -195,7 +197,19 @@ export default class Mouse {
_handleMouseMove(e) {
this._updateMousePosition(e);
this.onmousemove(this._pos.x, this._pos.y);
// Limit mouse move events to one every MOUSE_MOVE_DELAY ms
clearTimeout(this.mouseMoveTimer);
const newMouseMoveTime = Date.now();
if (newMouseMoveTime < this._oldMouseMoveTime + MOUSE_MOVE_DELAY) {
this.mouseMoveTimer = setTimeout(this.onmousemove.bind(this),
MOUSE_MOVE_DELAY,
this._pos.x, this._pos.y);
} else {
this.onmousemove(this._pos.x, this._pos.y);
}
this._oldMouseMoveTime = newMouseMoveTime;
stopEvent(e);
}