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magnifier.js: Fix zoom juddering

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Make Zoom respond to the mouse silky-smoothly.

It was previously hard-coded to: 1000/50 = 20 FPS.

https://bugzilla.gnome.org/show_bug.cgi?id=682013
https://launchpad.net/bugs/1691675


(cherry picked from commit 94101e8bb8)
This commit is contained in:
Daniel van Vugt 2018-05-10 18:13:49 +08:00 committed by Marco Trevisan
parent 0ac0f7e85b
commit 9f76b6e4a2
1 changed files with 4 additions and 3 deletions
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7
js/ui/magnifier.js
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@ -19,7 +19,6 @@ const MagnifierDBus = imports.ui.magnifierDBus;
const Params = imports.misc.params;
const PointerWatcher = imports.ui.pointerWatcher;
var MOUSE_POLL_FREQUENCY = 50;
var CROSSHAIRS_CLIP_SIZE = [100, 100];
var NO_CHANGE = 0.0;
@ -152,8 +151,10 @@ var Magnifier = new Lang.Class({
* Turn on mouse tracking, if not already doing so.
*/
startTrackingMouse() {
if (!this._pointerWatch)
this._pointerWatch = PointerWatcher.getPointerWatcher().addWatch(MOUSE_POLL_FREQUENCY, this.scrollToMousePos.bind(this));
if (!this._pointerWatch) {
let interval = 1000 / Clutter.get_default_frame_rate();
this._pointerWatch = PointerWatcher.getPointerWatcher().addWatch(interval, this.scrollToMousePos.bind(this));
}
},
/**