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Add Tweener.slowDownFactor, initialize from $GNOME_SHELL_SLOWDOWN_FACTOR

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This allows for easier debugging of glitchy animations
This commit is contained in:
Dan Winship 2009-09-01 13:27:31 -04:00
parent 304b377dae
commit 3e54087e42
1 changed files with 13 additions and 5 deletions
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18
js/ui/tweener.js
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@ -1,6 +1,7 @@
/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
const Clutter = imports.gi.Clutter;
const GLib = imports.gi.GLib;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Signals = imports.signals;
@ -41,9 +42,17 @@ const Tweener = imports.tweener.tweener;
// calls any of these is almost certainly wrong anyway, because they
// affect the entire application.)
let slowDownFactor = 1.0;
// Called from Main.start
function init() {
let slowdownEnv = GLib.getenv("GNOME_SHELL_SLOWDOWN_FACTOR");
if (slowdownEnv) {
let factor = parseFloat(slowdownEnv);
if (!isNaN(factor) && factor > 0.0)
slowDownFactor = factor;
}
Tweener.setFrameTicker(new ClutterFrameTicker());
}
@ -208,11 +217,10 @@ ClutterFrameTicker.prototype = {
this._startTime = -1;
this._currentTime = -1;
let me = this;
this._timeline.connect('new-frame',
this._timeline.connect('new-frame', Lang.bind(this,
function(timeline, frame) {
me._onNewFrame(frame);
});
this._onNewFrame(frame);
}));
},
_onNewFrame : function(frame) {
@ -225,7 +233,7 @@ ClutterFrameTicker.prototype = {
this._startTime = this._timeline.get_elapsed_time();
// currentTime is in milliseconds
this._currentTime = this._timeline.get_elapsed_time() - this._startTime;
this._currentTime = (this._timeline.get_elapsed_time() - this._startTime) / slowDownFactor;
this.emit('prepare-frame');
},