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environment: Patch in some implicit animation convenience

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Setting up implicit animations is more verbose than using tweener, in
particular when setting up callbacks to run on update or completion.
In order to make its use more convenient, monkey-patch ClutterActor
with an ease() method that works similarly to Tweener.addTween().

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/22
This commit is contained in:
Florian Müllner 2017-06-10 02:52:12 +02:00
parent 6c7dcd5ffd
commit 339797dbb4
1 changed files with 52 additions and 0 deletions
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52
js/ui/environment.js
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@ -63,6 +63,54 @@ function _adjustEasingTime(msecs) {
return St.get_slow_down_factor() * msecs;
}
function _easeActor(actor, props, easingParams) {
let { duration, delay, mode,
onStopped, onUpdate, onComplete } = easingParams;
let animatedProps = Object.keys(props).map(p => p.replace('_', '-', 'g'));
actor.save_easing_state();
if (duration)
actor.set_easing_duration(duration);
if (delay)
actor.set_easing_delay(delay);
if (mode)
actor.set_easing_mode(mode);
actor.set(props);
if (onUpdate || onComplete || onStopped) {
let transition = actor.get_transition(animatedProps[0]);
if (transition) {
let updateId = 0;
if (onUpdate)
updateId = transition.connect('new-frame', onUpdate);
let id = transition.connect('stopped', isFinished => {
if (updateId != 0)
transition.disconnect(updateId);
transition.disconnect(id);
if (onComplete)
onComplete();
if (onStopped)
onStopped(isFinished);
});
} else {
if (onComplete)
onComplete();
if (onStopped)
onStopped(true);
}
}
actor.restore_easing_state();
}
function _loggingFunc() {
let fields = {'MESSAGE': [].join.call(arguments, ', ')};
let domain = "GNOME Shell";
@ -108,6 +156,10 @@ function init() {
origSetEasingDelay.call(this, _adjustEasingTime(msecs));
};
Clutter.Actor.prototype.ease = function(props, easingParams) {
_easeActor(this, props, easingParams);
};
Clutter.Actor.prototype.toString = function() {
return St.describe_actor(this);
};