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loginDialog: Use GObject bindings over onUpdate handler

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Instead of iterating over all actors each frame and sync'ing their
opacities, we can set up bindings once before the animation.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/654
This commit is contained in:
Florian Müllner 2019-07-26 01:13:59 +00:00
parent bf497ed643
commit 3ee525833e
1 changed files with 14 additions and 16 deletions
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30
js/gdm/loginDialog.js
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@ -906,25 +906,29 @@ var LoginDialog = GObject.registerClass({
this._showPrompt();
}
_bindOpacity() {
this._bindings = Main.layoutManager.uiGroup.get_children()
.filter(c => c != Main.layoutManager.screenShieldGroup)
.map(c => this.bind_property('opacity', c, 'opacity', 0));
}
_unbindOpacity() {
this._bindings.forEach(b => b.unbind());
}
_loginScreenSessionActivated() {
if (this.opacity == 255 && this._authPrompt.verificationStatus == AuthPrompt.AuthPromptStatus.NOT_VERIFYING)
return;
this._bindOpacity();
Tweener.addTween(this,
{ opacity: 255,
time: _FADE_ANIMATION_TIME / 1000,
transition: 'easeOutQuad',
onUpdate: () => {
let children = Main.layoutManager.uiGroup.get_children();
for (let i = 0; i < children.length; i++) {
if (children[i] != Main.layoutManager.screenShieldGroup)
children[i].opacity = this.opacity;
}
},
onComplete: () => {
if (this._authPrompt.verificationStatus != AuthPrompt.AuthPromptStatus.NOT_VERIFYING)
this._authPrompt.reset();
this._unbindOpacity();
} });
}
@ -938,20 +942,14 @@ var LoginDialog = GObject.registerClass({
}
_startSession(serviceName) {
this._bindOpacity();
Tweener.addTween(this,
{ opacity: 0,
time: _FADE_ANIMATION_TIME / 1000,
transition: 'easeOutQuad',
onUpdate: () => {
let children = Main.layoutManager.uiGroup.get_children();
for (let i = 0; i < children.length; i++) {
if (children[i] != Main.layoutManager.screenShieldGroup)
children[i].opacity = this.opacity;
}
},
onComplete: () => {
this._greeter.call_start_session_when_ready_sync(serviceName, true, null);
this._unbindOpacity();
} });
}