From: Benoît Pin Date: Thu, 17 Jul 2014 13:25:33 +0000 (+0200) Subject: Inertie sur le glissement de la pellicule. X-Git-Url: https://svn.cri.ensmp.fr/git/Portfolio.git/commitdiff_plain/4d5ba04bc322584f7837abf736eb9e414bfc0e44?hp=ac93b62d919ba13d13ec3f5f2189776093483e53 Inertie sur le glissement de la pellicule. --- diff --git a/skins/photo_film_viewer.js b/skins/photo_film_viewer.js index 1ad17ce..0b1fde3 100644 --- a/skins/photo_film_viewer.js +++ b/skins/photo_film_viewer.js @@ -614,6 +614,7 @@ else if (browser.isIE6up) { FilmSlider.prototype.touchStartHandler = function(evt) { this.filmStartX = parseInt(this.film.style.left, 10); this.touchStartX = evt.changedTouches[0].screenX; + this.touchStartTime = (new Date()).getTime(); }; FilmSlider.prototype.touchMoveHandler = function(evt) { @@ -621,11 +622,36 @@ FilmSlider.prototype.touchMoveHandler = function(evt) { var delta = this.touchStartX - evt.changedTouches[0].screenX; var posX = this.filmStartX - delta; this.setFilmPosition(posX); + this.lastMoveTime = (new Date()).getTime(); }; FilmSlider.prototype.touchEndHandler = function(evt) { - if (evt.changedTouches[0].screenX !== this.touchStartX) { + var x = evt.changedTouches[0].screenX; + var delta = x - this.touchStartX; + if (delta) { disableDefault(evt); + var now = (new Date()).getTime(); + if (now - this.lastMoveTime < 100) { + // au delà de 100 ms de maintient, on annule l'inertie + var speed = delta / (now - this.touchStartTime) + var x0 = parseInt(this.film.style.left, 10); + var t0 = (new Date()).getTime(); + var d = 500; // milisecondes + var delta = 0; + var dt = 25 + var self = this; + + function animate() { + // inertie + var t = (new Date()).getTime() - t0; + if (t < d) { + setTimeout(animate, dt); + delta = delta + (1-t/d) * speed * dt; // décelleration linéaire + self.setFilmPosition(x0 + delta); + } + } + animate(); + } } this.touchStartX = undefined; };