X-Git-Url: https://scm.cri.mines-paristech.fr/git/Portfolio.git/blobdiff_plain/e6d1eadd24491cb6194d217664169b0ab974034e..4d5ba04bc322584f7837abf736eb9e414bfc0e44:/skins/photo_film_viewer.js

diff --git a/skins/photo_film_viewer.js b/skins/photo_film_viewer.js
index 7561e24..0b1fde3 100644
--- a/skins/photo_film_viewer.js
+++ b/skins/photo_film_viewer.js
@@ -613,17 +613,46 @@ else if (browser.isIE6up) {
 
 FilmSlider.prototype.touchStartHandler = function(evt) {
 	this.filmStartX = parseInt(this.film.style.left, 10);
-	this.touchStartX = evt.pageX;
+	this.touchStartX = evt.changedTouches[0].screenX;
+	this.touchStartTime = (new Date()).getTime();
 };
 
 FilmSlider.prototype.touchMoveHandler = function(evt) {
 	disableDefault(evt);
-	var delta = this.touchStartX - evt.pageX;
+	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) {
+    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;
 };