1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
var Scroller = (function(){
var Scroller = {}
var prev, next, left, right, burger
var webkitRatio = 1
Scroller.init = function(opt){
previous = opt.previous
next = opt.next
burger = opt.burger
left = opt.left
right = opt.right
if (is_mobile) {
document.body.addEventListener("touchstart", touchstart)
document.body.addEventListener("touchmove", touchmove)
document.body.addEventListener("touchend", touchend)
}
else {
document.body.addEventListener("wheel", wheelDelta)
document.body.addEventListener("keydown", keydown)
}
}
var touching = false, touchStartTime, touchStartY, touchEndY, touchDist, touchScrollTop
var touchAdvanceDistance = 60
var touchFadeDistance = 60
var $items = $("#items")[0]
function touchstart (e) {
touching = true
touchStartTime = +(new Date)
touchStartY = touchEndY = e.touches ? e.touches[0].pageY : e.pageY
// $items.className = "no-tween"
}
function touchmove (e) {
if (! touching) return
e.preventDefault()
var timestamp = +(new Date)
var duration = timestamp - touchStartTime
touchEndY = e.touches ? e.touches[0].pageY : e.pageY
touchDist = touchStartY - touchEndY
var touchAbs = Math.abs(touchDist)
if (touchAbs > touchAdvanceDistance) {
// touchend(e)
// touchAbs -= 9
// $items.style.opacity = clamp(1-touchAbs / (touchFadeDistance * 2), 0, 1)
// touchAbs *= -sign(touchDist)
// touchAbs /= 2
// $items.style[transformProp] = "translateZ(0) translateY(" + touchAbs + "px)"
}
}
function touchend (e) {
if (! touching) return
e.preventDefault()
touching = false
var timestamp = +(new Date)
var duration = timestamp - touchStartTime
touchDist = touchStartY - touchEndY
console.log("DURATION >>", duration, touchDist)
if ( (duration < 120 && Math.abs(touchDist) < 10) || Math.abs(touchDist) >= touchAdvanceDistance) {
touchDist > 0 ? step(1) : step(-1)
}
// $items.className = ""
// setTimeout(function(){
// $items.style[transformProp] = "translateZ(0) translateY(0)"
// if (Math.abs(touchDist) >= touchAdvanceDistance) {
// $items.style.opacity = 0
// setTimeout(function(){
// $items.style.opacity = 1
// }, 200)
// }
// else {
// $items.style.opacity = 1
// }
// }, 0)
}
function wheelDelta (e){
e.preventDefault()
var deltaY = 0
// WebKit
if ( e.deltaY ) {
deltaY += e.deltaY * webkitRatio
}
else if ( e.wheelDeltaY ) {
deltaY += e.wheelDeltaY * webkitRatio
}
// Opera / Explorer 9
else if ( e.wheelDelta ) {
deltaY += e.wheelDelta * webkitRatio
}
// Firefox
else if ( e.detail ) {
deltaY -= e.detail * 2
}
wheel(deltaY)
}
var lastScrollEvent = +new Date(), lastDY = 0, lastSign = 0
function wheel (dy) {
if (isNaN(dy)) return
var now = +new Date(), newSign = sign(dy)
if ((now > lastScrollEvent + 300) ||
(lastSign !== newSign && Math.abs(dy) > Math.abs(lastDY*2)) ||
(lastSign === newSign && Math.log(Math.abs(dy)) > 1+Math.log(Math.abs(lastDY)))) {
step(sign(dy))
}
lastDY = dy
lastSign = newSign
lastScrollEvent = now
}
function step (n) {
var now = +new Date()
if (now < lastScrollEvent + 300) {
return
}
lastScrollEvent = now
if (n < 0) {
previous()
}
else {
next()
}
}
function keydown (e) {
console.log(e.keyCode)
switch (e.keyCode) {
case 37: // left
e.preventDefault()
left()
break
case 39: // right
e.preventDefault()
right()
break
case 27: // esc
e.preventDefault()
burger()
break
case 32: // space
e.preventDefault()
step(1)
break
case 36: // home
e.preventDefault()
break
case 35: // end
e.preventDefault()
break
case 33: // page up
case 38: // up
e.preventDefault()
step(-1)
break
case 34: // page down
case 40: // down
e.preventDefault()
step(1)
break
}
}
return Scroller
})()
|
