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some minor refactoring...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2013-02-19 20:38:09 +04:00
parent 24272ae701
commit a04d21e132
1 changed files with 40 additions and 4 deletions
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44
layout.js
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@ -79,6 +79,9 @@ var togglePageView = createCSSClassToggler(
/************************************************** event handlers ***/
// XXX make this more universal...
// - h/v scroll
// - general configuration
// - optional events...
// XXX should we use a callback or an event???
function makeScrollHandler(root, callback){
@ -88,16 +91,37 @@ function makeScrollHandler(root, callback){
var touches = 0
var start
var prev_x
var prev_y
var prev_t
var bounds
var shift
var scale
var x
var y
var t
var dx
var dt
// XXX at this point this is not used...
var config = {
hScroll: true,
vScroll: false,
enableEvents: false,
autoCancelEvents: false,
eventBounds: 5,
}
function startMoveHandler(evt, callback){
prev_t = event.timeStamp || Date.now();
if(config.autoCancelEvents){
bounds = {
left: config.eventBounds,
right: root.width() - config.eventBounds,
top: config.eventBounds,
bottom: root.height() - config.eventBounds
}
}
setTransitionDuration($('.magazine'), 0)
if(event.touches != null){
touch = true
@ -123,10 +147,23 @@ function makeScrollHandler(root, callback){
// get the user coords...
x = touch ? event.touches[0].pageX : evt.clientX
touches = touch ? event.touches.length : 0
// XXX needs testing...
if(config.autoCancelEvents){
if(config.hScroll && (x <= bounds.left || x >= bounds.right)
|| config.vScroll && (y <= bounds.top || y >= bounds.bottom)){
// XXX cancel the touch event and trigger the end handler...
return endMoveHandler(evt)
}
}
// do the actual scroll...
if(scrolling){
shift += x - prev_x
setElementTransform($('.magazine'), shift, scale)
}
// XXX these should be done every time the event is caught or
// just while scrolling?
dx = x - prev_x
dt = t - prev_t
prev_t = t
@ -165,6 +202,7 @@ function makeScrollHandler(root, callback){
.on('touchstart', startMoveHandler)
.on('touchmove', moveHandler)
.on('touchend', endMoveHandler)
.on('touchcancel', endMoveHandler)
} else {
root
.on('mousedown', startMoveHandler)
@ -281,9 +319,8 @@ function setMagazineScale(scale){
var mag = $('.magazine')
var cur = $('.current.page')
// XXX make this check more unversal...
// center-align ribbon view pages...
var align = scale < 1 ? 'center' : null
var align = isNavigationViewRelative() ? 'center' : null
var left = getMagazineOffset(cur, scale, align)
@ -311,9 +348,8 @@ function setCurrentPage(n){
var cur = $('.current.page')
// XXX make this check more unversal...
// center-align pages in ribbon view...
var align = scale < 1 ? 'center' : null
var align = isNavigationViewRelative() ? 'center' : null
var left = getMagazineOffset(cur, null, align)