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TouchScroll.js
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TouchScroll.js
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/*=====
// summary:
// Utility for enabling touch scrolling capability.
// description:
// Mobile WebKit browsers do not allow scrolling inner DIVs. (You need
// the two-finger operation to scroll them.)
// That means you cannot have fixed-positioned header/footer bars.
// To solve this issue, this module disables the browsers default scrolling
// behavior, and re-builds its own scrolling machinery by handling touch
// events. In this module, this.domNode has height "100%" and is fixed to
// the window, and this.containerNode scrolls. If you place a bar outside
// of this.containerNode, then it will be fixed-positioned while
// this.containerNode is scrollable.
//
// This module has the following features:
// - Scrolls inner DIVs vertically, horizontally, or both.
// - Vertical and horizontal scroll bars.
// - Flashes the scroll bars when a view is shown.
// - Simulates the flick operation using animation.
// - Respects header/footer bars if any.
//
// dojoMobile.scrollable is a simple function object, which holds
// several properties and functions in it. But if you transform it to a
// dojo class, it can be used as a mix-in class for any custom dojo
// widgets. dojoMobile._ScrollableMixin is such a class.
//
// Also, it can be used even for non-dojo applications. In such cases,
// several dojo APIs used in this module, such as dojo.connect,
// dojo.create, etc., are re-defined so that the code works without dojo.
// When in dojo, of course those re-defined functions are not necessary.
// So, they are surrounded by the excludeStart and excludeEnd directives
// so that they will be excluded from the build.
//
// If you use this module for non-dojo application, you need to explicitly
// assign your outer fixed node and inner scrollable node to this.domNode
// and this.containerNode respectively.
//
// example:
// Use this module from a non-dojo applicatoin:
// | function onLoad(){
// | var scrollable = new dojoMobile.scrollable();
// | scrollable.init({
// | domNode: "outer", // id or node
// | containerNode: "inner", // id or node
// | fixedHeaderHeight: document.getElementById("hd1").offsetHeight
// | });
// | }
// | <body onload="onLoad()">
// | <h1 id="hd1" style="position:absolute;width:100%;z-index:1;">
// | Fixed Header
// | </h1>
// | <div id="outer" style="height:100%;overflow:hidden;">
// | <div id="inner" style="position:absolute;width:100%;">
// | ... content ...
// | </div>
// | </div>
// | </body>
//
=====*/
define([], function(){
var dojo = {isWebKit: true};
var dojoMobile = {};
var elem = document.createElement("div");
elem.style.webkitTransform = "translate3d(0px,1px,0px)";
document.documentElement.appendChild(elem);
var v = document.defaultView.getComputedStyle(elem, '')["-webkit-transform"];
dojoMobile.hasTranslate3d = v && v.indexOf("matrix") === 0;
document.documentElement.removeChild(elem);
dojoMobile.hasTouch = (typeof document.documentElement.ontouchstart != "undefined" &&
navigator.appVersion.indexOf("Mobile") != -1);
return function(){
this.fixedHeaderHeight = 0; // height of a fixed header
this.fixedFooterHeight = 0; // height of a fixed footer
this.isLocalFooter = false; // footer is view-local (as opposed to application-wide)
this.scrollBar = true; // show scroll bar or not
this.scrollDir = "v"; // v: vertical, h: horizontal, vh: both, f: flip
this.weight = 0.6; // frictional drag
this.fadeScrollBar = true;
this.disableFlashScrollBar = false;
dojo.connect = function(node, eventName, scope, method){
var handler = function(e){
e = e || window.event;
if(!e.target){
e.target = e.srcElement;
e.pageX = e.offsetX;
e.pageY = e.offsetY;
}
scope[method](e);
};
if(node.addEventListener){
node.addEventListener(eventName.replace(/^on/,""), handler, false);
}else{
node.attachEvent(eventName, handler);
}
return {node:node, eventName:eventName, handler:handler};
};
dojo.disconnect = function(handle){
if(handle.node.removeEventListener){
handle.node.removeEventListener(handle.eventName.replace(/^on/,""), handle.handler, false);
}else{
handle.node.detachEvent(handle.eventName, handle.handler);
}
};
dojo.create = function(tag, attrs, refNode){
return refNode.appendChild(document.createElement(tag));
};
dojo.stopEvent = function(evt){
if(evt.preventDefault){
evt.preventDefault();
evt.stopPropagation();
}else{
evt.cancelBubble = true;
}
return false;
};
dojo.style = function(node, style){
for(var s in style){
if(style.hasOwnProperty(s)){
node.style[s] = style[s];
if(s == "opacity" && typeof(node.style.filter) != "undefined"){
node.style.filter = " progid:DXImageTransform.Microsoft.alpha(opacity="+ (style[s]*100) +")";
}
}
}
};
dojo.hasClass = function(node, s){
return (node.className.indexOf(s) != -1);
};
dojo.addClass = function(node, s){
if(!dojo.hasClass(node, s)){
node.className += " " + s;
}
};
dojo.removeClass = function(node, s){
node.className = node.className.replace(" " + s, "");
};
this.init = function(/*Object?*/params){
if (params){
for(var p in params){
if (params.hasOwnProperty(p)) {
this[p] = ((p == "domNode" || p == "containerNode") && typeof params[p] == "string") ?
document.getElementById(params[p]) : params[p]; // mix-in params
}
}
}
this._v = (this.scrollDir.indexOf("v") != -1); // vertical scrolling
this._h = (this.scrollDir.indexOf("h") != -1); // horizontal scrolling
this._f = (this.scrollDir == "f"); // flipping views
this._appFooterHeight = (this.fixedFooterHeight && !this.isLocalFooter) ?
this.fixedFooterHeight : 0;
this._ch = []; // connect handlers
this._ch.push(dojo.connect(this.containerNode,
dojoMobile.hasTouch ? "touchstart" : "onmousedown", this, "onTouchStart"));
if(dojo.isWebKit){
this._ch.push(dojo.connect(this.containerNode, "webkitAnimationEnd", this, "onFlickAnimationEnd"));
this._ch.push(dojo.connect(this.containerNode, "webkitAnimationStart", this, "onFlickAnimationStart"));
}
// this.containerNode.style.paddingTop = this.fixedHeaderHeight + "px";
/* if(window.onorientationchange !== undefined){
this._ch.push(dojo.connect(window, "onorientationchange", this, "resizeView"));
}else{
this._ch.push(dojo.connect(window, "onresize", this, "resizeView"));
}
this.resizeView();*/
var _this = this;
setTimeout(function(){
_this.flashScrollBar();
}, 600);
};
this.cleanup = function(){
for(var i = 0; i < this._ch.length; i++){
dojo.disconnect(this._ch[i]);
}
this._ch = null;
};
this.resizeView = function(e){
// has to wait a little for completion of hideAddressBar()
var c = 0;
var _this = this;
var id = setInterval(function() {
// adjust the height of this view a couple of times
_this.domNode.style.height = (window.innerHeight||document.documentElement.clientHeight) - _this._appFooterHeight + "px";
_this.resetScrollBar();
if(c++ >= 4) { clearInterval(id); }
}, 300);
};
this.onFlickAnimationStart = function(e){
dojo.stopEvent(e);
};
this.onFlickAnimationEnd = function(e){
if(e && e.srcElement){
dojo.stopEvent(e);
}
this.stopAnimation();
if(this._bounce){
var _this = this;
var bounce = _this._bounce;
setTimeout(function(){
_this.slideTo(bounce, 0.3, "ease-out");
}, 0);
_this._bounce = undefined;
}else{
this.hideScrollBar();
this.removeCover();
}
};
this.onTouchStart = function(e){
if(this._conn && (new Date()).getTime() - this.startTime < 500){
return; // ignore successive onTouchStart calls
}
if(!this._conn){
this._conn = [];
this._conn.push(dojo.connect(document, dojoMobile.hasTouch ? "touchmove" : "onmousemove", this, "onTouchMove"));
this._conn.push(dojo.connect(document, dojoMobile.hasTouch ? "touchend" : "onmouseup", this, "onTouchEnd"));
}
this._aborted = false;
if(dojo.hasClass(this.containerNode, "mblScrollableScrollTo2")){
this.abort();
}
this.touchStartX = e.touches ? e.touches[0].pageX : e.clientX;
this.touchStartY = e.touches ? e.touches[0].pageY : e.clientY;
this.startTime = (new Date()).getTime();
this.startPos = this.getPos();
this._dim = this.getDim();
this._time = [0];
this._posX = [this.touchStartX];
this._posY = [this.touchStartY];
if(e.target.nodeType != 1 || (e.target.tagName != "SELECT" && e.target.tagName != "INPUT")){
dojo.stopEvent(e);
}
};
this.onTouchMove = function(e){
var x = e.touches ? e.touches[0].pageX : e.clientX;
var y = e.touches ? e.touches[0].pageY : e.clientY;
var dx = x - this.touchStartX;
var dy = y - this.touchStartY;
var to = {x:this.startPos.x + dx, y:this.startPos.y + dy};
var dim = this._dim;
if(this._time.length == 1){ // the first TouchMove after TouchStart
this.addCover();
this.showScrollBar();
}
var weight = this.weight;
if(this._v){
if(to.y > 0){ // content is below the screen area
to.y = Math.round(to.y * weight);
}else if(to.y < -dim.o.h){ // content is above the screen area
if(dim.c.h < dim.d.h){ // content is shorter than display
to.y = Math.round(to.y * weight);
}else{
to.y = -dim.o.h - Math.round((-dim.o.h - to.y) * weight);
}
}
}
if(this._h || this._f){
if(to.x > 0){
to.x = Math.round(to.x * weight);
}else if(to.x < -dim.o.w){
if(dim.c.w < dim.d.w){
to.x = Math.round(to.x * weight);
}else{
to.x = -dim.o.w - Math.round((-dim.o.w - to.x) * weight);
}
}
}
this.scrollTo(to);
var max = 10;
var n = this._time.length; // # of samples
if(n >= 2){
// Check the direction of the finger move.
// If the direction has been changed, discard the old data.
var d0, d1;
if(this._v && !this._h){
d0 = this._posY[n - 1] - this._posY[n - 2];
d1 = y - this._posY[n - 1];
}else if(!this._v && this._h){
d0 = this._posX[n - 1] - this._posX[n - 2];
d1 = x - this._posX[n - 1];
}
if(d0 * d1 < 0){ // direction changed
// leave only the latest data
this._time = [this._time[n - 1]];
this._posX = [this._posX[n - 1]];
this._posY = [this._posY[n - 1]];
n = 1;
}
}
if(n == max){
this._time.shift();
this._posX.shift();
this._posY.shift();
}
this._time.push((new Date()).getTime() - this.startTime);
this._posX.push(x);
this._posY.push(y);
};
this.onTouchEnd = function(e){
if(!this._conn){ return; } // if we get onTouchEnd without onTouchStart, ignore it.
for(var i = 0; i < this._conn.length; i++){
dojo.disconnect(this._conn[i]);
}
this._conn = null;
var n = this._time.length; // # of samples
var clicked = false;
if(!this._aborted){
if(n <= 1){
clicked = true;
}else if(n == 2 && Math.abs(this._posY[1] - this._posY[0]) < 4){
clicked = true;
}
}
if(clicked){ // clicked, not dragged or flicked
this.hideScrollBar();
this.removeCover();
if(dojoMobile.hasTouch){
var elem = e.target;
if(elem.nodeType != 1){
elem = elem.parentNode;
}
var ev = document.createEvent("MouseEvents");
ev.initEvent("click", true, true);
elem.dispatchEvent(ev);
}
return;
}
var speed = {x:0, y:0};
// if the user holds the mouse or finger more than 0.5 sec, do not move.
if(n >= 2 && (new Date()).getTime() - this.startTime - this._time[n - 1] < 500){
var dy = this._posY[n - (n > 3 ? 2 : 1)] - this._posY[(n - 6) >= 0 ? n - 6 : 0];
var dx = this._posX[n - (n > 3 ? 2 : 1)] - this._posX[(n - 6) >= 0 ? n - 6 : 0];
var dt = this._time[n - (n > 3 ? 2 : 1)] - this._time[(n - 6) >= 0 ? n - 6 : 0];
speed.y = this.calcSpeed(dy, dt);
speed.x = this.calcSpeed(dx, dt);
}
var pos = this.getPos();
var to = {}; // destination
var dim = this._dim;
var velocity = Math.sqrt(speed.x+speed.x + speed.y*speed.y);;
if(this._v){
to.y = pos.y + speed.y * velocity / 200;
}
if(this._h || this._f){
to.x = pos.x + speed.x * velocity / 200;
}
if(this.scrollDir == "v" && dim.c.h <= dim.d.h){ // content is shorter than display
this.slideTo({y:0}, 0.3, "ease-out"); // go back to the top
return;
}else if(this.scrollDir == "h" && dim.c.w <= dim.d.w){ // content is narrower than display
this.slideTo({x:0}, 0.3, "ease-out"); // go back to the left
return;
}else if(this._v && this._h && dim.c.h <= dim.d.h && dim.c.w <= dim.d.w){
this.slideTo({x:0, y:0}, 0.3, "ease-out"); // go back to the top-left
return;
}
var duration, easing = "ease-out";
var bounce = {};
if(this._v){
if(to.y > 0){ // going down. bounce back to the top.
if(pos.y > 0){ // started from below the screen area. return quickly.
duration = 0.3;
to.y = 0;
}else{
to.y = Math.min(to.y, 20);
easing = "linear";
bounce.y = 0;
}
}else if(-speed.y > dim.o.h - (-pos.y)){ // going up. bounce back to the bottom.
if(pos.y < -dim.o.h){ // started from above the screen top. return quickly.
duration = 0.3;
to.y = dim.c.h <= dim.d.h ? 0 : -dim.o.h; // if shorter, move to 0
}else{
to.y = Math.max(to.y, -dim.o.h - 20);
easing = "linear";
bounce.y = -dim.o.h;
}
}
}
if(this._h || this._f){
if(to.x > 0){ // going right. bounce back to the left.
if(pos.x > 0){ // started from right of the screen area. return quickly.
duration = 0.3;
to.x = 0;
}else{
to.x = Math.min(to.x, 20);
easing = "linear";
bounce.x = 0;
}
}else if(-speed.x > dim.o.w - (-pos.x)){ // going left. bounce back to the right.
if(pos.x < -dim.o.w){ // started from left of the screen top. return quickly.
duration = 0.3;
to.x = dim.c.w <= dim.d.w ? 0 : -dim.o.w; // if narrower, move to 0
}else{
to.x = Math.max(to.x, -dim.o.w - 20);
easing = "linear";
bounce.x = -dim.o.w;
}
}
}
this._bounce = (bounce.x !== undefined || bounce.y !== undefined) ? bounce : undefined;
if(duration === undefined){
var distance, velocity;
if(this._v && this._h){
distance = Math.sqrt(Math.pow(to.y - pos.y, 2) + Math.pow(to.x - pos.x, 2));
}else if(this._v){
distance = to.y - pos.y;
}else if(this._h){
distance = to.x - pos.x;
}
duration = velocity !== 0 ? Math.abs(distance / velocity) : 0.01; // time = distance / velocity
}
this.slideTo(to, duration, easing);
};
this.abort = function(){
this.scrollTo(this.getPos());
this.stopAnimation();
this._aborted = true;
};
this.stopAnimation = function(){
// stop the currently running animation
dojo.removeClass(this.containerNode, "mblScrollableScrollTo2");
if(this._scrollBarV){
this._scrollBarV.className = "";
}
if(this._scrollBarH){
this._scrollBarH.className = "";
}
};
this.calcSpeed = function(/*Number*/d, /*Number*/t){
return Math.round(d / t * 100) * 4;
};
var time;
this.scrollTo = function(/*Object*/to, /*?Boolean*/doNotMoveScrollBar){ // to: {x, y}
now = new Date().getTime()
//console.log("scrollTo" + (now - time));
time = now;
var s = this.containerNode.style;
if(dojo.isWebKit){
s.webkitTransform = this.makeTranslateStr(to);
}else{
if(this._v){
s.top = to.y + "px";
}
if(this._h || this._f){
s.left = to.x + "px";
}
}
if(!doNotMoveScrollBar){
this.scrollScrollBarTo(this.calcScrollBarPos(to));
}
};
this.slideTo = function(/*Object*/to, /*Number*/duration, /*String*/easing){
this._runSlideAnimation(this.getPos(), to, duration, easing, this.containerNode, 2);
this.slideScrollBarTo(to, duration, easing);
};
this.makeTranslateStr = function(to){
var y = this._v && typeof to.y == "number" ? to.y+"px" : "0px";
var x = (this._h||this._f) && typeof to.x == "number" ? to.x+"px" : "0px";
return dojoMobile.hasTranslate3d ?
"translate3d("+x+","+y+",0px)" : "translate("+x+","+y+")";
};
this.getPos = function(){
// summary:
// Get the top position in the midst of animation
if(dojo.isWebKit){
var m = document.defaultView.getComputedStyle(this.containerNode, '')["-webkit-transform"];
if(m && m.indexOf("matrix") === 0){
var arr = m.split(/[,\s\)]+/);
return {y:arr[5] - 0, x:arr[4] - 0};
}
return {x:0, y:0};
}else{
return {y:this.containerNode.offsetTop, x:this.containerNode.offsetLeft};
}
};
this.getDim = function(){
var d = {};
// content width/height
d.c = {h:this.containerNode.offsetHeight - this.fixedHeaderHeight, w:this.containerNode.offsetWidth};
// view width/height
d.v = {h:this.domNode.offsetHeight + this._appFooterHeight, w:this.domNode.offsetWidth};
// display width/height
d.d = {h:d.v.h - this.fixedHeaderHeight - this.fixedFooterHeight, w:d.v.w};
// overflowed width/height
d.o = {h:d.c.h - d.v.h + this.fixedHeaderHeight + this.fixedFooterHeight, w:d.c.w - d.v.w};
return d;
};
this.showScrollBar = function(){
if(!this.scrollBar){ return; }
var dim = this._dim;
if(this.scrollDir == "v" && dim.c.h <= dim.d.h){ return; }
if(this.scrollDir == "h" && dim.c.w <= dim.d.w){ return; }
if(this._v && this._h && dim.c.h <= dim.d.h && dim.c.w <= dim.d.w){ return; }
var createBar = function(self, dir){
var bar = self["_scrollBarNode" + dir];
if(!bar){
var wrapper = dojo.create("div", null, self.domNode);
var props = { position: "absolute", overflow: "hidden" };
if(dir == "V"){
props.right = "2px";
props.width = "5px";
}else{
props.bottom = (self.isLocalFooter ? self.fixedFooterHeight : 0) + 2 + "px";
props.height = "5px";
}
dojo.style(wrapper, props);
wrapper.className = "mblScrollBarWrapper";
self["_scrollBarWrapper"+dir] = wrapper;
bar = dojo.create("div", null, wrapper);
dojo.style(bar, {
opacity: 0.6,
position: "absolute",
backgroundColor: "#606060",
fontSize: "1px",
webkitBorderRadius: "2px",
MozBorderRadius: "2px",
webkitTransformOrigin: "0 0",
zIndex: 2147483647 // max of signed 32-bit integer
});
dojo.style(bar, dir == "V" ? {width: "5px"} : {height: "5px"});
self["_scrollBarNode" + dir] = bar;
}
return bar;
};
if(this._v && !this._scrollBarV){
this._scrollBarV = createBar(this, "V");
}
if(this._h && !this._scrollBarH){
this._scrollBarH = createBar(this, "H");
}
this.resetScrollBar();
};
this.hideScrollBar = function(){
var fadeRule;
if(this.fadeScrollBar && dojo.isWebKit){
if(!dojoMobile._fadeRule){
var node = dojo.create("style", null, document.getElementsByTagName("head")[0]);
node.textContent =
".mblScrollableFadeOutScrollBar{"+
" -webkit-animation-duration: 1s;"+
" -webkit-animation-name: scrollableViewFadeOutScrollBar;}"+
"@-webkit-keyframes scrollableViewFadeOutScrollBar{"+
" from { opacity: 0.6; }"+
" 50% { opacity: 0.6; }"+
" to { opacity: 0; }}";
dojoMobile._fadeRule = node.sheet.cssRules[1];
}
fadeRule = dojoMobile._fadeRule;
}
if(!this.scrollBar){ return; }
var f = function(bar){
dojo.style(bar, {
opacity: 0,
webkitAnimationDuration: ""
});
bar.className = "mblScrollableFadeOutScrollBar";
};
if(this._scrollBarV){
f(this._scrollBarV);
this._scrollBarV = null;
}
if(this._scrollBarH){
f(this._scrollBarH);
this._scrollBarH = null;
}
};
this.calcScrollBarPos = function(/*Object*/to){ // to: {x, y}
var pos = {};
var dim = this._dim;
var f = function(wrapperH, barH, t, d, c){
var y = Math.round((d - barH - 8) / (d - c) * t);
if(y < -barH + 5){
y = -barH + 5;
}
if(y > wrapperH - 5){
y = wrapperH - 5;
}
return y;
};
if(typeof to.y == "number" && this._scrollBarV){
pos.y = f(this._scrollBarWrapperV.offsetHeight, this._scrollBarV.offsetHeight, to.y, dim.d.h, dim.c.h);
}
if(typeof to.x == "number" && this._scrollBarH){
pos.x = f(this._scrollBarWrapperH.offsetWidth, this._scrollBarH.offsetWidth, to.x, dim.d.w, dim.c.w);
}
return pos;
};
this.scrollScrollBarTo = function(/*Object*/to){ // to: {x, y}
if(!this.scrollBar){ return; }
if(this._v && this._scrollBarV && typeof to.y == "number"){
if(dojo.isWebKit){
this._scrollBarV.style.webkitTransform = this.makeTranslateStr({y:to.y});
}else{
this._scrollBarV.style.top = to.y + "px";
}
}
if(this._h && this._scrollBarH && typeof to.x == "number"){
if(dojo.isWebKit){
this._scrollBarH.style.webkitTransform = this.makeTranslateStr({x:to.x});
}else{
this._scrollBarH.style.left = to.x + "px";
}
}
};
this.slideScrollBarTo = function(/*Object*/to, /*Number*/duration, /*String*/easing){
if(!this.scrollBar){ return; }
var fromPos = this.calcScrollBarPos(this.getPos());
var toPos = this.calcScrollBarPos(to);
if(this._v && this._scrollBarV){
this._runSlideAnimation({y:fromPos.y}, {y:toPos.y}, duration, easing, this._scrollBarV, 0);
}
if(this._h && this._scrollBarH){
this._runSlideAnimation({x:fromPos.x}, {x:toPos.x}, duration, easing, this._scrollBarH, 1);
}
};
this._runSlideAnimation = function(/*Object*/from, /*Object*/to, /*Number*/duration, /*String*/easing, node, idx){
// idx: 0:scrollbarV, 1:scrollbarH, 2:content
if(dojo.isWebKit){
this.setKeyframes(from, to, idx);
dojo.style(node, {
webkitAnimationDuration: duration + "s",
webkitAnimationTimingFunction: easing
});
dojo.addClass(node, "mblScrollableScrollTo"+idx);
if(idx == 2){
this.scrollTo(to, true);
}else{
this.scrollScrollBarTo(to);
}
//>>excludeStart("webkitMobile", kwArgs.webkitMobile);
}else if(dojo.fx && dojo.fx.easing){
// If you want to support non-webkit browsers,
// your application needs to load necessary modules as follows:
//
// | dojo.require("dojo.fx");
// | dojo.require("dojo.fx.easing");
//
// This module itself does not make dependency on them.
var s = dojo.fx.slideTo({
node: node,
duration: duration*1000,
left: to.x,
top: to.y,
easing: (easing == "ease-out") ? dojo.fx.easing.quadOut : dojo.fx.easing.linear
}).play();
if(idx == 2){
dojo.connect(s, "onEnd", this, "onFlickAnimationEnd");
}
}else{
// directly jump to the destination without animation
if(idx == 2){
this.scrollTo(to);
this.onFlickAnimationEnd();
}else{
this.scrollScrollBarTo(to);
}
//>>excludeEnd("webkitMobile");
}
};
this.resetScrollBar = function(){
// summary:
// Resets the scroll bar length, position, etc.
var f = function(wrapper, bar, d, c, hd, v){
if(!bar){ return; }
var props = {};
props[v ? "top" : "left"] = hd + 4 + "px"; // +4 is for top or left margin
props[v ? "height" : "width"] = d - 8 + "px";
dojo.style(wrapper, props);
var l = Math.round(d * d / c); // scroll bar length
l = Math.min(Math.max(l - 8, 5), d - 8); // -8 is for margin for both ends
bar.style[v ? "height" : "width"] = l + "px";
dojo.style(bar, {"opacity": 0.6});
};
var dim = this.getDim();
f(this._scrollBarWrapperV, this._scrollBarV, dim.d.h, dim.c.h, this.fixedHeaderHeight, true);
f(this._scrollBarWrapperH, this._scrollBarH, dim.d.w, dim.c.w, 0);
this.createMask();
};
this.createMask = function(){
// summary:
// Creates a mask for a scroll bar edge.
// description:
// This function creates a mask that hides corners of one scroll
// bar edge to make it round edge. The other side of the edge is
// always visible and round shaped with the border-radius style.
if(!dojo.isWebKit){ return; }
var ctx;
if(this._scrollBarWrapperV){
var h = this._scrollBarWrapperV.offsetHeight;
ctx = document.getCSSCanvasContext("2d", "scrollBarMaskV", 5, h);
ctx.fillStyle = "rgba(0,0,0,0.5)";
ctx.fillRect(1, 0, 3, 2);
ctx.fillRect(0, 1, 5, 1);
ctx.fillRect(0, h - 2, 5, 1);
ctx.fillRect(1, h - 1, 3, 2);
ctx.fillStyle = "rgb(0,0,0)";
ctx.fillRect(0, 2, 5, h - 4);
this._scrollBarWrapperV.style.webkitMaskImage = "-webkit-canvas(scrollBarMaskV)";
}
if(this._scrollBarWrapperH){
var w = this._scrollBarWrapperH.offsetWidth;
ctx = document.getCSSCanvasContext("2d", "scrollBarMaskH", w, 5);
ctx.fillStyle = "rgba(0,0,0,0.5)";
ctx.fillRect(0, 1, 2, 3);
ctx.fillRect(1, 0, 1, 5);
ctx.fillRect(w - 2, 0, 1, 5);
ctx.fillRect(w - 1, 1, 2, 3);
ctx.fillStyle = "rgb(0,0,0)";
ctx.fillRect(2, 0, w - 4, 5);
this._scrollBarWrapperH.style.webkitMaskImage = "-webkit-canvas(scrollBarMaskH)";
}
};
this.flashScrollBar = function(){
if(this.disableFlashScrollBar){ return; }
this._dim = this.getDim();
if(this._dim.d.h <= 0){ return; } // dom is not ready
this.showScrollBar();
var _this = this;
setTimeout(function(){
_this.hideScrollBar();
}, 300);
};
this.addCover = function(){
//>>excludeStart("webkitMobile", kwArgs.webkitMobile);
if(!dojoMobile.hasTouch && !this.noCover){
if(!this._cover){
this._cover = dojo.create("div", null, document.body);
dojo.style(this._cover, {
backgroundColor: "#ffff00",
opacity: 0,
position: "absolute",
top: "0px",
left: "0px",
width: "100%",
height: "100%",
zIndex: 2147483647 // max of signed 32-bit integer
});
this._ch.push(dojo.connect(this._cover,
dojoMobile.hasTouch ? "touchstart" : "onmousedown", this, "onTouchEnd"));
}else{
this._cover.style.display = "";
}
}
//>>excludeEnd("webkitMobile");
this.setSelectable(this.domNode, false);
var sel;
if(window.getSelection){
sel = window.getSelection();
sel.collapse(document.body, 0);
}else{
sel = document.selection.createRange();
sel.setEndPoint("EndToStart", sel);
sel.select();
}
};
this.removeCover = function(){
//>>excludeStart("webkitMobile", kwArgs.webkitMobile);
if(!dojoMobile.hasTouch && this._cover){
this._cover.style.display = "none";
}
//>>excludeEnd("webkitMobile");
this.setSelectable(this.domNode, true);
};
this.setKeyframes = function(/*Object*/from, /*Object*/to, /*Number*/idx){
if(!dojoMobile._rule){
dojoMobile._rule = [];
}
// idx: 0:scrollbarV, 1:scrollbarH, 2:content
if(!dojoMobile._rule[idx]){
var node = dojo.create("style", null, document.getElementsByTagName("head")[0]);
node.textContent =
".mblScrollableScrollTo"+idx+"{-webkit-animation-name: scrollableViewScroll"+idx+";}"+
"@-webkit-keyframes scrollableViewScroll"+idx+"{}";
dojoMobile._rule[idx] = node.sheet.cssRules[1];
}
var rule = dojoMobile._rule[idx];
if(rule){
if(from){
rule.deleteRule("from");
rule.insertRule("from { -webkit-transform: "+this.makeTranslateStr(from)+"; }");
}
if(to){
if(to.x === undefined){ to.x = from.x; }
if(to.y === undefined){ to.y = from.y; }
rule.deleteRule("to");
rule.insertRule("to { -webkit-transform: "+this.makeTranslateStr(to)+"; }");
}
}
};
this.setSelectable = function(node, selectable){
// dojo.setSelectable has dependency on dojo.query. Re-define our own.
node.style.KhtmlUserSelect = selectable ? "auto" : "none";
node.style.MozUserSelect = selectable ? "" : "none";
node.onselectstart = selectable ? null : function(){return false;};
node.unselectable = selectable ? "" : "on";
};
};
});