scroll: function (scrollType, isScrollRight, event, triggerType) {
if (Arrays.indexOf(scrollType, this._scrollTypes) < 0)
throw "IllegalArgumentException: scrollType must be one of \""
+ this._scrollTypes.join(", ") + "\".";
if (typeof isScrollRight !== 'boolean')
throw "IllegalArgumentException: isScrollRight must be a Boolean.";
if (typeof event === 'undefined')
throw "IllegalArgumentException: event must be provided.";
if (Arrays.indexOf(triggerType, this._triggerTypes) < 0)
throw "IllegalArgumentException: triggerType must be one of \""
+ this._triggerTypes.join(", ") + "\".";
if (triggerType !== 'mouse') {
// Mouse is holding by the user,
// prevent other events from being triggered.
if (this._triggerType === 'mouse')
return;
else
this._triggerType = triggerType;
}
var move,
negSymbol = ( (isScrollRight === true)
? 1
: -1 );
if (scrollType === 'page')
move = Math.ceil(this._width * 0.8) * negSymbol;
else if (scrollType === 'arrow')
move = this._increment * negSymbol;
// When the user is scrolling by page or arrow,
// we make a change immediately,
// and then wait 750ms to see whether we continue
// the scrolling or not.
this.position(this.position() + move);
this._change();
if ( scrollType === 'page'
|| scrollType === 'arrow' ) {
this._isPaused = false;
var fn = function () {
this._isScrolling = true;
this._scroll(move);
};
fn = Fns.inContext(this, fn);
this._timerChangeBegins = setTimeout(fn, 750);
}
},
_scroll: function (move) {
var freq = 50,
barPos;
var fn = function () {
if (this._isPaused === false) {
if (!this._isScrolling) {
clearInterval(this._timerScrolling);
return;
}
// Clicks on dead-space.
if (this._isPageRight !== null) {
barPos = this._bar.offset();
/*
* The scrollbar will keep on scrolling only when
* the mouse is still at the same side.
*/
if ( ( this._pageXMoveStart < barPos.left
&& !this._isPageRight )
|| ( this._pageXMoveStart > barPos.left + this._barLen
&& this._isPageRight ) ) {
this.position(this.position() + move);
this._change();
}
}
else {
this.position(this.position() + move);
this._change();
}
}
};
fn = Fns.inContext(this, fn);
this._timerScrolling = setInterval(fn, freq);
},