webapp/static/swiper/src/js/scrollbar.js

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/*=========================
  Scrollbar
  ===========================*/
s.scrollbar = {
    isTouched: false,
    setDragPosition: function (e) {
        var sb = s.scrollbar;
        var x = 0, y = 0;
        var translate;
        var pointerPosition = s.isHorizontal() ?
            ((e.type === 'touchstart' || e.type === 'touchmove') ? e.targetTouches[0].pageX : e.pageX || e.clientX) :
            ((e.type === 'touchstart' || e.type === 'touchmove') ? e.targetTouches[0].pageY : e.pageY || e.clientY) ;
        var position = (pointerPosition) - sb.track.offset()[s.isHorizontal() ? 'left' : 'top'] - sb.dragSize / 2;
        var positionMin = -s.minTranslate() * sb.moveDivider;
        var positionMax = -s.maxTranslate() * sb.moveDivider;
        if (position < positionMin) {
            position = positionMin;
        }
        else if (position > positionMax) {
            position = positionMax;
        }
        position = -position / sb.moveDivider;
        s.updateProgress(position);
        s.setWrapperTranslate(position, true);
    },
    dragStart: function (e) {
        var sb = s.scrollbar;
        sb.isTouched = true;
        e.preventDefault();
        e.stopPropagation();

        sb.setDragPosition(e);
        clearTimeout(sb.dragTimeout);

        sb.track.transition(0);
        if (s.params.scrollbarHide) {
            sb.track.css('opacity', 1);
        }
        s.wrapper.transition(100);
        sb.drag.transition(100);
        s.emit('onScrollbarDragStart', s);
    },
    dragMove: function (e) {
        var sb = s.scrollbar;
        if (!sb.isTouched) return;
        if (e.preventDefault) e.preventDefault();
        else e.returnValue = false;
        sb.setDragPosition(e);
        s.wrapper.transition(0);
        sb.track.transition(0);
        sb.drag.transition(0);
        s.emit('onScrollbarDragMove', s);
    },
    dragEnd: function (e) {
        var sb = s.scrollbar;
        if (!sb.isTouched) return;
        sb.isTouched = false;
        if (s.params.scrollbarHide) {
            clearTimeout(sb.dragTimeout);
            sb.dragTimeout = setTimeout(function () {