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@@ -0,0 +1,126 @@
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+/*
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+ * @name DoubleScroll
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+ * @desc displays scroll bar on top and on the bottom of the div
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+ * @requires jQuery
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+ *
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+ * @author Pawel Suwala - http://suwala.eu/
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+ * @author Antoine Vianey - http://www.astek.fr/
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+ * @version 0.5 (11-11-2015)
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+ *
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+ * Dual licensed under the MIT and GPL licenses:
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+ * http://www.opensource.org/licenses/mit-license.php
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+ * http://www.gnu.org/licenses/gpl.html
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+ *
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+ * Usage:
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+ * https://github.com/avianey/jqDoubleScroll
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+ */
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+ (function( $ ) {
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+
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+ jQuery.fn.doubleScroll = function(userOptions) {
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+
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+ // Default options
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+ var options = {
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+ contentElement: undefined, // Widest element, if not specified first child element will be used
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+ scrollCss: {
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+ 'overflow-x': 'auto',
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+ 'overflow-y': 'hidden'
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+ },
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+ contentCss: {
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+ 'overflow-x': 'auto',
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+ 'overflow-y': 'hidden'
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+ },
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+ onlyIfScroll: true, // top scrollbar is not shown if the bottom one is not present
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+ resetOnWindowResize: false, // recompute the top ScrollBar requirements when the window is resized
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+ timeToWaitForResize: 30 // wait for the last update event (usefull when browser fire resize event constantly during ressing)
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+ };
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+
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+ $.extend(true, options, userOptions);
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+
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+ // do not modify
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+ // internal stuff
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+ $.extend(options, {
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+ topScrollBarMarkup: '<div class="doubleScroll-scroll-wrapper" style="height: 20px;"><div class="doubleScroll-scroll" style="height: 20px;"></div></div>',
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+ topScrollBarWrapperSelector: '.doubleScroll-scroll-wrapper',
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+ topScrollBarInnerSelector: '.doubleScroll-scroll'
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+ });
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+
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+ var _showScrollBar = function($self, options) {
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+
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+ if (options.onlyIfScroll && $self.get(0).scrollWidth <= $self.width()) {
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+ // content doesn't scroll
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+ // remove any existing occurrence...
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+ $self.prev(options.topScrollBarWrapperSelector).remove();
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+ return;
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+ }
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+
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+ // add div that will act as an upper scroll only if not already added to the DOM
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+ var $topScrollBar = $self.prev(options.topScrollBarWrapperSelector);
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+
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+ if ($topScrollBar.length == 0) {
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+
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+ // creating the scrollbar
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+ // added before in the DOM
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+ $topScrollBar = $(options.topScrollBarMarkup);
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+ $self.before($topScrollBar);
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+
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+ // apply the css
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+ $topScrollBar.css(options.scrollCss);
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+ $self.css(options.contentCss);
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+
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+ // bind upper scroll to bottom scroll
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+ $topScrollBar.bind('scroll.doubleScroll', function() {
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+ $self.scrollLeft($topScrollBar.scrollLeft());
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+ });
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+
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+ // bind bottom scroll to upper scroll
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+ var selfScrollHandler = function() {
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+ $topScrollBar.scrollLeft($self.scrollLeft());
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+ };
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+ $self.bind('scroll.doubleScroll', selfScrollHandler);
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+ }
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+
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+ // find the content element (should be the widest one)
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+ var $contentElement;
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+
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+ if (options.contentElement !== undefined && $self.find(options.contentElement).length !== 0) {
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+ $contentElement = $self.find(options.contentElement);
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+ } else {
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+ $contentElement = $self.find('>:first-child');
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+ }
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+
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+ // set the width of the wrappers
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+ $(options.topScrollBarInnerSelector, $topScrollBar).width($contentElement.outerWidth());
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+ $topScrollBar.width($self.width());
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+ $topScrollBar.scrollLeft($self.scrollLeft());
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+
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+ }
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+
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+ return this.each(function() {
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+
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+ var $self = $(this);
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+
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+ _showScrollBar($self, options);
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+
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+ // bind the resize handler
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+ // do it once
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+ if (options.resetOnWindowResize) {
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+
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+ var id;
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+ var handler = function(e) {
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+ _showScrollBar($self, options);
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+ };
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+
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+ $(window).bind('resize.doubleScroll', function() {
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+ // adding/removing/replacing the scrollbar might resize the window
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+ // so the resizing flag will avoid the infinite loop here...
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+ clearTimeout(id);
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+ id = setTimeout(handler, options.timeToWaitForResize);
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+ });
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+
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+ }
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+
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+ });
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+
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+ }
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+
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+}( jQuery ));
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