fixed doublescroll
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Naiel
@@ -1,83 +1,140 @@
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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, jQueryUI
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* @requires jQuery
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*
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* @author Pawel Suwala - http://suwala.eu/
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* @version 0.3 (12-03-2014)
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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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$.widget("suwala.doubleScroll", {
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options: {
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jQuery.fn.doubleScroll = function(userOptions) {
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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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topScrollBarMarkup: '<div class="suwala-doubleScroll-scroll-wrapper" style="height: 20px;"><div class="suwala-doubleScroll-scroll" style="height: 20px;"></div></div>',
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topScrollBarInnerSelector: '.suwala-doubleScroll-scroll',
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scrollCss: {
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'overflow-x': 'scroll',
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'overflow-y':'hidden'
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'overflow-x': 'auto',
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'overflow-y': 'hidden',
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'height': '20px'
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},
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contentCss: {
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'overflow-x': 'scroll',
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'overflow-x': 'auto',
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'overflow-y': 'hidden'
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}
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},
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_create : function() {
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var self = this;
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var contentElement;
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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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// add div that will act as an upper scroll
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var topScrollBar = $($(self.options.topScrollBarMarkup));
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self.element.before(topScrollBar);
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$.extend(true, options, userOptions);
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// find the content element (should be the widest one)
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if (self.options.contentElement !== undefined && self.element.find(self.options.contentElement).length !== 0) {
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contentElement = self.element.find(self.options.contentElement);
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}
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else {
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contentElement = self.element.find('>:first-child');
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// do not modify
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// internal stuff
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$.extend(options, {
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topScrollBarMarkup: '<div class="doubleScroll-scroll-wrapper"><div class="doubleScroll-scroll"></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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var _showScrollBar = function($self, options) {
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if (options.onlyIfScroll && $self.get(0).scrollWidth <= Math.round($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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// add div that will act as an upper scroll only if not already added to the DOM
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var $topScrollBar = $self.prev(options.topScrollBarWrapperSelector);
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if ($topScrollBar.length == 0) {
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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($topScrollBar);
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// apply the css
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$topScrollBar.css(options.scrollCss);
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$(options.topScrollBarInnerSelector).css("height", "20px");
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$self.css(options.contentCss);
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var scrolling = false;
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// bind upper scroll to bottom scroll
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topScrollBar.scroll(function(){
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self.element.scrollLeft(topScrollBar.scrollLeft());
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$topScrollBar.bind('scroll.doubleScroll', function() {
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if (scrolling) {
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scrolling = false;
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return;
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}
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scrolling = true;
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$self.scrollLeft($topScrollBar.scrollLeft());
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});
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// bind bottom scroll to upper scroll
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self.element.scroll(function(){
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topScrollBar.scrollLeft(self.element.scrollLeft());
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});
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// apply css
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topScrollBar.css(self.options.scrollCss);
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self.element.css(self.options.contentCss);
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// set the width of the wrappers
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$(self.options.topScrollBarInnerSelector, topScrollBar).width(contentElement[0].scrollWidth);
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topScrollBar.width(self.element[0].clientWidth);
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},
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refresh: function(){
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// this should be called if the content of the inner element changed.
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// i.e. After AJAX data load
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var self = this;
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var contentElement;
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var topScrollBar = self.element.parent().find('.suwala-doubleScroll-scroll-wrapper');
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var selfScrollHandler = function() {
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if (scrolling) {
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scrolling = false;
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return;
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}
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scrolling = true;
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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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// find the content element (should be the widest one)
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if (self.options.contentElement !== undefined && self.element.find(self.options.contentElement).length !== 0) {
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contentElement = self.element.find(self.options.contentElement);
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}
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else {
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contentElement = self.element.find('>:first-child');
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var $contentElement;
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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 = $self.find('>:first-child');
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}
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// set the width of the wrappers
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$(self.options.topScrollBarInnerSelector, topScrollBar).width(contentElement[0].scrollWidth);
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topScrollBar.width(self.element[0].clientWidth);
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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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return this.each(function() {
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var $self = $(this);
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_showScrollBar($self, options);
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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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var id;
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var handler = function(e) {
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_showScrollBar($self, options);
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};
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$(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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})(jQuery);
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}
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});
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}
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}( jQuery ));
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