page 插件 博客分类: javascript
程序员文章站
2024-03-22 20:35:04
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(function($) { $.fn.pager = function(options) { var opts = $.extend({}, $.fn.pager.defaults, options); return this.each(function() { // empty out the destination element and then render out the pager with the supplied options $(this).empty().append(renderpager(parseInt(options.pagenumber), parseInt(options.pagecount), options.buttonClickCallback)); }); }; // render and return the pager with the supplied options function renderpager(pagenumber, pagecount, buttonClickCallback) { // setup $pager to hold render var $pager = $('<ul class="pages"></ul>'); // add in the previous and next buttons $pager.append(renderButton('首页', pagenumber, pagecount, buttonClickCallback)).append(renderButton('上一页', pagenumber, pagecount, buttonClickCallback)); // pager currently only handles 10 viewable pages ( could be easily parameterized, maybe in next version ) so handle edge cases var startPoint = 1; var endPoint = 9; if (pagenumber > 4) { startPoint = pagenumber - 4; endPoint = pagenumber + 4; } if (endPoint > pagecount) { startPoint = pagecount - 8; endPoint = pagecount; } if (startPoint < 1) { startPoint = 1; } // loop thru visible pages and render buttons for (var page = startPoint; page <= endPoint; page++) { var currentButton = $('<li class="page-number">' + (page) + '</li>'); page == pagenumber ? currentButton.addClass('pgCurrent') : currentButton.click(function() { buttonClickCallback(this.firstChild.data); }); currentButton.appendTo($pager); } // render in the next and last buttons before returning the whole rendered control back. $pager.append(renderButton('下一页', pagenumber, pagecount, buttonClickCallback)).append(renderButton('末页', pagenumber, pagecount, buttonClickCallback)); return $pager; } // renders and returns a 'specialized' button, ie 'next', 'previous' etc. rather than a page number button function renderButton(buttonLabel, pagenumber, pagecount, buttonClickCallback) { var $Button = $('<li class="pgNext">' + buttonLabel + '</li>'); var destPage = 1; // work out destination page for required button type switch (buttonLabel) { case "首页": destPage = 1; break; case "上一页": destPage = pagenumber - 1; break; case "下一页": destPage = pagenumber + 1; break; case "末页": destPage = pagecount; break; } // disable and 'grey' out buttons if not needed. if (buttonLabel == "首页" || buttonLabel == "上一页") { pagenumber <= 1 ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage); }); } else { pagenumber >= pagecount ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage); }); } return $Button; } // pager defaults. hardly worth bothering with in this case but used as placeholder for expansion in the next version $.fn.pager.defaults = { pagenumber: 1, pagecount: 1 }; })(jQuery);
var $pager = $("#pager");
$pager.pager({
pagenumber: ${pager.pageNumber},
pagecount: ${pager.pageCount},
buttonClickCallback: $.gotoPage
});
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