292 lines
8.9 KiB
JavaScript
292 lines
8.9 KiB
JavaScript
// Author: David Qin
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// E-mail: david@hereapp.cn
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// Date: 2014-11-05
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(function ($) {
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// a case insensitive jQuery :contains selector
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$.expr[":"].searchableSelectContains = $.expr.createPseudo(function (arg) {
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return function (elem) {
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if (arg) return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
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else $(".searchable-select-items>div").removeClass("searchable-select-hide");
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};
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});
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$.searchableSelect = function (element, options) {
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this.element = element;
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this.options = options || {};
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this.init();
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var _this = this;
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this.searchableElement.click(function (event) {
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// event.stopPropagation();
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_this.show();
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}).on('keydown', function (event) {
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if (event.which === 13 || event.which === 40 || event.which == 38) {
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event.preventDefault();
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_this.show();
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}
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});
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$(document).on('click', null, function (event) {
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if (_this.searchableElement.has($(event.target)).length === 0)
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_this.hide();
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});
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this.input.on('keydown', function (event) {
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event.stopPropagation();
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if (event.which === 13) { //enter
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event.preventDefault();
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_this.selectCurrentHoverItem();
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//回车回调
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if (_this.options.enterCallback) _this.options.enterCallback(_this.input);
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_this.hide();
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} else if (event.which == 27) { //ese
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_this.hide();
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} else if (event.which == 40) { //down
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_this.hoverNextItem();
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} else if (event.which == 38) { //up
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_this.hoverPreviousItem();
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}
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}).on('keyup', function (event) {
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if (event.which != 13 && event.which != 27 && event.which != 38 && event.which != 40)
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_this.filter();
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//监听搜索输入框回调
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if (_this.options.inputKeyUpCallback) _this.options.inputKeyUpCallback($(this));
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})
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}
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var $sS = $.searchableSelect;
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$sS.fn = $sS.prototype = {
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version: '0.0.1'
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};
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$sS.fn.extend = $sS.extend = $.extend;
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$sS.fn.extend({
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init: function () {
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var _this = this;
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this.element.hide();
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this.searchableElement = $('<div tabindex="0" class="searchable-select"></div>');
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// this.holder = $('<div class="searchable-select-holder"></div>');//旧的
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this.holder = $('<input type="text" readonly class="searchable-select-holder" placeholder="' + (_this.options.placeholder ? _this.options.placeholder : "") + '" />');
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this.dropdown = $('<div class="searchable-select-dropdown searchable-select-hide"></div>');
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this.input = $('<input type="text" class="searchable-select-input" />');
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this.items = $('<div class="searchable-select-items"></div>');
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this.caret = $('<i class="layui-edge searchable-select-caret"></i>');
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this.scrollPart = $('<div class="searchable-scroll"></div>');
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this.hasPrivious = $('<div class="searchable-has-privious">...</div>');
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this.hasNext = $('<div class="searchable-has-next">...</div>');
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this.hasNext.on('mouseenter', function () {
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_this.hasNextTimer = null;
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var f = function () {
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var scrollTop = _this.items.scrollTop();
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_this.items.scrollTop(scrollTop + 20);
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_this.hasNextTimer = setTimeout(f, 50);
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}
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f();
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}).on('mouseleave', function (event) {
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clearTimeout(_this.hasNextTimer);
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});
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this.hasPrivious.on('mouseenter', function () {
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_this.hasPriviousTimer = null;
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var f = function () {
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var scrollTop = _this.items.scrollTop();
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_this.items.scrollTop(scrollTop - 20);
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_this.hasPriviousTimer = setTimeout(f, 50);
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}
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f();
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}).on('mouseleave', function (event) {
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clearTimeout(_this.hasPriviousTimer);
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});
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this.dropdown.append(this.input);
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this.dropdown.append(this.scrollPart);
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this.scrollPart.append(this.hasPrivious);
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this.scrollPart.append(this.items);
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this.scrollPart.append(this.hasNext);
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this.searchableElement.append(this.caret);
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this.searchableElement.append(this.holder);
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this.searchableElement.append(this.dropdown);
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this.element.after(this.searchableElement);
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this.buildItems();
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this.setPriviousAndNextVisibility();
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},
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filter: function () {
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var text = this.input.val();
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this.items.find('.searchable-select-item').addClass('searchable-select-hide');
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this.items.find('.searchable-select-item:searchableSelectContains(' + text + ')').removeClass('searchable-select-hide');
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if (this.currentSelectedItem && this.currentSelectedItem.hasClass('searchable-select-hide') && this.items.find('.searchable-select-item:not(.searchable-select-hide)').length > 0) {
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this.hoverFirstNotHideItem();
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}
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this.setPriviousAndNextVisibility();
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},
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hoverFirstNotHideItem: function () {
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this.hoverItem(this.items.find('.searchable-select-item:not(.searchable-select-hide)').first());
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},
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selectCurrentHoverItem: function () {
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if (this.currentHoverItem && !this.currentHoverItem.hasClass('searchable-select-hide'))
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this.selectItem(this.currentHoverItem);
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},
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hoverPreviousItem: function () {
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if (!this.hasCurrentHoverItem())
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this.hoverFirstNotHideItem();
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else {
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var prevItem = this.currentHoverItem.prevAll('.searchable-select-item:not(.searchable-select-hide):first')
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if (prevItem.length > 0)
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this.hoverItem(prevItem);
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}
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},
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hoverNextItem: function () {
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if (!this.hasCurrentHoverItem())
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this.hoverFirstNotHideItem();
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else {
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var nextItem = this.currentHoverItem.nextAll('.searchable-select-item:not(.searchable-select-hide):first')
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if (nextItem.length > 0)
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this.hoverItem(nextItem);
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}
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},
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buildItems: function () {
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var _this = this;
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this.element.find('option').each(function () {
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if ($(this).text().length == 0) return;
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var item = $('<div class="searchable-select-item" data-value="' + $(this).attr('value') + '">' + $(this).text() + '</div>');
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if (this.selected) {
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_this.selectItem(item);
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_this.hoverItem(item);
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}
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item.on('mouseenter', function () {
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$(this).addClass('hover');
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}).on('mouseleave', function () {
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$(this).removeClass('hover');
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}).click(function (event) {
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event.stopPropagation();
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_this.selectItem($(this));
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_this.hide();
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//选择option后执行回调
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if (_this.options.optionCallback) {
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var value = $(this).attr("data-value");
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var text = $(this).text();
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_this.options.optionCallback(value, text);
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}
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});
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_this.items.append(item);
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});
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this.items.on('scroll', function () {
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_this.setPriviousAndNextVisibility();
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})
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},
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show: function () {
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this.dropdown.removeClass('searchable-select-hide');
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this.input.focus();
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this.status = 'show';
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this.caret.addClass("selected");//下三角
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this.setPriviousAndNextVisibility();
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},
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hide: function () {
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if (!(this.status === 'show'))
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return;
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if (this.items.find(':not(.searchable-select-hide)').length === 0)
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this.input.val('');
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this.dropdown.addClass('searchable-select-hide');
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this.searchableElement.trigger('focus');
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this.status = 'hide';
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this.caret.removeClass("selected");//下三角
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},
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hasCurrentSelectedItem: function () {
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return this.currentSelectedItem && this.currentSelectedItem.length > 0;
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},
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selectItem: function (item) {
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if (this.hasCurrentSelectedItem())
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this.currentSelectedItem.removeClass('selected');
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this.currentSelectedItem = item;
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item.addClass('selected');
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this.hoverItem(item);
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this.holder.val(item.text());
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var value = item.data('value');
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this.holder.data('value', value);
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this.element.val(value);
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if (this.options.afterSelectItem) {
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this.options.afterSelectItem.apply(this);
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}
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},
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hasCurrentHoverItem: function () {
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return this.currentHoverItem && this.currentHoverItem.length > 0;
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},
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hoverItem: function (item) {
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if (this.hasCurrentHoverItem())
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this.currentHoverItem.removeClass('hover');
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if (item.outerHeight() + item.position().top > this.items.height())
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this.items.scrollTop(this.items.scrollTop() + item.outerHeight() + item.position().top - this.items.height());
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else if (item.position().top < 0)
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this.items.scrollTop(this.items.scrollTop() + item.position().top);
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this.currentHoverItem = item;
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item.addClass('hover');
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},
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setPriviousAndNextVisibility: function () {
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if (this.items.scrollTop() === 0) {
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this.hasPrivious.addClass('searchable-select-hide');
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this.scrollPart.removeClass('has-privious');
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} else {
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this.hasPrivious.removeClass('searchable-select-hide');
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this.scrollPart.addClass('has-privious');
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}
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if (this.items.scrollTop() + this.items.innerHeight() >= this.items[0].scrollHeight) {
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this.hasNext.addClass('searchable-select-hide');
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this.scrollPart.removeClass('has-next');
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} else {
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this.hasNext.removeClass('searchable-select-hide');
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this.scrollPart.addClass('has-next');
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}
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}
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});
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$.fn.searchableSelect = function (options) {
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var sS;
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this.each(function () {
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sS = new $sS($(this), options);
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});
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return sS;//返回当前对象，那边接收到后可以进行后期的修改对象操作
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//return this;//以前的
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};
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})(jQuery); |