【发布时间】：2011-03-13 07:36:42
【问题描述】：
我需要默认提供多项选择，因此用户不必按住 ctrl。希望能得到一些帮助，谢谢。
【问题讨论】：
标签： jquery jquery-ui selectable
【发布时间】：2011-03-13 07:36:42
【问题描述】：
$("#selectable").selectable();
$("#selectable").on("selectablestart", function (event, ui) {
event.originalEvent.ctrlKey = true;
});
【讨论】：
-
请提供详细信息
-
api.jqueryui.com/selectable/#event-start 此事件在任何选择之前触发，所以我只需修改原始事件对象，使其看起来像是从开始按下 CTRL 键:)
-
谢谢，我已经确认这很好用；无需破解 jQueryUI 代码，或使用替代方法。 （我同时使用 jQuery 和 jQueryUI 的 1.10.x，但 IIUC 这将比这更早兼容。）
如果你想使用 selectable ，你可能想使用绑定元键和 mousedown 事件。已经有一场辩论正在进行 here ，我只是在谷歌搜索时发现的。
【讨论】：
我曾经需要类似的东西。
这是一个很好的例子，说明如何做到这一点。我想它可能会给你一些想法。
http://www.joelanman.com/static/examples/multiple_selection/
这里也是教程链接
http://www.joelanman.com/2009/03/simple-multiple-selection-with-checkbox-lists-and-jquery/
【讨论】：
-
我想这意味着构建你自己的东西，我希望使用jqueryui.com/demos/selectable，以便我可以利用该功能。我只需要将 CTRL 行为设为默认行为。
好吧，如果你想修改可选择的代码，在顶部的选项对象中添加一个选项（我的叫multi_no_key，默认为false）。
然后，查找 var doSelect 声明的位置，它最初看起来像这样
var doSelect = !event.metaKey || !selectee.$element.hasClass('ui-selected');
然后改成这个
var doSelect;
if(!options.multi_no_key)
doSelect = !event.metaKey || !selectee.$element.hasClass('ui-selected');
else
doSelect = !selectee.$element.hasClass('ui-selected');
在同一个 _mouseStart 方法中，查找以下代码
this.selectees.filter('.ui-selected').each(function() {
var selectee = $.data(this, "selectable-item");
selectee.startselected = true;
if (!event.metaKey) {
selectee.$element.removeClass('ui-selected');
selectee.selected = false;
selectee.$element.addClass('ui-unselecting');
selectee.unselecting = true;
// selectable UNSELECTING callback
self._trigger("unselecting", event, {
unselecting: selectee.element
});
}
});
并更改条件以检查 multi_no_key 的选项
this.selectees.filter('.ui-selected').each(function() {
var selectee = $.data(this, "selectable-item");
selectee.startselected = true;
if (!event.metaKey && options.multi_no_key == false) {
selectee.$element.removeClass('ui-selected');
selectee.selected = false;
selectee.$element.addClass('ui-unselecting');
selectee.unselecting = true;
// selectable UNSELECTING callback
self._trigger("unselecting", event, {
unselecting: selectee.element
});
}
});
我对此进行了测试，它对我来说效果很好。下面是可选择的js文件（1.8.12版本）的全部内容
/*
* jQuery UI Selectable 1.8.12
*
* Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* http://docs.jquery.com/UI/Selectables
*
* Depends:
* jquery.ui.core.js
* jquery.ui.mouse.js
* jquery.ui.widget.js
*/
(function( $, undefined ) {
$.widget("ui.selectable", $.ui.mouse, {
options: {
appendTo: 'body',
autoRefresh: true,
distance: 0,
filter: '*',
tolerance: 'touch',
multi_no_key: false
},
_create: function() {
var self = this;
this.element.addClass("ui-selectable");
this.dragged = false;
// cache selectee children based on filter
var selectees;
this.refresh = function() {
selectees = $(self.options.filter, self.element[0]);
selectees.each(function() {
var $this = $(this);
var pos = $this.offset();
$.data(this, "selectable-item", {
element: this,
$element: $this,
left: pos.left,
top: pos.top,
right: pos.left + $this.outerWidth(),
bottom: pos.top + $this.outerHeight(),
startselected: false,
selected: $this.hasClass('ui-selected'),
selecting: $this.hasClass('ui-selecting'),
unselecting: $this.hasClass('ui-unselecting')
});
});
};
this.refresh();
this.selectees = selectees.addClass("ui-selectee");
this._mouseInit();
this.helper = $("<div class='ui-selectable-helper'></div>");
},
destroy: function() {
this.selectees
.removeClass("ui-selectee")
.removeData("selectable-item");
this.element
.removeClass("ui-selectable ui-selectable-disabled")
.removeData("selectable")
.unbind(".selectable");
this._mouseDestroy();
return this;
},
_mouseStart: function(event) {
var self = this;
this.opos = [event.pageX, event.pageY];
if (this.options.disabled)
return;
var options = this.options;
this.selectees = $(options.filter, this.element[0]);
this._trigger("start", event);
$(options.appendTo).append(this.helper);
// position helper (lasso)
this.helper.css({
"left": event.clientX,
"top": event.clientY,
"width": 0,
"height": 0
});
if (options.autoRefresh) {
this.refresh();
}
this.selectees.filter('.ui-selected').each(function() {
var selectee = $.data(this, "selectable-item");
selectee.startselected = true;
if (!event.metaKey && options.multi_no_key == false) {
selectee.$element.removeClass('ui-selected');
selectee.selected = false;
selectee.$element.addClass('ui-unselecting');
selectee.unselecting = true;
// selectable UNSELECTING callback
self._trigger("unselecting", event, {
unselecting: selectee.element
});
}
});
$(event.target).parents().andSelf().each(function() {
var selectee = $.data(this, "selectable-item");
if (selectee) {
var doSelect;
if(!options.multi_no_key)
doSelect = !event.metaKey || !selectee.$element.hasClass('ui-selected');
else
doSelect = !selectee.$element.hasClass('ui-selected');
selectee.$element
.removeClass(doSelect ? "ui-unselecting" : "ui-selected")
.addClass(doSelect ? "ui-selecting" : "ui-unselecting");
selectee.unselecting = !doSelect;
selectee.selecting = doSelect;
selectee.selected = doSelect;
// selectable (UN)SELECTING callback
if (doSelect) {
self._trigger("selecting", event, {
selecting: selectee.element
});
} else {
self._trigger("unselecting", event, {
unselecting: selectee.element
});
}
return false;
}
});
},
_mouseDrag: function(event) {
var self = this;
this.dragged = true;
if (this.options.disabled)
return;
var options = this.options;
var x1 = this.opos[0], y1 = this.opos[1], x2 = event.pageX, y2 = event.pageY;
if (x1 > x2) { var tmp = x2; x2 = x1; x1 = tmp; }
if (y1 > y2) { var tmp = y2; y2 = y1; y1 = tmp; }
this.helper.css({left: x1, top: y1, width: x2-x1, height: y2-y1});
this.selectees.each(function() {
var selectee = $.data(this, "selectable-item");
//prevent helper from being selected if appendTo: selectable
if (!selectee || selectee.element == self.element[0])
return;
var hit = false;
if (options.tolerance == 'touch') {
hit = ( !(selectee.left > x2 || selectee.right < x1 || selectee.top > y2 || selectee.bottom < y1) );
} else if (options.tolerance == 'fit') {
hit = (selectee.left > x1 && selectee.right < x2 && selectee.top > y1 && selectee.bottom < y2);
}
if (hit) {
// SELECT
if (selectee.selected) {
selectee.$element.removeClass('ui-selected');
selectee.selected = false;
}
if (selectee.unselecting) {
selectee.$element.removeClass('ui-unselecting');
selectee.unselecting = false;
}
if (!selectee.selecting) {
selectee.$element.addClass('ui-selecting');
selectee.selecting = true;
// selectable SELECTING callback
self._trigger("selecting", event, {
selecting: selectee.element
});
}
} else {
// UNSELECT
if (selectee.selecting) {
if (event.metaKey && selectee.startselected) {
selectee.$element.removeClass('ui-selecting');
selectee.selecting = false;
selectee.$element.addClass('ui-selected');
selectee.selected = true;
} else {
selectee.$element.removeClass('ui-selecting');
selectee.selecting = false;
if (selectee.startselected) {
selectee.$element.addClass('ui-unselecting');
selectee.unselecting = true;
}
// selectable UNSELECTING callback
self._trigger("unselecting", event, {
unselecting: selectee.element
});
}
}
if (selectee.selected) {
if (!event.metaKey && !selectee.startselected) {
selectee.$element.removeClass('ui-selected');
selectee.selected = false;
selectee.$element.addClass('ui-unselecting');
selectee.unselecting = true;
// selectable UNSELECTING callback
self._trigger("unselecting", event, {
unselecting: selectee.element
});
}
}
}
});
return false;
},
_mouseStop: function(event) {
var self = this;
this.dragged = false;
var options = this.options;
$('.ui-unselecting', this.element[0]).each(function() {
var selectee = $.data(this, "selectable-item");
selectee.$element.removeClass('ui-unselecting');
selectee.unselecting = false;
selectee.startselected = false;
self._trigger("unselected", event, {
unselected: selectee.element
});
});
$('.ui-selecting', this.element[0]).each(function() {
var selectee = $.data(this, "selectable-item");
selectee.$element.removeClass('ui-selecting').addClass('ui-selected');
selectee.selecting = false;
selectee.selected = true;
selectee.startselected = true;
self._trigger("selected", event, {
selected: selectee.element
});
});
this._trigger("stop", event);
this.helper.remove();
return false;
}
});
$.extend($.ui.selectable, {
version: "1.8.12"
});
})(jQuery);
【讨论】：
老实说，我只是对 'c.metaKey' 进行了查找/替换，并在 jqui 脚本上将其替换为 'true /* edit */'... 很脏，但很有效。
【讨论】：