jQWidgets是一款流行的JavaScript UI框架，其中jqxScheduler控件提供了日程安排和时间表的功能。scrollWidth()方法是其中一个非常有用的方法，可以用于获取水平滚动条的宽度，实现滚动相关的逻辑。
语法和参数
scrollWidth()方法不需要传递任何参数，常见的语法如下：
var scrollWidth = $("#jqxScheduler").jqxScheduler("scrollWidth");
其中，#jqxScheduler是我们div元素的ID，jqxScheduler是我们初始化jqxScheduler控件时指定的ID。
返回值
scrollWidth()方法返回水平滚动条的宽度（单位是像素），如果控件没有水平滚动条，则返回0。
示例1
下面是一个简单的示例，演示如何使用scrollWidth()方法获取水平滚动条的宽度：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jqxScheduler scrollWidth()方法示例</title>
<link rel="stylesheet" href="../jqwidgets/styles/jqx.base.css" type="text/css" />
<script type="text/javascript" src="../scripts/jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxcore.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxbuttons.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxscrollbar.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxmenu.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxdata.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxscheduler.js"></script>
</head>
<body>
<div id="scheduler"></div>
<script type="text/javascript">
$(document).ready(function () {
$("#scheduler").jqxScheduler({
width: "100%",
height: "600px",
date: new $.jqx.date().addDays(-new Date().getDay()),
view: "agendaWeek",
resources:
{
dataType: "json",
dataFields: [
{ name: "id", type: "string" },
{ name: "name", type: "string" }
],
url: "../sampledata/resources.txt"
},
appointmentDataFields:
{
from: "start",
to: "end",
id: "id",
description: "description",
location: "place",
subject: "subject",
resourceId: "calendar"
},
appointments:
{
dataType: "json",
url: "../sampledata/appointments.txt",
dataFields: [
{ name: "id", type: "string" },
{ name: "description", type: "string" },
{ name: "location", type: "string" },
{ name: "subject", type: "string" },
{ name: "calendar", type: "string" },
{ name: "start", type: "date", format: "yyyy-MM-dd HH:mm" },
{ name: "end", type: "date", format: "yyyy-MM-dd HH:mm" }
]
}
});
// 获取水平滚动条的宽度
var scrollWidth = $("#scheduler").jqxScheduler("scrollWidth");
console.log("水平滚动条的宽度：" + scrollWidth);
});
</script>
</body>
</html>
在上面的示例中，我们创建了一个jqxScheduler控件，然后调用scrollWidth()方法获取滚动条的宽度，并将结果打印到控制台。
示例2
下面是一个更高级的例子，演示如何使用scrollWidth()方法改变控件的滚动逻辑。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jqxScheduler scrollWidth()方法示例</title>
<link rel="stylesheet" href="../jqwidgets/styles/jqx.base.css" type="text/css" />
<script type="text/javascript" src="../scripts/jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxcore.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxbuttons.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxscrollbar.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxmenu.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxdata.js"></script>
<script type="text/javascript" src="../jqwidgets/jqxscheduler.js"></script>
</head>
<body>
<div id="scheduler"></div>
<script type="text/javascript">
$(document).ready(function () {
var scheduler = $("#scheduler").jqxScheduler({
width: "100%",
height: "600px",
date: new $.jqx.date().addDays(-new Date().getDay()),
view: "agendaWeek",
resources:
{
dataType: "json",
dataFields: [
{ name: "id", type: "string" },
{ name: "name", type: "string" }
],
url: "../sampledata/resources.txt"
},
appointmentDataFields:
{
from: "start",
to: "end",
id: "id",
description: "description",
location: "place",
subject: "subject",
resourceId: "calendar"
},
appointments:
{
dataType: "json",
url: "../sampledata/appointments.txt",
dataFields: [
{ name: "id", type: "string" },
{ name: "description", type: "string" },
{ name: "location", type: "string" },
{ name: "subject", type: "string" },
{ name: "calendar", type: "string" },
{ name: "start", type: "date", format: "yyyy-MM-dd HH:mm" },
{ name: "end", type: "date", format: "yyyy-MM-dd HH:mm" }
]
}
});
// 获取水平滚动条的宽度
var scrollWidth = scheduler.jqxScheduler("scrollWidth");
// 根据水平滚动条的宽度调整视图设置
if (scrollWidth > 0) {
scheduler.jqxScheduler("setView", "agendaWeek", new $.jqx.date().addDays(-new Date().getDay()), "", 975 - scrollWidth);
} else {
scheduler.jqxScheduler("setView", "agendaWeek", new $.jqx.date().addDays(-new Date().getDay()), "", 975);
}
});
</script>
</body>
</html>
在上面的示例中，我们也创建了一个jqxScheduler控件，并调用scrollWidth()方法获取滚动条的宽度。根据获取到的宽度，我们可以调用jqxScheduler(“setView”)方法切换视图，并根据宽度调整视图的宽度参数，以达到更好的用户体验。