jQWidgets jqxKnob dragStartAngle属性用法及代码示例

jQWidgets 是一个 JavaScript 框架，用于为 PC 和移动设备制作基于 Web 的应用程序。它是一个非常强大、优化、独立于平台且得到广泛支持的框架。 jqxKnob 用于表示具有圆形形状并在指定值范围内显示可拖动指示器的 jQuery 插件。此 API 还可以在表或矩阵中使用，用于显示指定数据区域中一系列值中字段的相对值。

拖动起始角度属性用于设置或获取指定 jqxKnob 可以开始拖动指针的角度。

用法:

用于设置拖动起始角度属性。

$('#jqxKnob').jqxKnob({dragStartAngle: 60 });

为了得到拖动起始角度属性。

var allowValueChangeOnClick = 
    $('#jqxKnob').jqxKnob('dragStartAngle');

链接文件：下载jQWidgets从给定的链接。在 HTML 文件中，找到下载文件夹中的脚本文件。

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery.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/jqxdraw.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxknob.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxnumberinput.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqx-all.js”></script>

例子：下面的示例说明了 jQWidgets jqxKnob拖动起始角度属性。在下面的示例中，值拖动起始角度属性已设置为 60。

HTML


<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <link rel="stylesheet" 
          href="jqwidgets/styles/jqx.base.css" 
          type="text/css"/> 
    <script type="text/javascript" 
            src="scripts/jquery.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/jqxdraw.js"> 
    </script> 
    <script type="text/javascript" 
            src="jqwidgets/jqxknob.js"> 
    </script> 
    <script type="text/javascript" 
            src="jqwidgets/jqxnumberinput.js"> 
    </script> 
    <script type="text/javascript" 
            src="jqwidgets/jqx-all.js"> 
    </script> 
</head> 
<body> 
    <center> 
        <h1 style="color:green;"> 
            GeeksforGeeks 
        </h1> 
        <h3> jQWidgets jqxKnob dragStartAngle Property </h3> 
        <div id='jqx_Knob'> 
            <center> 
                GeeksforGeeks 
            </center> 
        </div> 
        <input type="button" style="margin:65px;" 
               id="button_for_dragStartAngle"
               value="Value of the dragStartAngle property"/> 
        <div id="log"></div> 
        <script type="text/javascript"> 
            $(document).ready(function () { 
                $('#jqx_Knob').jqxKnob({ 
                    value: 5, 
                    min: 0, 
                    max: 50, 
                    dragStartAngle: 60, 
                    startAngle: 0, 
                    endAngle: 360, 
                    snapToStep: true, 
                    marks: { 
                        colorRemaining: { color: 'red' }, 
                        colorProgress: { color: 'green' }, 
                        offset: '70%', 
                        thickness: 5, 
                        size: '4%' 
                    }, 
                    labels: { 
                        offset: '85%', 
                        step: 5 
                    }, 
                    progressBar: { 
                        style: { 
                            fill: 'yellow', 
                            stroke: 'black' 
                        }, 
                        size: '8%', 
                        offset: '61%', 
                        background: { fill: 'black' } 
                    }, 
                    pointer: { 
                        type: 'arrow', 
                        style: { fill: 'green' }, 
                        size: '68%', 
                        offset: '29%', 
                        thickness: 15 
                    } 
                }); 
                $("#button_for_dragStartAngle").jqxButton({ 
                    width: 350, 
                    theme: 'energyblue' 
                }); 
                $('#button_for_dragStartAngle') 
                .jqxButton().click(function () { 
                    var value_of_dragStartAngle = 
                        $('#jqx_Knob').jqxKnob('dragStartAngle'); 
                    $("#log").html(value_of_dragStartAngle); 
                }) 
            }); 
        </script> 
    </center> 
</body> 
</html>

输出：

参考： https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxknob/jquery-knob-api.htm?search=

相关用法

注：本文由纯净天空筛选整理自Kanchan_Ray大神的英文原创作品 jQWidgets jqxKnob dragStartAngle Property。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。