jQWidgets jqxKnob dragStartAngle屬性用法及代碼示例

jQWidgets 是一個 JavaScript 框架，用於為 PC 和移動設備製作基於 Web 的應用程序。它是一個非常強大、優化、獨立於平台且得到廣泛支持的框架。 jqxKnob 用於表示具有圓形形狀並在指定值範圍內顯示可拖動指示器的 jQuery 插件。此 API 還可以在表或矩陣中使用，用於顯示指定數據區域中一係列值中字段的相對值。

拖動起始角度屬性用於設置或獲取指定 jqxKnob 可以開始拖動指針的角度。

用法:

用於設置拖動起始角度屬性。

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

為了得到拖動起始角度屬性。

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

鏈接文件：下載jQWidgets從給定的鏈接。在 HTML 文件中，找到下載文件夾中的腳本文件。

<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：下麵的示例說明了 jQWidgets jqxKnob拖動起始角度屬性。在下麵的示例中，值拖動起始角度屬性已設置為 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>

輸出：

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

相關用法

注：本文由純淨天空篩選整理自Kanchan_Ray大神的英文原創作品 jQWidgets jqxKnob dragStartAngle Property。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。