Dojo学习笔记(十五):Dojo滑动条Slider

简介:

    Slider没有相对应的 HTML 控件,是一个相对独立的图形化的组件,可以通过鼠标、方向键来控制刻度尺的刻度。Dijit提供了水平和垂直滑动条。

    Slider widget的使用却如同使用 CheckBox widget一样的方便。用户可以用鼠标点击、拖拉、中键滚动或者用键盘的上、下、左、右按键来选择Slider widget的刻度。

    Silder 是由六个 widgets 组成,分别是:dijit.form.HorizontalSlider, dijit.form.VerticalSlider,dijit.form.HorizontalRule, dijit.form.VerticalRule,dijit.form.HorizontalRuleLabels, dijit.form.VerticalRuleLabels。        

    dijit.form.HorizontalSlider是水平方向的slider, dijit.form.VerticalSlider 是垂直方向的slider,提供可调节大小的标尺。其属性如下:

滑动条:HorizontalSlider 和 VerticalSlider 的属性

属性 属性类别 描述
clickSelect boolean
true
指定单击进度条是否可以更改刻度值
discreteValues integer
Infinity
在最大值与最小值之间可以设置的非连续值得个数
intermediateChanges Boolean
false
判断在调用 setValue 方法时是否直接触发 onChange 事件。如果为’ true ’,则每次执行 setValue 方法时都会触发 onChange 事件;如果为’ false ’,则 onChange 事件只有在自己被调用时才会被触发。
maximum integer
100
可设置的最大刻度值
minimum integer
0
可设置的最小刻度值
pageIncrement integer
2
点击键盘按键 pageup/pagedown 时一次变化的刻度值
showButtons boolean
true
指定是否在刻度条两端显示增加和减小的按钮

    函数increment()表示以1单位为步长增加滑动条的值;函数decrement()表示以1单位为步长减少滑动条的值。

刻度尺:HorizontalRule 和 VerticalRule 的属性

属性 属性类别 描述
container Node
containerNode
设置刻度尺或文本标签相对于滑动条的位置,HorizontalSlider使用topDecoration或bottomDecoration,VerticalSlider使用leftDecoration或rightDecoration。
count Integer
3
指定生成刻度线的数量
ruleStyle String 指定刻度线设置 CSS style

    dijit.form.HorizontalRuleLabels, dijit.form.VerticalRuleLabels 可以为标尺提供刻度标签,其属性如下:

标签:HorizontalRuleLabels 和 VerticalRuleLabels 的属性

属性 属性类别 描述
labels Array
[]
文本标签的数组,存放要展现的标签值
labelStyle String 指定为文本标签设置 CSS style
minimum

Integer

0

在没有指定标签数组情况下,以这个值最左(下)端标签
maximum

Integer

1

在没有指定标签数组情况下,以这个值最右(上)端标签
getLabels

Function

[]

返回labels数组
constraints

Object

{pattern:"#%"}

在没有指定标签数组情况下,使用这个对象包含的模式来生成数字标签


--声明方式:

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<!DOCTYPE HTML>
<html lang= "en" >
<head>
     <meta charset= "utf-8" >
     <title>Demo: Slider</title>
     <link rel= "stylesheet"  href= "dijit/themes/claro/claro.css" >
     <script src= "dojo/dojo.js"  data-dojo-config= "async: true, parseOnLoad: true" ></script>
     <script>
         // 导入slider所需类
         require([ "dijit/form/VerticalSlider" "dojo/parser" ]);
     </script>
</head>
<body  class = "claro" >
<input id= "vertSlider"     data-dojo-type= "dijit/form/VerticalSlider"
        data-dojo-props= "minimum: 0,maximum: 100,pageIncrement: 20,value: 20,intermediateChanges: true,style: 'height: 200px;'" >
</body>
</html>

--编程方式:

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<!DOCTYPE HTML>
<html lang= "en" >
<head>
     <meta charset= "utf-8" >
     <title>Demo: Slider</title>
     <link rel= "stylesheet"  href= "dijit/themes/claro/claro.css" >
     <script src= "dojo/dojo.js"  data-dojo-config= "async: true, parseOnLoad: true" ></script>
     <script>
         // 导入slider所需类
         require([ "dijit/form/VerticalSlider" ],  function (VerticalSlider) {
         //创建垂直滑动条
             var  vertSlider =  new  VerticalSlider({
                 minimum:  0 ,
                 maximum:  100 ,
                 pageIncrement:  20 ,
                 value:  20 ,
                 intermediateChanges:  true ,
                 style:  "height: 200px;"
             },  "vertSlider" );
             // Start up the widget
             vertSlider.startup();
         });
     </script>
</head>
<body  class = "claro" >
<input id= "vertSlider"  />
</body>
</html>

输出:

wKioL1RYmW_TYP-fAAANP0LKVfM164.jpg


--添加文本标签,创建水平滑动条:

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<!DOCTYPE HTML>
<html lang= "en" >
<head>
     <meta charset= "utf-8" >
     <title>Demo: Slider</title>
     <link rel= "stylesheet"  href= "dijit/themes/claro/claro.css" >
     <script src= "dojo/dojo.js"  data-dojo-config= "async: true, parseOnLoad: true" ></script>
     <script>
         // 导入slider所需类
         require([ "dijit/form/HorizontalSlider" "dijit/form/HorizontalRuleLabels" "dijit/form/HorizontalRule" "dojo/parser" ]);
     </script>
</head>
<body  class = "claro" >
<div style= "width: 600px;margin-left: 30px;" >
     <!-- 创建水平滑动条标签-->
     <ol data-dojo-type= "dijit/form/HorizontalRuleLabels"
         data-dojo-props= "container: 'topDecoration',count: 11,numericMargin: 0"
         style= "height: 1.2em; font-weight: bold" >
     </ol>
     <!-- 创建水平滑动条刻度尺-->
     <div data-dojo-type= "dijit/form/HorizontalRule"
          data-dojo-props= "container: 'topDecoration',count: 11"
          style= "height: 5px;margin:0  12px;" >
     </div>
     <!--创建水平滑动条,隐藏滑动条两端button-->
     <input id= "hslider"  type= "range"  value= "3"
            data-dojo-type= "dijit/form/HorizontalSlider"
            data-dojo-props= "minimum: 0,maximum: 10,showButtons: false,discreteValues: 11" >
     <!-- 创建水平滑动条刻度尺-->
     <div data-dojo-type= "dijit/form/HorizontalRule"
          data-dojo-props= "container: 'bottomDecoration',count: 5"
          style= "height: 5px; margin: 0 12px;" >
     </div>
     <!-- 创建水平滑动条标签-->
     <ol data-dojo-type= "dijit/form/HorizontalRuleLabels"
         data-dojo-props= "container: 'bottomDecoration'"
         style= "height: 1em; font-weight: bold;" >
         <li>lowest</li>
         <li></li>
         <li>lowest2</li>
         <li>normal</li>
         <li>highest</li>
     </ol>
</div>
</body>
</html>

输出:

wKiom1RYq2WgF4IfAABVGxgWhlk780.jpg


--添加文本标签,创建垂直滑动条:

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<!DOCTYPE HTML>
<html lang= "en" >
<head>
     <meta charset= "utf-8" >
     <title>Demo: Slider</title>
     <link rel= "stylesheet"  href= "dijit/themes/claro/claro.css" >
     <script src= "dojo/dojo.js"  data-dojo-config= "async: true, parseOnLoad: true" ></script>    
</head>
<body  class = "claro" >
<div id= "vertSlider" ></div>
<script>
     require([ "dijit/form/VerticalSlider" "dijit/form/VerticalRuleLabels" "dijit/form/VerticalRule" "dojo/dom-construct" "dojo/parser" "dojo/dom" "dojo/domReady!" ],
             function (VerticalSlider, VerticalRuleLabels, VerticalRule, domConstruct, parser, dom) {
                 // 创建刻度尺
                 var  rulesNode = domConstruct.create( "div" , {}, dom.byId( "vertSlider" ),  "first" );
                 var  sliderRules =  new  VerticalRule({container:  "leftDecoration" ,count:  11 ,style:  "width: 5px;" }, rulesNode);
                 // 创建标签
                 var  labelsNode = domConstruct.create( "div" , {}, dom.byId( "vertSlider" ),  "first" );
                 var  sliderLabels =  new  VerticalRuleLabels({container:  "rightDecoration" ,labelStyle:  "font-style: italic; font-size: 0.75em" }, labelsNode);
                 // 创建垂直滑动条
                 var  vertSlider =  new  VerticalSlider({minimum:  0 ,maximum:  100 ,pageIncrement:  20 ,value:  20 ,intermediateChanges:  true ,style:  "height: 200px;" },  "vertSlider" );
                 // 生成小部件
                 vertSlider.startup();
                 sliderRules.startup();
                 sliderLabels.startup();
             });
</script>
</body>
</html>

输出:

wKiom1RYsG6hvY-xAAAWd2-dVIw434.jpg


--创建水平刻度:

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<!DOCTYPE HTML>
<html lang= "en" >
<head>
     <meta charset= "utf-8" >
     <title>Demo: Slider</title>
     <link rel= "stylesheet"  href= "dijit/themes/claro/claro.css" >
     <script src= "dojo/dojo.js"  data-dojo-config= "async: true, parseOnLoad: true" ></script>
     <script>
         // 导入slider所需类
         require([ "dijit/form/HorizontalSlider" "dijit/form/HorizontalRuleLabels" "dijit/form/HorizontalRule" "dojo/parser" ]);
     </script>
</head>
<body  class = "claro" >
<div dojoType= "dijit.form.HorizontalSlider"  name= "caffeine"
      value= "100"
      maximum= "175"
      minimum= "2"
      showButtons= "false"
      style= "margin: 5px;width:300px; height: 20px;" >
     <script type= "dojo/method"  event= "onChange"  args= "newValue" >
         console.log(newValue);
     </script>
     <ol dojoType= "dijit.form.HorizontalRuleLabels"  container= "topDecoration"
         style= "height:10px;font-size:75%;color:gray;"  count= "6" >
     </ol>
     <div dojoType= "dijit.form.HorizontalRule"  container= "topDecoration"
          count= 6  style= "height:5px;" >
     </div>
     <div dojoType= "dijit.form.HorizontalRule"  container= "bottomDecoration"
          count= 5  style= "height:5px;" >
     </div>
     <ol dojoType= "dijit.form.HorizontalRuleLabels"  container= "bottomDecoration"
         style= "height:10px;font-size:75%;color:gray;" >
         <li>green<br>tea</li>
         <li>coffee</li>
         <li>red<br>bull</li>
     </ol>
</div>
</body>
</html>

输出:

wKioL1RYsoiBB6KgAAAkmq__a0c486.jpg

--创建垂直刻度

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<!DOCTYPE HTML>
<html lang= "en" >
<head>
     <meta charset= "utf-8" >
     <title>Demo: Slider</title>
     <link rel= "stylesheet"  href= "dijit/themes/claro/claro.css" >
     <script src= "dojo/dojo.js"  data-dojo-config= "async: true, parseOnLoad: true" ></script>
     <script>
         // 导入slider所需类
         require([ "dijit/form/VerticalSlider" "dijit/form/VerticalRuleLabels" "dijit/form/VerticalRule" "dojo/parser" ]);
     </script>
</head>
<body  class = "claro" >
<div dojoType= "dijit.form.VerticalSlider"  name= "caffeine"
      value= "100"
      maximum= "175"
      minimum= "2"
      showButtons= "false"
      style= "margin: 5px;width:75px; height: 300px;" >
     <script type= "dojo/method"  event= "onChange"  args= "newValue" >
         console.log(newValue);
     </script>
     <ol dojoType= "dijit.form.VerticalRuleLabels"  container= "leftDecoration"
         style= "height:300px;width:25px;font-size:75%;color:gray;"  count= "6" >
     </ol>
     <div dojoType= "dijit.form.VerticalRule"  container= "leftDecoration"
          count= 6  style= "height:300px;width:5px;" >
     </div>
     <div dojoType= "dijit.form.VerticalRule"  container= "rightDecoration"
          count= 5  style= "height:300px;width:5px;" >
     </div>
     <ol dojoType= "dijit.form.VerticalRuleLabels"  container= "rightDecoration"
         style= "height:300px;width:25px;font-size:75%;color:gray;" >
         <li>green&nbsp;tea</li>
         <li>coffee</li>
         <li>red&nbsp;bull</li>
     </ol>
</div>
</body>
</html>

输出:

wKioL1RYs7HBIaUjAAAqslNwD98073.jpg


    总结:分为三步(1)创建滑动条(2)创建刻度尺(3)创建标签。






参考:

http://dojotoolkit.org/documentation/tutorials/1.10/sliders/

http://www.ibm.com/developerworks/cn/web/wa-lo-dojointro5/

http://www.ibm.com/developerworks/cn/views/web/libraryview.jsp?search_by=掌握+Dojo






     本文转自stock0991 51CTO博客,原文链接:http://blog.51cto.com/qing0991/1571645,如需转载请自行联系原作者








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