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【Journey of HarmonyOS Next】Developing Based on ArkTS (3) -> JS-compatible Web Development (4) -> stepper

#harmonyosnext #devecostudio

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1 -> Create a Stepper component

Create a stepper component in the hml file in the pages/index directory.

<!-- index.hml -->
<div class="container"> 
 <stepper>    
   <stepper-item>     
     <text>Step 1</text>
   </stepper-item> 
   <stepper-item>     
     <text>Step 2</text>
   </stepper-item> 
 </stepper> 
</div>
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/* test.css */
.container {
  width:100%;
  height:100%;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: #F1F3F5;
}
text{
  width: 100%;
  height: 100%;
  text-align: center;
}
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2 -> Set the index property

By default, the page displays the steps where the index value is index.

<!-- index.hml -->
<div class="container"> 
 <stepper index="2">    
   <stepper-item>     
     <text>stepper-item1</text>
   </stepper-item> 
   <stepper-item>     
     <text>stepper-item2</text>
   </stepper-item> 
   <stepper-item>     
     <text>stepper-item3</text>
   </stepper-item> 
  </stepper> 
</div>
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/* index.css */
.container {
  width:100%;
  height:100%;
  flex-direction: column;
  background-color: #F1F3F5;
}
text{
  width: 100%;
  height: 100%;
  text-align: center;
}
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You can customize the hint button of the stepper-item by setting the label property.

<!-- index.hml -->
<div class="container"> 
 <stepper index="1">    
   <stepper-item label="{{label_1}}">     
     <text>stepper-item1</text>
   </stepper-item> 
   <stepper-item label="{{label_2}}">     
     <text>stepper-item2</text>
   </stepper-item> 
   <stepper-item label="{{label_3}}">     
     <text>stepper-item3</text>
   </stepper-item>
   <stepper-item>     
     <text>stepper-item4</text>
   </stepper-item> 
 </stepper> 
</div>
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/* index.css */
.container {  
  width:100%;
  height:100%;
  flex-direction: column;
  background-color: #F1F3F5;
}
text{
  width: 100%;
  height: 100%;
  text-align: center;
}
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/* index.js */
export default { 
  data: {
    label_1:{
      nextLabel: 'NEXT',      
      status: 'normal'    
    },
    label_2:{
      prevLabel: 'BACK',
      nextLabel: 'NEXT',
      status: 'normal'
    },
    label_3:{
      prevLabel: 'BACK',
      nextLabel: 'END',
      status: 'disabled'
    },
  },
}
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3 -> Set the style

By default, the Stepper component fills the parent container, and sets the border and background color by border and background-color.

<!-- index.hml -->
<div class="container" > 
  <div class="stepperContent">
    <stepper class="stepperClass">    
      <stepper-item>     
        <text>stepper-item1</text>
      </stepper-item> 
    </stepper> 
  </div>
</div>
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/* index.css */
.container {
  width:100%;
  height:100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color:#F1F3F5;
}
.stepperContent{
  width: 300px;
  height: 300px;
}
.stepperClass{
  border:1px solid silver ;
  background-color: white;
}
text{
  width: 100%;
  height: 100%;
  text-align: center;
}
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4 -> Add an event

Stepper分别添加finish，change，next，back，skip事件。

If the change and the next or back exist at the same time, the next or back event will be executed first and then the change event.

When you reset the value of the index attribute, you must first clear the value of index and then set it again, otherwise the value change will not be detected.

<!-- index.hml -->
<div class="container"  style="background-color:#F1F3F5;">
  <div >
    <stepper onfinish="stepperFinish" onchange="stepperChange" onnext="stepperNext" onback="stepperBack" onskip="stepperSkip" id="stepperId" index="{{index}}">
      <stepper-item>
        <text>stepper-item1</text>
        <button value="skip" onclick="skipClick"></button>
      </stepper-item>
      <stepper-item>
         <text>stepper-item2</text>
         <button value="skip" onclick="skipClick"></button>
      </stepper-item>
      <stepper-item>
        <text>stepper-item3</text>
      </stepper-item>
    </stepper>
  </div>
</div>
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/* test.css */
.doc-page {
  width:100%;
  height:100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
stepper-item{
  width: 100%;
  flex-direction: column;
  align-self: center;
  justify-content: center;
}
text{
  margin-top: 45%;
  justify-content: center;
  align-self: center;
  margin-bottom: 50px;
}
button{
  width: 80%;
  height: 60px;
  margin-top: 20px;
}
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/* index.js */
import prompt from '@system.prompt';
export default {
  data: {
    index:0,
  },
   stepperSkip(){
    this.index = null;
    this.index=2;
  },
   skipClick(){
    this.$element('stepperId').setNextButtonStatus({status: 'skip', label: 'SKIP'});
  },
  stepperFinish(){
    prompt.showToast({
      message: 'All Finished'
    })
  },
  stepperChange(e){
    console.log("stepperChange"+e.index)
    prompt.showToast({
      message: 'Previous step: '+e.prevIndex+"-------Current step:"+e.index
    })
  },
  stepperNext(e){
    console.log("stepperNext"+e.index)
    prompt.showToast({
      message: 'Current step:'+e.index+"-------Next step:"+e.pendingIndex
    })
    var index = {pendingIndex:e.pendingIndex }
    return index;
  },
  stepperBack(e){
    console.log("stepperBack"+e.index)
    var index = {pendingIndex: e.pendingIndex }
    return index;
  }
}
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5 -> Scenario Example

In this scenario, you can click Select on the interface to display the selection result in real time, and click the Next button to dynamically modify the font color and font size of the page.

Use the Stepper component to implement step-by-step, then create a Toggle component to select the display function, and then use the Select component to change the selected value to dynamically modify the font color or size.

<div class="container">
  <stepper id="mystep" index="0" onfinish="back" style="text-color: indigo;">
    <stepper-item label="{{label1}}">
      <div style="flex-direction: column;padding: 0px 10px;">
        <text class="text" style="margin-top: 10%;text-align: center;width: 100%;">Select error types:</text>
        <text style="margin-top: 20px;padding: 10px">
          <span>{{error}}</span>
        </text>
        <div style="justify-content: space-around;flex-wrap: wrap;">
          <toggle for="{{togglelist1}}" value="{{$item}}" class="tog" onchange="multiTog({{$item}})"></toggle>
        </div>
      </div>
    </stepper-item>
    <stepper-item label="{{label2}}">
      <div style="flex-direction: column;align-items: center;">
        <text class="txt" style="margin-top: 10%;">Toggle</text>
        <div style="justify-content: space-around;flex-wrap: wrap;;margin-top:10%">
          <toggle class="tog" for="{{togglelist1}}" value="{{$item}}" style="text-color: {{tcolor}};font-size: {{tsize}}; font-style: {{tstyle}};font-weight: {{tweight}};font-family: {{tfamily}};">
          </toggle>
        </div>
        <div style="flex-wrap: wrap;width: 700px;margin-top:10%">
          <div style="flex-direction: column;width: 350px;height: 185px;align-items: center;">
            <text class="txt">text-color</text>
            <select onchange="settcolor">
              <option for="{{color_list}}" value="{{$item}}">{{$item}}</option>
            </select>
          </div>
          <div style="flex-direction: column;width: 350px;height: 185px;align-items: center;">
            <text class="txt">font-size</text>
            <select onchange="settsize">
              <option for="{{size_list}}" value="{{$item}}">{{$item}}</option>
            </select>
          </div>
        </div>
      </div>
    </stepper-item>
  </stepper>
</div>
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/* test.css */
.container {
  width:100%;
  height:100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color:#F1F3F5;
}
.dvd {
  stroke-width: 8px;
  color: orangered;
  margin: 65px;
}
.tog{
  margin-right: 20px;
  margin-top: 30px;
}
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/* index.js */
import prompt from '@system.prompt';
import router from '@system.router';
let myset = new Set();
export default {
  data: {
    error: '',
    tcolor:'#FF4500',
    color_list:['#FF4500','#5F9EA0','#0000FF'],
    tsize: '12px',
    size_list: ['12px', '30px', '8px', '50px'],
    label1: {
      prevLabel: 'The text on the left of the starting step is invalid.',
      nextLabel: 'Toggle'
    },
    label2: {
      prevLabel: 'toggle',
      nextLabel: 'END'
    },
    togglelist1:['Program error', 'Software', 'System', 'Application'],
  },
  multiTog(arg, e) {
    this.error = ' '
    if (e.checked) {
      myset.add(arg)
    } else {
      myset.delete(arg)
    }
    for (let item of myset) {
      this.error += item + ' '
    }
  },
  settcolor(e) {
    this.tcolor = e.newValue
  },
  settsize(e) {
    this.tsize = e.newValue
  }
}
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