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HarmonyOS Developer 常见组件开发指导
丶龙八夷
发布于 2023-3-25 21:34
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chart开发指导
chart为图表组件，用于呈现线形图、柱状图和量规图界面。具体用法请参考chart。
创建chart组件
在pages/index目录下的hml文件中创建一个chart组件。
<!-- xxx.hml -->
<div class="container">
<chart class="chart-data" type="line" options="{{lineOps}}" datasets="{{lineData}}"></chart>
</div>
/* xxx.css */
.container {
width: 100%;
height: 100%;
flex-direction: column;
justify-content: center;
align-items: center;
background-color: #F1F3F5;
}
.chart-data {
width: 700px;
height: 600px;
}
// xxx.js
export default {
data: {
lineData: [
{
data: [763, 550, 551, 554, 731, 654, 525, 696, 595, 628, 791, 505, 613, 575, 475, 553, 491, 680, 657, 716]
}
],
lineOps: {
xAxis: {
min: 0,
max: 20,
display: false,
},
yAxis: {
min: 0,
max: 1000,
display: false,
},
series: {
lineStyle: {
width: 15,
},
}
},
}
}
设置图表类型
chart组件通过设置type属性定义图表t类型，如将图表设置为柱状图。
<!-- xxx.hml -->
<div class="container">
<div class="container">
<div class="switch-block">
<text class="title">
{{ title }}
</text>
</div>
<tabs class="tabs" index="0" vertical="false" onchange="changes">
<tab-content class="tabcontent" scrollable="true">
<tabs >
<tab-bar class="tab-bar" mode="fixed"style="margin-bottom: 50px;">
<text class="tab-text">线形图</text>
<text class="tab-text">柱状图</text>
<text class="tab-text">量规图</text>
</tab-bar>
<tab-content>
<div class="bar-block" style="margin-left: 30px;">
<chart class="chart-data" type="line" ref="linechart" options="{{ lineOps }}" datasets="{{ lineData }}">
</chart>
</div>
<div class="bar-block">
<chart class="data-bar" type="bar" id="bar-chart" options="{{ barOps }}" datasets="{{ barData }}">
</chart>
</div>
<div class="chart-block">
<chart type="gauge" ></chart>
</div>
</tab-content>
</tabs>
</tab-content>
</tabs>
</div>
</div>
/* xxx.css */
.container {
width: 100%;
height: 100%;
flex-direction: column;
justify-content: center;
background-color: #F1F3F5;
}
.tab-bar{
background-color: #F1F3F5;
}
.chart-data {
width: 700px;
height: 600px;
}
.title{
margin-left: 50px;
margin-top: 50px;
font-size: 50px;
}
.line-block{
align-items: center;
justify-content: center;
}
.bar-block{
align-items: center;
justify-content: center;
}
.chart-block{
width: 90%;
margin-left: 30px;
}
// xxx.js
export default {
data: {
title: "类型展示",
barData: [
{
fillColor: '#3848e8',
data: [763, 550, 551, 554, 731, 654, 525, 696, 595],
}
],
lineData: [
{
strokeColor: '#0081ff',
fillColor: '#cce5ff',
data: [763, 550, 551, 554, 731, 654, 525, 696, 595, 628, 791, 505, 613, 575, 475, 553, 491, 680, 657, 716],
gradient: true,
}
],
lineOps: {
xAxis: {
min: 0,
max: 20,
display: false,
},
yAxis: {
min: 0,
max: 1000,
display: false,
},
series:{
lineStyle: {
width: "5px",
smooth: true,
},
headPoint: {
shape:"circle",
size: 20,
strokeWidth: 5,
fillColor: '#ffffff',
strokeColor: '#007aff',
display: true,
},
loop:{
margin: 2,
gradient: true
}
},
},
barOps: {
xAxis: {
min: 0,
max: 20,
display: false,
axisTick: 10,
},
yAxis: {
min: 0,
max: 1000,
},
},
},
}
说明
chart不支持显示每个点的值。
设置图表属性
chart组件在options属性中设置对x轴、y轴和数据序列参数的设置，在datasets属性里添加对线条颜色、填充颜色、填充渐变颜色和绘制点集的设置。
<!-- xxx.hml -->
<div class="container">
<chart class="chart-data" type="line" options="{{lineOps}}" datasets="{{lineData}}"></chart>
</div>
/* xxx.css */
.container {
width: 100%;
height: 100%;
flex-direction: column;
justify-content: center;
align-items: center;
background-color: #F1F3F5;
}
.chart-data {
width: 700px;
height: 600px;
}
// xxx.js
export default {
data: {
//线形图数据
lineData: [
{
strokeColor: '#0081ff',
fillColor: '#cce5ff', //填充色
data: [463, 250, 251, 254, 431, 354, 225, 396, 295, 328, 491, 205, 313, 275, 475, 553, 491, 380, 357, 416],
gradient: true,
}
],
lineOps: {
//x轴参数设置
xAxis: {
min: 0,
max: 20,
display: false,
},
//y轴参数设置
yAxis: {
min: 0,
max: 1000,
display: false,
},
//数据序列参数设置
series: {
//线样式设置
lineStyle: {
width: "5px",
smooth: true,
},
//线最前端位置白点的样式和大小
headPoint: {
shape: "circle",
size: 20,
strokeWidth: 5,
fillColor: '#ffffff',
strokeColor: '#007aff',
display: true,
},
//设置屏幕显示满时，是否需要重头开始绘制
loop: {
margin: 2,
gradient: true
}
}
},
},
}
说明
- options只支持柱状图和线形图设置参数，量规图不生效。
- datasets只支持柱状图和线形图设置数据集合，量规图不生效。
- series只有线形图支持。
添加数据
通过chart组件的append方法，实现动态添加数据。
<!-- xxx.hml -->
<div class="container">
<stack class="chart-region">
<chart class="chart-data" type="line" ref="linechart" options="{{lineOps}}" datasets="{{lineData}}"></chart>
</stack>
<button value="Add data" onclick="addData"></button>
</div>
/* xxx.css */
.container {
flex-direction: column;
justify-content: center;
align-items: center;
background-color: #F1F3F5;
}
.chart-region {
height: 400px;
width: 700px;
}
.chart-data {
width: 700px;
height: 600px;
}
button {
width: 100%;
height: 50px;
background-color: #F4F2F1;
text-color: #0C81F3;
margin-top: 30px;
}
// xxx.js
export default {
data: {
lineData: [
{
strokeColor: '#de0b6e',
fillColor: '#bb09a3',
data: [763, 550, 551, 554, 731, 654, 525, 696, 595, 628, 791, 505, 613, 575, 475, 553, 491, 680, 657, 716],
gradient: true,
}
],
lineOps: {
xAxis: {
min: 0,
max: 20,
display: false,
},
yAxis: {
min: 0,
max: 1000,
display: false,
},
series: {
lineStyle: {
width: "5px",
smooth: true,
},
headPoint: {
shape: "circle",
size: 20,
strokeWidth: 5,
fillColor: '#ffffff',
strokeColor: '#f8145c',
display: true,
},
loop: {
margin: 2,
gradient: true,
}
}
},
},
addData() {
this.$refs.linechart.append({
serial: 0,
data: [Math.floor(Math.random() * 400) + 200]
})
}
}
场景示例
开发者可以根据开关Switch的状态来选择数据展示的状态，当Switch状态为true时，通过定时器来实现数据的动态展示。
<!-- xxx.hml -->
<div class="container">
<div class="container">
<div class="switch-block">
<text class="title">{{ title }} </text>
<switch class="switch" showtext="{{ showText }}" allow-scale="{{ allowScale }}"onchange="change">
</switch>
</div>
<tabs class="tabs" index="0" vertical="false" onchange="changes">
<tab-content class="tabcontent" scrollable="true">
<div>
<tabs class="tabs" index="0" vertical="false" onchange="changes">
<tab-content class="tabcontent" scrollable="true">
<div class="line-class">
<div class="bar-block">
<chart class="chart-data" type="line" ref="linechart" options="{{ lineOps }}"
datasets="{{ lineData }}">
</chart>
</div>
<div class="bar-block">
<chart class="data-bar" type="bar" id="bar-chart" options="{{ barOps }}"datasets="{{ barData }}">
</chart>
</div>
</div>
</tab-content>
</tabs>
</div>
<div>
<div class="container">
<list class="todo-wrapper">
<list-item for="{{ barData }}" class="todo-item">
<text class="todo-title">{{ $item.data }}</text>
</list-item>
</list>
<list class="todo-wrapper">
<list-item for="{{ lineData.data }}" class="todo-item">
<text class="todo-title">{{ $item.value }}</text>
</list-item>
</list>
</div>
</div>
</tab-content>
</tabs>
</div>
</div>
/* xxx.css */
.container{
display:flex;
flex-direction:column;
background-color: #F1F3F5;
}
.line-class{
display: flex;
flex-direction: column;
}
.title{
font-size: 40px;
margin-left: 40px;
}
.switch-block {
margin-top: 30px;
width: 98%;
height: 80px;
display: flex;
justify-content: space-between;
}
.switch{
font-size: 40px;
}
.bar-block {
margin-top: 80px;
margin-left: 40px;
position: relative;
width: 90%;
border-radius: 10px;
background-color: #25FAB27B;
height: 40%;
justify-content: center;
}
// xxx.js
export default {
data: {
interval: null,
title: "数据展示",
allowScale: true,
dataLength: 30,
barGroup: 3,
lineData: null,
lineOps: {
xAxis: {
min: 0,
max: 5
},
yAxis: {
min: 0,
max: 100
},
series: {
lineStyle: {
width: '1px',
},
headPoint: {
shape: 'circle',
size: 10,
strokeWidth: 2,
fillColor: '#ffffff',
strokeColor: '#8477DF'
},
loop: {
margin: 2
}
}
},
barData: [
{
fillColor: '#97CF0A2C',
data: [20, 20,40, 56]
},
{
fillColor: '#6D0A7ACF',
data: [52, 40, 2, 67]
},
{
fillColor: '#6A0ACFA1',
data: [56, 2, 77, 40]
}
],
barOps: {
xAxis: {
min: 0,
max: 20,
axisTick: 5
},
yAxis: {
min: 0,
max: 100
}
}
},
onInit() {
this.changeLine();
},
change(e) {
if (e.checked) {
this.interval = setInterval(() => {
this.changeLine();
this.changeBar();
}, 1000)
} else {
clearInterval(this.interval);
}
},
changeLine() {
var dataArray = [];
for (var i = 0; i < this.dataLength; i++) {
var nowValue = Math.floor(Math.random() * 99 + 1);
var obj = {
"value": nowValue,
"description": nowValue + "",
"textLocation": "top",
"textColor": "#CDCACA",
"pointStyle": {
"shape": "circle",
"size": 5,
"fillColor": "#CF0A2C",
"strokeColor": "#CF0A2C"
}
};
dataArray.push(obj);
}
this.lineData = [
{
strokeColor: '#0081ff',
fillColor: '#FF07CDC4',
data: dataArray,
gradient: true,
}
]
},
changeBar() {
for (var i = 0;i < this.barGroup; i++) {
var dataArray = this.barData[i].data;
for (var j = 0;j < 4; j++) {
dataArray[j] = Math.floor(Math.random() * 99 + 1);
}
}
this.barData = this.barData.splice(0, this.barGroup + 1);
},
changes(e) {
console.log("Tab index: " + e.index);
},
}
switch开发指导
switch为开关选择器，切换开启或关闭状态。具体用法请参考switch。
创建switch组件
在pages/index目录下的hml文件中创建一个switch组件。
<!-- xxx.hml -->
<div class="container">
<switch checked="true"></switch>
</div>
/* xxx.css */
.container {
flex-direction: column;
background-color: #F1F3F5;
}
添加属性和方法
switch组件通过textoff和showtext属性设置文本选中和未选中时的状态。设置checked属性值为true（组件为打开状态）。添加change事件，当组件状态改变时触发，触发后执行switchChange函数获取组件当前状态（关闭/打开）。
<!-- xxx.hml -->
<div class="container">
<switch showtext="true" texton="open" textoff="close" checked="true" @change="switchChange"></switch>
</div>
/* xxx.css */
.container {
width: 100%;
height: 100%;
display: flex;
justify-content: center;
align-items: center;
background-color: #F1F3F5;
}
switch {
texton-color: #002aff;
textoff-color: silver;
text-padding: 20px;
font-size: 50px;
}
// xxx.js
import promptAction from '@ohos.promptAction';
export default {
switchChange(e){
if(e.checked){
promptAction.showToast({
message: "open"
});
}else{
promptAction.showToast({
message: "close"
});
}
}
}
说明
当showtext属性值设置为true时，texton和textoff设置的文本才会生效。
场景示例
在下面示例中设置开关为打开状态（使用默认收货地址），关闭开关后页面显示选择地址按钮，点击按钮即可改变收货地址。
实现方法：创建switch开关，设置checked属性为true，通过数据绑定改变收货地址。设置display属性（默认为none），当关闭开关改变display属性值为flex后显示地址模块，点击按钮改变颜色。
<!-- xxx.hml -->
<div class="container">
<div class="change">
<text>Choose default address:</text>
<switch showtext="true" texton="on" textoff="off" checked="true" @change="switchChange"></switch>
</div>
<div class="content">
<text class="address"><span>Shipping address:</span><span class="textSpan">{{address}}</span></text>
</div>
<div class="myAddress" style="display: {{addressDisplay}};">
<text style="font-size: 30px;margin-bottom: 50px;">Choose an address:</text>
<text class="addressText" style="background-color: {{item == address?'#0fabe7':''}};color: {{item == address?'white':'black'}};"
for="item in addressList"@click="changeAddress({{$idx}}})">{{item}}</text>
</div>
</div>
/* xxx.css */
.container {
width: 100%;
height: 100%;
background-color: #F1F3F5;
flex-direction: column;
padding: 50px;
}
.change{
margin-top: 20%;
width: 100%;
justify-content: center;
}
switch{
texton-color: #002aff;
textoff-color: silver;
text-padding: 20px;
}
.content{
width: 70%;
text-align: center;
flex-direction: column;
border: 1px solid #002aff;
margin-left: 15%;
text-align: center;
}
.address{
width: 100%;
height: 100px;
line-height: 100px;
text-align: center;
font-size: 28px;
margin-bottom: 50px;
}
.textSpan{
color: #0aa9f1;
}
.myAddress{
flex-direction: column;
margin-top: 50px;
}
.addressText{
margin-left: 35%;
width: 30%;
height: 75px;
text-align: center;
color: white;
margin-bottom: 30px;
border-radius: 10px;
border: 1px solid #0fabe7;
}
// xxx.js
import promptAction from '@ohos.promptAction';
export default {
data:{
address: '',
addressDisplay: 'none',
addressList: ['family','company','commissary'],
},
onInit(){
// 初始化默认地址为地址列表中的第一个
this.address = this.addressList[0];
},
switchChange(e){
if(e.checked){
this.addressDisplay = "none";
}else{
this.addressDisplay = "flex";
}
},
changeAddress(i){
this.address= this.addressList[i];
}
}
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