I have a Range Slider veeno
and i whant return 2 values in template, min value and max value
In the model, I can only bind to one parameter, but I need several, such as the maximum value and minimum value
How do I implement a dual v-model?
This my template
veeno(
connect
v-model="getParamsJson.price"
:tooltips="[true, true]"
:handles="getParamsJson.price.handles"
:range = "getParamsJson.price.range"
:step="100"
)
| {{ getParamsJson.price }}
This my data()
getParamsJson = {"date": setDate,
"price": {
"handles" : [2000, 2650],
"range" : { 'min': 1300, 'max': 3250 }
},
}
If you want to have more than one two-way bindings you can use the .sync modifier:
<MyCustomSlider :min-value.sync="currentMinimal" :max-value.sync="currentMaximal" />
export default
{
props:
{
minValue:
{
type: Number,
default: 0
},
maxValue:
{
type: Number,
default: 0
},
},
computed:
{
currentMin:
{
get()
{
return this.minValue;
},
set(val)
{
this.$emit('update:min-value', val);
}
},
currentMax:
{
get()
{
return this.maxValue;
},
set(val)
{
this.$emit('update:max-value', val);
}
},
}
}
Related
I have built a vue component to show a PIE chart in echart library as showed below. The PIE chart will be initialized with a default value.
pieChart.vue
<template>
<div :class="className" :style="{height:height,width:width}" />
</template>
<script>
import echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme
import resize from './mixins/resize'
export default {
mixins: [resize],
props: {
className: {
type: String,
default: 'chart'
},
width: {
type: String,
default: '100%'
},
height: {
type: String,
default: '300px'
},
chartData: {
type: Object,
required: true
}
},
watch: {
chartData: function(val){
console.log('chartdata handler',val);
this.setOptions(val.legend, val.data);
}
},
data() {
return {
chart: null
}
},
mounted() {
this.$nextTick(() => {
this.initChart()
})
},
beforeDestroy() {
if (!this.chart) {
return
}
this.chart.dispose()
this.chart = null
},
methods: {
initChart() {
this.chart = echarts.init(this.$el, 'macarons');
this.setOptions(
['group_a','group_b','group_c'],
[
{ value: 1, name: 'group_a' },
{ value: 2, name: 'group_b' },
{ value: 3, name: 'group_c' },
]
);
},
setOptions( lengend, data ) {
this.chart.setOption({
tooltip: {
trigger: 'item',
formatter: '{a} <br/>{b} : {c} ({d}%)'
},
legend: {
left: 'center',
bottom: '10',
data: lengend
},
series: [
{
name: 'WEEKLY WRITE ARTICLES',
type: 'pie',
roseType: 'radius',
radius: '50%',
data: data,
animationEasing: 'cubicInOut',
animationDuration: 2600
}
]
});
}
}
}
</script>
then I use this component in a view.
<template>
<pie-chart :chartData="updateData"/>
</template>
<script>
export default {
name: 'Personalinforadm',
components: {
PieChart,
},
data() {
return {
updateData: {
data:[
{ value: 33, name: 'group_a' },
{ value: 17, name: 'group_b' },
{ value: 3, name: 'group_c' },
],
legend:['group_a','group_b','group_c']
}
}
},
created() {
this.updateData = {
data:[
{ value: 3, name: 'group_a' },
{ value: 17, name: 'group_b' },
{ value: 3, name: 'group_c' },
],
legend:['group_a','group_b','group_c']
}
}
}
</script>
however the view doesn't update the PIE chart component with the new values in created methods. why the new values doesn't pass to the PIE component and trigger the watch methods, any ideas what goes wrong with the code?
take a look at https://github.com/ecomfe/vue-echarts or solution below may help you.(if you use version >4.x)
sample.vue
<template>
//...
<v-chart
class="chart mt-7"
:option="botChartData"
:update-options="updateOpts"
/>
//...
</template>
<script>
export default {
data() {
return {
updateOpts: {
notMerge: true,
},
botChartData: {
tooltip: {
trigger: "item",
formatter: "{a} <br/>{b} : {c} ({d}%)",
},
series: [
{
name: "Active Bots",
type: "pie",
center: ["50%", "50%"],
radius: ["75%", "90%"],
itemStyle: {
borderRadius: 8,
},
data: [],
}
],
},
};
},
methods: {
connect() {
this.bots = [
{
value: 0,
name: "a",
},
{
value: 1,
name: "b",
},
{
value: 2,
name: "c",
},
];
this.botChartData.series[0].data = this.bots;
}
},
};
</script>
I called "connect" in "created" you can call it in mounted or on events!
if you need to set your chart as a child component you can easily pass this.botChartData like below
child.vue
<template>
<v-chart
class="chart mt-7"
:option="botData"
:update-options="updateConf"
/>
</template>
<script>
export default {
props: {
botChartData: {
type: Object
},
updateOpts: {
type: Object
}
},
computed: {
botData() {
return this.botChartData
},
updateConf() {
return this.updateOpts
}
}
};
</script>
in parent.vue
<template>
//...
<sample :botChartData="botChartData" :updateOpts="updateOpts" />
//...
</template>
<script>
//...the same as sample.vue js
</script>
By the way if you have multiple charts in one page dont forget notMerge then your charts will reinitialize after switching between them
Following is my vuejs code:
export default {
name: 'LineChart',
extends: Line,
props: {
labelFunction: {
type: Function,
required: false,
default: (label) => label,
},
}
computed: {
options() {
return {
scales: {
yAxes: [
{
ticks: {
callback: this.labelFunction,
},
}],
}
}
}
},
}
I want to write the test case for labelFunction. I want to cover it's default value.
How can I do that?
UPDATE: the main issue seems to be that the props only get updated once. They should change when this.campaign.name becomes available.
I want to dynamically update the title and breadcrumb data fields and show them on the page. Currently page page shows undefined or null. How can I fix this?
I tried to create a computed value but it only seems to update once (after head and breadcrumb data is already showed). A method does not work since I don't have anything to trigger the method.
What is the correct way to fix this?
I am using nuxt generate to deploy the app.
export default {
components: { PageHeader },
middleware: 'authenticated',
data() {
return {
title: 'Campaigns' + this.campaignName,
breadcrumb: [
{
text: 'Campaigns',
href: '/'
},
{
text: this.campaignName,
href: '/'
}
],
campaign: ''
}
},
apollo: {
campaign: {
prefetch: true,
query: campaignQuery,
variables() {
return { id: this.$route.params.id }
}
}
},
computed: {
campaignName() {
return this.campaign && this.campaign.name
}
},
head() {
return {
title: this.title
}
}
}
</script>
Your computed property campaignName returns undefined cuz this.campaign.name is not defined
campaignName() {
if(this.campaign && this.campaign.name) return "Campaigns" + this.campaign.name;
return "default value";
}
Then you can use it directly in head
head() {
return {
title: this.campaignName
}
}
The solution was putting the data elements directly as a computer property. (so no recalculation)
export default {
components: { PageHeader },
middleware: 'authenticated',
data() {
return {}
},
apollo: {
campaign: {
prefetch: true,
query: campaignQuery,
variables() {
return { id: this.$route.params.id }
}
}
},
computed: {
title() {
return this.campaign && `Campaign: ${this.campaign.name}`
},
breadcrumb() {
return [
{
text: 'Campaign',
href: '/'
},
{
text: this.campaign && this.campaign.name,
href: '/'
}
]
}
},
head() {
return {
title: this.title
}
}
}
</script>
I'm trying that the percentages in a pie-chart refresh when clicking in a legend to hide data.
So far, I can display the chart with percentages, but they don't change if I hide one of the legends.
This is the chart: initial chart
This is how looks after the click: after click
We expect that instead 55.6%, it shows 100%.
This is my code so far:
<script>
import {Pie} from "vue-chartjs";
import ChartJsPluginDataLabels from 'chartjs-plugin-datalabels';
export default {
extends: Pie,
ChartJsPluginDataLabels,
props: {
data: Array,
bg: Array,
labels: Array
},
data() {
return {
}
},
computed: {
chartData() {
return this.data
},
bgData() {
return this.bg
},
total() {
return this.data.reduce((a, b) => a + (b || 0), 0)
}
},
methods: {
renderPieChart() {
this.renderChart({
labels: this.labels,
datasets: [
{
label: "Data One",
backgroundColor: this.bgData,
data: this.chartData,
hoverBackgroundColor: "#f78733"
}
]
}, {
responsive: true,
plugins: {
datalabels: {
formatter: (value) => {
let sum = this
.$refs.canvas.getContext('2d').dataset._meta[1].total; //use this.total to fix percentages
let percentage = (value * 100 / sum).toFixed(1) + "%";
return percentage;
},
color: '#fff'
}
}
})
console.log()
},
updateSelected(point, event) {
const item = event[0]
this.selected = {
index: item._index,
value: this
.chartData
.datasets[0]
.data[item._index]
}
}
},
watch: {
bg: function () {
this.renderPieChart();
},
data: function () {
this.renderPieChart();
}
},
}
</script>
In order to obtain the expected result, you should define plugins.datalabels.formatter as follows:
formatter: (value, context) => {
return (value * 100 / context.dataset._meta[0].total).toFixed(1) + "%";
}
new Chart(document.getElementById("myChart"), {
type: "pie",
data: {
labels: ['Savings', 'House'],
datasets: [{
label: "Data One",
backgroundColor: ['#4e9258', '#64e986'],
data: [9, 7],
hoverBackgroundColor: "#f78733"
}]
},
options: {
plugins: {
datalabels: {
formatter: (value, context) => {
return (value * 100 / context.dataset._meta[0].total).toFixed(1) + "%";
},
color: '#fff'
}
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.bundle.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels"></script>
<canvas id="myChart" height="100"></canvas>
When component is inside in another component, methods inside, who calculate discount wont work.
productlist(v-slot="{ cellBox, cellType }", view-type="line")
productshort(title="lorem ipsum", instock="12", caption="EVR07.3405", price="6500", oldprice="7900", image="img/demo/1.jpg", :cellclass="cellBox", :cardtype="cellType")
The percentage() method calculates the percentage of discounts, but when the productshort component is inside productlist component, percentage() method does not execute.
<template lang="pug">
div(:class="cellclass")
.product-short(:class="intclass")
.product-short__footer
.product-short__price
span.smart-badge(v-if="oldprice") – {{ finalsell }} ₽
.fill-price(v-if="price")
b {{ price }} ₽
s(v-if="oldprice") {{ oldprice }} ₽
</template>
<script>
export default {
name: 'productshort',
props: {
sellpercent: {
type: Number
},
cellclass: {
type: String,
default: ''
},
cardtype: {
type: String,
default: 'row'
},
intclass: {
type: String
},
price: {
type: Number
},
oldprice: {
type: Number
},
finalsell: {
type: Number
},
},
methods: {
percentage() {
this.finalsell = parseInt(this.oldprice) - parseInt(this.price);
if(this.oldprice) {
this.sellpercent = parseInt(this.finalsell) / parseInt(this.oldprice) * 100;
this.oldprice = parseInt(this.oldprice).toLocaleString('ru-RU')
}
if(this.finalsell) this.finalsell = parseInt(this.finalsell).toLocaleString('ru-RU');
if(this.price) this.price = parseInt(this.price).toLocaleString('ru-RU');
}
},
mounted() {
this.percentage();
}
}
</script>