Chart.js
Chart.js integration, Bootstrap theming aware. In order to limit the scope of the matestack-ui-bootstrap gem, Chart.js components are not part of this gem. The below shown example should enable you to easily integrate Chart.js by copy&paste (or any other chart library) and optionally adjust according to your needs!
Example and docs below are meant to support Chart.js v2, not Chart.js v3

Ruby component

app/matestack/components/chart_js.rb
class Components::ChartJs < Matestack::Ui::VueJsComponent
vue_name "chart-js-component"
requires :type
requires :datasets
optional :labels
optional :height
optional :width
optional :display_legend
optional :display_x_axes
optional :display_y_axes
optional :cutout_percentage
optional class: { as: :bs_class }
# injected into vue.js components
def vue_props
{}.tap do |props|
props[:type] = context.type
props[:datasets] = context.datasets
props[:labels] = context.labels
props[:display_legend] = !display_legend.nil? ? context.display_legend : false
props[:display_x_axes] = !display_x_axes.nil? ? context.display_x_axes : true
props[:display_y_axes] = !display_y_axes.nil? ? context.display_y_axes : true
props[:display_y_axes] = !display_y_axes.nil? ? context.display_y_axes : true
props[:cutout_percentage] = !context.cutout_percentage.nil? ? context.cutout_percentage : 70
end
end
def response
div class: "chart-container #{context.bs_class}", style: "width: 100%; height: 100%;" do
plain "<canvas matestack-ui-vuejs-ref=#{matestack_ui_vuejs_ref('chart')}></canvas>".html_safe
end
end
end

Vue.js component

If not already installed, do:
yarn add chart.[email protected]2.9.4
Do not forget to import the following file into you application pack
app/matestack/components/chart_js.js
import Chart from 'chart.js';
import MatestackUiVueJs from 'matestack-ui-vuejs'
const chartJsComponent = {
mixins: [MatestackUiVueJs.componentMixin],
template: MatestackUiVueJs.componentHelpers.inlineTemplate,
data() {
return {
chartJsInstance: undefined,
defaultColor: undefined,
fontColor: undefined,
fontFamily: undefined
};
},
methods: {
getThemeColor: function(key){
const style = getComputedStyle(document.body);
return style.getPropertyValue('--bs-'+key);
},
getThemeColorArray: function(keysArray){
let result = []
const style = getComputedStyle(document.body);
keysArray.forEach(function(key){
result.push(style.getPropertyValue('--bs-'+key))
})
return result;
},
drawBarChart: function(chartElement){
const self = this;
this.props["datasets"].forEach(function(item){
if (item["backgroundColor"] === undefined){
item["backgroundColor"] = self.getThemeColor("primary")
}else{
if(Array.isArray(item["backgroundColor"])){
item["backgroundColor"] = self.getThemeColorArray(item["backgroundColor"])
}else{
item["backgroundColor"] = self.getThemeColor(item["backgroundColor"])
}
}
item["hoverBackgroundColor"] = "rgba(0, 0, 0, 0.1)"
if (item["barThickness"] === undefined){
item["barThickness"] = 10;
}
})
this.chartJsInstance = new Chart(chartElement, {
type: 'bar',
data: {
labels: this.props["labels"],
datasets: this.props["datasets"]
},
options: {
legend: {
display: this.props["display_legend"],
},
scales: {
yAxes: [{
display: this.props["display_y_axes"],
gridLines: {
display: false,
},
ticks: {
beginAtZero: true
}
}],
xAxes: [{
display: this.props["display_x_axes"],
gridLines: {
display: false,
},
ticks: {
beginAtZero: true
}
}]
}
}
});
},
drawLineChart: function(chartElement){
const self = this;
this.props["datasets"].forEach(function(item){
if (item["borderColor"] === undefined){
item["borderColor"] = self.getThemeColor("primary")
}else{
item["borderColor"] = self.getThemeColor(item["borderColor"])
}
item["hoverBackgroundColor"] = "rgba(0, 0, 0, 0.1)"
if (item["fill"] === undefined){
item["fill"] = false;
}
})
this.chartJsInstance = new Chart(chartElement, {
type: 'line',
data: {
labels: this.props["labels"],
datasets: this.props["datasets"]
},
options: {
legend: {
display: this.props["display_legend"],
},
scales: {
yAxes: [{
display: this.props["display_y_axes"],
gridLines: {
display: false,
},
ticks: {
beginAtZero: true
}
}],
xAxes: [{
display: this.props["display_x_axes"],
gridLines: {
display: false,
},
ticks: {
beginAtZero: true
}
}]
}
}
});
},
drawDoughnutChart: function(chartElement){
const self = this;
this.props["datasets"].forEach(function(item){
if (item["backgroundColor"] === undefined){
item["backgroundColor"] = self.getThemeColor("primary")
}else{
if(Array.isArray(item["backgroundColor"])){
item["backgroundColor"] = self.getThemeColorArray(item["backgroundColor"])
}else{
item["backgroundColor"] = self.getThemeColor(item["backgroundColor"])
}
}
item["hoverBackgroundColor"] = "rgba(0, 0, 0, 0.1)"
if (item["borderColor"] === undefined){
item["borderColor"] = self.getThemeColor("white")
}else{
item["borderColor"] = self.getThemeColor(item["borderColor"])
}
if (item["hoverBorderColor"] === undefined){
item["hoverBorderColor"] = self.getThemeColor("white")
}else{
item["hoverBorderColor"] = self.getThemeColor(item["hoverBorderColor"])
}
if (item["borderWidth"] === undefined){
item["borderWidth"] = 10
}
if (item["weight"] === undefined){
item["weight"] = 1
}
})
this.chartJsInstance = new Chart(chartElement, {
type: 'doughnut',
data: {
labels: this.props["labels"],
datasets: this.props["datasets"]
},
options: {
legend: {
display: this.props["display_legend"],
},
cutoutPercentage: this.props["cutout_percentage"]
}
});
},
drawPieChart: function(chartElement){
const self = this;
this.props["datasets"].forEach(function(item){
if (item["backgroundColor"] === undefined){
item["backgroundColor"] = self.getThemeColor("primary")
}else{
if(Array.isArray(item["backgroundColor"])){
item["backgroundColor"] = self.getThemeColorArray(item["backgroundColor"])
}else{
item["backgroundColor"] = self.getThemeColor(item["backgroundColor"])
}
}
item["hoverBackgroundColor"] = "rgba(0, 0, 0, 0.1)"
})
this.chartJsInstance = new Chart(chartElement, {
type: 'pie',
data: {
labels: this.props["labels"],
datasets: this.props["datasets"]
},
options: {
legend: {
display: this.props["display_legend"],
}
}
});
},
},
mounted: function() {
const style = getComputedStyle(document.body);
this.defaultColor = style.getPropertyValue('--bs-primary');
this.fontColor = style.getPropertyValue('--bs-secondary');
this.fontFamily = style.getPropertyValue('--bs-font-sans-serif');
Chart.defaults.global.defaultFontColor = this.fontColor
Chart.defaults.global.defaultFontFamily = this.fontFamily
Chart.defaults.global.defaultColor = this.fontFamily
const chartElement = this.$refs.chart
if(this.props["type"] == "bar"){
this.drawBarChart(chartElement);
}
if(this.props["type"] == "line"){
this.drawLineChart(chartElement);
}
if(this.props["type"] == "doughnut"){
this.drawDoughnutChart(chartElement);
}
if(this.props["type"] == "pie"){
this.drawPieChart(chartElement);
}
}
}
export default chartJsComponent
and then in your application.js file:
import chartJsComponent from '../../matestack/components/chart_js.js'// import component definition from source
const appInstance = createApp({})
appInstance.component('chart-js-component', chartJsComponent) // register at appInstance
MatestackUiBootstrap.registerComponents(appInstance)
document.addEventListener('DOMContentLoaded', () => {
MatestackUiVueJs.mount(appInstance)
})

Usage

Example 1: Bar chart

Components::ChartJs.call(class: "w-50", type: :bar, datasets: [
{
label: "€",
data: [x, y, z],
backgroundColor: :primary
},
], labels: ["x", "y", "z"])

Example 2: Doughnut chart

Components::ChartJs.call(type: :doughnut, datasets: [
{
label: "€",
data: [x, y, z],
backgroundColor: [:orange, :secondary, :primary]
},
], labels: ["x", "y", "z"])

Example 3: Line chart

Components::ChartJs.call(type: :line, datasets: [
{
label: "€",
data: [x, y, z],
borderColor: :primary,
pointRadius: 0
},
{
label: "€",
data: [last_7_days, total, last_30_days],
borderColor: :danger,
fill: false
},
], labels: ["x", "y", "z"], display_x_axes: false, display_y_axes: false)

Example 4: Pie chart

Components::ChartJs.call(type: :pie, datasets: [
{
label: "€",
data: [x, y, z],
backgroundColor: [:orange, :secondary, :primary]
},
], labels: ["x", "y", "z"])
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Outline
Ruby component
Vue.js component
Usage
Example 1: Bar chart
Example 2: Doughnut chart
Example 3: Line chart
Example 4: Pie chart