[IMP] awesome_dashboard: Add pie chart

Author: baje-odoo

awesome_dashboard/static/src/dashboard.js

@@ -5,10 +5,11 @@ import { registry } from "@web/core/registry";
 import { Layout } from "@web/search/layout";
 import { useService } from "@web/core/utils/hooks";
 import { DashboardItem } from "./dashboard_item";
+import { PieChart } from "./pie_chart";
 
 class AwesomeDashboard extends Component {
     static template = "awesome_dashboard.AwesomeDashboard";
-    static components = { Layout, DashboardItem };
+    static components = { Layout, DashboardItem, PieChart };
 
     setup(){
         this.action = useService("action");

awesome_dashboard/static/src/dashboard.xml

@@ -38,6 +38,10 @@
                         <t t-esc="statistics.total_amount"/>
                     </div>
                 </DashboardItem>
+                <DashboardItem size="2">
+                    Shirt orders by size
+                    <PieChart data="statistics['orders_by_size']" label="'Shirt orders by size'"/>
+                </DashboardItem>
             </div>
         </Layout>
     </t>

awesome_dashboard/static/src/pie_chart.js

@@ -0,0 +1,41 @@
+import { loadJS } from "@web/core/assets";
+import { getColor } from "@web/core/colors/colors";
+import { Component, onWillStart, onWillUnmount, onMounted, useRef } from "@odoo/owl";
+
+export class PieChart extends Component {
+    static template = "awesome_dashboard.PieChart";
+    static props = {
+        label: { type: String, optional: true },
+        data: { type: Object, optional: true },
+    };
+
+    setup(){
+        this.canvasRef = useRef("canvas");
+        onWillStart (() => loadJS("/web/static/lib/Chart/Chart.js"));
+        onMounted(() => {
+            this.renderChart();
+        });
+        onWillUnmount(() => {
+            this.chart.destroy();
+        });
+    };
+
+    renderChart(){
+        const labels = Object.keys(this.props.data);
+        const data = Object.values(this.props.data);
+        const color = labels.map((_, index) => getColor(index));
+        this.chart = new Chart(this.canvasRef.el, {
+            type: "pie",
+            data: {
+                labels: labels,
+                datasets: [
+                    {
+                        data: data,
+                        backgroundColor: color,
+                    },
+                ],
+            },
+        });
+    }
+}
+

awesome_dashboard/static/src/pie_chart.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<templates xml:space="preserve">
+    <t t-name="awesome_dashboard.PieChart">
+        <div t-att-class="'h-100' + props.class" t-ref="root">
+            <div class="h-100 posiion-relative" t-ref="container">
+                <canvas t-ref="canvas"/>
+            </div>
+        </div>
+    </t>
+</templates>