// I just copy pasted this code from stackoverflow don't yell at me if there is issues for it export class CanvasProgressBar { private readonly x: number; private readonly y: number; private readonly w: number; private readonly h: number; private readonly color: string; private percentage: number; private p: number; private ctx: CanvasRenderingContext2D; public constructor( ctx: CanvasRenderingContext2D, dimension: { x: number; y: number; width: number; height: number }, color: string, percentage: number ) { ({ x: this.x, y: this.y, width: this.w, height: this.h } = dimension); this.color = color; this.percentage = percentage; this.p; this.ctx = ctx; } draw(): void { // ----------------- this.p = this.percentage * this.w; if (this.p <= this.h) { this.ctx.beginPath(); this.ctx.arc( this.h / 2 + this.x, this.h / 2 + this.y, this.h / 2, Math.PI - Math.acos((this.h - this.p) / this.h), Math.PI + Math.acos((this.h - this.p) / this.h) ); this.ctx.save(); this.ctx.scale(-1, 1); this.ctx.arc( this.h / 2 - this.p - this.x, this.h / 2 + this.y, this.h / 2, Math.PI - Math.acos((this.h - this.p) / this.h), Math.PI + Math.acos((this.h - this.p) / this.h) ); this.ctx.restore(); this.ctx.closePath(); } else { this.ctx.beginPath(); this.ctx.arc(this.h / 2 + this.x, this.h / 2 + this.y, this.h / 2, Math.PI / 2, (3 / 2) * Math.PI); this.ctx.lineTo(this.p - this.h + this.x, 0 + this.y); this.ctx.arc(this.p - this.h / 2 + this.x, this.h / 2 + this.y, this.h / 2, (3 / 2) * Math.PI, Math.PI / 2); this.ctx.lineTo(this.h / 2 + this.x, this.h + this.y); this.ctx.closePath(); } this.ctx.fillStyle = this.color; this.ctx.fill(); } // showWholeProgressBar(){ // this.ctx.beginPath(); // this.ctx.arc(this.h / 2 + this.x, this.h / 2 + this.y, this.h / 2, Math.PI / 2, 3 / 2 * Math.PI); // this.ctx.lineTo(this.w - this.h + this.x, 0 + this.y); // this.ctx.arc(this.w - this.h / 2 + this.x, this.h / 2 + this.y, this.h / 2, 3 / 2 *Math.PI, Math.PI / 2); // this.ctx.lineTo(this.h / 2 + this.x, this.h + this.y); // this.ctx.strokeStyle = '#000000'; // this.ctx.stroke(); // this.ctx.closePath(); // } get PPercentage(): number { return this.percentage * 100; } set PPercentage(x: number) { this.percentage = x / 100; } }