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import { CanvasRenderingContext2D } from 'canvas';
/**
* I just copy pasted this code from stackoverflow don't yell at me if there is issues for it
* @author @TymanWasTaken
*/
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 = undefined;
this.ctx = ctx;
}
public 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();
}
// public 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();
// }
public get PPercentage(): number {
return this.percentage * 100;
}
public set PPercentage(x: number) {
this.percentage = x / 100;
}
}
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