bd028579
 易尊强
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/**
* 矩形
* @module zrender/graphic/shape/Rect
*/
import Path, { PathProps } from '../Path';
import * as roundRectHelper from '../helper/roundRect';
import {subPixelOptimizeRect} from '../helper/subPixelOptimize';
export class RectShape {
// 左上、右上、右下、左下角的半径依次为r1、r2、r3、r4
// r缩写为1 相当于 [1, 1, 1, 1]
// r缩写为[1] 相当于 [1, 1, 1, 1]
// r缩写为[1, 2] 相当于 [1, 2, 1, 2]
// r缩写为[1, 2, 3] 相当于 [1, 2, 3, 2]
r?: number | number[]
x = 0
y = 0
width = 0
height = 0
}
export interface RectProps extends PathProps {
shape?: Partial<RectShape>
}
// Avoid create repeatly.
const subPixelOptimizeOutputShape = {};
class Rect extends Path<RectProps> {
shape: RectShape
constructor(opts?: RectProps) {
super(opts);
}
getDefaultShape() {
return new RectShape();
}
buildPath(ctx: CanvasRenderingContext2D, shape: RectShape) {
let x: number;
let y: number;
let width: number;
let height: number;
if (this.subPixelOptimize) {
const optimizedShape = subPixelOptimizeRect(subPixelOptimizeOutputShape, shape, this.style);
x = optimizedShape.x;
y = optimizedShape.y;
width = optimizedShape.width;
height = optimizedShape.height;
optimizedShape.r = shape.r;
shape = optimizedShape;
}
else {
x = shape.x;
y = shape.y;
width = shape.width;
height = shape.height;
}
if (!shape.r) {
ctx.rect(x, y, width, height);
}
else {
roundRectHelper.buildPath(ctx, shape);
}
}
isZeroArea() {
return !this.shape.width || !this.shape.height;
}
}
Rect.prototype.type = 'rect';
export default Rect;
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