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More Arrowheads: dot, bar (#2486)

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Co-authored-by: Jed Fox <git@jedfox.com>
Co-authored-by: Lipis <lipiridis@gmail.com>
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Steve Ruiz 2020-12-11 17:17:28 +00:00 • committed by GitHub
parent 7c7fb4903b
commit c742225f43
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10 changed files with 550 additions and 70 deletions
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16
src/element/bounds.ts
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@ -212,7 +212,11 @@ export const getArrowheadPoints = (
const nx = (x2 - x1) / distance;
const ny = (y2 - y1) / distance;
const size = 30; // pixels (will differ for each arrowhead)
const size = {
arrow: 30,
bar: 15,
dot: 15,
}[arrowhead]; // pixels (will differ for each arrowhead)
const length = element.points.reduce((total, [cx, cy], idx, points) => {
const [px, py] = idx > 0 ? points[idx - 1] : [0, 0];
@ -226,7 +230,15 @@ export const getArrowheadPoints = (
const xs = x2 - nx * minSize;
const ys = y2 - ny * minSize;
const angle = 20; // degrees
if (arrowhead === "dot") {
const r = Math.hypot(ys - y2, xs - x2);
return [x2, y2, r];
}
const angle = {
arrow: 20,
bar: 90,
}[arrowhead]; // degrees
// Return points
const [x3, y3] = rotate(xs, ys, x2, y2, (-angle * Math.PI) / 180);

2
src/element/types.ts
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@ -98,7 +98,7 @@ export type PointBinding = {
gap: number;
};
export type Arrowhead = "arrow";
export type Arrowhead = "arrow" | "bar" | "dot";
export type ExcalidrawLinearElement = _ExcalidrawElementBase &
Readonly<{