340 lines
10 KiB
JavaScript
340 lines
10 KiB
JavaScript
import { clamp, drawCheckerboardBackground, hslToRgb, hsvToRgb, rgbToHex } from "./utils.js"
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function growBoundingBox(bboxa, bboxb) {
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bboxa.x.min = Math.min(bboxa.x.min, bboxb.x.min);
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bboxa.y.min = Math.min(bboxa.y.min, bboxb.y.min);
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bboxa.x.max = Math.max(bboxa.x.max, bboxb.x.max);
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bboxa.y.max = Math.max(bboxa.y.max, bboxb.y.max);
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}
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class Widget {
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constructor(x, y) {
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this._globalEvents = new Set()
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this.x = x
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this.y = y
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this.scale_x = 1
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this.scale_y = 1
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this.rotation = 0
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this.children = []
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}
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handleMouseEvent(eventType, x, y) {
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for (let child of this.children) {
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// Adjust for translation
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const dx = x - child.x;
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const dy = y - child.y;
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// Apply inverse rotation
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const cosTheta = Math.cos(child.rotation);
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const sinTheta = Math.sin(child.rotation);
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// Rotate coordinates to child's local space
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const rotatedX = dx * cosTheta + dy * sinTheta;
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const rotatedY = -dx * sinTheta + dy * cosTheta;
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// First, perform hit test using original (global) coordinates
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if (child.hitTest(rotatedX, rotatedY) || child._globalEvents.has(eventType)) {
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child.handleMouseEvent(eventType, rotatedX, rotatedY);
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}
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}
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const eventTypes = [
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"mousedown",
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"mousemove",
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"mouseup",
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"dblclick"
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]
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if (eventTypes.indexOf(eventType)!=-1) {
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if (typeof(this[eventType]) == "function") {
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this[eventType](x, y)
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}
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}
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}
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hitTest(x, y) {
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// if ((x >= this.x) && (x <= this.x+this.width) &&
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// (y >= this.y) && (y <= this.y+this.height)) {
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if ((x>=0) && (x <= this.width) && (y >= 0) && (y <= this.height)) {
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return true
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}
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return false
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}
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bbox() {
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let bbox;
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if (this.children.length > 0) {
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if (!bbox) {
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bbox = structuredClone(this.children[0].bbox());
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}
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for (let child of this.children) {
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growBoundingBox(bbox, child.bbox());
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}
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}
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if (bbox == undefined) {
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bbox = { x: { min: 0, max: 0 }, y: { min: 0, max: 0 } };
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}
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bbox.x.max *= this.scale_x;
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bbox.y.max *= this.scale_y;
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bbox.x.min += this.x;
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bbox.x.max += this.x;
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bbox.y.min += this.y;
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bbox.y.max += this.y;
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return bbox;
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}
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draw(ctx) {
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for (let child of this.children) {
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const transform = ctx.getTransform()
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ctx.translate(child.x, child.y)
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ctx.scale(child.scale_x, child.scale_y)
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ctx.rotate(child.rotation)
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child.draw(ctx)
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ctx.setTransform(transform)
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}
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}
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}
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class HueSelectionBar extends Widget {
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constructor(width, height, x, y, colorCvs) {
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super(x, y)
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this.width = width
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this.height = height
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this.colorCvs = colorCvs
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}
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draw(ctx) {
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const [h, s, v] = this.colorCvs.currentHSV
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const hueGradient = ctx.createImageData(this.width, this.height);
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const data = hueGradient.data;
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for (let i = 0; i < data.length; i += 4) {
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const x = ((i / 4) % this.width) / this.width;
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const y = Math.floor(i / 4 / this.height);
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const rgb = hslToRgb(x, 1, 0.5);
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data[i + 0] = rgb.r;
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data[i + 1] = rgb.g;
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data[i + 2] = rgb.b;
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data[i + 3] = 255;
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}
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const transform = ctx.getTransform();
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ctx.putImageData(hueGradient, transform.e, transform.f);
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// draw pointer
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ctx.beginPath();
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ctx.rect(
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h * this.width - 2,
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0,
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4,
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this.height,
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);
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ctx.strokeStyle = "white";
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ctx.stroke();
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}
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updateColorFromMouse(x, y) {
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let [h, s, v] = this.colorCvs.currentHSV
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x = clamp(x / this.width);
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let rgb = hsvToRgb(x, s, v);
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let alpha = this.colorCvs.currentColor.slice(7, 9) || "ff";
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this.colorCvs.currentColor = rgbToHex(rgb.r, rgb.g, rgb.b) + alpha;
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this.colorCvs.currentHSV = [x, s, v]
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this.colorCvs.currentAlpha = alpha
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}
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mousedown(x, y) {
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this._globalEvents.add("mousemove")
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this._globalEvents.add("mouseup")
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this.updateColorFromMouse(x, y)
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this.clicked = true;
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}
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mousemove(x, y) {
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if (this.clicked) {
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this.updateColorFromMouse(x, y)
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}
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}
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mouseup(x, y) {
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this._globalEvents.delete("mousemove")
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this._globalEvents.delete("mouseup")
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this.clicked = false
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}
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}
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class SaturationValueSelectionGradient extends Widget {
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constructor(width, height, x, y, colorCvs) {
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super(x, y)
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this.width = width
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this.height = height
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this.colorCvs = colorCvs
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}
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draw(ctx) {
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let mainGradient = ctx.createImageData(this.width, this.height);
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let data = mainGradient.data;
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// let { h, s, v } = hexToHsv(colorCvs.currentColor);
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let [h, s, v] = this.colorCvs.currentHSV
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for (let i = 0; i < data.length; i += 4) {
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let x = ((i / 4) % this.width) / this.width;
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let y = Math.floor(i / 4 / this.height) / this.height;
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let hue = h;
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let rgb = hsvToRgb(hue, x, 1 - y);
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data[i + 0] = rgb.r;
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data[i + 1] = rgb.g;
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data[i + 2] = rgb.b;
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data[i + 3] = 255;
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}
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const transform = ctx.getTransform();
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ctx.putImageData(mainGradient, transform.e, transform.f);
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// draw pointer
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ctx.beginPath();
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ctx.arc(
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s * this.width,
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(1 - v) * this.height,
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3,
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0,
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2 * Math.PI,
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);
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ctx.strokeStyle = "white";
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ctx.stroke();
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}
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updateColorFromMouse(x, y) {
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const [h, s, v] = this.colorCvs.currentHSV
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const _x = clamp(x / this.width);
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const _y = clamp(y / this.height);
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const rgb = hsvToRgb(h, _x, 1 - _y);
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const alpha = this.colorCvs.currentColor.slice(7, 9) || "ff";
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this.colorCvs.currentColor = rgbToHex(rgb.r, rgb.g, rgb.b) + alpha;
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this.colorCvs.currentHSV = [h, _x, 1 - _y]
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this.colorCvs.currentAlpha = alpha
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}
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mousedown(x, y) {
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this._globalEvents.add("mousemove")
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this._globalEvents.add("mouseup")
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this.updateColorFromMouse(x, y)
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this.clicked = true;
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}
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mousemove(x, y) {
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if (this.clicked) {
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this.updateColorFromMouse(x, y)
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}
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}
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mouseup(x, y) {
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this._globalEvents.delete("mousemove")
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this._globalEvents.delete("mouseup")
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this.clicked = false
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}
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}
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class AlphaSelectionBar extends Widget {
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constructor(width, height, x, y, colorCvs) {
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super(x, y)
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this.width = width
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this.height = height
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this.colorCvs = colorCvs
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}
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draw(ctx) {
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drawCheckerboardBackground(ctx, 0, 0, this.width, this.height, 10);
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// Vertical gradient
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const gradient = ctx.createLinearGradient( 0, 0, 0, this.height);
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gradient.addColorStop(0, `${this.colorCvs.currentColor.slice(0, 7)}ff`); // Full color at the top
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gradient.addColorStop(1, `${this.colorCvs.currentColor.slice(0, 7)}00`);
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ctx.fillStyle = gradient;
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ctx.fillRect(0, 0, this.width, this.height);
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let alpha =
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parseInt(this.colorCvs.currentColor.slice(7, 9) || "ff", 16) / 255;
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// draw pointer
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ctx.beginPath();
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ctx.rect(0, (1 - alpha) * this.height - 2, this.width, 4);
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ctx.strokeStyle = "white";
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ctx.stroke();
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}
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updateColorFromMouse(x, y) {
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y = 1 - y / this.height;
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const alpha = Math.round(clamp(y) * 255).toString(16);
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this.colorCvs.currentColor = `${this.colorCvs.currentColor.slice(0, 7)}${alpha}`;
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this.colorCvs.currentAlpha = alpha
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}
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mousedown(x, y) {
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this._globalEvents.add("mousemove")
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this._globalEvents.add("mouseup")
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this.updateColorFromMouse(x, y)
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this.clicked = true;
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}
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mousemove(x, y) {
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if (this.clicked) {
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this.updateColorFromMouse(x, y)
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}
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}
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mouseup(x, y) {
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this._globalEvents.delete("mousemove")
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this._globalEvents.delete("mouseup")
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this.clicked = false
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}
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}
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class ColorWidget extends Widget {
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constructor(width, height, x, y, colorCvs) {
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super(x, y)
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this.width = width
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this.height = height
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this.colorCvs = colorCvs
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}
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draw(ctx) {
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drawCheckerboardBackground(ctx, 0, 0, this.width, this.height, 10);
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ctx.fillStyle = this.colorCvs.currentColor;
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ctx.fillRect(0, 0, this.width, this.height);
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}
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}
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class ColorSelectorWidget extends Widget {
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constructor(x, y, colorCvs) {
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super(x, y)
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this.colorCvs = colorCvs
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const padding = 10;
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const gradwidth = 25;
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const ccwidth = 300;
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const mainSize = ccwidth - (3 * padding + gradwidth);
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this.children = [
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new ColorWidget(
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colorCvs.width - 2 * padding,
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50,
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padding,
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padding,
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colorCvs
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),
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new HueSelectionBar(
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mainSize,
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gradwidth,
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padding,
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3 * padding + 50 + mainSize, colorCvs
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),
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new SaturationValueSelectionGradient(
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mainSize,
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mainSize,
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padding,
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2 * padding + 50,
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colorCvs
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),
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new AlphaSelectionBar(
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gradwidth,
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mainSize,
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colorCvs.width - (padding + gradwidth),
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2 * padding + 50,
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colorCvs
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)
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]
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}
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draw(ctx) {
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const darkMode =
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window.matchMedia &&
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window.matchMedia("(prefers-color-scheme: dark)").matches;
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ctx.lineWidth = 2;
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if (darkMode) {
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ctx.fillStyle = "#333";
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} else {
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ctx.fillStyle = "#ccc"; //TODO
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}
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ctx.fillRect(0, 0, this.colorCvs.width, this.colorCvs.height);
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super.draw(ctx)
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}
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}
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export {
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Widget,
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HueSelectionBar,
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SaturationValueSelectionGradient,
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AlphaSelectionBar,
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ColorWidget,
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ColorSelectorWidget
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}; |