294 lines
8.8 KiB
TypeScript
294 lines
8.8 KiB
TypeScript
import { SHAPES, ShapeCard } from '../../constants/shapes';
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import { WATER_COLORS, PAPER_SIZE } from '../../constants/colors';
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import ShapeDrawService from '../../service/shapeDrawService';
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import { checkAndSaveImage } from '../../utils/saveImage';
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Page({
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canvas: null as Canvas | null,
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ctx: null as RenderingContext | null,
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boxHeight: 0,
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boxWidth: 0,
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shapeDrawService: null as ShapeDrawService | null,
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data: {
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shapeList: [] as ShapeCard[],
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showSelectShapePopup: false,
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currentShapeId: '',
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showColorPopup: false,
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currentIndex: 0,
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currentColor: '',
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isPCDevtool: false,
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},
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onLoad() {
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// 判断是否在PC端开发工具上运行
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// const systemInfo = wx.getDeviceInfo();
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// if (systemInfo.platform === 'devtools') {
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// this.setData({
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// isPCDevtool: true,
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// });
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// }
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this.refreshShapeCard();
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},
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onReady() {
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const query = wx.createSelectorQuery();
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query
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.select('#canvasWrapper')
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.boundingClientRect((rect) => {
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if (rect) {
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const { width, height } = PAPER_SIZE['A4'];
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const boxWidth = rect.width;
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const boxHeight = boxWidth / (width / height);
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this.boxHeight = boxHeight;
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this.boxWidth = boxWidth;
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this.initCanvas(boxWidth, boxHeight);
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}
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})
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.exec();
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},
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initCanvas(boxWidth: number, boxHeight: number) {
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wx.createSelectorQuery()
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.select('#canvasContent')
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.fields({
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node: true,
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size: true,
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})
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.exec((res) => {
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if (res[0] && res[0].node) {
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const canvas = res[0].node;
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const ctx = canvas.getContext('2d');
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if (ctx) {
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this.canvas = canvas;
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this.ctx = ctx;
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// const rect = res[0];
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this.shapeDrawService = new ShapeDrawService(canvas, ctx);
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// shapeDrawService.draw();
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this.setData({ boxWidth, boxHeight });
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this.drawCanvas();
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}
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}
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});
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},
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/** 变更shapeList 并更新canvas */
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drawCanvas(
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updatedShapeList?: ShapeCard[],
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callback: () => void = () => { },
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) {
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if (updatedShapeList) {
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this.setData({ shapeList: updatedShapeList }, () => {
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this.shapeDrawService?.draw(updatedShapeList!);
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callback();
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});
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} else {
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const shapeList = this.data.shapeList;
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this.shapeDrawService?.draw(shapeList);
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}
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},
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openSelectShapePopup(e: any) {
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const { key } = e.detail;
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this.setData({
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showSelectShapePopup: true,
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currentShapeId: key
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});
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},
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closeSelectShapePopup() {
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this.setData({
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showSelectShapePopup: false,
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currentShapeId: ''
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});
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},
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onChangeShape(e: any) {
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const { shapes } = e.detail;
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const prevShapeList: ShapeCard[] = this.data.shapeList || [];
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// 1. 保留已选图形的 fillColor，不变
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// 2. 新增的图形分配未被占用的颜色，且不重复
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// 获取所有可用颜色
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const colorList = WATER_COLORS.basic12.map(item => item.hex);
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// 记录已被使用的颜色（只考虑当前 shapeList 中的 fillColor）
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const usedColors = prevShapeList.map(item => item.fillColor).filter(Boolean);
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// 新的 shapeList
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const newShapeList: ShapeCard[] = [];
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// 记录已分配的颜色，避免重复
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const assignedColors = [...usedColors];
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// 先将 shapes 转为 Map，方便查找
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const prevShapeMap = new Map(prevShapeList.map(item => [item.id, item]));
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// 随机打乱剩余可用颜色
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function shuffle(arr: string[]) {
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for (let i = arr.length - 1; i > 0; i--) {
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const j = Math.floor(Math.random() * (i + 1));
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[arr[i], arr[j]] = [arr[j], arr[i]];
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}
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return arr;
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}
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// 计算未被占用的颜色
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let availableColors = colorList.filter(color => !assignedColors.includes(color));
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availableColors = shuffle(availableColors);
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shapes.forEach((item: ShapeCard) => {
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if (prevShapeMap.has(item.id)) {
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// 已存在，保留原有 fillColor
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newShapeList.push({
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...item,
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fillColor: prevShapeMap.get(item.id)!.fillColor
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});
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} else {
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// 新增，分配未被占用的颜色
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const color = availableColors.shift() || colorList[0];
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assignedColors.push(color);
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newShapeList.push({
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...item,
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fillColor: color
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});
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}
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});
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this.setData({
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showSelectShapePopup: false,
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currentShapeId: '',
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shapeList: newShapeList
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}, () => {
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// 绘制canvas
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this.drawCanvas();
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});
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},
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/**
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* 随机生成6个图形
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*/
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refreshShapeCard() {
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// 随机取6个图形
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const shapesCopy = [...SHAPES];
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for (let i = shapesCopy.length - 1; i > 0; i--) {
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const j = Math.floor(Math.random() * (i + 1));
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[shapesCopy[i], shapesCopy[j]] = [shapesCopy[j], shapesCopy[i]];
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}
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const selectedShapes = shapesCopy.slice(0, 6);
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// 随机取6个颜色
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const colorList = WATER_COLORS.basic12.map(item => item.hex);
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const colorsCopy = [...colorList];
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for (let i = colorsCopy.length - 1; i > 0; i--) {
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const j = Math.floor(Math.random() * (i + 1));
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[colorsCopy[i], colorsCopy[j]] = [colorsCopy[j], colorsCopy[i]];
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}
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const selectedColors = colorsCopy.slice(0, 6);
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// 分配颜色到图形
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const shapeList = selectedShapes.map((shape, idx) => ({
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...shape,
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fillColor: selectedColors[idx]
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}));
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// 更新数据
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this.setData({
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shapeList
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}, () => {
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// 绘制canvas
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this.drawCanvas();
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});
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},
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onDelete(e: any) {
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const { index } = e.detail;
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const newShapeList = this.data.shapeList.filter((item, i) => i !== index);
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this.setData({
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shapeList: newShapeList
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}, () => {
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// 绘制canvas
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this.drawCanvas();
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});
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},
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onColorTap(e: any) {
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const { index, fillColor } = e.detail;
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console.log('shape Page onColorTap', index, fillColor);
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this.setData({
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showColorPopup: true,
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currentColor: fillColor,
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currentIndex: index
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});
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},
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onCloseColorPopup() {
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this.setData({
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showColorPopup: false,
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currentColor: '',
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currentIndex: 0
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});
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},
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onChangeColor(e: any) {
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const { color } = e.detail;
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const { currentIndex } = this.data;
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this.setData({
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showColorPopup: false,
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[`shapeList[${currentIndex}].fillColor`]: color
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}, () => {
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// 绘制canvas
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this.drawCanvas();
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})
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},
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// 测试ShapeDrawService
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// testShapeDrawService() {
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// if (!this.shapeDrawService) {
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// wx.showToast({
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// title: 'Canvas未初始化',
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// icon: 'none'
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// });
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// return;
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// }
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// // 使用当前选中的图形进行测试
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// const testShapes = this.data.shapeList.slice(0, 3); // 只测试前3个图形
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// if (testShapes.length === 0) {
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// wx.showToast({
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// title: '请先选择图形',
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// icon: 'none'
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// });
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// return;
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// }
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// this.shapeDrawService.draw(testShapes);
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// wx.showToast({
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// title: '绘制完成',
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// icon: 'success'
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// });
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// },
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onShareAppMessage() {
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return {
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title: '涂鸦丫-涂色|识字|画画|打印',
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path: '/pages/index/index',
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};
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},
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onShareTimeline() {
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return {
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title: '涂鸦丫-涂色|识字|画画|打印',
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query: '/pages/index/index',
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};
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},
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/** 下载打印 */
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exportToPrint() {
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if (this.canvas && this.data.shapeList.length > 0) {
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checkAndSaveImage(this.canvas);
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return;
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}
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},
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});
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