feat: 字母描红页样式开发基本完成

This commit is contained in:
R524809
2026-04-09 17:43:22 +08:00
parent 653737c481
commit a911da6181
59 changed files with 1043 additions and 206 deletions
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import { PAPER_SIZE } from '../../constants/colors';
import { drawBaseHeader, drawBaseMiniHeader } from './baseHeaderDraw';
/**
* 基础绘制服务
* 包含Paper设置和Header绘制功能,可被所有绘制服务复用
*
* 提供功能:
* - Canvas 初始化和配置
* - Paper 尺寸设置(支持 A4 等标准尺寸)
* - Header 绘制(支持完整 Header 和迷你 Header
* - 分割线绘制
* - 打印配置管理
*/
export class BaseDrawService {
headerType: PrintHeader = 'wechat';
canvas: WechatMiniprogram.Canvas;
ctx: RenderingContext;
options: Record<string, any>;
paperSize: PaperSize;
currentX: number;
currentY: number;
canvasWidth: number; // 逻辑像素宽度
canvasHeight: number; // 逻辑像素高度
constructor(
canvas: Canvas,
ctx: RenderingContext,
options?: Record<string, any>,
) {
options = options || {};
const { appName, appHint } = getApp().getPrintConfig();
this.canvas = canvas;
this.ctx = ctx;
this.paperSize = 'A4';
this.options = {
appName,
appHint,
title: '看数字,涂一涂',
subTitle: '找一找下面相同的数字,涂上颜色',
...options,
};
this.currentX = 0;
this.currentY = 0;
this.canvasWidth = 0;
this.canvasHeight = 0;
this.setPrintConfig();
}
setPrintConfig() {
const printConfig = getApp().getPrintConfig();
this.headerType = printConfig.header;
this.options.appName = printConfig.appName;
}
/**
* 设置Paper(逻辑像素,尺寸除以3)
*/
setPaper() {
const { ctx, canvas } = this;
const { pixelRatio: dpr } = wx.getWindowInfo();
let { width, height } = PAPER_SIZE[this.paperSize];
this.canvasWidth = width;
this.canvasHeight = height;
// 设置 canvas 为物理像素尺寸(用于高分辨率显示)
const physicalWidth = width * dpr;
const physicalHeight = height * dpr;
canvas.width = physicalWidth;
canvas.height = physicalHeight;
// 重置 transform 并 scale 到逻辑像素
ctx.setTransform(1, 0, 0, 1, 0, 0); // 重置 transform
ctx.scale(dpr, dpr); // scale 到逻辑像素,后续绘制都使用逻辑像素
this.clear();
ctx.fillStyle = '#fff';
// 使用逻辑像素尺寸填充
ctx.fillRect(0, 0, this.canvasWidth, this.canvasHeight);
}
/**
* 清除画布
*/
clear() {
const canvas = this.canvas;
this.ctx.clearRect(0, 0, canvas.width, canvas.height);
}
/**
* 绘制Header(逻辑像素,尺寸除以3)
*/
async drawHeader() {
this.currentX = 25;
this.currentY = 25;
await drawBaseHeader({
canvas: this.canvas,
ctx: this.ctx,
headerType: this.headerType,
options: {
appName: this.options.appName || '涂鸦丫小程序',
appHint: this.options.appHint || '识字|识图|练字|打印',
title: this.options.title || '看数字,涂一涂',
subTitle:
this.options.subTitle || '找一找下面相同的数字,涂上颜色',
},
onHeaderDrawn: (currentY) => {
this.currentY = currentY;
},
});
}
/**
* 绘制迷你Header(逻辑像素,尺寸除以3)
*/
drawMiniHeader() {
drawBaseMiniHeader({
ctx: this.ctx,
canvasWidth: this.canvasWidth,
options: {
appName: this.options.appName || '涂鸦丫小程序',
title: this.options.title || '看数字,涂一涂',
},
onHeaderDrawn: (currentY) => {
console.log('drawMiniHeader currentY', currentY);
this.currentY = currentY;
},
});
}
/**
* 绘制分割线(逻辑像素,尺寸除以3)
*/
drawDivider() {
const { ctx, canvasWidth } = this;
const dividerY = this.currentY;
ctx.strokeStyle = '#000';
ctx.lineWidth = 1;
ctx.beginPath();
ctx.moveTo(24, dividerY);
ctx.lineTo(canvasWidth - 24, dividerY);
ctx.stroke();
this.currentY = dividerY + 10; // 分割线下方10px间距
}
/**
* 绘制虚线分割线(逻辑像素,尺寸除以3)
* @param y 分割线的Y坐标
* @param margin 左右边距,默认为40
* @param color 线条颜色,默认为'#999'
* @param lineWidth 线条宽度,默认为1
*/
drawDashedDivider(
y: number,
margin: number = 40,
color: string = '#999',
lineWidth: number = 1,
) {
const { ctx, canvasWidth } = this;
ctx.strokeStyle = color;
ctx.lineWidth = lineWidth;
ctx.setLineDash([4, 4]); // 虚线
ctx.beginPath();
ctx.moveTo(margin, y);
ctx.lineTo(canvasWidth - margin, y);
ctx.stroke();
ctx.setLineDash([]); // 重置为实线
}
/**
* 绘制线条(逻辑像素,尺寸除以3)
* @param x1 起点X坐标
* @param y1 起点Y坐标
* @param x2 终点X坐标
* @param y2 终点Y坐标
* @param options 可选参数
* @param options.isDashed 是否为虚线,默认为true(虚线)
* @param options.dashPattern 虚线模式,默认为[4, 4]
* @param options.color 线条颜色,默认为'#999'
* @param options.lineWidth 线条宽度,默认为1
*/
drawLine(
x1: number,
y1: number,
x2: number,
y2: number,
options?: {
isDashed?: boolean;
dashPattern?: number[];
color?: string;
lineWidth?: number;
},
): void {
const { ctx } = this;
const {
isDashed = true,
dashPattern = [4, 4],
color = '#999',
lineWidth = 1,
} = options || {};
ctx.strokeStyle = color;
ctx.lineWidth = lineWidth;
// 设置虚线或实线
if (isDashed) {
ctx.setLineDash(dashPattern);
} else {
ctx.setLineDash([]);
}
// 绘制线条
ctx.beginPath();
ctx.moveTo(x1, y1);
ctx.lineTo(x2, y2);
ctx.stroke();
// 重置为实线(避免影响后续绘制)
ctx.setLineDash([]);
}
/**
* 绘制网格线(逻辑像素,尺寸除以3)
* @param gridStartX 网格起始X坐标
* @param gridStartY 网格起始Y坐标
* @param cellWidth 每个格子的宽度
* @param cellHeight 每个格子的高度
* @param cols 列数
* @param rows 行数
*/
drawGridLines(
gridStartX: number,
gridStartY: number,
cellWidth: number,
cellHeight: number,
cols: number,
rows: number,
): void {
const { ctx } = this;
// 在函数内部计算网格总宽度和高度
const gridWidth = cellWidth * cols;
const gridHeight = cellHeight * rows;
ctx.strokeStyle = '#000';
ctx.lineWidth = 1;
ctx.setLineDash([]); // 实线
// 绘制垂直线
for (let i = 0; i <= cols; i++) {
const x = gridStartX + i * cellWidth;
ctx.beginPath();
ctx.moveTo(x, gridStartY);
ctx.lineTo(x, gridStartY + gridHeight);
ctx.stroke();
}
// 绘制水平线
for (let i = 0; i <= rows; i++) {
const y = gridStartY + i * cellHeight;
ctx.beginPath();
ctx.moveTo(gridStartX, y);
ctx.lineTo(gridStartX + gridWidth, y);
ctx.stroke();
}
}
/**
* 绘制圆角矩形框(逻辑像素,尺寸除以3)
* @param x 框的X坐标
* @param y 框的Y坐标
* @param width 框的宽度
* @param height 框的高度
* @param options 可选参数
* @param options.isDashed 是否为虚线,默认为false(实线)
* @param options.radius 圆角半径,默认为10
* @param options.color 线条颜色,默认为'#000'
* @param options.lineWidth 线条宽度,默认为1
*/
drawRoundedRect(
x: number,
y: number,
width: number,
height: number,
options?: {
isDashed?: boolean;
radius?: number;
color?: string;
lineWidth?: number;
},
): void {
const { ctx } = this;
const {
isDashed = false,
radius = 10,
color = '#000',
lineWidth = 1,
} = options || {};
ctx.strokeStyle = color;
ctx.lineWidth = lineWidth;
// 设置虚线或实线
if (isDashed) {
ctx.setLineDash([4, 4]); // 虚线
} else {
ctx.setLineDash([]); // 实线
}
// 绘制圆角矩形
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(
x + width,
y + height,
x + width - radius,
y + height,
);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
ctx.stroke();
// 重置为实线(避免影响后续绘制)
ctx.setLineDash([]);
}
/**
* 绘制符号(使用路径绘制)
* @param x 符号中心X坐标
* @param y 符号中心Y坐标
* @param symbol 符号类型:'+', '-', '=', '×', '✓'
* @param size 符号大小
*/
drawSymbol(x: number, y: number, symbol: string, size: number): void {
const { ctx } = this;
ctx.save();
ctx.translate(x, y);
const lineWidth = size * 0.15; // 线条宽度
const halfSize = size / 2;
const strokeLength = halfSize * 0.7; // 线条长度
ctx.strokeStyle = '#000';
ctx.lineWidth = lineWidth;
ctx.lineCap = 'round';
ctx.lineJoin = 'round';
switch (symbol) {
case '+':
// 加号:横线和竖线
ctx.beginPath();
// 横线
ctx.moveTo(-strokeLength, 0);
ctx.lineTo(strokeLength, 0);
// 竖线
ctx.moveTo(0, -strokeLength);
ctx.lineTo(0, strokeLength);
ctx.stroke();
break;
case '-':
// 减号:横线
ctx.beginPath();
ctx.moveTo(-strokeLength, 0);
ctx.lineTo(strokeLength, 0);
ctx.stroke();
break;
case '=':
// 等号:两条横线
const equalsSpacing = size * 0.15; // 两条线之间的间距
ctx.beginPath();
// 上横线
ctx.moveTo(-strokeLength, -equalsSpacing);
ctx.lineTo(strokeLength, -equalsSpacing);
// 下横线
ctx.moveTo(-strokeLength, equalsSpacing);
ctx.lineTo(strokeLength, equalsSpacing);
ctx.stroke();
break;
case '×':
// 乘号:两条斜线
ctx.beginPath();
// 左上到右下
ctx.moveTo(-strokeLength * 0.7, -strokeLength * 0.7);
ctx.lineTo(strokeLength * 0.7, strokeLength * 0.7);
// 右上到左下
ctx.moveTo(strokeLength * 0.7, -strokeLength * 0.7);
ctx.lineTo(-strokeLength * 0.7, strokeLength * 0.7);
ctx.stroke();
break;
case '✓':
// 对号:勾,整体更大,右侧的线更长
const checkScale = 1.2; // 对号整体放大1.2倍
ctx.beginPath();
const checkStartX = -strokeLength * 0.5 * checkScale;
const checkStartY = -strokeLength * 0.2 * checkScale;
const checkMidX = -strokeLength * 0.1 * checkScale;
const checkMidY = strokeLength * 0.3 * checkScale;
const checkEndX = strokeLength * 1.0 * checkScale; // 增加右侧长度
const checkEndY = -strokeLength * 0.4 * checkScale; // 稍微向上调整
ctx.moveTo(checkStartX, checkStartY);
ctx.lineTo(checkMidX, checkMidY);
ctx.lineTo(checkEndX, checkEndY);
ctx.stroke();
break;
default:
// 默认绘制加号
ctx.beginPath();
ctx.moveTo(-strokeLength, 0);
ctx.lineTo(strokeLength, 0);
ctx.moveTo(0, -strokeLength);
ctx.lineTo(0, strokeLength);
ctx.stroke();
}
ctx.restore();
}
/**
* 绘制圆点
* @param ctx 绘制上下文
* @param x 圆点中心X坐标
* @param y 圆点中心Y坐标
* @param radius 圆点半径
* @param fillColor 填充颜色,默认为 '#93D333'
* @param strokeColor 边线颜色,如果传入则绘制边线,宽度为1,默认不绘制
*/
drawDot(
ctx: RenderingContext,
x: number,
y: number,
radius: number,
fillColor?: string,
strokeColor?: string,
) {
ctx.beginPath();
ctx.arc(x, y, radius, 0, Math.PI * 2);
// 绘制填充
ctx.fillStyle = fillColor ?? '#93D333';
ctx.fill();
// 绘制边线(如果提供了边线颜色)
if (strokeColor) {
ctx.strokeStyle = strokeColor;
ctx.lineWidth = 1;
ctx.stroke();
}
}
/**
* 准备绘制(公共初始化逻辑)
* 执行:setPrintConfig -> clear -> setPaper
* 子类可以在调用此方法前后执行自定义逻辑(如数据验证、异步资源加载等)
*/
prepareDraw() {
this.setPrintConfig();
this.clear();
this.setPaper();
}
/**
* 绘制 Header 和 Divider(公共绘制逻辑)
* 根据 headerType 自动选择绘制完整 Header 或迷你 Header,然后绘制分割线
*/
async drawHeaderAndDivider() {
// 绘制Header
if (this.headerType !== 'minimal') {
await this.drawHeader();
} else {
this.drawMiniHeader();
}
// 绘制内容区域分割线
this.drawDivider();
}
/**
* 绘制空白方框(边框1px,#999,无填充,不显示数字)
*/
drawBox(
ctx: RenderingContext,
x: number,
y: number,
width: number,
height: number,
color: string = '#999',
lineWidth: number = 1,
) {
// 绘制方框边框(1px,#999,无填充)
ctx.strokeStyle = color;
ctx.lineWidth = lineWidth;
ctx.setLineDash([]);
ctx.strokeRect(x, y, width, height);
}
/**
* 绘制正方形方框(调用drawBox,减少参数)
* @param ctx 渲染上下文
* @param x 方框左上角x
* @param y 方框左上角y
* @param size 方框边长
* @param color 边框颜色(可选,默认为#999)
* @param lineWidth 线宽(可选,默认为1
*/
drawSquareBox(
ctx: RenderingContext,
x: number,
y: number,
size: number,
color: string = '#999',
lineWidth: number = 1,
) {
this.drawBox(ctx, x, y, size, size, color, lineWidth);
}
}
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import { getMiniCodeImage, getImage } from '../../utils/index';
/**
* 绘制数学模块页眉的参数接口(尺寸除以3)
*/
interface drawBaseHeaderParams {
canvas: WechatMiniprogram.Canvas;
ctx: RenderingContext;
headerType: PrintHeader;
options: {
appName: string;
appHint: string;
title: string;
subTitle: string;
};
onHeaderDrawn?: (currentY: number) => void;
}
/**
* 绘制数学模块完整页眉(尺寸除以3)
*/
export async function drawBaseHeader({
canvas,
ctx,
headerType,
options,
onHeaderDrawn,
}: drawBaseHeaderParams): Promise<void> {
const { appName, appHint, title, subTitle } = options;
let titleX = 108; // 约109.33
const titleY = 25; // 约26.67
const logoX = 24; // 约26.67
const logoY = 20; // 20
const logoWidth = 65; // 约66.67
const logoHeight = 65; // 约66.67
// 根据 headerType 绘制 Logo 或调整标题位置
switch (headerType) {
case 'LogoImage': {
const image = await getImage(
canvas,
'/assets/imgs/doodle-logo.png',
);
ctx.drawImage(image, logoX, logoY, logoWidth, logoHeight);
break;
}
case 'noLogoImage': {
titleX = 40;
break;
}
case 'minimal': {
titleX = 40;
break;
}
default: {
const image = await getMiniCodeImage(canvas);
ctx.drawImage(image, logoX, logoY, logoWidth, logoHeight);
break;
}
}
// 绘制应用名称(字体大小除以3
ctx.font = 'bold 22px "Microsoft Yahei"';
ctx.fillStyle = '#000';
ctx.textAlign = 'left';
ctx.textBaseline = 'top';
ctx.fillText(appName, titleX, titleY);
// 绘制应用提示(字体大小除以3
ctx.font = '16px "Microsoft Yahei"';
ctx.fillStyle = '#666';
ctx.fillText(appHint, titleX, 66);
// 绘制标题(字体大小除以3
ctx.font = 'bold 22px "Microsoft Yahei"';
ctx.fillStyle = '#000';
ctx.fillText(title, 280, titleY);
// 绘制副标题(字体大小除以3
ctx.font = '16px "Microsoft Yahei"';
ctx.fillStyle = '#666';
ctx.fillText(subTitle, 280, 66);
// 调用回调函数
if (onHeaderDrawn) {
onHeaderDrawn(104);
}
}
/**
* 绘制数学模块迷你页眉的参数接口(尺寸除以3)
*/
interface drawBaseMiniHeaderParams {
// canvas: WechatMiniprogram.Canvas;
ctx: RenderingContext;
options: {
appName: string;
title: string;
};
canvasWidth: number; // 逻辑像素宽度(已除以3
onHeaderDrawn?: (currentY: number) => void;
}
/**
* 绘制数学模块迷你页眉(尺寸除以3)
*/
export function drawBaseMiniHeader({
ctx,
options,
canvasWidth,
onHeaderDrawn,
}: drawBaseMiniHeaderParams): void {
const { appName, title } = options;
const titleY = 46;
const centerX = canvasWidth / 2;
// 字体大小除以3
ctx.font = 'bold 24px "Microsoft Yahei"'; // 64/3
ctx.fillStyle = '#000';
ctx.textAlign = 'center';
ctx.fillText(appName + ' ' + title, centerX, titleY);
// 调用回调函数,传递除以3后的currentY
if (onHeaderDrawn) {
onHeaderDrawn(60); // 约66.67
}
}