@mapgis/webclient-es6-mapboxgl
Version:
330 lines (298 loc) • 13 kB
JavaScript
import { Common } from '@mapgis/webclient-es6-service';
const { Zondy } = Common;
import {Shape} from './Shape';
import {SmicPolygon} from './SmicPolygon';
import {SUtil} from './SUtil';
/**
* @private
* @class Zondy.LevelRenderer.SmicBrokenLine
* @classdesc 折线(ic)。
* @extends Zondy.LevelRenderer.Shape
* @example
* var shape = new Zondy.LevelRenderer.SmicBrokenLine({
* style: {
* pointList: [[0, 0], [100, 100], [100, 0]],
* smooth: 'bezier',
* strokeColor: 'purple'
* }
* });
* levelRenderer.addShape(shape);
*/
class SmicBrokenLine extends Shape {
/**
* @member {Object} Zondy.LevelRenderer.SmicBrokenLine.prototype.style
* @description 绘制样式。
*
* @param {Array} pointList - 节点数组,二维数组。默认值:null,必设参数。其形式如下:
* (code)
* (start code)
* [
* [10, 20], //单个节点
* [30, 40],
* [25, 30]
* ]
* (end)
* @param {string} smooth - 是否做平滑插值, 平滑算法可以选择 "bezier", "spline"。默认值:"";
* @param {number} smoothConstraint - 平滑约束。
* @param {string} strokeColor - 描边颜色。默认值:"#000000'"。
* @param {string} lineCape - 线帽样式。可设值:"butt", "round", "square"。默认值:"butt"。
* @param {number} lineWidth - 描边宽度。默认值:1。
* @param {number} opacity - 绘制透明度。默认值:1。
* @param {number} shadowBlur - 阴影模糊度,大于0有效。默认值:0。
* @param {number} shadowColor - 阴影颜色。默认值:"#000000'"。
* @param {number} shadowOffsetX - 阴影横向偏移。默认值:0。
* @param {number} shadowOffsetY - 阴影纵向偏移。默认值:0。
* @param {string} text - 图形中的附加文本。默认值:""。
* @param {string} textColor - 文本颜色。默认值:"#000000'"。
* @param {string} textFont - 附加文本样式。示例:'bold 18px verdana'。
* @param {string} textPosition - 附加文本位置。可设值:"inside", "left", "right", top", "bottom", "end"。默认值:"end"。
* @param {string} textAlign - 附加文本水平对齐。可设值:"start", "end", "left", "right", "center"。默认根据 textPosition 自动设置。
* @param {string} textBaseline - 附加文本垂直对齐。可设值:"top", "bottom", "middle", "alphabetic", "hanging", "ideographic"。默认根据 textPosition 自动设置。
*/
/**
* @function Zondy.LevelRenderer.SmicBrokenLine.constructor
* @description 构造函数。
*
* @param {Array} options - shape 的配置(options)项,可以是 shape 的自有属性,也可以是自定义的属性。
*
*/
constructor(options) {
super(options);
/**
* @member {string} Zondy.LevelRenderer.SmicBrokenLine.prototype.brushTypeOnly
* @description 线条只能描边。
*/
this.brushTypeOnly = 'stroke';
/**
* @member {string} Zondy.LevelRenderer.SmicBrokenLine.prototype.textPosition
* @description 文本位置。
*/
this.textPosition = 'end';
/**
* @member {string} Zondy.LevelRenderer.SmicBrokenLine.prototype.type
* @description 图形类型.
*/
this.type = 'smicbroken-line';
if (!this.refOriginalPosition || this.refOriginalPosition.length !== 2) {
this.refOriginalPosition = [0, 0];
}
this.CLASS_NAME = "Zondy.LevelRenderer.Shape.SmicBrokenLine";
}
/**
* @function Zondy.LevelRenderer.SmicBrokenLine.prototype.destroy
* @description 销毁对象,释放资源。调用此函数后所有属性将被置为 null。
*/
destroy() {
this.brushTypeOnly = null;
this.textPosition = null;
this.type = null;
super.destroy();
}
/**
* @function Zondy.LevelRenderer.SmicBrokenLine.prototype.buildPath
* @description 创建折线路径。
*
* @param {CanvasRenderingContext2D} ctx - Context2D 上下文。
* @param {Object} style - style。
*
*/
buildPath(ctx, style) {
if (!this.refOriginalPosition || this.refOriginalPosition.length !== 2) {
this.refOriginalPosition = [0, 0];
}
var __OP = this.refOriginalPosition;
var pointList = style.pointList;
if (pointList.length < 2) {
// 少于2个点就不画了~
return;
}
var len = Math.min(style.pointList.length, Math.round(style.pointListLength || style.pointList.length));
if (style.smooth && style.smooth !== 'spline') {
var controlPoints = SUtil.SUtil_smoothBezier(pointList, style.smooth, false, style.smoothConstraint, __OP);
ctx.moveTo(pointList[0][0] + __OP[0], pointList[0][1] + __OP[1]);
var cp1;
var cp2;
var p;
for (let i = 0; i < len - 1; i++) {
cp1 = controlPoints[i * 2];
cp2 = controlPoints[i * 2 + 1];
p = [pointList[i + 1][0] + __OP[0], pointList[i + 1][1] + __OP[1]];
ctx.bezierCurveTo(
cp1[0], cp1[1], cp2[0], cp2[1], p[0], p[1]
);
}
} else {
if (style.smooth === 'spline') {
pointList = SUtil.SUtil_smoothSpline(pointList, null, null, __OP);
len = pointList.length;
}
if (!style.lineType || style.lineType === 'solid') {
// 默认为实线
ctx.moveTo(pointList[0][0] + __OP[0], pointList[0][1] + __OP[1]);
for (let i = 1; i < len; i++) {
ctx.lineTo(pointList[i][0] + __OP[0], pointList[i][1] + __OP[1]);
}
} else if (style.lineType === 'dashed'
|| style.lineType === 'dotted'
|| style.lineType === 'dot'
|| style.lineType === 'dash'
|| style.lineType === 'longdash'
) {
let dashLength = (style.lineWidth || 1);
let pattern1 = dashLength;
let pattern2 = dashLength;
//dashed
if (style.lineType === 'dashed') {
pattern1 *= 5;
pattern2 *= 5;
if (style.lineCap && style.lineCap !== "butt") {
pattern1 -= dashLength;
pattern2 += dashLength;
}
}
//dotted
if (style.lineType === 'dotted') {
if (style.lineCap && style.lineCap !== "butt") {
pattern1 = 1;
pattern2 += dashLength;
}
}
//dot
if (style.lineType === 'dot') {
pattern2 *= 4;
if (style.lineCap && style.lineCap !== "butt") {
pattern1 = 1;
pattern2 += dashLength;
}
}
//dash
if (style.lineType === 'dash') {
pattern1 *= 4;
pattern2 *= 4;
if (style.lineCap && style.lineCap !== "butt") {
pattern1 -= dashLength;
pattern2 += dashLength;
}
}
//longdash
if (style.lineType === 'longdash') {
pattern1 *= 8;
pattern2 *= 4;
if (style.lineCap && style.lineCap !== "butt") {
pattern1 -= dashLength;
pattern2 += dashLength;
}
}
ctx.moveTo(pointList[0][0] + __OP[0], pointList[0][1] + __OP[1]);
for (var i = 1; i < len; i++) {
SUtil.SUtil_dashedLineTo(
ctx,
pointList[i - 1][0] + __OP[0], pointList[i - 1][1] + __OP[1],
pointList[i][0] + __OP[0], pointList[i][1] + __OP[1],
dashLength,
[pattern1, pattern2]
);
}
} else if (style.lineType === 'dashot'
|| style.lineType === 'longdashdot'
) {
let dashLength = (style.lineWidth || 1);
let pattern1 = dashLength;
let pattern2 = dashLength;
let pattern3 = dashLength;
let pattern4 = dashLength;
//dashot
if (style.lineType === 'dashot') {
pattern1 *= 4;
pattern2 *= 4;
pattern4 *= 4;
if (style.lineCap && style.lineCap !== "butt") {
pattern1 -= dashLength;
pattern2 += dashLength;
pattern3 = 1;
pattern4 += dashLength;
}
}
//longdashdot
if (style.lineType === 'longdashdot') {
pattern1 *= 8;
pattern2 *= 4;
pattern4 *= 4;
if (style.lineCap && style.lineCap !== "butt") {
pattern1 -= dashLength;
pattern2 += dashLength;
pattern3 = 1;
pattern4 += dashLength;
}
}
dashLength = (style.lineWidth || 1)
* (style.lineType === 'dashed' ? 5 : 1);
ctx.moveTo(pointList[0][0] + __OP[0], pointList[0][1] + __OP[1]);
for (let i = 1; i < len; i++) {
SUtil.SUtil_dashedLineTo(
ctx,
pointList[i - 1][0] + __OP[0], pointList[i - 1][1] + __OP[1],
pointList[i][0] + __OP[0], pointList[i][1] + __OP[1],
dashLength,
[pattern1, pattern2, pattern3, pattern4]
);
}
}
}
return;
}
/**
* @function Zondy.LevelRenderer.SmicBrokenLine.prototype.getRect
* @description 计算返回折线包围盒矩形。该包围盒是直接从四个控制点计算,并非最小包围盒。
*
* @param {Object} style - style
* @return {Object} 边框对象。包含属性:x,y,width,height。
*/
getRect(style) {
if (!this.refOriginalPosition || this.refOriginalPosition.length !== 2) {
this.refOriginalPosition = [0, 0];
}
var __OP = this.refOriginalPosition;
return SmicPolygon.prototype.getRect.apply(this, [style, __OP]);
}
/**
* @function Zondy.LevelRenderer.Shape.prototype.brush
* @description 绘制图形。
*
* @param {CanvasRenderingContext2D} ctx - Context2D 上下文。
* @param {boolean} isHighlight - 是否使用高亮属性。
* @param {Function} updateCallback - 需要异步加载资源的 shape 可以通过这个 callback(e),让painter更新视图,base.brush 没用,需要的话重载 brush。
*/
brush(ctx, isHighlight) {
var style = this.beforeBrush(ctx, isHighlight);
ctx.beginPath();
this.buildPath(ctx, style);
switch (style.brushType) {
/* jshint ignore:start */
case 'both':
this.setCtxGlobalAlpha(ctx, "fill", style);
//ctx.fill();
if (style.lineWidth > 0) {
this.setCtxGlobalAlpha(ctx, "stroke", style);
ctx.stroke();
}
this.setCtxGlobalAlpha(ctx, "reset", style);
break;
case 'stroke':
this.setCtxGlobalAlpha(ctx, "stroke", style);
style.lineWidth > 0 && ctx.stroke();
this.setCtxGlobalAlpha(ctx, "reset", style);
break;
/* jshint ignore:end */
default:
this.setCtxGlobalAlpha(ctx, "fill", style);
//ctx.fill();
this.setCtxGlobalAlpha(ctx, "reset", style);
break;
}
this.drawText(ctx, style, this.style);
this.afterBrush(ctx);
}
}
export {SmicBrokenLine};
Zondy.LevelRenderer.SmicBrokenLine = SmicBrokenLine;