SocialNetworks_duan/src/utils/customePaint.js

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//自定义绘制节点的方法
export const paintNodeFunction = function (ctx, onlyShape) {
//默认绘制数据类型图片
if (this.properties.typeIcon) {
if (this.selected || this.showSelected) {
this.drawShape(ctx, onlyShape)
}
if (this.alpha < 1) {
ctx.save()
ctx.globalAlpha = this.alpha
ctx.drawImage(
this.properties.typeIcon,
-this.width / 2,
-this.height / 2,
this.width,
this.height
)
ctx.restore()
} else {
ctx.drawImage(
this.properties.typeIcon,
-this.width / 2,
-this.height / 2,
this.width,
this.height
)
}
} else {
this.drawShape(ctx, onlyShape)
}
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// ctx.beginPath()
// ctx.arc(0, 0, this.radius + 6, 0, Math.PI * 2)
// ctx.lineWidth = 8
// ctx.strokeStyle = `rgba(${this.fillColor},${this.alpha * 0.4})`
// ctx.stroke()
// 半径 & 样式参数(按需调整)
// ===== 三层:实心圆 + 半透明边框 + 外圈虚线 =====
const rFill = this.radius // 实心圆半径
const ringWidth = 15 // 半透明边框的宽度
const ringGap = 0 // 实心与半透明边框之间的间隙(需要留缝就调大)
const outerGap = 0 // 半透明边框与虚线之间的间隙
const dashWidth = 2 // 虚线线宽
const dash = 2,
gap = 4 // 虚线样式
const ringAlphaFactor = 0.5 // 半透明边框的相对透明度(相对于 this.alpha
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// 1) 中间实心圆(填充)
ctx.save()
ctx.beginPath()
ctx.arc(0, 0, rFill, 0, Math.PI * 2)
ctx.fillStyle = `rgba(${this.fillColor}, ${this.alpha})`
ctx.fill()
ctx.restore()
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// 2) 同色半透明边框(描边,不是挖空)
ctx.save()
ctx.beginPath()
const rRing = rFill + ringGap + ringWidth / 2
ctx.arc(0, 0, rRing, 0, Math.PI * 2)
ctx.lineWidth = ringWidth
ctx.setLineDash([]) // 确保这里是实线
ctx.strokeStyle = `rgba(${this.fillColor}, ${this.alpha * ringAlphaFactor})`
ctx.stroke()
ctx.restore()
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// 3) 外圈虚线(同色)
ctx.save()
ctx.beginPath()
const rDash = rRing + ringWidth / 2 + outerGap + dashWidth / 2
ctx.arc(0, 0, rDash, 0, Math.PI * 2)
ctx.lineWidth = dashWidth
ctx.setLineDash([dash, gap])
ctx.lineCap = "round"
ctx.strokeStyle = `rgba(${this.fillColor}, ${this.alpha})`
ctx.stroke()
ctx.setLineDash([]) // 清理,避免影响后续绘制
ctx.restore()
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this.paintText(ctx) //调用内部方法绘制文字
}
//自定义连线的方法
export const paintLineFunction = function (ctx, needHideText) {
this.drawOriginalLine(ctx, needHideText) //内置默认的绘制方法
//指定路径,用于鼠标检测选中
this.path = [
{ x: this.source.cx, y: this.source.cy },
{ x: this.target.cx, y: this.target.cy }
]
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// //绘制路径
ctx.beginPath()
ctx.moveTo(this.source.cx, this.source.cy)
ctx.lineTo(this.target.cx, this.target.cy)
this.setLineStyle(ctx)
ctx.stroke()
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// //绘制连线上文字(内部方法)
this.paintTextOnLineWithAngle(ctx, this.source, this.target)
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}