利用PyQt5模拟实现网页鼠标移动特效

核心代码：

from random import randomfrom time import timefrom pyqt5.qtcore import qpropertyanimation, qobject, pyqtproperty, qeasingcurve,\    qt, qrectf, pyqtsignalfrom pyqt5.qtgui import qcolor, qpainterpath, qpainterfrom pyqt5.qtwidgets import qwidget__author__ = """by: ironyqq: 892768447email: 892768447@qq.com"""__copyright__ = 'copyright (c) 2018 irony'__version__ = 1.0try:    import pointtool  # @unudimport @unresolvedimport    getdistance = pointtool.getdistance    findclo = pointtool.findcloe三八妇女节活动通知xcept:    import math    def getdistance(p1, p2):        return mat我是舞蹈家h.pow(p1.x - p2.x, 2) + math.pow(p1.y - p2.y, 2)    def findclo(points):        plen = len(points)        for i in range(plen):            clost = [none, none, none, none, none]            p1 = points[i]            for j in range(plen):                p2 = points[j]                dte1 = getdistance(p1, p2)                if p1 != p2:                    placed = fal                    for k in range(5):                        if not placed:                            if not clost[k]:                                clost[k] = p2                                placed = true                    for k in range(5):                        if not placed:                            if dte1 < getd压力方向istance(p1, clost[k]):                                clost[k] = p2                                placed = true            p1.clost = clostclass target:    def __init__(lf, x, y):        lf.x = x        lf.y = yclass point(qobject):    valuechanged = pyqtsignal()    def __init__(lf, x, ox, y, oy, *args, **kwargs):        super(point, lf).__init__(*args, **kwargs)        lf.__x = x        lf._x = x        lf.originx = ox        lf._y = y        lf.__y = y        lf.originy = oy        # 5个闭合点        lf.clost = [0, 0, 0, 0, 0]        # 圆半径        lf.radius = 2 + random() * 2        # 连线颜色        lf.linecolor = qcolor(156, 217, 249)        # 圆颜色        lf.circlecolor = qcolor(156, 217, 249)    def initanimation(lf):        # 属性动画        if not hasattr(lf, 'xanimation'):            lf.xanimation = qpropertyanimation(                lf, b'x', lf, valuechanged=lf.valuechanged.emit,                easingcurve=qeasingcurve.inoutsine)            lf.yanimation = qpropertyanimation(                lf, b'y', lf, valuechanged=lf.valuechanged.emit,                easingcurve=qeasingcurve.inoutsine,                finished=lf.updateanimation)            lf.updateanimation()    def updateanimation(lf):        lf.xanimation.stop()        lf.yanimation.stop()        duration = (1 + random()) * 1000        lf.xanimation.tduration(duration)        lf.yanimation.tduration(duration)        lf.xanimation.tstartvalue(lf.__x)        lf.xanimation.tendvalue(lf.originx - 50 + random() * 100)        lf.yanimation.tstartvalue(lf.__y)        lf.yanimation.tendvalue(lf.originy - 50 + random() * 100)        lf.xanimation.start()        lf.yanimation.start()    @pyqtproperty(float)    def x(lf):        return lf._x    @x.tter    def x(lf, x):        lf._x = x    @pyqtproperty(float)    def y(lf):        return lf._y    @y.tter    def y(lf, y):        lf._y = yclass window(qwidget):    def __init__(lf, *args, **kwargs):        super(window, lf).__init__(*args, **kwargs)        lf.tmoutracking(true)        lf.resize(800, 600)        lf.points = []        lf.target = target(lf.width() / 2, lf.height() / 2)        lf.initpoints()    def paintevent(lf, event):        super(window, lf).paintevent(event)        painter = qpainter()        painter.begin(lf)        painter.trenderhint(qpainter.antialiasing)        painter.fillrect(lf.rect(), qt.black)        lf.animate(painter)        painter.end()    def moumoveevent(lf, event):        super(window, lf).moumoveevent(event)        # 鼠标移动时更新xy坐标        lf.target.x = event.x()        lf.target.y = event.y()        lf.update()    def initpoints(lf):        t = time()        lf.points.clear()        # 创建点        stepx = lf.width() / 20        stepy = lf.height() / 20        for x in range(0, lf.width(), int(stepx)):            for y in range(0, lf.height(), int(stepy)):                ox = x + random() * stepx                oy = y + random() * stepy                point = point(ox, ox, oy, oy)                point.valuechanged.connect(lf.update)                lf.points.append(point)        print(time() - t)        t = time()        # 每个点寻找5个闭合点   二年级下册     findclo(lf.points)        print(time() - t)    def animate(lf, painter):        for p in lf.points:            # 检测点的范围            value = abs(getdistance(lf.target, p))            if value < 4000:                # 其实就是修改颜色透明度                p.linecolor.talphaf(0.3)                p.circlecolor.talphaf(0.6)            elif value < 20000:                p.linecolor.talphaf(0.1)                p.circlecolor.talphaf(0.3)            elif value < 40000:                p.linecolor.talphaf(0.02)                p.circlecolor.talphaf(0.1)            el:                p.linecolor.talphaf(0)                p.circlecolor.talphaf(0)            # 画线条            if p.linecolor.alpha():                for pc in p.clost:                    if not pc:                        continue                    path = qpainterpath()                    path.moveto(p.x, p.y)                    path.lineto(pc.x, pc.y)                    painter.save()                    painter.tpen(p.linecolor)                    painter.drawpath(path)                    painter.restore()            # 画圆            painter.save()            painter.tpen(qt.nopen)            painter.t摘抄文章brush(p.circlecolor)            painter.drawroundedrect(qrectf(                p.x - p.radius, p.y - p.radius, 2 * p.radius, 2 * p.radius), p.radius, p.radius)            painter.restore()            # 开启动画            p.initanimation()if __name__ == '__main__':    import sys    import cgitb    sys.excepthook = cgitb.enable(1, none, 5, '')    from pyqt5.qtwidgets import qapplication    app = qapplication(sys.argv)    w = window()    w.show()    sys.exit(app.exec_())

运行结果如下：

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