如何用PyQt5模拟实现网页鼠标移动特效

这篇"如何用PyQt5模拟实现网页鼠标移动特效"文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇"如何用PyQt5模拟实现网页鼠标移动特效"文章吧。

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  # @UnusedImport @UnresolvedImport    getDistance = pointtool.getDistance    findClose = pointtool.findCloseexcept:    import math    def getDistance(p1, p2):        return math.pow(p1.x - p2.x, 2) + math.pow(p1.y - p2.y, 2)    def findClose(points):        plen = len(points)        for i in range(plen):            closest = [None, None, None, None, None]            p1 = points[i]            for j in range(plen):                p2 = points[j]                dte1 = getDistance(p1, p2)                if p1 != p2:                    placed = False                    for k in range(5):                        if not placed:                            if not closest[k]:                                closest[k] = p2                                placed = True                    for k in range(5):                        if not placed:                            if dte1 < getDistance(p1, closest[k]):                                closest[k] = p2                                placed = True            p1.closest = closestclass Target:    def __init__(self, x, y):        self.x = x        self.y = yclass Point(QObject):    valueChanged = pyqtSignal()    def __init__(self, x, ox, y, oy, *args, **kwargs):        super(Point, self).__init__(*args, **kwargs)        self.__x = x        self._x = x        self.originX = ox        self._y = y        self.__y = y        self.originY = oy        # 5个闭合点        self.closest = [0, 0, 0, 0, 0]        # 圆半径        self.radius = 2 + random() * 2        # 连线颜色        self.lineColor = QColor(156, 217, 249)        # 圆颜色        self.circleColor = QColor(156, 217, 249)    def initAnimation(self):        # 属性动画        if not hasattr(self, 'xanimation'):            self.xanimation = QPropertyAnimation(                self, b'x', self, valueChanged=self.valueChanged.emit,                easingCurve=QEasingCurve.InOutSine)            self.yanimation = QPropertyAnimation(                self, b'y', self, valueChanged=self.valueChanged.emit,                easingCurve=QEasingCurve.InOutSine,                finished=self.updateAnimation)            self.updateAnimation()    def updateAnimation(self):        self.xanimation.stop()        self.yanimation.stop()        duration = (1 + random()) * 1000        self.xanimation.setDuration(duration)        self.yanimation.setDuration(duration)        self.xanimation.setStartValue(self.__x)        self.xanimation.setEndValue(self.originX - 50 + random() * 100)        self.yanimation.setStartValue(self.__y)        self.yanimation.setEndValue(self.originY - 50 + random() * 100)        self.xanimation.start()        self.yanimation.start()    @pyqtProperty(float)    def x(self):        return self._x    @x.setter    def x(self, x):        self._x = x    @pyqtProperty(float)    def y(self):        return self._y    @y.setter    def y(self, y):        self._y = yclass Window(QWidget):    def __init__(self, *args, **kwargs):        super(Window, self).__init__(*args, **kwargs)        self.setMouseTracking(True)        self.resize(800, 600)        self.points = []        self.target = Target(self.width() / 2, self.height() / 2)        self.initPoints()    def paintEvent(self, event):        super(Window, self).paintEvent(event)        painter = QPainter()        painter.begin(self)        painter.setRenderHint(QPainter.Antialiasing)        painter.fillRect(self.rect(), Qt.black)        self.animate(painter)        painter.end()    def mouseMoveEvent(self, event):        super(Window, self).mouseMoveEvent(event)        # 鼠标移动时更新xy坐标        self.target.x = event.x()        self.target.y = event.y()        self.update()    def initPoints(self):        t = time()        self.points.clear()        # 创建点        stepX = self.width() / 20        stepY = self.height() / 20        for x in range(0, self.width(), int(stepX)):            for y in range(0, self.height(), int(stepY)):                ox = x + random() * stepX                oy = y + random() * stepY                point = Point(ox, ox, oy, oy)                point.valueChanged.connect(self.update)                self.points.append(point)        print(time() - t)        t = time()        # 每个点寻找5个闭合点        findClose(self.points)        print(time() - t)    def animate(self, painter):        for p in self.points:            # 检测点的范围            value = abs(getDistance(self.target, p))            if value < 4000:                # 其实就是修改颜色透明度                p.lineColor.setAlphaF(0.3)                p.circleColor.setAlphaF(0.6)            elif value < 20000:                p.lineColor.setAlphaF(0.1)                p.circleColor.setAlphaF(0.3)            elif value < 40000:                p.lineColor.setAlphaF(0.02)                p.circleColor.setAlphaF(0.1)            else:                p.lineColor.setAlphaF(0)                p.circleColor.setAlphaF(0)            # 画线条            if p.lineColor.alpha():                for pc in p.closest:                    if not pc:                        continue                    path = QPainterPath()                    path.moveTo(p.x, p.y)                    path.lineTo(pc.x, pc.y)                    painter.save()                    painter.setPen(p.lineColor)                    painter.drawPath(path)                    painter.restore()            # 画圆            painter.save()            painter.setPen(Qt.NoPen)            painter.setBrush(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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