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2025-01-19 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >
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Most people do not understand the knowledge points of this article "how to use PyQt5 to simulate the mobile effects of web mouse", so the editor summarizes the following contents, detailed contents, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "how to use PyQt5 to simulate the mobile effects of web mouse" article.
Core code:
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] 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:The above is about the content of this article on "how to use PyQt5 to simulate the special effects of web mouse movement". I believe we all have a certain understanding. I hope the content shared by the editor will be helpful to you. If you want to know more related knowledge, please pay attention to the industry information channel.
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