#!/usr/bin/env python # -*- coding: utf-8 -*- """ Created on 2019年3月19日 @author: Irony @site: https://pyqt.site , https://github.com/PyQt5 @email: 892768447@qq.com @file: CircleLine @description: """ from math import floor, pi, cos, sin from random import random, randint from time import time try: from PyQt5.QtCore import QTimer, Qt from PyQt5.QtGui import QColor, QPainter, QPainterPath, QPen from PyQt5.QtWidgets import QWidget, QApplication except ImportError: from PySide2.QtCore import QTimer, Qt from PySide2.QtGui import QColor, QPainter, QPainterPath, QPen from PySide2.QtWidgets import QWidget, QApplication # 最小和最大半径、半径阈值和填充圆的百分比 radMin = 10 radMax = 80 filledCircle = 30 # 填充圆的百分比 concentricCircle = 60 # 同心圆百分比 radThreshold = 25 # IFF special, over this radius concentric, otherwise filled # 最小和最大移动速度 speedMin = 0.3 speedMax = 0.6 # 每个圆和模糊效果的最大透明度 maxOpacity = 0.6 colors = [ QColor(52, 168, 83), QColor(117, 95, 147), QColor(199, 108, 23), QColor(194, 62, 55), QColor(0, 172, 212), QColor(120, 120, 120) ] circleBorder = 10 backgroundLine = colors[0] backgroundColor = QColor(38, 43, 46) backgroundMlt = 0.85 lineBorder = 2.5 # 最重要的是：包含它们的整个圆和数组的数目 maxCircles = 8 points = [] # 实验变量 circleExp = 1 circleExpMax = 1.003 circleExpMin = 0.997 circleExpSp = 0.00004 circlePulse = False # 生成随机整数 a<=x<=b def randint(a, b): return floor(random() * (b - a + 1) + a) # 生成随机小数 def randRange(a, b): return random() * (b - a) + a # 生成接近a的随机小数 def hyperRange(a, b): return random() * random() * random() * (b - a) + a class Circle: def __init__(self, background, width, height): self.background = background self.x = randRange(-width / 2, width / 2) self.y = randRange(-height / 2, height / 2) self.radius = hyperRange(radMin, radMax) self.filled = (False if randint( 0, 100) > concentricCircle else 'full') if self.radius < radThreshold else ( False if randint(0, 100) > concentricCircle else 'concentric') self.color = colors[randint(0, len(colors) - 1)] self.borderColor = colors[randint(0, len(colors) - 1)] self.opacity = 0.05 self.speed = randRange(speedMin, speedMax) # * (radMin / self.radius) self.speedAngle = random() * 2 * pi self.speedx = cos(self.speedAngle) * self.speed self.speedy = sin(self.speedAngle) * self.speed spacex = abs((self.x - (-1 if self.speedx < 0 else 1) * (width / 2 + self.radius)) / self.speedx) spacey = abs((self.y - (-1 if self.speedy < 0 else 1) * (height / 2 + self.radius)) / self.speedy) self.ttl = min(spacex, spacey) class CircleLineWindow(QWidget): def __init__(self, *args, **kwargs): super(CircleLineWindow, self).__init__(*args, **kwargs) # 设置背景颜色 palette = self.palette() palette.setColor(palette.Background, backgroundColor) self.setAutoFillBackground(True) self.setPalette(palette) # 获取屏幕大小 geometry = QApplication.instance().desktop().availableGeometry() self.screenWidth = geometry.width() self.screenHeight = geometry.height() self._canDraw = True self._firstDraw = True self._timer = QTimer(self, timeout=self.update) self.init() def init(self): points.clear() # 链接的最小距离 self.linkDist = min(self.screenWidth, self.screenHeight) / 2.4 # 初始化点 for _ in range(maxCircles * 3): points.append(Circle('', self.screenWidth, self.screenHeight)) self.update() def showEvent(self, event): super(CircleLineWindow, self).showEvent(event) self._canDraw = True def hideEvent(self, event): super(CircleLineWindow, self).hideEvent(event) # 窗口最小化要停止绘制, 减少cpu占用 self._canDraw = False def paintEvent(self, event): super(CircleLineWindow, self).paintEvent(event) if not self._canDraw: return painter = QPainter(self) painter.setRenderHint(QPainter.Antialiasing) painter.setRenderHint(QPainter.SmoothPixmapTransform) self.draw(painter) def draw(self, painter): if circlePulse: if circleExp < circleExpMin or circleExp > circleExpMax: circleExpSp *= -1 circleExp += circleExpSp painter.translate(self.screenWidth / 2, self.screenHeight / 2) if self._firstDraw: t = time() self.renderPoints(painter, points) if self._firstDraw: self._firstDraw = False # 此处有个比例关系用于设置timer的时间，如果初始窗口很小，没有比例会导致动画很快 t = (time() - t) * 1000 * 2 # 比例最大不能超过1920/800 t = int(min(2.4, self.screenHeight / self.height()) * t) - 1 t = t if t > 15 else 15 # 不能小于15s print('start timer(%d msec)' % t) # 开启定时器 self._timer.start(t) def drawCircle(self, painter, circle): # circle.radius *= circleExp if circle.background: circle.radius *= circleExp else: circle.radius /= circleExp radius = circle.radius r = radius * circleExp # 边框颜色设置透明度 c = QColor(circle.borderColor) c.setAlphaF(circle.opacity) painter.save() if circle.filled == 'full': # 设置背景刷 painter.setBrush(c) painter.setPen(Qt.NoPen) else: # 设置画笔 painter.setPen( QPen(c, max(1, circleBorder * (radMin - circle.radius) / (radMin - radMax)))) # 画实心圆或者圆圈 painter.drawEllipse(circle.x - r, circle.y - r, 2 * r, 2 * r) painter.restore() if circle.filled == 'concentric': r = radius / 2 # 画圆圈 painter.save() painter.setBrush(Qt.NoBrush) painter.setPen( QPen(c, max(1, circleBorder * (radMin - circle.radius) / (radMin - radMax)))) painter.drawEllipse(circle.x - r, circle.y - r, 2 * r, 2 * r) painter.restore() circle.x += circle.speedx circle.y += circle.speedy if (circle.opacity < maxOpacity): circle.opacity += 0.01 circle.ttl -= 1 def renderPoints(self, painter, circles): for i, circle in enumerate(circles): if circle.ttl < -20: # 重新初始化一个 circle = Circle('', self.screenWidth, self.screenHeight) circles[i] = circle self.drawCircle(painter, circle) circles_len = len(circles) for i in range(circles_len - 1): for j in range(i + 1, circles_len): deltax = circles[i].x - circles[j].x deltay = circles[i].y - circles[j].y dist = pow(pow(deltax, 2) + pow(deltay, 2), 0.5) # if the circles are overlapping, no laser connecting them if dist <= circles[i].radius + circles[j].radius: continue # otherwise we connect them only if the dist is < linkDist if dist < self.linkDist: xi = (1 if circles[i].x < circles[j].x else - 1) * abs(circles[i].radius * deltax / dist) yi = (1 if circles[i].y < circles[j].y else - 1) * abs(circles[i].radius * deltay / dist) xj = (-1 if circles[i].x < circles[j].x else 1) * \ abs(circles[j].radius * deltax / dist) yj = (-1 if circles[i].y < circles[j].y else 1) * \ abs(circles[j].radius * deltay / dist) path = QPainterPath() path.moveTo(circles[i].x + xi, circles[i].y + yi) path.lineTo(circles[j].x + xj, circles[j].y + yj) # samecolor = circles[i].color == circles[j].color c = QColor(circles[i].borderColor) c.setAlphaF(min(circles[i].opacity, circles[j].opacity) * ((self.linkDist - dist) / self.linkDist)) painter.setPen(QPen(c, ( lineBorder * backgroundMlt if circles[i].background else lineBorder) * ( (self.linkDist - dist) / self.linkDist))) painter.drawPath(path) if __name__ == '__main__': import sys app = QApplication(sys.argv) w = CircleLineWindow() w.resize(800, 600) w.show() sys.exit(app.exec_())