介绍

• 使用pyqt绘制一个爱心！

效果

代码

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget
from PyQt5.QtGui import QPainter, QPen, QBrush, QColor
from PyQt5.QtCore import Qt, QPointF
import numpy as npclass HeartWidget(QWidget):def __init__(self):super().__init__()self.setWindowTitle('Heart Shape with PyQt5')self.setGeometry(100, 100, 800, 600)def paintEvent(self, event):painter = QPainter(self)painter.setRenderHint(QPainter.Antialiasing)# Generate heart shape coordinatest = np.linspace(0, 2 * np.pi, 1000)x = 16 * np.sin(t)**3y = -(13 * np.cos(t) - 5 * np.cos(2 * t) - 2 * np.cos(3 * t) - np.cos(4 * t))# Normalize coordinatesx = (x - min(x)) / (max(x) - min(x)) * self.width()y = (y - min(y)) / (max(y) - min(y)) * self.height()# Set gradient colorscolors = [QColor.fromHsvF(i / len(t), 1.0, 1.0) for i in range(len(t))]# Draw heart shapefor i in range(len(t) - 1):painter.setPen(QPen(colors[i], 2))painter.drawLine(QPointF(x[i], y[i]), QPointF(x[i + 1], y[i + 1]))# Fill heart shape with gradient colorspainter.setPen(Qt.NoPen)painter.setBrush(QBrush(Qt.SolidPattern))for i in range(len(t) - 1):painter.setBrush(QBrush(colors[i]))painter.drawPolygon(QPointF(x[i], y[i]), QPointF(x[i + 1], y[i + 1]), QPointF(self.width() / 2, self.height() / 2))class MainWindow(QMainWindow):def __init__(self):super().__init__()self.setWindowTitle('Heart Shape with PyQt5')self.setGeometry(100, 100, 800, 600)self.setCentralWidget(HeartWidget())if __name__ == '__main__':app = QApplication(sys.argv)window = MainWindow()window.show()sys.exit(app.exec_())