QGraphicsView 案例-QT开发中文网

以下是一个使用QGraphicsView的简单案例，用于显示多个图形：

from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *


class GraphicsScene(QGraphicsScene):
    def __init__(self, parent=None):
        super().__init__(parent)

        # 添加圆形
        ellipse1 = self.addEllipse(0, 0, 50, 50)
        ellipse1.setBrush(QBrush(Qt.red))
        ellipse2 = self.addEllipse(50, 50, 50, 50)
        ellipse2.setBrush(QBrush(Qt.green))
        ellipse3 = self.addEllipse(100, 100, 50, 50)
        ellipse3.setBrush(QBrush(Qt.blue))


class GraphicsView(QGraphicsView):
    def __init__(self, parent=None):
        super().__init__(parent)

        # 设置scene和viewport
        self.setScene(GraphicsScene())
        self.setRenderHint(QPainter.Antialiasing)
        self.setViewportUpdateMode(QGraphicsView.FullViewportUpdate)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)

        # 添加QGraphicsView
        view = GraphicsView()
        self.setCentralWidget(view)
        self.setWindowTitle('Graphics View Example')


if __name__ == '__main__':
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()

运行此代码将显示一个窗口，其中包含三个不同颜色的圆。可以通过拖动鼠标来移动视图并缩放视图。