PyQT6 (9)QGraphicsScene绘制函数图形

加载图片

class SeisPro(QtWidgets.QMainWindow, Ui_SeismicProgramme):
    def __init__(self, parent=None):
        super(SeisPro, self).__init__(parent)
        # 设置窗体
        self.setupUi(self)

        # 输入框默认值设置
        self.time_txt.setPlainText("0")
        self.velocity_txt.setPlainText("0")
        self.distance_txt.setPlainText("0")
        # 绘图控件，创建一个QGraphicsScene
        self.velocity_view.setScene(QGraphicsScene())
        # 按钮
        self.oky_btn.clicked.connect(self.oky_btn_func)
        self.cancel_btn.clicked.connect(self.cancel_btn_fnc)

def oky_btn_func(self):
        self.distance_txt.setPlainText("1")
        self.add_velocitypic()
        self.add_distancepic()
        # self.plt_distancepic()

def add_velocitypic(self):
        frame = QImage("person.jpg")
        pix = QPixmap.fromImage(frame)
        pix = pix.scaled(200, 260)   # 调整图片大小為 200x260
        item = QGraphicsPixmapItem(pix)
        scene = QGraphicsScene()
        # QGraphicsScene 相對位置 (20, 20) 和大小 200x260
        scene.setSceneRect(0, 0, 200, 260)

        scene.addItem(item)
        self.velocity_view.setScene(scene)

绘制函数图

def fnc(self):
        # 1. 创建场景
        scene = QGraphicsScene()

        # 2. 创建元素
        originX,originY = 40,60  #坐标基点
        pen = QtGui.QPen(QtGui.QColor(QtCore.Qt.GlobalColor.red))
        # rectF = QtCore.QRectF(originX+300-8, originY-25, 20, 50)
        # elpItem = scene.addEllipse(rectF, pen)
        # 3. 绘制曲线
        pen.setColor(QtGui.QColor(Qt.GlobalColor.blue))
        path = QtGui.QPainterPath()
        path.moveTo(originX,originY)
        path.cubicTo(originX+100, originY-150, originX+200, originY+150,originX+300,originY)

        myGradient = QtGui.QLinearGradient()
        itemPath = scene.addPath(path,pen,myGradient)
        # 3. 加载内容到场景中
        scene.addItem(itemPath)
        # # 4. 将场景添加至视图
        self.distance_view.setScene(scene)

第15.47节、PyQt显示部件：QGraphicsView图形视图和QGraphicsScene图形场景简介及应用案例_pyqt graphicsview_LaoYuanPython的博客-CSDN博客

专栏：Python基础教程目录专栏：使用PyQt开发图形界面Python应用专栏：PyQt入门学习老猿Python博文目录老猿学5G博文目录一、概述Designer中的Graphics View部件是个图形视图部件，对应类为QGraphicsView，其功能不是简单的显示图形，老猿认为这是一种特殊的视图，它与QGraphicsScene配套实现了类似Model/View的架构。本..._pyqt graphicsview

https://blog.csdn.net/LaoYuanPython/article/details/105822587