pip install pyqtgraph

import sys
import random
from PySide6.QtWidgets import QApplication, QGraphicsView, QGraphicsScene, QGraphicsItem
from PySide6.QtCore import Qt, QPointF, QRectF, QTimer
from PySide6.QtGui import QPainter, QPen, QColor, QFont
class ScrollableLineGraph(QGraphicsItem):
    def __init__(self, data):
        """
        初始化線圖項，設置初始顯示范圍和數(shù)據(jù)
        :param data: 要顯示的數(shù)據(jù)列表
        """
        super().__init__()
        self.data = data
        self.current_start = 0  # 當前顯示的起始索引
        self.bounding_rect = QRectF(0, 0, 900, 200)  # 線圖的邊界矩形
    def boundingRect(self):
        """
        返回線圖的邊界矩形，用于確定繪制區(qū)域
        :return: 矩形邊界
        """
        return self.bounding_rect
    def paint(self, painter, option, widget):
        """
        繪制線圖，包括坐標軸、刻度和數(shù)據(jù)線
        :param painter: 繪制工具
        :param option: 繪制選項
        :param widget: 關聯(lián)的窗口部件
        """
        painter.setRenderHint(QPainter.Antialiasing)  # 開啟抗鋸齒
        axis_pen = QPen(QColor(255, 255, 255))  # 坐標軸線顏色
        line_pen = QPen(QColor(255, 0, 0))  # 數(shù)據(jù)線顏色
        text_font = QFont()  # 字體設置
        # 繪制x軸
        painter.setPen(axis_pen)
        painter.drawLine(0, 200, 900, 200)
        # 繪制x軸刻度和標簽
        for i in range(0, 20, 1):
            x = (i - self.current_start) * 45
            if 0 <= x < 900:
                painter.drawLine(x, 200, x, 210)
                painter.drawText(x - 5, 220, str(i + self.current_start))
        # 繪制y軸
        painter.drawLine(0, 0, 0, 200)
        # 繪制y軸刻度和標簽
        for i in range(0, 5):
            y = 200 - 45 * i
            painter.drawLine(-5, y, 0, y)
            painter.drawText(-20, y - 5, str(i * 20))  #10：表示Y坐標值間隔大小
        # 繪制y軸刻度和標簽,給每個標簽添加上橫向網格，網格為點狀虛線
        for i in range(0, 5):
            y = 200 - 45 * i
            # 網格為點狀虛線
            painter.setPen(QPen(QColor(128, 128, 128), 0.5, Qt.DashLine))
            # painter.drawLine(-5, y, 0, y)
            # painter.drawText(-20, y - 5, str(i * 10))
            painter.drawLine(0, y, 900, y)
        # 假設已經初始化了painter對象等必要的準備工作
        # 定義一些常量，提高代碼的可讀性
        CANVAS_HEIGHT = 200
        SCALE_FACTOR = 45
        LABEL_OFFSET = -20
        GRID_LINE_WIDTH = 0.5
        GRID_LINE_COLOR = QColor(128, 128, 128)
        GRID_LINE_STYLE = Qt.DashLine
        MAX_LABELS = 10
        # 新增：封裝繪制網格線和刻度標簽的函數(shù)
        def draw_scale_and_grid(painter, y_position, label):
            """
            繪制y軸刻度和標簽以及對應的橫向網格線
            :param painter: QPainter對象，用于繪制
            :param y_position: y軸位置
            :param label: 刻度標簽的文本
            """
            try:
                # 繪制網格線
                painter.setPen(QPen(GRID_LINE_COLOR, GRID_LINE_WIDTH, GRID_LINE_STYLE))
                painter.drawLine(-5, y_position, 0, y_position)
                # 繪制刻度標簽
                painter.drawText(-LABEL_OFFSET, y_position - 5, label)
                # 繪制右側網格線
                painter.drawLine(0, y_position, 900, y_position)
            except Exception as e:
                print(f"Error during drawing scale and grid: {e}")
        # 主繪制邏輯
        try:
            for i in range(MAX_LABELS + 1):  # 由于范圍是從0到10，因此循環(huán)次數(shù)應為MAX_LABELS + 1
                y = CANVAS_HEIGHT - SCALE_FACTOR * i
                # 檢查y位置是否在畫布內，若不在則跳過
                if y < 0:
                    break
                label = str(i * 10)
                # draw_scale_and_grid(painter, y, label)
        except Exception as e:
            print(f"Unexpected error occurred: {e}")
        # 假設在這段代碼的末尾，有適當?shù)馁Y源釋放邏輯，例如painter對象的銷毀等
        # 設置字體
        painter.setFont(text_font)
        # 繪制x軸和y軸標簽
        painter.drawText(900, 205, "Time")
        painter.rotate(-90)
        painter.drawText(-30,10, "Value")
        painter.rotate(90)
        # 繪制數(shù)據(jù)線
        painter.setPen(line_pen)
        painter.setRenderHint(QPainter.SmoothPixmapTransform)
        last_point = QPointF(0, 200 - self.data[self.current_start])
        for i in range(self.current_start, min(self.current_start + 50, len(self.data))):
            x = (i - self.current_start) * 45
            y = 200 - self.data[i]
            painter.drawLine(last_point, QPointF(x, y))
            last_point = QPointF(x, y)

  def GraphWidget_uiInit(self):
    data = []
    scene = QGraphicsScene(self.graphicsView)
    self.graphicsView.setScene(scene)
    self.data_graph = ScrollableLineGraph(data)
    scene.addItem(self.data_graph)
    scene.setBackgroundBrush
    self.graphicsView.setRenderHint(QPainter.Antialiasing)
    self.graphicsView.setFixedSize(960, 240)
    self.graphicsView.setSceneRect(0, 0, 900, 220)
    self.graphicsView.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
    # # 設置定時器，用于動態(tài)更新數(shù)據(jù)
    # self.timer = QTimer(self)
    # self.timer.timeout.connect(self.update_data)
    # self.timer.start(60)  # 每500毫秒觸發(fā)一次
  def update_data(self):
    #隨機數(shù)據(jù)
    # new_data = random.randint(0, 100)
    # self.data_graph.data.append(new_data)
    #將字符串數(shù)據(jù)轉換成int類型的列表數(shù)據(jù)
    dataStr8 = "100 30 178 100 69 60 98 98 79 50 30 20 29 58 69 39 98 29 32"
    list_from_string8 = dataStr8.split()
    number_list8 = list(map(int, list_from_string8))
    self.data_graph.data = number_list8
    self.data_graph.current_start = max(0, len(self.data_graph.data) - 50)
    self.data_graph.update()