温度记录示例

示例显示如何创建带负条的条形图。

对于我们的示例，我们使用温度数据。

下载 此示例

temperaturerecords.py

# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

"""PySide6 port of the Temperature Records example from Qt v5.x"""

import sys
from PySide6.QtCore import Qt
from PySide6.QtGui import QPainter
from PySide6.QtWidgets import QMainWindow, QApplication
from PySide6.QtCharts import (QBarCategoryAxis, QBarSet, QChart, QChartView,
                              QStackedBarSeries, QValueAxis)


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        low = QBarSet("Min")
        high = QBarSet("Max")
        low.append([-52, -50, -45.3, -37.0, -25.6, -8.0,
                    -6.0, -11.8, -19.7, -32.8, -43.0, -48.0])
        high.append([11.9, 12.8, 18.5, 26.5, 32.0, 34.8,
                     38.2, 34.8, 29.8, 20.4, 15.1, 11.8])

        series = QStackedBarSeries()
        series.append(low)
        series.append(high)

        chart = QChart()
        chart.addSeries(series)
        chart.setTitle("Temperature records in celcius")
        chart.setAnimationOptions(QChart.SeriesAnimations)

        categories = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
                      "Aug", "Sep", "Oct", "Nov", "Dec"]
        axis_x = QBarCategoryAxis()
        axis_x.append(categories)
        axis_x.setTitleText("Month")
        chart.addAxis(axis_x, Qt.AlignBottom)
        axis_y = QValueAxis()
        axis_y.setRange(-52, 52)
        axis_y.setTitleText("Temperature [°C]")
        chart.addAxis(axis_y, Qt.AlignLeft)
        series.attachAxis(axis_x)
        series.attachAxis(axis_y)

        chart.legend().setVisible(True)
        chart.legend().setAlignment(Qt.AlignBottom)

        chart_view = QChartView(chart)
        chart_view.setRenderHint(QPainter.Antialiasing)

        self.setCentralWidget(chart_view)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    w = MainWindow()
    w.resize(600, 300)
    w.show()
    sys.exit(app.exec())