百分比条形图示例¶

该示例展示了如何创建一个简单的百分比条形图。

百分比条形图将数据集显示为每个类别中所有数据集的百分比。

创建百分比条形图与创建常规条形图类似，不同之处在于，对于百分比条形图，我们使用QPercentBarSeries API而不是QBarSeries。此外，在条形图中，我们使用了nice numbers算法使y轴编号看起来更好。对于百分比条形图，则不需要这样做，因为y轴的最大值始终为100。

下载这个示例

percentbarchart.py

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

"""PySide6 port of the Percent Bar Chart 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,
                              QPercentBarSeries)


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        set0 = QBarSet("Jane")
        set1 = QBarSet("John")
        set2 = QBarSet("Axel")
        set3 = QBarSet("Mary")
        set4 = QBarSet("Samantha")

        set0.append([1, 2, 3, 4, 5, 6])
        set1.append([5, 0, 0, 4, 0, 7])
        set2.append([3, 5, 8, 13, 8, 5])
        set3.append([5, 6, 7, 3, 4, 5])
        set4.append([9, 7, 5, 3, 1, 2])

        series = QPercentBarSeries()
        series.append(set0)
        series.append(set1)
        series.append(set2)
        series.append(set3)
        series.append(set4)

        chart = QChart()
        chart.addSeries(series)
        chart.setTitle("Simple percentbarchart example")
        chart.setAnimationOptions(QChart.SeriesAnimations)

        categories = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
        axis = QBarCategoryAxis()
        axis.append(categories)
        chart.createDefaultAxes()
        chart.addAxis(axis, Qt.AlignBottom)
        series.attachAxis(axis)

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

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

        self.setCentralWidget(chart_view)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    w = MainWindow()
    w.resize(420, 300)
    w.show()
    sys.exit(app.exec())