QChart添加轴未显示,并且悬停的信息无法正常工作吗?

问题描述 投票:0回答:1

我使用pyqt5绘制一个简单的图表,需要添加自定义轴,但是当我添加axis时,该图表未显示它,并且当悬停信号发出时,我需要显示相应的点,但它也未显示,它需要单击以显示。

class Demo(QChartView):
    def __init__(self):
        super().__init__()
        self.chart = QChart()
        self.setChart(self.chart)
        self.setRenderHint(QPainter.Antialiasing)

        axis_x = QValueAxis()
        axis_x.setTickCount(10)
        axis_x.setTitleText('x')
        self.chart.addAxis(axis_x, Qt.AlignBottom)

        axis_y= QValueAxis()
        axis_y.setLinePenColor(Qt.red)
        self.chart.addAxis(axis_y, Qt.AlignLeft)

        series = QLineSeries()
        series.setPointsVisible(True)
        series.hovered.connect(self.show_tool_tip)
        series << QPointF(1, 5) << QPointF(3.5, 18) << QPointF(4.8, 7.5) << QPointF(10, 2.5)

        series.attachAxis(axis_x)
        series.attachAxis(axis_y)
        self.chart.addSeries(series)
        self.value_label = QLabel(self)

    def show_tool_tip(self, pt, state):
        pos = self.chart.mapToPosition(pt)
        if state:
            self.value_label.move(int(pos.x()), int(pos.y()))
            self.value_label.setText(f'{pt}')
            self.value_label.show()
        else:
            self.value_label.hide()

“

python pyqt pyqt5 qchart
1个回答
0
投票

1。添加自定义轴:

如果您在控制台/ CMD中运行代码,您将获得以下命令:

Series not in the chart. Please addSeries to chart first.
Series not in the chart. Please addSeries to chart first.

这显然表明您必须先将系列添加到QChart,然后添加轴:

self.chart.addSeries(series) # first add the series
series.attachAxis(axis_x)
series.attachAxis(axis_y)

2。在相应的位置显示QLabel:

正在等待我的评论以提出解决方案。]]

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