将我选择的颜色附加到QPieSeries的每个切片上

时间:2019-06-23 20:28:51

标签: python pyqt pyqt5 qtcharts pyqtchart

我想使饼图的每个切片成为我选择的颜色。我需要知道QPieSlice的语法(如果这是我使用的),以及如何将颜色附加到馅饼的特定切片上。例如,我希望“自动”切片为“#00FF00”,“就业”切片为“#1A8CFF”,等等。

下面是我的馅饼。我已经尝试过各种方法,例如:

QPieSlice.setBrush(QPieSlice.setColor(QColor('#00FF00')))

但是它不起作用,即使可以,我也不知道如何将其附加到特定切片上以及放置在何处。

series.append("Auto", self.expensesWindow.piechart[0])
series.append("Employment", self.expensesWindow.piechart[1])
series.append("Insurance", self.expensesWindow.piechart[2])
series.append("Household", self.expensesWindow.piechart[3])
series.append("Housing", self.expensesWindow.piechart[4])
series.append("Entertainment", self.expensesWindow.piechart[5])
series.append("Utilities", self.expensesWindow.piechart[6])
series.append("Other", self.expensesWindow.piechart[7])

1 个答案:

答案 0 :(得分:2)

在使用append()QPieSeries方法时,为其传递名称和值会返回其关联的QPieSlice,因此必须使用该元素

from PyQt5 import QtCore, QtGui, QtWidgets, QtChart


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)

    data = {
        "Auto": (10, QtGui.QColor("#00FF00")),
        "Employment": (20, QtGui.QColor("#1A8CFF")),
        "Insurance": (30, QtGui.QColor("salmon")),
        "Household": (40, QtGui.QColor(255, 0, 255)),
        "Housing": (40, QtGui.QColor("blue")),
        "Entertainment": (30, QtGui.QColor(0, 255, 255)),
        "Utilities": (20, QtGui.QColor("#aabbcc")),
        "Other": (10, QtGui.QColor("gray")),
    }

    series = QtChart.QPieSeries()

    for name, (value, color) in data.items():
        _slice = series.append(name, value)
        _slice.setBrush(color)

    chart = QtChart.QChart()
    chart.addSeries(series)
    chart.setTitle("Example for https://stackoverflow.com/questions/56727499")
    chart.legend().setAlignment(QtCore.Qt.AlignBottom)
    chart.legend().setFont(QtGui.QFont("Arial", 7))

    chartview = QtChart.QChartView(chart)
    chartview.setRenderHint(QtGui.QPainter.Antialiasing)

    w = QtWidgets.QMainWindow()
    w.setCentralWidget(chartview)
    w.resize(640, 480)
    w.show()

    sys.exit(app.exec_())

enter image description here


但是您也可以使用名称和值来构建QPieSlice,也可以使用其他append()方法来传递它:

# ...
series = QtChart.QPieSeries()

for name, (value, color) in data.items():
    _slice = QtChart.QPieSlice(name, value)
    _slice.setBrush(color)
    series.append(_slice)

chart = QtChart.QChart()
# ...

您还可以使用第三个QPieSlice方法通过创建append()的列表进行构建:

# ...
series = QtChart.QPieSeries()

slices = []

for name, (value, color) in data.items():
    _slice = QtChart.QPieSlice(name, value)
    _slice.setBrush(color)
    slices.append(_slice)

series.append(slices)

chart = QtChart.QChart()
# ...

更新

根据您的情况,使用第二种方法:

_slice = series.append("Auto", self.expensesWindow.piechart[0])
_slice.setBrush(QColor('#00FF00'))
_slice = series.append("Employment", self.expensesWindow.piechart[1])
_slice.setBrush(QColor('#1A8CFF'))
# ...