我有下面的代码,我注意到当我按ctrl + A来选择所有行时,感觉很费力,大约需要1秒钟才能完成选择。但是,我还注意到,如果用self.horizontalHeader().hide()隐藏水平标题,则延迟完全消失了!为什么会这样?我如何摆脱滞后但保留标题呢?

from PyQt5 import QtGui, QtCore, QtWidgets
from PyQt5.QtCore import Qt
import pandas as pd
import numpy as np
import sys

class SeriesModel(QtCore.QAbstractTableModel):
    def __init__(self, series):
        super().__init__()
        self.series = series

    def columnCount(self, parent=None):
        return 1

    def rowCount(self, parent=None):
        return len(self.series)

    def data(self, index, role=None):
        row = index.row()
        col = index.column()
        if role == QtCore.Qt.DisplayRole or role == QtCore.Qt.ToolTipRole:
            return str(self.series[row])

    # The headers of this table will show the level names of the MultiIndex
    def headerData(self, section, orientation, role=None):
        if role in [QtCore.Qt.DisplayRole, QtCore.Qt.ToolTipRole]:
            if orientation == Qt.Horizontal:
                return str(self.series.name)

class SeriesView(QtWidgets.QTableView):
    def __init__(self, series):
        super().__init__()

        self.setModel(SeriesModel(series))

        # self.horizontalHeader().hide()

# Examples
if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)

    series = pd.Series(np.random.randn(1000000)).rename('MyData')

    view = SeriesView(series)
    view.show()

    sys.exit(app.exec_())

最佳答案

问题是默认情况下QTableView标头中启用了highlightSections属性。此属性意味着,如果选择了某个项目,则标头中暗示重绘的项目也会被选择,在您的情况下,您有1000000,因此将被重绘类似的次数。因此,可能的解决方案是禁用该属性:

class SeriesView(QtWidgets.QTableView):
    def __init__(self, series):
        super().__init__()
        self.setModel(SeriesModel(series))
        self.horizontalHeader().setHighlightSections(False)

关于python - QTableView horizo​​ntalHeader使其很不整洁吗?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/56036129/

10-10 14:00
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