滚动标题 - QTableView / QTableWidget

Question

如果表格不可见，则使用滚动条时默认会冻结垂直和水平标题。我希望滚动也适用于标题，因此滚动时，它们始终不可见。

这是例子：

import string
import random
from typing import Optional

from PySide6.QtCore import Qt
from PySide6.QtWidgets import QTableWidget, QWidget, QAbstractItemView, QHeaderView, QTableWidgetItem, QHBoxLayout, \
    QApplication


class DataTable(QTableWidget):

    # region Constructor

    def __init__(self, parent: Optional[QWidget] = None):
        super(DataTable, self).__init__(parent)

        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.setSelectionBehavior(QAbstractItemView.SelectItems)
        self.setHorizontalScrollMode(QAbstractItemView.ScrollPerPixel)

        self.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
        self.horizontalHeader().setTextElideMode(Qt.ElideMiddle)

        for j in range(20):
            if self.columnCount() <= j:
                self.insertColumn(j)
            for i in range(20):
                if self.rowCount() <= i:
                    self.insertRow(i)
                self.setItem(i, j, QTableWidgetItem('Hello'))

        word = ''.join(random.choice(string.ascii_letters) for _ in range(6))
        self.setHorizontalHeaderLabels([str(word) for i in range(self.columnCount())])
        self.setVerticalHeaderLabels([str(word) for i in range(self.rowCount())])


if __name__ == '__main__':
    app = QApplication()

    widget = QWidget()
    widget.resize(400, 600)
    layout = QHBoxLayout(widget)
    layout.addWidget(DataTable())
    widget.show()

    app.exec()

这就是它的样子（见滚动条在右侧）：

我想要的外观（基本上水平和垂直标题应该随着滚动而移动）：

Answer 1

对于任何感兴趣的人，我下面的代码有效。所以我基本上将 QTableWidget 包装在 QScrollArea 中，禁用 QTableWidget 中的滚动条并更新最小大小。

import string
import random
from typing import Optional

from PySide6.QtCore import Qt, QSize
from PySide6.QtWidgets import QTableWidget, QWidget, QAbstractItemView, QHeaderView, QTableWidgetItem, QHBoxLayout, \
    QApplication, QScrollArea


class DataTable(QScrollArea):

    # region Constructor

    def __init__(self, parent: Optional[QWidget] = None):
        super(DataTable, self).__init__(parent)
        self.setWidget(DataTableWidget(self))
        self.setWidgetResizable(True)


class DataTableWidget(QTableWidget):

    def __init__(self, parent: Optional[QWidget] = None):
        super(DataTableWidget, self).__init__(parent)
        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.setSelectionBehavior(QAbstractItemView.SelectItems)
        self.setHorizontalScrollMode(QAbstractItemView.ScrollPerPixel)

        self.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
        self.horizontalHeader().setTextElideMode(Qt.ElideMiddle)

        self.setSizeAdjustPolicy(QAbstractItemView.AdjustToContents)

        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)

        for j in range(20):
            if self.columnCount() <= j:
                self.insertColumn(j)
            for i in range(20):
                if self.rowCount() <= i:
                    self.insertRow(i)
                self.setItem(i, j, QTableWidgetItem('Hello'))

        word = ''.join(random.choice(string.ascii_letters) for _ in range(6))
        self.setHorizontalHeaderLabels([str(word) for i in range(self.columnCount())])
        self.setVerticalHeaderLabels([str(word) for i in range(self.rowCount())])

        self.setMinimumSize(self.get_table_widget_size())

    def get_table_widget_size(self):
        w = self.verticalHeader().width() + 4  # +4 seems to be needed
        for i in range(self.columnCount()):
            w += self.columnWidth(i)  # seems to include gridline (on my machine)
        h = self.horizontalHeader().height() + 4
        for i in range(self.rowCount()):
            h += self.rowHeight(i)
        return QSize(w, h)


if __name__ == '__main__':
    app = QApplication()

    widget = QWidget()
    widget.resize(400, 600)
    layout = QHBoxLayout(widget)
    layout.addWidget(DataTable())
    widget.show()

    app.exec()