Qt - QTable 可以将列标签旋转 90 度吗？

Question

我有许多带有很长标签的狭窄列。我想将标签旋转 90 度。是否可以？

Answer 1

您可能必须继承 QTableWidgetItem 并实现您自己的垂直文本绘制。然后在表格上使用 setHorizo​​ntalHeaderItem() 来指向新小部件的实例。

Answer 2

在寻找这个问题的答案时，我发现了很多提示，但没有真正的答案。提示告诉我们子类化 QHeaderView 并重新实现 PaintSection。当我尝试在 PyQt4 中执行此操作并尝试按照 QHeaderView 的源代码从头开始实现 PaintSection 时，我没有成功。然而，简单地旋转画家实例并调整所有尺寸提示就成功了。
该代码仅适用于水平标题，并且非常紧凑：

from PyQt4 import QtGui, QtCore

class RotatedHeaderView( QtGui.QHeaderView ):
    def __init__(self, orientation, parent=None ):
        super(RotatedHeaderView, self).__init__(orientation, parent)
        self.setMinimumSectionSize(20)

    def paintSection(self, painter, rect, logicalIndex ):
        painter.save()
        # translate the painter such that rotate will rotate around the correct point
        painter.translate(rect.x()+rect.width(), rect.y())
        painter.rotate(90)
        # and have parent code paint at this location
        newrect = QtCore.QRect(0,0,rect.height(),rect.width())
        super(RotatedHeaderView, self).paintSection(painter, newrect, logicalIndex)
        painter.restore()

    def minimumSizeHint(self):
        size = super(RotatedHeaderView, self).minimumSizeHint()
        size.transpose()
        return size

    def sectionSizeFromContents(self, logicalIndex):
        size = super(RotatedHeaderView, self).sectionSizeFromContents(logicalIndex)
        size.transpose()
        return size

Answer 3

我制作了一个自定义脚本，根据之前的答案可以正常工作。

将下一个代码复制并粘贴到rotated.py 文件中，

#!/usr/bin/env python

from PyQt4.QtCore import *
from PyQt4.QtGui import *

class RotatedHeaderView(QHeaderView):
    def __init__(self, parent=None):
        super(RotatedHeaderView, self).__init__(Qt.Horizontal, parent)
        self.setMinimumSectionSize(20)

    def paintSection(self, painter, rect, logicalIndex ):
        painter.save()
        # translate the painter such that rotate will rotate around the correct point
        painter.translate(rect.x()+rect.width(), rect.y())
        painter.rotate(90)
        # and have parent code paint at this location
        newrect = QRect(0,0,rect.height(),rect.width())
        super(RotatedHeaderView, self).paintSection(painter, newrect, logicalIndex)
        painter.restore()

    def minimumSizeHint(self):
        size = super(RotatedHeaderView, self).minimumSizeHint()
        size.transpose()
        return size

    def sectionSizeFromContents(self, logicalIndex):
        size = super(RotatedHeaderView, self).sectionSizeFromContents(logicalIndex)
        size.transpose()
        return size

然后使用此行从 main.py 文件导入此类：

from rotated import RotatedHeaderView

并使用此行完成操作：

self.YourTableName.setHorizontalHeader(RotatedHeaderView(self.YourTableName))

希望值得！