python - PyQT - 在 QTableWidget 单元格中显示垂直文本

Question

我找到了 C++ code对于我的问题，但我无法使用 Python 使其工作。我不懂 C++，它就像那里的递归......

class VerticalTextDelegate(QtGui.QStyledItemDelegate):
    def __init__(self, parent):
        super(VerticalTextDelegate, self).__init__()

    def paint(self, painter, option, index):
        optionCopy = QtGui.QStyleOptionViewItem(option)
        rectCenter = QtCore.QPointF(QtCore.QRectF(option.rect).center())
        painter.save()
        painter.translate(rectCenter.x(), rectCenter.y())
        painter.rotate(-90.0)
        painter.translate(-rectCenter.x(), -rectCenter.y())
        optionCopy.rect = painter.worldTransform().mapRect(option.rect)

        # recursion here, I don't understand how it works in C++
        # self.paint(painter, optionCopy, index)

        self.painter.restore()

    def sizeHint(self, option, index):
        val = QtGui.QSize(self.sizeHint(option, index))
        return QtGui.QSize(val.height(), val.width())

运行代码:

    item = QtGui.QTableWidgetItem("test")
    self.table_widget.setItem(2, 0, item)

    self.table_widget.setItemDelegateForColumn(0,VerticalTextDelegate(self))

Answer 1

如果您查看您引用的 C++ 示例，您会发现 VerticalTextDelegate::paint 实现基本上修复了 QPainter 转换然后调用基类实现QStyledItemDelegate::paint。你需要做同样的事情(未经测试)......

def paint(self, painter, option, index):
    optionCopy = QtGui.QStyleOptionViewItem(option)
    rectCenter = QtCore.QPointF(QtCore.QRectF(option.rect).center())
    painter.save()
    painter.translate(rectCenter.x(), rectCenter.y())
    painter.rotate(-90.0)
    painter.translate(-rectCenter.x(), -rectCenter.y())
    optionCopy.rect = painter.worldTransform().mapRect(option.rect)

    # Call the base class implementation
    super(VerticalTextDelegate, self).paint(painter, optionCopy, index)

    painter.restore()