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I have many narrow columns with very long labels. I want to rotate the labels by 90 degrees. Is it possible?

Jérôme
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danatel
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3 Answers3

3

You will probably have to subclass QTableWidgetItem and implement your own vertical text painting. Then use setHorizontalHeaderItem() on your table to point to an instance of your new widget.

Arnold Spence
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When searching for an answer to this questions I found many hints, but no real answer. The hints tell one to subclass QHeaderView and re-implement paintSection. When I tried to do so in PyQt4 and tried to implement paintSection from scratch, following the source of QHeaderView, I was not successful. However, simply rotating the painter instance and adjusting all the size hints was successful. The code works for horizontal headers only and is nicely compact:

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
Peter
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2

I've made a custom script that works fine based on previous answer..

copy and paste the next code in a rotated.py file

#!/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

then import from your main.py file this class using this line:

from rotated import RotatedHeaderView

and complete the actions with this line:

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

hope worth it!

Marcelo
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