PyQT: Rotate a QLabel so that it's positioned diagonally instead of horizontally

Question

I\'m working on a touch screen app where gui space is very tight. I\'d like to rotate a QLabel a bit so that it\'s either vertical, or offset at a diagonal a bit. Any sugg

Answer 1

Answer from @Controlix is a generic implementation, however, I was getting a "recursive painting call" warning. I was able to address that by combining approaches from @Controlix and @Ivo. Here is my implementation:

from PyQt5.Qt import QLabel
from PyQt5 import QtGui


class VerticalLabel(QLabel):

    def __init__(self, *args):
        QLabel.__init__(self, *args)

    def paintEvent(self, event):
        painter = QtGui.QPainter(self)
        painter.translate(0, self.height())
        painter.rotate(-90)
        painter.drawText(0, self.width()/2, self.text())
        painter.end()

Answer 2

QLabel does not do this. But you can easily create your own widget containing a bit of text:

class MyLabel(QtGui.QWidget):
    def paintEvent(self, event):
        painter = QtGui.QPainter(self)
        painter.setPen(QtCore.Qt.black)
        painter.translate(20, 100)
        painter.rotate(-90)
        painter.drawText(0, 0, "hellos")
        painter.end()

Another option is to draw a QGraphicsView, you then have the liberty to map real widgets (i.e. a QLabel) through any coordinate transformation.

Answer 3

I used this post to make another solution that I think is maybe better. Here it is:

class VerticalLabel(QLabel):

    def __init__(self, *args):
        QLabel.__init__(self, *args)

    def paintEvent(self, event):
        QLabel.paintEvent(self, event)
        painter = QPainter (self)
        painter.translate(0, self.height()-1)
        painter.rotate(-90)
        self.setGeometry(self.x(), self.y(), self.height(), self.width())
        QLabel.render(self, painter)

    def minimumSizeHint(self):
        size = QLabel.minimumSizeHint(self)
        return QSize(size.height(), size.width())

    def sizeHint(self):
        size = QLabel.sizeHint(self)
        return QSize(size.height(), size.width())

Answer 4

Try this

class myStyle(QCommonStyle):

    def __init__(self, angl=0, point=QPoint(0, 0)):
        super(myStyle, self).__init__()
        self.angl = angl
        self.point = point

    def drawItemText(self, painter, rect, flags, pal, enabled, text, textRole):
        if not text:
            return
        savedPen = painter.pen()
        if textRole != QPalette.NoRole:
            painter.setPen(QPen(pal.brush(textRole), savedPen.widthF()))
        if not enabled:
            pen = painter.pen()
            painter.setPen(pen)
        painter.translate(self.point)
        painter.rotate(self.angl)
        painter.drawText(rect, flags, text)
        painter.setPen(savedPen)

and

label = QLabel()
label.setStyle(myStyle(-45, QPoint(0, 100)))