Cannot put a text a TextItem on a CurveArrow

[CastorCast]

Short description

I'm trying to set a CurveArrow item as parent of a TextItem, as in "Text.py" example (in Text.py it's a CurvePoint that is use as a parent of TextItem). So I have tried for a first time to modify CurveArrow in CurvePoint.py by adding a TextItem, but the text wasn't displaying, so I put the modification in my copy of the example and putting in comment the modification I made.

Code to reproduce

in CurvePoint.py :

import weakref
from math import atan2, degrees

from ..functions import clip_scalar
from ..Qt import QtCore, QtWidgets
from . import ArrowItem, TextItem, LabelItem
from .GraphicsObject import GraphicsObject

...

class CurveArrow(CurvePoint):
    """Provides an arrow that points to any specific sample on a PlotCurveItem.
    Provides properties that can be animated."""
    
    def __init__(self, curve, index=0, rotate=True, pos=None, **opts):
        CurvePoint.__init__(self, curve, index=index, pos=pos, rotate=rotate)
        if opts.get('pxMode', True):
            opts['pxMode'] = False
            self.setFlags(self.flags() | self.GraphicsItemFlag.ItemIgnoresTransformations)
        # opts['angle'] = 0
        # self.Text = TextItem.TextItem("Test", anchor=(0.5, -1.0))
        # self.Text.setParentItem(self)
        self.arrow = ArrowItem.ArrowItem(**opts)
        self.arrow.setParentItem(self)
        # print(self.Text)
        
    def setStyle(self, **opts):
        return self.arrow.setStyle(**opts)

in TestText.py :

import numpy as np

import pyqtgraph as pg
from pyqtgraph.Qt import QtCore

x = np.linspace(-20, 20, 1000)
y = np.sin(x) / x
plot = pg.plot()   ## create an empty plot widget
plot.setYRange(-1, 2)
plot.setWindowTitle('pyqtgraph example: text')
curve = plot.plot(x,y)  ## add a single curve

# Create an animated arrow (cursor) that track the curve 
curvePoint = pg.CurveArrow(curve, rotate=False, angle=90)
plot.addItem(curvePoint)
# Configure the TextItem
Text = pg.TextItem("test", anchor=(0.5, -1.0))
Text.setParentItem(curvePoint)

## update position every 10ms
index = 0
def update():
    global curvePoint, index
    index = (index + 1) % len(x)
    curvePoint.setPos(float(index)/(len(x)-1))
    # text2.setText('[%0.1f, %0.1f]' % (x[index], y[index]))
    # curvePoint.Text('[%0.1f, %0.1f]' % (x[index], y[index]))
    Text.setText('[%0.1f, %0.1f]' % (x[index], y[index]))
    
timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.start(10)

if __name__ == '__main__':
    pg.exec()

Expected behavior

I should have the same behavior as the example "Text.py", so an arrow and a text that are animated and follow the sinc(x).

Real behavior

I have the arrow that is animated and follows the curve, but I don't have any text that notifies me about the position of the arrow on the curve. Additionally, I'm using this example to identify an error in one of my scripts: It's a simple script that adds a CurveArrow to a curve. I encountered this error while using the modified CurveArrow. :

QWinFontEngine: unable to query transformed glyph metrics (GetGlyphOutline() failed, error 1003)... (Impossible dÆaccomplir cette fonction.)
QPainter::begin: Paint device returned engine == 0, type: 3
QPainter::setCompositionMode: Painter not active
QPainter::end: Painter not active, aborted

Tested environment(s)

• PyQtGraph version: <0.13.3>
• Qt Python binding: <PyQt5 5.15.4 Qt 5.15.2>
• Python version: Python 3.10.6
• NumPy version: <1.24.2>
• Operating system: Windows 11
• Installation method: pip

Additional context

I thank you in advance for any help
Edit1 : I forgot to tell that I add the argument "rotate" with default value "True" and put the line "opts['angle'] = 0" as I wanted to have something like CurvePoint.

[pijyoi]

The lines that make a CurveArrow different from a CurvePoint.
If you comment them out, the text shows up.

pyqtgraph/pyqtgraph/graphicsItems/CurvePoint.py

Lines 113 to 116 in 4de3bf9

	if opts.get('pxMode', True):
	opts['pxMode'] = False
	self.setFlags(self.flags() | self.GraphicsItemFlag.ItemIgnoresTransformations)
	opts['angle'] = 0

From what I understand, their purpose is to make the arrow be at a tangential angle to the curve.