Bug summary

I ran into this bizarre bug, I am not sure if it's a skill issue on my end, but I am trying to embed a plot in my qt6 application. Allowing the user to plot and replot for some reason keeps increasing the sizes of my chart elements, butonly when I have display scaling on (e.g. 125%, 150% etc). To illustrate:

See below for the code, basically I am creating a new plot every time there is a mouse click on that row. Embeddingprint(self.chart.figure.dpi) shows that my plot's dpi keeps doubling every other time I trigger a click. Console output:

100.0100.0200.0200.0400.0400.0

I can workaround this by explicitly setting the figure DPI, e.g. figure.dpi = 100 when creating it. But I assume that means I'm giving up display scaling

Code for reproduction

importmatplotlibmatplotlib.use("Qt5Agg")frommatplotlib.backends.backend_qt5aggimportFigureCanvasQTAggfrommatplotlib.figureimportFigurefromPyQt6.QtWidgetsimport (QWidget,QVBoxLayout,QFrame)classGraphView(QWidget):def__init__(self):super().__init__()self.layout=QVBoxLayout()self.separator=Noneself.chart=MplCanvas()self.figures=Noneself.init_widget()definit_widget(self):self.init_separator()self.layout.addWidget(self.separator)self.layout.addWidget(self.chart)self.setLayout(self.layout)    ...# Note this is the code that triggers when I click a row.defupdate_graph(self,figure):self.chart.deleteLater()self.chart=MplCanvas(fig=figure)self.layout.addWidget(self.chart)self.layout.update()classMplCanvas(FigureCanvasQTAgg):def__init__(self,fig=Figure()):super(MplCanvas,self).__init__(fig)

Actual outcome

Figure DPI keeps dynamically doubling

Expected outcome

DPI shouldn't double like that, it's madness☹️

Additional information

No response

Operating system

Windows, Linux

Matplotlib Version

3.6.3

Matplotlib Backend

QtAgg

Python version

3.11.4

Jupyter version

No response

Installation

pip