Update plot.py

[jomosh]

The new ImageItem.scale() (from pyqtgraph) no longer accepts any arguments

[Eths33]

I also saw the same error probably. [ I installed via pip3 ]

Traceback (most recent call last):
  File "C:\Python311\Lib\site-packages\qspectrumanalyzer\plot.py", line 298, in update_plot
    self.waterfallImg.scale(x_scale)
TypeError: scale(self): too many arguments

I updated the function like this with additional checks. I have not tested much though.

def update_plot(self, data_storage):
        """Update waterfall plot"""
        self.counter += 1

        # Calculate scale if there is enough data, else default to 1
        if len(data_storage.x) > 1:
            uniform_scale = (data_storage.x[-1] - data_storage.x[0]) / len(data_storage.x)
        else:
            uniform_scale = 1  # Default scale if not enough data

        # Create waterfall image on first run
        if self.counter == 1:
            self.waterfallImg = pg.ImageItem()
            self.waterfallImg.setScale(uniform_scale)  # Using setScale for uniform scaling
            self.plot.clear()
            self.plot.addItem(self.waterfallImg)

        # Ensure there is new data to update
        if data_storage.history.buffer.shape[0] >= self.counter:
            # Roll down one and replace leading edge with new data
            self.waterfallImg.setImage(data_storage.history.buffer[-self.counter:].T,
                                    autoLevels=False, autoRange=False)

            # Move waterfall image to always start at 0
            self.waterfallImg.setPos(
                data_storage.x[0] if len(data_storage.x) > 0 else 0,
                -self.counter if self.counter < self.history_size else -self.history_size
            )

            # Link histogram widget to waterfall image on first run
            if self.counter == 1 and self.histogram_layout:
                self.histogram.setImageItem(self.waterfallImg)

[vixadd]

I've provided a solution for this bug in this PR as well. #114