I want to open a window with pyqtgraph alone, without using pyqt.

I want to open a window with pyqtgraph alone, without using pyqt.

I’m having trouble displaying a plot using pg.PColorMeshItem in pyqtgraph. Despite following examples and documentation, the plot only shows a black image. Here’s a minimal example of what I’m trying to achieve:

I am using self.vp_plot.setYLink(self.main_plot) however the axis values are not lining up even though the y axis is in fact linked on mouse drag.

I want to align the line indicating the start of the Y axis. As you can see in the image the middle plot is out of line with the top and bottom plot. Apparently because they take up varying amount of space due to the length of the displayed axis values.