How to instantly update the plot by getting values from a Scale widget?

[deanhystad]

I never use colormesh, so I'm not familiar with it. I did find something about animating a colormesh.

https://www.tutorialspoint.com/how-to-an...matplotlib

My guess for scaling a colormesh is you do it much the same way. You keep the QuadMesh object returned by the pcolormesh() call. When you rescale the data you update the coordinates using set_array() and then call canvas.draw() and canvas.flush_events().

From you existing code you'll need to make some of the plotting variables attributes of your class.

c = ax.pcolormesh(x, y, layer, cmap=newcmp, edgecolor='lightgrey', linewidth=0.003)  # Keep this around and give it a better name

The method for rescaling the data will look something like this:

    def update(self):
        # Compute new data
        var = self.data.layer.get()
        nx = 3
        ny = 4
        num_reshaped = np.array(self.num).reshape(10, nx * ny)
        layer = num_reshaped[var - 1:var, :]
        layer = layer.reshape(nx, ny)
        x, y = np.mgrid[slice(0, nx + 1, 1), slice(0, ny + 1, 1)]
        self.c.set_array(x, y)    # Reusing the QuadMesh object from the original plot. Loading in new data
        self.canvas.draw()     # Redraw with new data
        self.canvas.flush_events()  # Not sure if this is needed