code: def on_resize(self, event):
      set_viewport(0, 0, *event.physical_size)
  
file_path: vispy/examples/demo/gloo/imshow_cuts.py
imports: import numpy
  from vispy import app
  from vispy.gloo import set_viewport, clear, set_state, Program
label_desc: Use image node_id 2 for calling the Canvas obj's underlying member method code with example usage: obj.on_resize(event) without return types