Bug in reference/environment/cursor.py example

[mark-summerfield]

Test script:

This is the cursor.py example:

# put your test script here
from p5 import *

def draw():
    if mouse_x < 180:
        cursor('CROSS')
    else:
        cursor('HAND')

run()

Expected behavior:

Actual behavior

Errors produced (if any):

$ py37 cursor.py 
WARNING: Traceback (most recent call last):
  File "cursor.py", line 9, in <module>
    run()
  File "/home/mark/opt/python37/lib/python3.7/site-packages/p5/sketch/userspace.py", line 142, in run
    app.run()
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/app/_default_app.py", line 62, in run
    return default_app.run()
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/app/application.py", line 142, in run
    return self._backend._vispy_run()
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/app/backends/_glfw.py", line 194, in _vispy_run
    self._vispy_process_events()
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/app/backends/_glfw.py", line 183, in _vispy_process_events
    timer._tick()
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/app/backends/_glfw.py", line 516, in _tick
    self._vispy_timer._timeout()
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/app/timer.py", line 168, in _timeout
    count=self.iter_count)
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/util/event.py", line 455, in __call__
    self._invoke_callback(cb, event)
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/util/event.py", line 475, in _invoke_callback
    self, cb_event=(cb, event))
  << caught exception here: >>
  File "/home/mark/opt/python37/lib/python3.7/site-packages/vispy/util/event.py", line 471, in _invoke_callback
    cb(event)
  File "/home/mark/opt/python37/lib/python3.7/site-packages/p5/sketch/base.py", line 116, in on_timer
    self.draw_method()
  File "cursor.py", line 5, in draw
    cursor('CROSS')
  File "/home/mark/opt/python37/lib/python3.7/site-packages/p5/sketch/userspace.py", line 244, in cursor
    raise NotImplementedError
NotImplementedError
ERROR: Invoking <bound method Sketch.on_timer of <Sketch (Glfw) at 0x7f81ba28d4e0>> for Event
ERROR: Invoking <bound method Sketch.on_timer of <Sketch (Glfw) at 0x7f81ba28d4e0>> repeat 2
ERROR: Invoking <bound method Sketch.on_timer of <Sketch (Glfw) at 0x7f81ba28d4e0>> repeat 4
ERROR: Invoking <bound method Sketch.on_timer of <Sketch (Glfw) at 0x7f81ba28d4e0>> repeat 8
ERROR: Invoking <bound method Sketch.on_timer of <Sketch (Glfw) at 0x7f81ba28d4e0>> repeat 16
ERROR: Invoking <bound method Sketch.on_timer of <Sketch (Glfw) at 0x7f81ba28d4e0>> repeat 32
ERROR: Invoking <bound method Sketch.on_timer of <Sketch (Glfw) at 0x7f81ba28d4e0>> repeat 64
ERROR: Invoking <bound method Sketch.on_timer of <Sketch (Glfw) at 0x7f81ba28d4e0>> repeat 128

p5 version: 0.4.0a1.dev2 Python version: 3.7.0 Operating System: Ubuntu 16.04.5 LTS (64-bit)

[mark-summerfield]

There seems to be a similar bug in no_cursor.py at the cursor('HAND') call.

[abhikpal]

Ah... the cursor code hasn't been ported over to vispy yet! That why it's raising the NotImplementedError for most of them. I'll put a note in the documentation regarding this.