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# -*- coding: utf-8 -*-
# Copyright (c) Vispy Development Team. All Rights Reserved.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
"""
This example shows how to retrieve event information from a callback.
You should see information displayed for any event you triggered.
"""
from vispy import gloo, app
class Canvas(app.Canvas):
def __init__(self, *args, **kwargs):
app.Canvas.__init__(self, *args, **kwargs)
self.title = 'App demo'
def on_close(self, event):
print('closing!')
def on_resize(self, event):
print('Resize %r' % (event.size, ))
def on_key_press(self, event):
modifiers = [key.name for key in event.modifiers]
print('Key pressed - text: %r, key: %s, modifiers: %r' % (
event.text, event.key.name, modifiers))
def on_key_release(self, event):
modifiers = [key.name for key in event.modifiers]
print('Key released - text: %r, key: %s, modifiers: %r' % (
event.text, event.key.name, modifiers))
def on_mouse_press(self, event):
self.print_mouse_event(event, 'Mouse press')
def on_mouse_release(self, event):
self.print_mouse_event(event, 'Mouse release')
def on_mouse_move(self, event):
self.print_mouse_event(event, 'Mouse move')
def on_mouse_wheel(self, event):
self.print_mouse_event(event, 'Mouse wheel')
def print_mouse_event(self, event, what):
modifiers = ', '.join([key.name for key in event.modifiers])
print('%s - pos: %r, button: %s, modifiers: %s, delta: %r' %
(what, event.pos, event.button, modifiers, event.delta))
def on_draw(self, event):
gloo.clear(color=True, depth=True)
if __name__ == '__main__':
canvas = Canvas(keys='interactive')
canvas.show()
app.run()
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