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# -*- coding: utf-8 -*-
# vispy: testskip
# Copyright (c) Vispy Development Team. All Rights Reserved.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
"""
This is a very minimal example that opens a window and makes the background
color to change from black to white to black ...
The wx backend is used to embed the canvas in a simple wx Frame with
a menubar.
"""
import wx
import math
from vispy import app, gloo
class Canvas(app.Canvas):
def __init__(self, *args, **kwargs):
app.Canvas.__init__(self, *args, **kwargs)
self._timer = app.Timer('auto', connect=self.on_timer, start=True)
self.tick = 0
def on_draw(self, event):
gloo.clear(color=True)
def on_timer(self, event):
self.tick += 1 / 60.0
c = abs(math.sin(self.tick))
gloo.set_clear_color((c, c, c, 1))
self.update()
def stop_timer(self):
self._timer.stop()
class TestFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, -1, "Vispy Test",
wx.DefaultPosition, size=(500, 500))
MenuBar = wx.MenuBar()
file_menu = wx.Menu()
file_menu.Append(wx.ID_EXIT, "&Quit")
self.Bind(wx.EVT_MENU, self.on_quit, id=wx.ID_EXIT)
self.Bind(wx.EVT_SHOW, self.on_show)
MenuBar.Append(file_menu, "&File")
self.SetMenuBar(MenuBar)
self.canvas = Canvas(app="wx", parent=self)
def on_quit(self, event):
self.canvas.stop_timer()
self.Close(True)
def on_show(self, event):
self.canvas.show()
event.Skip()
if __name__ == '__main__':
myapp = wx.App(0)
frame = TestFrame()
frame.Show(True)
myapp.MainLoop()
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