OpenSubdiv/examples/python/canvas.py

#
#     Copyright 2013 Pixar
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License
#     and the following modification to it: Section 6 Trademarks.
#     deleted and replaced with:
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#     6. Trademarks. This License does not grant permission to use the
#     trade names, trademarks, service marks, or product names of the
#     Licensor and its affiliates, except as required for reproducing
#     the content of the NOTICE file.
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#     You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing,
#     software distributed under the License is distributed on an
#     "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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from PyQt4 import QtCore
from PyQt4.QtOpenGL import *
from OpenGL.GL import *
from time import time

# Set this to 'None' to refresh as rapidly as possible
# (assuming that vsync is disabled.)
ThrottleFps = 60

class Canvas(QGLWidget):
    def __init__(self, parent, client):
        self.client = client
        f = QGLFormat(QGL.SampleBuffers)
        if hasattr(QGLFormat, 'setVersion'):
            f.setVersion(3, 2)
            f.setProfile(QGLFormat.CoreProfile)
        else: 
            pass
        if f.sampleBuffers():
            f.setSamples(16)
        c = QGLContext(f, None)
        QGLWidget.__init__(self, c, parent) 
        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self.updateGL)
        interval = 1000.0 / ThrottleFps if ThrottleFps else 0
        self.timer.start(interval)
        self.setMinimumSize(500, 500)

    def paintGL(self):
        self.client.draw()

    def updateGL(self):
        self.client.draw()
        self.update()

    def resizeGL(self, w, h):
        self.client.resize(w, h)

    def initializeGL(self):
        self.client.init()