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#!/usr/bin/env python3
#########################################################################
# Copyright (C) 2011-2014 Tavian Barnes <tavianator@tavianator.com> #
# #
# This file is part of Dimension. #
# #
# Dimension is free software; you can redistribute it and/or modify it #
# under the terms of the GNU General Public License as published by the #
# Free Software Foundation; either version 3 of the License, or (at #
# your option) any later version. #
# #
# Dimension is distributed in the hope that it will be useful, but #
# WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU #
# General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <http://www.gnu.org/licenses/>. #
#########################################################################
from PyQt4 import QtCore, QtGui, QtOpenGL
class Preview(QtOpenGL.QGLWidget):
"""Surface that the scene is rendered to."""
def __init__(self, parent, canvas, future):
QtOpenGL.QGLWidget.__init__(self, parent)
self.canvas = canvas
self.future = future
def paintGL(self):
try:
self.future.pause()
self.canvas.draw_GL()
except:
self.future.cancel()
self.parent().close()
raise
finally:
self.future.resume()
class PreviewWindow(QtGui.QMainWindow):
"""Main window for a rendering preview."""
def __init__(self, canvas, future):
QtGui.QMainWindow.__init__(self)
self.canvas = canvas
self.future = future
self.setMinimumSize(canvas.width, canvas.height)
self.setMaximumSize(canvas.width, canvas.height)
self.widget = Preview(self, canvas, future)
self.setCentralWidget(self.widget)
self.render_timer = QtCore.QTimer(self)
self.render_timer.timeout.connect(self.update_preview)
self.render_timer.start(20)
@QtCore.pyqtSlot()
def update_preview(self):
try:
self.widget.updateGL()
if self.future.is_done():
self.render_timer.stop()
self.close_timer = QtCore.QTimer(self)
self.close_timer.singleShot(1000, self.close)
except:
self.future.cancel()
self.close()
raise
@QtCore.pyqtSlot()
def close(self):
QtCore.QCoreApplication.instance().quit()
def show_preview(canvas, future):
app = QtGui.QApplication(["Dimension Preview"])
window = PreviewWindow(canvas, future)
window.show()
app.exec()
del window
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