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# /*#########################################################################
#
# The PyMca X-Ray Fluorescence Toolkit
#
# Copyright (c) 2004-2015 European Synchrotron Radiation Facility
#
# This file is part of the PyMca X-ray Fluorescence Toolkit developed at
# the ESRF by the Software group.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
__author__ = "T. Vincent - ESRF Data Analysis"
__contact__ = "thomas.vincent@esrf.fr"
__license__ = "MIT"
__copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
__doc__ = """
OpenGL/Qt QGLWidget backend.
"""
# import ######################################################################
from PyMca5.PyMcaGui.PyMcaQt import pyqtSignal, QSize, Qt
from PyMca5.PyMcaGui.PyMcaQt import QGLWidget, QGLContext
from PyMca5.PyMcaGui.PyMcaQt import QCursor
from ._OpenGLPlotCanvas import OpenGLPlotCanvas
from ._OpenGLPlotCanvas import CURSOR_DEFAULT, CURSOR_POINTING, \
CURSOR_SIZE_HOR, CURSOR_SIZE_VER, CURSOR_SIZE_ALL
from .GLSupport import setGLContextGetter
# OpenGLBackend ###############################################################
# Init GL context getter
setGLContextGetter(QGLContext.currentContext)
class OpenGLBackend(QGLWidget, OpenGLPlotCanvas):
_signalRedisplay = pyqtSignal() # PyQt binds it to instances
def __init__(self, parent=None, **kw):
QGLWidget.__init__(self, parent)
self._signalRedisplay.connect(self.update)
self.setAutoFillBackground(False)
self.setMouseTracking(True)
OpenGLPlotCanvas.__init__(self, parent, **kw)
def postRedisplay(self):
"""Thread-safe call to QWidget.update."""
self._signalRedisplay.emit()
# Mouse events #
_MOUSE_BTNS = {1: 'left', 2: 'right', 4: 'middle'}
def sizeHint(self):
return QSize(8 * 80, 6 * 80) # Mimic MatplotlibBackend
def mousePressEvent(self, event):
xPixel, yPixel = event.x(), event.y()
btn = self._MOUSE_BTNS[event.button()]
self.onMousePress(xPixel, yPixel, btn)
event.accept()
def mouseMoveEvent(self, event):
xPixel, yPixel = event.x(), event.y()
self.onMouseMove(xPixel, yPixel)
event.accept()
def mouseReleaseEvent(self, event):
xPixel, yPixel = event.x(), event.y()
btn = self._MOUSE_BTNS[event.button()]
self.onMouseRelease(xPixel, yPixel, btn)
event.accept()
def wheelEvent(self, event):
xPixel, yPixel = event.x(), event.y()
if hasattr(event, 'angleDelta'): # Qt 5
delta = event.angleDelta().y()
else: # Qt 4 support
delta = event.delta()
angleInDegrees = delta / 8.
self.onMouseWheel(xPixel, yPixel, angleInDegrees)
event.accept()
_CURSORS = {
CURSOR_DEFAULT: Qt.ArrowCursor,
CURSOR_POINTING: Qt.PointingHandCursor,
CURSOR_SIZE_HOR: Qt.SizeHorCursor,
CURSOR_SIZE_VER: Qt.SizeVerCursor,
CURSOR_SIZE_ALL: Qt.SizeAllCursor,
}
def setCursor(self, cursor=CURSOR_DEFAULT):
cursor = self._CURSORS[cursor]
super(OpenGLBackend, self).setCursor(QCursor(cursor))
# Widget
def getWidgetHandle(self):
return self
# PySide seems to need proxy methods
def initializeGL(self):
return OpenGLPlotCanvas.initializeGL(self)
def paintGL(self):
return OpenGLPlotCanvas.paintGL(self)
def resizeGL(self, width, height):
return OpenGLPlotCanvas.resizeGL(self, width, height)
# demo ########################################################################
if __name__ == "__main__":
import numpy as np
import sys
from ..Plot import Plot
try:
from PyQt4.QtGui import QApplication
except ImportError:
try:
from PyQt5.QtWidgets import QApplication
except ImportError:
from PySide.QtGui import QApplication
app = QApplication([])
w = Plot(None, backend=OpenGLBackend)
size = 4096
data = np.arange(float(size)*size, dtype=np.dtype(np.float32))
data.shape = size, size
colormap = {'name': 'gray', 'normalization': 'linear',
'autoscale': True, 'vmin': 0.0, 'vmax': 1.0,
'colors': 256}
w.addImage(data, legend="image 1",
xScale=(25, 1.0), yScale=(-1000, 1.0),
replot=False, colormap=colormap)
w.getWidgetHandle().show()
sys.exit(app.exec())
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