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remotegraphicsview fix for PyQt 4.10

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This commit is contained in:
Luke Campagnola 2013-04-07 16:18:58 -04:00
parent daaf481830
commit 1a0b5921df
2 changed files with 14 additions and 6 deletions
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12
examples/RemoteGraphicsView.py
View File

@ -1,20 +1,26 @@
# -*- coding: utf-8 -*-
"""
Very simple example demonstrating RemoteGraphicsView
Very simple example demonstrating RemoteGraphicsView.
This allows graphics to be rendered in a child process and displayed in the
parent, which can improve CPU usage on multi-core processors.
"""
import initExample ## Add path to library (just for examples; you do not need this)
from pyqtgraph.Qt import QtGui, QtCore
import pyqtgraph as pg
from pyqtgraph.widgets.RemoteGraphicsView import RemoteGraphicsView
app = pg.mkQApp()
v = RemoteGraphicsView()
## Create the widget
v = RemoteGraphicsView(debug=False)
v.show()
v.setWindowTitle('pyqtgraph example: RemoteGraphicsView')
## v.pg is a proxy to the remote process' pyqtgraph module. All attribute
## requests and function calls made with this object are forwarded to the
## remote process and executed there.
## remote process and executed there. See pyqtgraph.multiprocess.remoteproxy
## for more inormation.
plt = v.pg.PlotItem()
v.setCentralItem(plt)
plt.plot([1,4,2,3,6,2,3,4,2,3], pen='g')

8
pyqtgraph/widgets/RemoteGraphicsView.py
View File

@ -1,4 +1,6 @@
from pyqtgraph.Qt import QtGui, QtCore, USE_PYSIDE
if not USE_PYSIDE:
import sip
import pyqtgraph.multiprocess as mp
import pyqtgraph as pg
from .GraphicsView import GraphicsView
@ -21,7 +23,7 @@ class RemoteGraphicsView(QtGui.QWidget):
self._sizeHint = (640,480) ## no clue why this is needed, but it seems to be the default sizeHint for GraphicsView.
## without it, the widget will not compete for space against another GraphicsView.
QtGui.QWidget.__init__(self)
self._proc = mp.QtProcess(debug=False)
self._proc = mp.QtProcess(debug=kwds.pop('debug', False))
self.pg = self._proc._import('pyqtgraph')
self.pg.setConfigOptions(**self.pg.CONFIG_OPTIONS)
rpgRemote = self._proc._import('pyqtgraph.widgets.RemoteGraphicsView')
@ -174,7 +176,6 @@ class Renderer(GraphicsView):
self.shm = mmap.mmap(-1, size, self.shmtag)
else:
self.shm.resize(size)
address = ctypes.addressof(ctypes.c_char.from_buffer(self.shm, 0))
## render the scene directly to shared memory
if USE_PYSIDE:
@ -182,7 +183,8 @@ class Renderer(GraphicsView):
#ch = ctypes.c_char_p(address)
self.img = QtGui.QImage(ch, self.width(), self.height(), QtGui.QImage.Format_ARGB32)
else:
self.img = QtGui.QImage(address, self.width(), self.height(), QtGui.QImage.Format_ARGB32)
address = ctypes.addressof(ctypes.c_char.from_buffer(self.shm, 0))
self.img = QtGui.QImage(sip.voidptr(address), self.width(), self.height(), QtGui.QImage.Format_ARGB32)
self.img.fill(0xffffffff)
p = QtGui.QPainter(self.img)
self.render(p, self.viewRect(), self.rect())