Fixed RemoteGraphicsView on windows

- Avoid using authkey on windows; seems to be broken
 - Included yet another method of accessing shared memory as QImage

pyqtgraph/multiprocess/processes.py

@@ -35,7 +35,7 @@ class Process(RemoteEventHandler):
     ProxyObject for more information.
     """
     
-    def __init__(self, name=None, target=None, executable=None, copySysPath=True, debug=False):
+    def __init__(self, name=None, target=None, executable=None, copySysPath=True, debug=False, timeout=20):
         """
         ============  =============================================================
         Arguments:
@@ -63,12 +63,16 @@ class Process(RemoteEventHandler):
         
         ## random authentication key
         authkey = os.urandom(20)
+
+        ## Windows seems to have a hard time with hmac 
+        if sys.platform.startswith('win'):
+            authkey = None
+
         #print "key:", ' '.join([str(ord(x)) for x in authkey])
         ## Listen for connection from remote process (and find free port number)
         port = 10000
         while True:
             try:
-                ## hmac authentication appears to be broken on windows (says AuthenticationError: digest received was wrong)
                 l = multiprocessing.connection.Listener(('localhost', int(port)), authkey=authkey)
                 break
             except socket.error as ex:
@@ -111,7 +115,7 @@ class Process(RemoteEventHandler):
         self.proc.stdin.close()
         
         ## open connection for remote process
-        self.debugMsg('Listening for child process..')
+        self.debugMsg('Listening for child process on port %d, authkey=%s..' % (port, repr(authkey)))
         while True:
             try:
                 conn = l.accept()
@@ -140,7 +144,12 @@ class Process(RemoteEventHandler):
         
         
 def startEventLoop(name, port, authkey, ppid, debug=False):
+    if debug:
+        import os
+        print('[%d] connecting to server at port localhost:%d, authkey=%s..' % (os.getpid(), port, repr(authkey)))
     conn = multiprocessing.connection.Client(('localhost', int(port)), authkey=authkey)
+    if debug:
+        print('[%d] connected; starting remote proxy.' % os.getpid())
     global HANDLER
     #ppid = 0 if not hasattr(os, 'getppid') else os.getppid()
     HANDLER = RemoteEventHandler(conn, name, ppid, debug=debug)
@@ -380,7 +389,12 @@ class QtProcess(Process):
             self.timer.stop()
     
 def startQtEventLoop(name, port, authkey, ppid, debug=False):
+    if debug:
+        import os
+        print('[%d] connecting to server at port localhost:%d, authkey=%s..' % (os.getpid(), port, repr(authkey)))
     conn = multiprocessing.connection.Client(('localhost', int(port)), authkey=authkey)
+    if debug:
+        print('[%d] connected; starting remote proxy.' % os.getpid())
     from pyqtgraph.Qt import QtGui, QtCore
     #from PyQt4 import QtGui, QtCore
     app = QtGui.QApplication.instance()

pyqtgraph/multiprocess/remoteproxy.py

@@ -97,7 +97,6 @@ class RemoteEventHandler(object):
         after no more events are immediately available. (non-blocking)
         Returns the number of events processed.
         """
-        self.debugMsg('processRequests:')
         if self.exited:
             self.debugMsg('  processRequests: exited already; raise ClosedError.')
             raise ClosedError()
@@ -121,6 +120,7 @@ class RemoteEventHandler(object):
                 print("Error in process %s" % self.name)
                 sys.excepthook(*sys.exc_info())
                 
+        if numProcessed > 0:
             self.debugMsg('processRequests: finished %d requests' % numProcessed)
         return numProcessed
     

pyqtgraph/widgets/RemoteGraphicsView.py

@@ -188,11 +188,16 @@ class Renderer(GraphicsView):
                 self.img = QtGui.QImage(ch, self.width(), self.height(), QtGui.QImage.Format_ARGB32)
             else:
                 address = ctypes.addressof(ctypes.c_char.from_buffer(self.shm, 0))
+
+                # different versions of pyqt have different requirements here..
                 try:
                     self.img = QtGui.QImage(sip.voidptr(address), self.width(), self.height(), QtGui.QImage.Format_ARGB32)
                 except TypeError:
-                    # different versions of pyqt have different requirements here..
+                    try:
                         self.img = QtGui.QImage(memoryview(buffer(self.shm)), self.width(), self.height(), QtGui.QImage.Format_ARGB32)
+                    except TypeError:
+                        # Works on PyQt 4.9.6
+                        self.img = QtGui.QImage(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())
@@ -236,6 +241,3 @@ class Renderer(GraphicsView):
         ev = QtCore.QEvent(QtCore.QEvent.Type(typ))
         return GraphicsView.leaveEvent(self, ev)
 
-
-        
-