class MyQGraphicsView(QtGui.QGraphicsView):
photoClicked = QtCore.pyqtSignal(QtCore.QPoint)
...
def toggleDragMode(self):
if self.dragMode() == QtGui.QGraphicsView.ScrollHandDrag:
self.setDragMode(QtGui.QGraphicsView.NoDrag)
elif not self._photo.pixmap().isNull():
self.setDragMode(QtGui.QGraphicsView.ScrollHandDrag)
def mousePressEvent(self, event):
try:
if self.scene.isUnderMouse():
self.photoClicked.emit(QtCore.QPoint(event.pos()))
# keep the default behaviour
super(MyQGraphicsView, self).mousePressEvent(event)
except Exception as e:
print(e)
def sizeHint(self):
return QSize(400, 400)
class QIPythonWidget(RichJupyterWidget):
""" Convenience class for a live IPython console widget. We can replace the standard banner using the
customBanner argument"""
kernel_status_signal = QtCore.pyqtSignal(object)
def __init__(self, customBanner=None, *args, **kwargs):
if customBanner != None:
self.banner = customBanner
super().__init__()
self.font_size = 6
self.kernel_manager = QtKernelManager()
self.kernel_manager.start_kernel()
self.kernel_manager.kernel.gui = 'qt'
self.kernel_client = self._kernel_manager.client()
self.kernel_client.start_channels()
self.kernel_client.iopub_channel.message_received.connect(
self.update_kernel_status)
def stop():
self.kernel_client.stop_channels()
self.kernel_manager.shutdown_kernel()
self.exit_requested.connect(stop)
self.init_logging_level()
def init_logging_level(self):
self.logging_level = {}
for i in range(101):
if logging.getLevelName(i)[:5] != 'Level':
self.logging_level[logging.getLevelName(i)] = i
def _handle_stream(self, msg):
""" Handle stdout, stderr, and stdin.
"""
self.log.debug("stream: %s", msg.get('content', ''))
for level in self.logging_level.keys():
if level in msg['content']['text']:
self.kernel_status_signal.emit(self.logging_level[level])
if self.include_output(msg):
self.flush_clearoutput()
self.append_stream(msg['content']['text'])
def update_kernel_status(self, msg):
try:
if msg['header']['msg_type'] == 'status':
self.kernel_status = msg['content']['execution_state']
self.kernel_status_signal.emit(self.kernel_status)
except Exception as e:
print(e)
def shutdown_kernel(self):
self.kernel_client.stop_channels()
self.kernel_manager.shutdown_kernel()
def restart_kernel(self):
self.kernel_client.stop_channels()
self.kernel_manager.shutdown_kernel()
self.kernel_manager = QtKernelManager()
self.kernel_manager.start_kernel()
self.kernel_manager.kernel.gui = 'qt'
self.kernel_client = self._kernel_manager.client()
self.kernel_client.start_channels()
self.kernel_client.iopub_channel.message_received.connect(
self.update_kernel_status)
def pushVariables(self, variableDict):
""" Given a dictionary containing name / value pairs, push those variables to the IPython console widget """
self.kernel_manager.kernel.shell.push(variableDict)
def clearTerminal(self):
""" Clears the terminal """
self._control.clear()
def printText(self, text):
""" Prints some plain text to the console """
self._append_plain_text(text)
def executeCommand(self, command):
self.printText(command + '\n')
""" Execute a command in the frame of the console widget """
self._execute(command, False)
