* Moved shutdown_kernel method from FrontendWidget to KernelManager.

* Moved application-specific logic for exiting from FrontendWidget to the ipythonqt application.

IPython/frontend/qt/console/console_widget.py

@@ -199,6 +199,7 b' class ConsoleWidget(Configurable, QtGui.QWidget):'
 
         # Override shortcuts for all filtered widgets.
         elif etype == QtCore.QEvent.ShortcutOverride and \
+                self.override_shortcuts and \
                 self._control_key_down(event.modifiers()) and \
                 event.key() in self._shortcuts:
             event.accept()

IPython/frontend/qt/console/frontend_widget.py

@@ -2,7 +2,6 b''
 from collections import namedtuple
 import signal
 import sys
-import time
 
 # System library imports
 from pygments.lexers import PythonLexer
@@ -90,6 +89,9 b' class FrontendWidget(HistoryConsoleWidget, BaseFrontendMixin):'
     # Emitted when an 'execute_reply' has been received from the kernel and
     # processed by the FrontendWidget.
     executed = QtCore.pyqtSignal(object)
+
+    # Emitted when an exit request has been received from the kernel.
+    exit_requested = QtCore.pyqtSignal()
     
     # Protected class variables.
     _CallTipRequest = namedtuple('_CallTipRequest', ['id', 'pos'])
@@ -137,27 +139,12 b' class FrontendWidget(HistoryConsoleWidget, BaseFrontendMixin):'
             complete = not self._input_splitter.push_accepts_more()
         return complete
 
-    def _execute(self, source, hidden, user_variables=None,
-                 user_expressions=None):
+    def _execute(self, source, hidden):
         """ Execute 'source'. If 'hidden', do not show any output.
 
         See parent class :meth:`execute` docstring for full details.
         """
-        # tmp code for testing, disable in real use with 'if 0'.  Only delete
-        # this code once we have automated tests for these fields.
-        if 0:
-            user_variables = ['x', 'y', 'z']
-            user_expressions = {'sum' : '1+1',
-                                'bad syntax' : 'klsdafj kasd f',
-                                'bad call' : 'range("hi")',
-                                'time' : 'time.time()',
-                                }
-        # /end tmp code
-        
-        # FIXME - user_variables/expressions are not visible in API above us.
-        msg_id = self.kernel_manager.xreq_channel.execute(source, hidden,
-                                                          user_variables,
-                                                          user_expressions)
+        msg_id = self.kernel_manager.xreq_channel.execute(source, hidden)
         self._request_info['execute'] = self._ExecutionRequest(msg_id, 'user')
         self._hidden = hidden
         
@@ -235,7 +222,7 b' class FrontendWidget(HistoryConsoleWidget, BaseFrontendMixin):'
         """
         info = self._request_info.get('execute')
         if info and info.id == msg['parent_header']['msg_id'] and \
-                not self._hidden:
+                info.kind == 'user' and not self._hidden:
             # Make sure that all output from the SUB channel has been processed
             # before writing a new prompt.
             self.kernel_manager.sub_channel.flush()
@@ -371,38 +358,6 b' class FrontendWidget(HistoryConsoleWidget, BaseFrontendMixin):'
                 self._append_plain_text('Kernel process is either remote or '
                                         'unspecified. Cannot restart.\n')
 
-    def closeEvent(self, event):
-        reply = QtGui.QMessageBox.question(self, 'Python',
-            'Close console?', QtGui.QMessageBox.Yes, QtGui.QMessageBox.No)
-        if reply == QtGui.QMessageBox.Yes:
-            self.shutdown_kernel()
-            event.accept()
-        else:
-            event.ignore()
-
-    # Move elsewhere to a better location later, possibly rename
-    def shutdown_kernel(self):
-        # Send quit message to kernel.  Once we implement kernel-side setattr,
-        # this should probably be done that way, but for now this will do.
-        self.kernel_manager.xreq_channel.execute(
-            'get_ipython().exit_now=True', silent=True)
-
-        # Don't send any additional kernel kill messages immediately, to give
-        # the kernel a chance to properly execute shutdown actions.
-        # Wait for at most 2s, check every 0.1s.
-        for i in range(20):
-            if self.kernel_manager.is_alive:
-                time.sleep(0.1)
-            else:
-                break
-        else:
-            # OK, we've waited long enough.
-            self.kernel_manager.kill_kernel()
-            
-        # FIXME: This logic may not be quite right... Perhaps the quit call is
-        # made elsewhere by Qt... 
-        QtGui.QApplication.quit()
-
     #---------------------------------------------------------------------------
     # 'FrontendWidget' protected interface
     #---------------------------------------------------------------------------

IPython/frontend/qt/console/ipython_widget.py

@@ -117,12 +117,11 b' class IPythonWidget(FrontendWidget):'
         super(IPythonWidget, self).__init__(*args, **kw)
 
         # IPythonWidget protected variables.
-        self._previous_prompt_obj = None
-        self._payload_handlers = {
+        self._payload_handlers = { 
             self._payload_source_edit : self._handle_payload_edit,
             self._payload_source_exit : self._handle_payload_exit,
-            self._payload_source_page : self._handle_payload_page,
-            }
+            self._payload_source_page : self._handle_payload_page }
+        self._previous_prompt_obj = None
 
         # Initialize widget styling.
         if self.style_sheet:
@@ -253,22 +252,10 b' class IPythonWidget(FrontendWidget):'
             self._append_html(traceback)
         else:
             # This is the fallback for now, using plain text with ansi escapes
-            self._append_plain_text(traceback)
-
-    # Payload handlers with generic interface: each takes the opaque payload
-    # dict, unpacks it and calls the underlying functions with the necessary
-    # arguments
-    def _handle_payload_edit(self, item):
-        self._edit(item['filename'], item['line_number'])
-
-    def _handle_payload_exit(self, item):
-        QtCore.QCoreApplication.postEvent(self, QtGui.QCloseEvent())
-
-    def _handle_payload_page(self, item):
-        self._page(item['data'])
+            self._append_plain_text(traceback)    
 
     def _process_execute_payload(self, item):
-        """ Reimplemented to handle %edit and paging payloads.
+        """ Reimplemented to dispatch payloads to handler methods.
         """
         handler = self._payload_handlers.get(item['source'])
         if handler is None:
@@ -413,6 +400,21 b' class IPythonWidget(FrontendWidget):'
         body = self.out_prompt % number
         return '<span class="out-prompt">%s</span>' % body
 
+    #------ Payload handlers --------------------------------------------------
+
+    # Payload handlers with a generic interface: each takes the opaque payload
+    # dict, unpacks it and calls the underlying functions with the necessary
+    # arguments.
+
+    def _handle_payload_edit(self, item):
+        self._edit(item['filename'], item['line_number'])
+
+    def _handle_payload_exit(self, item):
+        self.exit_requested.emit()
+
+    def _handle_payload_page(self, item):
+        self._page(item['data'])
+
     #------ Trait change handlers ---------------------------------------------
 
     def _style_sheet_changed(self):

IPython/frontend/qt/console/ipythonqt.py

@@ -1,6 +1,10 b''
 """ A minimal application using the Qt console-style IPython frontend.
 """
 
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
 # Systemm library imports
 from PyQt4 import QtGui
 
@@ -11,9 +15,48 b' from IPython.frontend.qt.console.ipython_widget import IPythonWidget'
 from IPython.frontend.qt.console.rich_ipython_widget import RichIPythonWidget
 from IPython.frontend.qt.kernelmanager import QtKernelManager
 
+#-----------------------------------------------------------------------------
 # Constants
+#-----------------------------------------------------------------------------
+
 LOCALHOST = '127.0.0.1'
 
+#-----------------------------------------------------------------------------
+# Classes
+#-----------------------------------------------------------------------------
+
+class MainWindow(QtGui.QMainWindow):
+
+    #---------------------------------------------------------------------------
+    # 'object' interface
+    #---------------------------------------------------------------------------
+    
+    def __init__(self, frontend):
+        """ Create a MainWindow for the specified FrontendWidget.
+        """
+        super(MainWindow, self).__init__()
+        self._frontend = frontend
+        self._frontend.exit_requested.connect(self.close)
+        self.setCentralWidget(frontend)
+    
+    #---------------------------------------------------------------------------
+    # QWidget interface
+    #---------------------------------------------------------------------------
+    
+    def closeEvent(self, event):
+        """ Reimplemented to prompt the user and close the kernel cleanly.
+        """
+        reply = QtGui.QMessageBox.question(self, self.window().windowTitle(),
+            'Close console?', QtGui.QMessageBox.Yes, QtGui.QMessageBox.No)
+        if reply == QtGui.QMessageBox.Yes:
+            self._frontend.kernel_manager.shutdown_kernel()
+            event.accept()
+        else:
+            event.ignore()
+
+#-----------------------------------------------------------------------------
+# Main entry point
+#-----------------------------------------------------------------------------
 
 def main():
     """ Entry point for application.
@@ -89,8 +132,11 b' def main():'
         widget = IPythonWidget(paging=args.paging)
     widget.gui_completion = args.gui_completion
     widget.kernel_manager = kernel_manager
-    widget.setWindowTitle('Python' if args.pure else 'IPython')
-    widget.show()
+
+    # Create the main window.
+    window = MainWindow(widget)
+    window.setWindowTitle('Python' if args.pure else 'IPython')
+    window.show()
 
     # Start the application main loop.
     app.exec_()

IPython/zmq/kernelmanager.py

@@ -685,10 +685,10 b' class KernelManager(HasTraits):'
 
         self._launch_args = kw.copy()
         if kw.pop('ipython', True):
-            from ipkernel import launch_kernel as launch
+            from ipkernel import launch_kernel
         else:
-            from pykernel import launch_kernel as launch
-        self.kernel, xrep, pub, req, hb = launch(
+            from pykernel import launch_kernel
+        self.kernel, xrep, pub, req, hb = launch_kernel(
             xrep_port=xreq[1], pub_port=sub[1], 
             req_port=rep[1], hb_port=hb[1], **kw)
         self.xreq_address = (LOCALHOST, xrep)
@@ -696,6 +696,27 b' class KernelManager(HasTraits):'
         self.rep_address = (LOCALHOST, req)
         self.hb_address = (LOCALHOST, hb)
 
+    def shutdown_kernel(self):
+        """ Attempts to the stop the kernel process cleanly. If the kernel
+        cannot be stopped, it is killed, if possible.
+        """
+        # Send quit message to kernel. Once we implement kernel-side setattr,
+        # this should probably be done that way, but for now this will do.
+        self.xreq_channel.execute('get_ipython().exit_now=True', silent=True)
+
+        # Don't send any additional kernel kill messages immediately, to give
+        # the kernel a chance to properly execute shutdown actions. Wait for at
+        # most 2s, checking every 0.1s.
+        for i in range(20):
+            if self.is_alive:
+                time.sleep(0.1)
+            else:
+                break
+        else:
+            # OK, we've waited long enough.
+            if self.has_kernel:
+                self.kill_kernel()
+
     def restart_kernel(self):
         """Restarts a kernel with the same arguments that were used to launch
         it. If the old kernel was launched with random ports, the same ports