#!/usr/bin/env python
# coding: utf-8

# # A few things that work best/only at the IPython terminal or Qt console clients

# ## Running code with `%run`

# In[1]:


get_ipython().run_cell_magic('writefile', 'script.py', "x = 10\ny = 20\nz = x+y\nprint('z is: %s' % z)\n")


# In[2]:


get_ipython().run_line_magic('run', 'script')


# In[3]:


x


# ## Event loop and GUI integration

# The `%gui` magic enables the integration of GUI event loops with the interactive execution loop, allowing you to run GUI code without blocking IPython.
# 
# Consider for example the execution of Qt-based code. Once we enable the Qt gui support:

# In[4]:


get_ipython().run_line_magic('gui', 'qt')


# We can define a simple Qt application class (simplified version from [this Qt tutorial](http://zetcode.com/tutorials/pyqt4/firstprograms)):

# In[5]:


import sys
from PyQt4 import QtGui, QtCore

class SimpleWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)

        self.setGeometry(300, 300, 200, 80)
        self.setWindowTitle('Hello World')

        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)

        self.connect(quit, QtCore.SIGNAL('clicked()'),
                     self, QtCore.SLOT('close()'))


# And now we can instantiate it:

# In[6]:


app = QtCore.QCoreApplication.instance()
if app is None:
    app = QtGui.QApplication([])

sw = SimpleWindow()
sw.show()

from IPython.lib.guisupport import start_event_loop_qt4
start_event_loop_qt4(app)


# But IPython still remains responsive:

# In[7]:


10+2


# The `%gui` magic can be similarly used to control Wx, Tk, glut and pyglet applications, [as can be seen in our examples](https://github.com/ipython/ipython/tree/master/examples/lib).

# ## Embedding IPython in a terminal application

# In[8]:


get_ipython().run_cell_magic('writefile', 'simple-embed.py', "# This shows how to use the new top-level embed function.  It is a simpler\n# API that manages the creation of the embedded shell.\n\nfrom IPython import embed\n\na = 10\nb = 20\n\nembed(header='First time', banner1='')\n\nc = 30\nd = 40\n\nembed(header='The second time')\n")


# The example in kernel-embedding shows how to embed a full kernel into an application and how to connect to this kernel from an external process.

# ## Logging terminal sessions and transitioning to a notebook

# The `%logstart` magic lets you log a terminal session with various degrees of control, and the `%notebook` one will convert an interactive console session into a notebook with all input cells already created for you (but no output).