#!/usr/bin/env python
"""
Example of a simple embedded engine in a pyside qt4 application.
"""
from PySide import QtGui, QtCore
from ptk_lib.engine import pyside_engine, eng_misc

class TestApp(QtGui.QApplication):
    def __init__(self):
        QtGui.QApplication.__init__(self, [])

        self.main = QtGui.QMainWindow()
        self.main.show()

        #close the engine when the app exits
        self.connect(self,  QtCore.SIGNAL("lastWindowClosed()"),
                self,  QtCore.SLOT("quit()"))

        #use the __main__ namespace (this file) as the top
        #level. 
        import __main__
        usr_dict = __main__.__dict__ 

        #Alternatively this could be an empty dictionary in which you
        #can store objects you want to expose to the engine.
        usr_dict = {}
        usr_dict['a'] = 1                   #expose objects to the engine.
        usr_dict['b'] = 'test string'       

        #create the engine object
        # parent        -   the parent wxpython object used for events
        # engine label  - The label display to the user on the console tab in 
        #                   PTK
        # userdict  - the local dictionary for the top level namespace    
        self.eng =  pyside_engine.pysideEngine( self, 'pysideTestApp',usr_dict, )

        #connect to the engine disconnect signals
        self.connect(self, QtCore.SIGNAL(   pyside_engine.SigDisconnect), 
                                            self.on_engine_disconnect)

        #connect to a running PTK instance
        port = eng_misc.get_message_port()
        self.eng.connect( 'localhost', port)

    def quit(self):
        #disconnect the engine before quitting.
        self.eng.disconnect()
        QtGui.QApplication.quit()

    def on_engine_disconnect(self):
        print 'Engine disconnected'

app = TestApp()
app.exec_()