#  EarthAndMoonQt.py  (c) Kari Laitinen

#  http://www.naturalprogramming.com

#  2009-11-03  File created.
#  2009-11-03  Last modification.

#  This program shows, among other things, how texts can be drawn
#  with different fonts.

import sys
from PyQt4 import QtGui, QtCore

class EarthAndMoonWindow( QtGui.QWidget ) :

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

      self.setGeometry( 300, 300, 600, 400 )
 
      self.setWindowTitle( "BALLS DEPICTING EARTH AND MOON" )

      self.large_font  = QtGui.QFont( "Serif", 20, QtGui.QFont.Bold )
      # 'True' as last parameter specifies that the font is italic.
      self.italic_font = QtGui.QFont( "Serif", 12, QtGui.QFont.Normal, True )
      self.bold_italic_font = QtGui.QFont( "Serif", 10, QtGui.QFont.Bold, True )


   def paintEvent( self, event ) :
   
      painter = QtGui.QPainter()
      painter.begin( self )
      
      #  We must set a brush in order to fill an ellipse with a color.
      painter.setBrush( QtCore.Qt.green )
      painter.drawEllipse( 30, 30, 212, 212 )  # Earth
      
      painter.setBrush( QtCore.Qt.blue )
      painter.drawEllipse( 400, 100, 58, 58 )  # Moon
      
      painter.setFont( self.large_font )
      painter.drawText( 100, 270, "Earth" )
      painter.drawText( 400, 190, "Moon" )
      
      painter.setFont( self.italic_font )

      painter.drawText( 30, 300, "Equatorial radius: 6380 km, 3960 miles" )
      painter.drawText( 350, 220, "Radius: 1740 km, 1080 miles" ) 
      
      painter.setFont( self.bold_italic_font ) ;
      painter.drawText( 200, 330, "Mean distance between Earth and Moon is" )
      painter.drawText( 200, 345, "384 400 kilometers, 238 860 miles" ) 
      painter.end()


this_application = QtGui.QApplication( sys.argv )
application_window = EarthAndMoonWindow()
application_window.show()
this_application.exec_()