#  ClickingsGTK.py  (c) Kari Laitinen

#  http://www.naturalprogramming.com

#  2006-08-23  File created.
#  2009-02-11  Last modification.

#  This program demonstrates how we can find out when a mouse
#  button is pressed. The program prints the position and the
#  coordinates where mouse button was pressed down.

#  This program works in the same way as ClickingsApplet.java.
#  If you want to see a more Java-like version of this program
#  please read the file ClickingsGTKArray.py.

import gtk
 
class ClickingsApplication :

   def __init__( self ) :

      self.application_window = gtk.Window( gtk.WINDOW_TOPLEVEL )
      self.application_window.set_title( "CLICK THIS WINDOW WITH THE MOUSE" )
      self.application_window.connect( "destroy", self.exit_this_application )

      self.application_window.set_size_request( 600, 400 )
      self.drawing_area = gtk.DrawingArea()

      self.application_window.add( self.drawing_area )

      self.drawing_area.connect( "expose-event", self.drawing_area_exposed )

      self.drawing_area.connect( "button_press_event",
                                 self.mouse_button_pressed )

      self.drawing_area.set_events(gtk.gdk.EXPOSURE_MASK
                                 | gtk.gdk.BUTTON_PRESS_MASK )

      self.drawing_area.show()
      self.application_window.show()

      self.window_width, self.window_height  =  \
                                  self.application_window.get_size()

      self.list_of_clicking_coordinates  =  []


   def mouse_button_pressed( self, widget, event ) :

      self.list_of_clicking_coordinates.append( ( int( event.x ),
                                                  int( event.y ) ) )
      self.drawing_area.queue_draw()

      return True



   def drawing_area_exposed( self, area, event ) :

      graphics_context  =   \
            self.drawing_area.get_style().fg_gc[gtk.STATE_NORMAL]

      this_drawable  =  self.drawing_area.window

      coordinates_as_text  =  self.drawing_area.create_pango_layout( "" )

      for clicking_coordinates  in  self.list_of_clicking_coordinates :

         #  Below 0 refers to the x coordinate and 1 refers to
         #  the y coordinate. These are stored in a tuple whose length is 2.

         this_drawable.draw_arc( graphics_context, True,
                                 clicking_coordinates[ 0 ] - 3,
                                 clicking_coordinates[ 1 ] - 3,
                                 6, 6, 0, 360*64 )

         coordinates_as_text.set_text( "(%d, %d)"  %  clicking_coordinates )

         this_drawable.draw_layout( graphics_context,
                                    clicking_coordinates[ 0 ] + 7,
                                    clicking_coordinates[ 1 ] - 7,
                                    coordinates_as_text )
      return True

   def run( self ) :

      gtk.main()

   def exit_this_application( self, widget, data=None ) :

      gtk.main_quit()

if __name__ == "__main__":
   this_application  =  ClickingsApplication()
   this_application.run()

#  The development of this program has been sponsored by
#  Nokia Multimedia.