#!/usr/bin/env python
# [SNIPPET_NAME: gtk3 opengl example]
# [SNIPPET_CATEGORIES: opengl]
# [SNIPPET_TAGS: opengl, gtk3]
# [SNIPPET_DESCRIPTION: using gtk3 library lets draw using opengl]
# [SNIPPET_AUTHOR: Oliver Marks ]
# [SNIPPET_LICENSE: GPL]

import sys
from gi.repository import Gtk, GdkX11, Gdk
import cairo


class gui():
    x = 10
    y = 10
    current_x = 0
    current_y = 0
    def __init__(self):
        self.window = Gtk.Window()
        self.window.realize()
        self.window.resize(300, 300)
        self.window.set_resizable(True)
        self.window.set_reallocate_redraws(True)
        self.window.set_title("GTK3 with opengl")
        self.window.connect('delete_event', Gtk.main_quit)
        self.window.connect('destroy', lambda quit: Gtk.main_quit())

        self.fixed_area = Gtk.Layout()
        self.fixed_area.drag_dest_set(Gtk.DestDefaults.ALL, [], Gdk.DragAction.MOVE)
        self.fixed_area.connect("drag-data-received", self.on_drag_data_received)
        self.fixed_area.connect("drag-drop", self.on_drag_data_received)
        self.fixed_area.connect("drag-motion", self.on_drag_data_received)


        self.drawing_area = Gtk.DrawingArea()
        self.drawing_area.set_size_request(50,50)
        self.drawing_area.drag_source_set(Gdk.ModifierType.BUTTON1_MASK, [],Gdk.DragAction.MOVE)

        self.drawing_area.connect("drag-data-get", self.on_drag_data_get)
        self.drawing_area.connect("drag-begin", self.on_drag_data_get)
        self.drawing_area.connect("drag-end", self.on_drag_finish)
        self.drawing_area.connect("motion-notify-event", self.move)

        self.drawing_area.add_events(Gdk.EventMask.TOUCH_MASK)
        self.drawing_area.connect('draw', self.expose)

        self.drawing_area.set_double_buffered(False)

        self.fixed_area.put(self.drawing_area, 1, 1)
        self.window.add(self.fixed_area)
        self.fixed_area.show_all()
        self.window.show_all()

    def on_drag_data_received(self, widget, drag_context, x,y, data,info, time):
        self.x = x
        self.y = y
        print 'drop recieve'
        print x
        print y

    def on_drag_finish(self, widget, event):
        print event
        print dir(event.get_dest_window)
        print event.get_dest_window.get_type()
        self.x = self.current_x
        self.y = self.current_y
        print 'drop finish'

    def on_drag_data_get(self, widget, event):
        print 'drag'

    def on_configure_event(self, widget, event):
        return True

    def move(self, widget, event):
        self.current_x = event.x
        self.current_y = event.y
        print self.x

    def expose(self, widget, context):
        print 'expose'
        print self.x
        context.set_source_rgb(1, 0.5, 1)
        context.move_to(self.x, self.y)
        context.rectangle(self.x, self.y, self.x+40, self.y+40)


        #context.rel_line_to(100, 100)
        context.fill()
        context.save()


def main():
    g = gui()
    Gtk.main()

if __name__ == '__main__':
    main()