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

from gi.repository import Gtk, Gdk
import os

class App(object):

    main_ui = os.path.join(os.path.dirname(__file__), 'gui.glade')

    def __init__(self):
        self.builder = Gtk.Builder()
        self.builder.add_from_file(self.main_ui)

        self.main_window.connect('destroy', self.quit)
        self.mw_quit_button.connect('clicked', self.quit)

        self.mw_graph_editor_button.connect('clicked', self.show_window, self.graph_editor_window)
        self.graph_editor_window.connect('delete-event', self.hide_window_delete)

        self.ge_menubar_file_quit.connect('activate', self.hide_window, self.graph_editor_window)
        self.ge_toolbar_quit.connect('clicked', self.hide_window, self.graph_editor_window)

        self.ge_drawingarea.connect('motion-notify-event', self.pointer_motion)
        self.ge_drawingarea.connect('motion-notify-event', self.show_coordinates)
        self.ge_drawingarea.connect('draw', self.draw_callback)

        self.path = None
        self.coord = (0, 0)
        self.rgb = (0, 0, 0)

    def __getattr__(self, name):
        obj = self.builder.get_object(name)
        if not obj:
            raise AttributeError("Object {0} has no attribute {1}".format(self, name))
        setattr(self, name, obj)
        return obj

    def draw_callback(self, drawingarea, cr):
        if self.path:
            cr.append_path(self.path)
        cr.line_to(self.coord[0], self.coord[1])
        cr.set_source_rgba(*self.rgb)
        self.path = cr.copy_path_flat()
        cr.stroke()

    def show_coordinates(self, window, event):
        self.ge_mouse_coordinates.set_label('X: {0:.0f} Y: {1:.0f}'.format(event.x, event.y))

    def pointer_motion(self, widget, event):
        if event.state & Gdk.ModifierType.BUTTON1_MASK:
            self.draw(widget, event.x, event.y)
        elif event.state & Gdk.ModifierType.BUTTON3_MASK:
            self.draw(widget, event.x, event.y, True)

    def draw(self, widget, x, y, erase=False):
        self.coord = (x,y)
        if erase:
            self.rgb = (256, 256, 256)
        else:
            self.rgb = (0, 0, 0)
        widget.queue_draw()

    def show_window(self, widget, data):
        data.show_all()

    def hide_window_delete(self, widget, event):
        widget.hide()
        return True

    def hide_window(self, widget, window):
        window.hide()

    def run(self):
        self.main_window.show_all()
        Gtk.main()

    def quit(self, widget=None, data=None):
        self.main_window.destroy()
        Gtk.main_quit()


if __name__ == "__main__":
    app = App()
    app.run()