experimenting_with_python.py

'''
Created on Oct 1, 2015

@author: fawix
'''

from gi.repository import Gtk, Gdk
import os, sys, cairo, math, random

class FunNewStuff:

    start_x_cood  = 0 #starting X
    start_y_cood  = 0 #starting Y
    ending_x_cood = 0 #ending X
    ending_y_cood = 0 #ending Y
    firstClick = False

    def __init__(self):
        
        self.window = Gtk.Window()
        self.window.set_title ("Drawing Stuff")
        self.window.set_border_width(0)
        self.window.set_default_size(400, 200)
            
        self.window.connect_after('destroy', self.destroy)
        self.window.connect('key-press-event', self.on_key_function)
        
        self.create_vbox()
        self.window.add(self.vbox)
                                     
        self.area = Gtk.DrawingArea()
        self.area.connect('draw', self.on_draw)
        self.window.connect("motion_notify_event", self.on_motion_notify_event)
        self.window.connect("button_press_event", self.on_button_press_event)
        self.area.set_events(Gdk.EventType.MOTION_NOTIFY)
        #http://lazka.github.io/pgi-docs/Gdk-3.0/classes/Window.html#Gdk.Window.set_event_compression
        self.vbox.add (self.area)
        self.area.props.expand = True
        self.window.show_all ()
        
        self.window.fullscreen()              
        self.window.set_opacity(0.5)
        
    def on_motion_notify_event (self, widget, event):
        print("on_motion_notify_event")
        if event.is_hint:
            x, y, state = event.window.get_pointer()
        else:
            x = event.x
            y = event.y
            state = event.state
        
        if self.firstClick :
            self.ending_x_cood = x
            self.ending_y_cood = y
            self.draw_rectangle(self, widget, self.start_x_cood, self.start_y_cood, self.ending_x_cood, self.ending_y_cood)
  
        return True
        
    def on_button_press_event (self, widget, event):
        print("on_button_press_event x:{0} y:{1} - button: {2}".format(event.x, event.y, event.button))
        print("on_button_press_event {0}".format(event.type))
        
        if not self.firstClick and event.button == 1 :
            self.firstClick = True
            self.start_x_cood = event.x
            self.start_y_cood = event.y
            self.draw_rectangle(self, widget, event.x, event.y , event.x, event.y)

        
    def on_key_function (self, widget, event):
        if event.keyval == Gdk.KEY_Escape :
            self.on_cancel_action()
        
    def create_vbox (self):
        
        self.vbox = Gtk.Box()
        self.vbox.set_spacing (0)
        self.vbox.set_orientation (Gtk.Orientation.VERTICAL)
        
    def on_cancel_action (self):                
        self.window.unfullscreen()
        self.window.set_opacity(1)
        self.window.show_all()
        
    #self | widget = drawing area | cr = cairo Context
    def on_draw(self, widget, cr):  
        #print ("drawing")
        cr.set_source_rgba(0.5, 0.5, 0.5, 0.5)
        cr.rectangle(0, 0, widget. get_allocated_width(), widget. get_allocated_height())
        cr.fill()
        
        cr.set_source_rgba(1, 1, 1, 1)
        cr.rectangle(50, 50, 100, 100)
        cr.fill()
        
    def draw_rectangle (self, widget, start_x_cood, start_y_cood, ending_x_cood, ending_y_cood, **kwargs):
        print ("draw_retangle")
        cr = cairo.Context()
        cr.set_source_rgba(1, 1, 1, 1)
        cr.rectangle(start_x_cood, start_y_cood, ending_x_cood, ending_y_cood)
        cr.fill()
        
    def reset (self):
        self.start_x_cood = 0
        self.start_y_cood = 0
        self.ending_x_cood = 0
        self.ending_y_cood = 0
        self.firstClick = False
        
    def destroy(self, window):
        print("terminated")
        Gtk.main_quit()
        
    
def main () :
    win = FunNewStuff()
    Gtk.main()
    
if __name__ == "__main__":
    sys.exit(main())