#!/usr/bin/env python

#from gi.repository import Gtk
#import pygtk
#import gtk

try:
 	import pygtk
  	pygtk.require("2.0")
except:
  	pass
try:
	import gtk
except:
	sys.exit(1)
	
	
class reuse_init(object):


	def make_label(self, text):
		label = gtk.Label(text)
		label.set_use_underline(True)
		label.set_alignment(1.0, 0.5)
		label.show()
		return label

	def make_slider_and_spinner(self, init, min, max, step, page, digits):
		controls = {'adj':gtk.Adjustment(init, min, max, step, page), 'slider':gtk.HScale(), 'spinner':gtk.SpinButton()}
		controls['slider'].set_adjustment(controls['adj'])
		controls['slider'].set_draw_value(False)
		controls['spinner'].set_adjustment(controls['adj'])
		controls['spinner'].set_digits(digits)
		controls['slider'].show()
		controls['spinner'].show()
		return controls	
	
	
class ProgrammaGTK(reuse_init):
	

	def __init__(self):
		
		self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
		self.window.connect("destroy", self.on_window_destroy)
		self.window.set_title("FFmpeg video resize calculator")
		self.window.set_position(gtk.WIN_POS_CENTER)
		self.window.set_border_width(30)
		self.window.set_default_size(500,-1)
		#----------------------------------
		# -------- table ---------------
		self.table = gtk.Table(3, 3, True)
		self.table.set_homogeneous(False)
		self.table.set_row_spacings(8)
		self.table.set_col_spacings(8)
		#self.window.add(self.table)
		#------------------------------------		
		# ------------------------------------
		self.box1 = gtk.ComboBox()
		self.liststore = gtk.ListStore(int,str)
		self.liststore.append([0,"W"])
		self.liststore.append([1, "H"])
		self.box1.set_model(self.liststore)
		self.cell = gtk.CellRendererText()
		self.box1.pack_start(self.cell, True)
		self.box1.add_attribute(self.cell, 'text', 1)
		self.box1.set_active(0)
		self.table.attach(self.box1, 0, 1, 0, 1)
		self.box1.connect("changed", self.on_button1_clicked)
		#------------------------------------
		self.box2 = gtk.ComboBox()
		self.liststore2 = gtk.ListStore(int,str)
		self.liststore2.append([0,"16/9"])
		self.liststore2.append([1, "4/3"])
		self.box2.set_model(self.liststore2)
		self.cell = gtk.CellRendererText()
		self.box2.pack_start(self.cell, True)
		self.box2.add_attribute(self.cell, 'text', 1)
		self.box2.set_active(0)
		self.table.attach(self.box2, 0, 1, 1, 2)
		self.box2.connect("changed", self.on_button1_clicked)
		#--------------------------------
		self.labelout = gtk.Label("")
		self.labelout.set_selectable(1)
		#self.table.attach(self.labelout, 0, 3, 2, 3)
		#-----------------------------------------
		self.size_spinner = self.make_slider_and_spinner(702, 200, 2000, 1, 10, 0)
		self.table.attach(self.size_spinner['slider'], 1, 2, 0, 1) 
		self.table.attach(self.size_spinner['spinner'], 2, 3, 0, 1)
		self.size_spinner['slider'].set_size_request(150,-1)
		self.size_spinner['adj'].set_value(702.001) #mettere decimali se no non si vede
		self.size_spinner['adj'].connect("value-changed", self.on_button1_clicked)
		#-------------------------------------------------------
		self.check = gtk.CheckButton("lanczos")
		self.check.connect("toggled", self.on_button1_clicked)
		self.table.attach(self.check, 2, 3, 1, 2)
		#------------------------
		#self.button1 = gtk.Button(label="Calcola")
		#self.button1.connect("clicked", self.on_button1_clicked)
		#self.table.attach(self.button1, 2, 3, 1, 2)
		
		#-- VBox -------------------------
		self.vbox1 = gtk.VBox()
		self.vbox1.set_spacing(12)
		self.vbox1.pack_start(self.table)
		
		self.frame = gtk.Frame()
		self.frame.set_shadow_type(gtk.SHADOW_IN)
		self.frame.set_label("  FFmpeg filter string (select and copy):  ")
		self.ali1 = gtk.Alignment(0.5, 0.5)
		self.ali1.set_padding(12 ,12, 12, 12)
		self.frame.add(self.ali1)
		self.ali1.add(self.labelout)
		
		
		
		self.vbox1.pack_start(self.frame)
		
		self.window.add (self.vbox1)
		#---------------------------------
		self.window.show_all()
		self.calcola()
		
	def on_window_destroy(self, *args):
		    gtk.main_quit(*args)
		    
	def on_button1_clicked(self, button):
		    self.calcola()
		
	def calcola(self):
		numero = self.size_spinner['adj'].get_value()
		
		if ( (int(numero) % 2) != 0):
		  numero = int(numero) + 1 
		else:
		  numero = int(numero)
		
		dar = self.box2.get_active()
		lato = self.box1.get_active() 
				
		if (dar == 1):
		  if (lato == 0):
		    n2 = numero/4*3
		  else:
		    n2 = numero/3*4
		  setdar = ",setdar=4/3,setsar=1/1"
		else:
		  if (lato == 0):
		    n2 = numero/16*9
		  else:
		    n2 = numero/9*16
		  setdar = ",setdar=16/9,setsar=1/1"
		  
		if ( (int(n2) % 2) != 0):
		  n2 = int(n2) + 1 
		else:
		  n2 = int(n2)
		
		stringa = "-vf scale="
		if (lato == 0):
		  stringa = stringa + str(numero) + ":" + str(n2)
		else:
		  stringa = stringa + str(n2) + ":" + str(numero)
		  
		lanc = self.check.get_active()  
		if lanc:
		  stringa = stringa + ":flags=lanczos" + setdar  
		else:
		  stringa = stringa + setdar
		self.labelout.set_text(stringa)
		
	def main(self):
		gtk.main()

		
	

if __name__ == "__main__":
	hwg = ProgrammaGTK()
	gtk.main()