# move_object_tk.py3
# imports every file form tkinter
from tkinter import *
 
class GFG:
  def __init__(self, master = None):
    self.master = master
    print("in __init__")
    # to take care movement in x direction
    self.x = 3 # amount to move
    # to take care movement in y direction
    self.y = 3 # amount to move
    self.count = 0
    self.time_step = 100
    #
    # canvas object to create shape
    self.canvas = Canvas(master, width=500, height=500)
    # creating rectangle
    self.canvas.create_text(200, 20, text='arrow keys change direction', fill='black')
    self.canvas.create_text(200, 30, text='right click=bigger step, left click=smaller step', fill='black')
    self.canvas.create_text(200, 40, text='key + =faster, key -= slower', fill='black')
    self.rectangle = self.canvas.create_rectangle(
                         100, 100, 150, 150, fill = "red")
    self.canvas.pack()
    #
    # calling class's movement method to
    # move the rectangle
    print("self.movement called")
    self.movement()

  # end _init_
    
  def movement(self):
    # This is where the move() method is called
    # This moves the rectangle to x, y coordinates
    print("in def movement, count=",self.count," x=",self.x," y=",self.y," t=",self.time_step)
    self.count = self.count + 1
    if self.count > 50:
      self.count = 0
      self.x = - self.x  # reverse direction
      self.y = - self.y
      #self.rectangle = self.canvas.create_rectangle(
      #                   100, 100, 150, 150, fill = "blue")

    # end if
    self.canvas.move(self.rectangle, self.x, self.y)
    self.canvas.after(self.time_step, self.movement) # now slower, was 20

  # end movement
  
  # for motion in negative x direction
  def left(self, event):
    print(event.keysym)
    self.x = -5  # amount to move
    self.y = 0

  # end left
  
  # for motion in positive x direction
  def right(self, event):
    print(event.keysym)
    self.x = 5  # amount to move
    self.y = 0

  # end right
  
  # for motion in positive y direction
  def up(self, event):
    print(event.keysym)
    self.x = 0
    self.y = -5  # amount to move

  # end up

  # for motion in negative y direction
  def down(self, event):
    print(event.keysym)
    self.x = 0
    self.y = 5  # amount to move

  # end down

  # for motion to go faster, shorter time
  def faster(self, event):
    print("speed faster")
    self.time_step = self.time_step /2

  # end faster

  # for motion to go faster, shorter time
  def slower(self, event):
    print("speed slower")
    self.time_step = self.time_step * 2

  # end slower

  # for step size smaller
  def mouseB3press(self, event): # right
    print("right 3 mouse pressed")
    if self.x > 0 :
      self.x = self.x - 2 # change amount to move each time

    # end if
    if self.x < 0 :
      self.x = self.x + 2

    # end if
    if self.y > 0 :
      self.y = self.y - 2  # amount to move

    # end if
    if self.y < 0 :
      self.y = self.y + 2  # amount to move

    # end if

  # end mouseB3press

  # for step size bigger
  def mouseB1press(self, event): # left
    print("left 1 mouse pressed")
    if self.x > 0 :
      self.x = self.x + 2

    # end if
    if self.x < 0 :
      self.x = self.x - 2

    # end if
    if self.y > 0 :
      self.y = self.y + 2  # amount to move

    # end if
    if self.y < 0 :
      self.y = self.y - 2  # amount to move

    # end if

  # end mouseB1press

# end class GFG

if __name__ == "__main__":
  # object of class Tk, responsible for creating
  # a tkinter toplevel window
  print("move_object_tk.py3 running")
  master = Tk()
  gfg = GFG(master)
  #
  # This will bind arrow keys to the tkinter
  # toplevel which will navigate the image or drawing
  master.bind("<KeyPress-Left>", lambda e: gfg.left(e))
  master.bind("<KeyPress-Right>", lambda e: gfg.right(e))
  master.bind("<KeyPress-Up>", lambda e: gfg.up(e))
  master.bind("<KeyPress-Down>", lambda e: gfg.down(e))
  master.bind("<KeyPress-KP_Add>", lambda e: gfg.faster(e))
  master.bind("<KeyPress-KP_Subtract>", lambda e: gfg.slower(e))
  # This will bind mouse press to the tkinter
  master.bind('<ButtonPress-1>', lambda e: gfg.mouseB1press(e))
  master.bind('<ButtonPress-3>', lambda e: gfg.mouseB3press(e))
  #   
  # Infinite loop breaks only by interrupt, click #
  mainloop()

# end main