[Tutor] canvas -> make an object 'seem' to move

[Teresa Stanton]

Hi all:

I am working on a program that will take a .gif and move it from origin, along a path where the mouse clicks.  I understand that the move is simply changing the coordinates.  I can place several .gif's on the canvas, but I would like to make the previous image go away (delete or be removed) and thus far been unable to do that. The example program I wrote simply takes the image and moves it.  I should mention that I've tried 'move() and coord()' to get the object to move, but I am not getting the effect I want.  When I use move in successive steps it just appears at the last move coordinates.  And when I try to use delete, well, it doesn't work, I get an error message.  I should mention that I'm using python25.

Here is my rather early example code:

from Tkinter import *

root = Tk()
root.title("Click me!")

def next_image(event):
    global x, y, photo
    photoId = canvas1.create_image(x, y, image=photo)
    # I realize this isn't the best way to do it, but until I get something working...
    canvas1.create_image(x+10, y, image=photo) # this seems more successful, but the image remains
    canvas1.create_image(x+20, y, image=photo) # after I click.  I don't want the image to remain,
    canvas1.create_image(x+30, y, image=photo) # I actually want to see a slow deliberate movement
    canvas1.create_image(x+40, y, image=photo) # to the final spot.
    canvas1.create_image(x+50, y, image=photo)
    canvas1.create_image(x+60, y, image=photo)
    canvas1.create_image(x+70, y, image=photo)
    #canvas1.move(, 100, 0)
    
image = "DustY1.GIF" # use any gif, this is a cartoon of my dog
photo = PhotoImage(file=image)

# make canvas the size of image1/photo1
width1 = photo.width()
height1 = photo.height()
canvas1 = Canvas(width=width1, height=height1)
canvas1.pack()

# display photo, x, y is center 
x = (width1)/2.0
y = (height1)/2.0
# this is the first image
canvas1.create_image(x, y, image=photo)

canvas1.bind('<Button-1>', next_image)  # bind left mouse click

root.mainloop() 


Thank you for your help!

T
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