On Sun, 13 Apr 2008 08:57:29 -0700, skanemupp wrote:
> why is the first program not working? when i click the screen the map
> is not appearing.
>
> the second program works.
>
>
>
> from Tkinter import *
>
> master = Tk()
>
> w = Canvas(master, width=700, height=600)
> w.pack(expand = YES, fill = BOTH)
>
> def mapper():
> mapq = PhotoImage(file = 'C:\Users\saftarn\Desktop\world-map.gif')
> w.create_image(10, 10, image = mapq, anchor = NW)
>
> def key(event):
> print "pressed", repr(event.char)
>
> def callback(event):
> w.focus_set()
> print "clicked at", event.x, event.y
> mapper()
> print 'yo'
> square = w.create_oval(event.x-5,event.y-5,event.x+5,event.y+5,
> fill="black")
>
> w.bind("<Key>", key)
> w.bind("<Button-1>", callback)
> w.pack()
>
>
> mainloop()
Python doesn't know that the Tk side still needs the image and frees the
memory when `mapper()` is done and `mapq` the only name to the `PhotoImage`
instance goes out of scope.
Ciao,
Marc 'BlackJack' Rintsch
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