[Python-bugs-list] [ python-Bugs-632323 ] Tkinter (?) refct (?) bug

[noreply@sourceforge.net]

Bugs item #632323, was opened at 2002-11-01 14:39
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=632323&group_id=5470

Category: Tkinter
Group: Python 2.2.1
Status: Open
Resolution: None
Priority: 5
Submitted By: L. Peter Deutsch (lpd)
Assigned to: Nobody/Anonymous (nobody)
Summary: Tkinter (?) refct (?) bug

Initial Comment:
The following program incorrectly produces a blank canvas:

#!/usr/bin/env python

from Tkinter import *

class Me(Canvas):

    def init1(self):
        return BitmapImage(foreground = '#ff0000',
                           background = '#00ff00',
                           data = """\
#define t_width 8
#define t_height 8
static unsigned char t_bits[] = {
   0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x3c, 0x3c};
""",

                           maskdata = """\
#define t_width 8
#define t_height 8
static unsigned char t_bits[] = {
   0x18, 0x3c, 0x7e, 0xff, 0xff, 0x7e, 0x3c, 0x18};
""")

    def init2(self, image):
        self.create_image(32, 32, anchor = NW, image =
image)

self = Me()
self.pack(expand = 1, fill = BOTH)
self.init2(self.init1())
#img = self.init1()
#self.init2(img)
self.mainloop()

----------------

However, the following program correctly draws a small
red-and-green icon:

#!/usr/bin/env python

from Tkinter import *

class Me(Canvas):

    def init1(self):
        return BitmapImage(foreground = '#ff0000',
                           background = '#00ff00',
                           data = """\
#define t_width 8
#define t_height 8
static unsigned char t_bits[] = {
   0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x3c, 0x3c};
""",

                           maskdata = """\
#define t_width 8
#define t_height 8
static unsigned char t_bits[] = {
   0x18, 0x3c, 0x7e, 0xff, 0xff, 0x7e, 0x3c, 0x18};
""")

    def init2(self, image):
        self.create_image(32, 32, anchor = NW, image =
image)

self = Me()
self.pack(expand = 1, fill = BOTH)
#self.init2(self.init1())
img = self.init1()
self.init2(img)
self.mainloop()

----------------

The two programs are identical except that one of them
assigns the BitmapImage to a variable rather than
passing it directly as an argument.

Python 2.2.1, OS = Linux version 2.4.18-3
(bhcompile@daffy.perf.redhat.com) (gcc version 2.96
20000731 (Red Hat Linux 7.3 2.96-110)) #1 Thu Apr 18
07:37:53 EDT 2002


----------------------------------------------------------------------

>Comment By: L. Peter Deutsch (lpd)
Date: 2002-11-01 20:32

Message:
Logged In: YES 
user_id=8861

Comment #1: This bug is still there in Python 2.2.2.

Comment #2: Using a variable isn't the whole story. The bug
also manifests if I define:

    def init(self):
        img = self.init1()
        self.init2(img)

and then have the calling program invoke self.init().


----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=632323&group_id=5470