How to create a Tk bitmap?

[Bob van der Poel]

Grant Edwards wrote:
> 
> I can't figure out how to create a Tk bitmap and then use it in
> a button.  According to the docs I can find, something like this
> ought to work:
> 
>     myBitmap = BitmapImage(name='myBitmap', data='[...]')
> 
>     Button(root,bitmap='myBitmap')
> 
> But, Tk complains that there is no bitmap named 'myBitmap'.  If
> I leave out the "name=" when I create the bitmap and then use
> the name retrieved with str(myBitmap), I get the same error.
> 
> I have managed to get it to work with bitmap data from a file:
> 
>     Button(root,bitmap='@filename')
> 
> But I don't want to have to write the data to a file just so Tk
> can read it back in.  Anybody have any examples of defining new
> bitmaps?
>

The data is an exact copy of the file. For example:

	bobpic = BitmapImage (data = """
	#define bob_width 107 
        #define bob_height 154
	static char bob_bits[] = {

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  
          0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
< blessedly snipped >
	0xff,0xff,0xff}; """ )  

BTW, this applies to tcl/tk as well. Nice, isn't it, to always have
those clear docs to fall back on :).

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  /  )      /         Bob van der Poel
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