August 8th, 2004, 01:28 AM
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Contributing User
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Join Date: Jan 2004
Posts: 84
Time spent in forums: 8 h 7 m
Reputation Power: 5
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I saw your post yesterday, but didn't have time to give you an answer then. seeing as you still haven't received help, I hacked up this little example of a syntax highlighting Text widget. You are correct in assuming you need to use tags. My code binds any key press to a function that analyses the current line of code and highlights python keywords and integers. You could expand on it to do class/function names and strings. It also needs to be fixed up so that if you were to load a script in an editor environment (this is just a text window without any other features) it would highlight the whole thing. Just a few ideas to play with 
Code:
from Tkinter import *
import keyword
from string import ascii_letters, digits, punctuation, join
class SyntaxHighlightingText(Text):
tags = {'kw': 'orange',
'int': 'red'}
def __init__(self, root):
Text.__init__(self, root)
self.config_tags()
self.characters = ascii_letters + digits + punctuation
self.bind('<Key>', self.key_press)
def config_tags(self):
for tag, val in self.tags.items():
self.tag_config(tag, foreground=val)
def remove_tags(self, start, end):
for tag in self.tags.keys():
self.tag_remove(tag, start, end)
def key_press(self, key):
cline = self.index(INSERT).split('.')[0]
lastcol = 0
char = self.get('%s.%d'%(cline, lastcol))
while char != '\n':
lastcol += 1
char = self.get('%s.%d'%(cline, lastcol))
buffer = self.get('%s.%d'%(cline,0),'%s.%d'%(cline,lastcol))
tokenized = buffer.split(' ')
self.remove_tags('%s.%d'%(cline, 0), '%s.%d'%(cline, lastcol))
start, end = 0, 0
for token in tokenized:
end = start + len(token)
if token in keyword.kwlist:
self.tag_add('kw', '%s.%d'%(cline, start), '%s.%d'%(cline, end))
else:
for index in range(len(token)):
try:
int(token[index])
except ValueError:
pass
else:
self.tag_add('int', '%s.%d'%(cline, start+index))
start += len(token)+1
if __name__ == '__main__':
root = Tk()
sht = SyntaxHighlightingText(root)
sht.pack()
root.mainloop()
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