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Tkinter GUI Programming by Example
book

Tkinter GUI Programming by Example

by David Love
April 2018
Beginner content levelBeginner
340 pages
7h 54m
English
Packt Publishing
Content preview from Tkinter GUI Programming by Example

Using our LineNumbers class

Once again, we simply need to import the LineNumbers class at the top of our texteditor.py file:

from linenumbers import LineNumbers

With that taken care of, we just need to instantiate the class in our __init__ method. Since the code is already set up to apply our custom scrolling to an attribute named lne_numbers, let's delete all references to that attribute in __init__, except for the call to pack at the end, and replace them with this one line:

self.line_numbers = LineNumbers(self, self.text_area, bg="grey", fg="white", width=1)

This ensures that our custom scrolling and event bindings will still apply to this newly created class.

Give the editor another whirl and check out the new dynamic line numbers.

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Publisher Resources

ISBN: 9781788627481Supplemental Content