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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

Expanding our demo

Open back up the demo file we created earlier, which shows off the current cursor location. Underneath your update_index function, we will add four more bindings which will be used to practice the utilization of these special strings:

def down_three_lines(event=None):    current_cursor_index = str(text.index(tk.INSERT))    new_position = current_cursor_index + "+3l"    text.mark_set(tk.INSERT, new_position)    return "break"def back_four_chars(event=None):    current_cursor_index = str(text.index(tk.INSERT))    new_position = current_cursor_index + "-4c"    text.mark_set(tk.INSERT, new_position)    return "break"

These two functions demonstrate the use of the +nl and -nc strings.

We get the cursor's current position in the same way as before, ...

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Publisher Resources

ISBN: 9781788627481Supplemental Content