import tkinter as tk
import tkinter.messagebox as msg
class TextArea(tk.Text):
def __init__(self, master, **kwargs):
super().__init__(**kwargs)
self.master = master
self.config(wrap=tk.WORD) # CHAR NONE
self.tag_configure('find_match', background="yellow")
self.find_match_index = None
self.find_search_starting_index = 1.0
self.bind_events()
def bind_events(self):
self.bind('<Control-a>', self.select_all)
self.bind('<Control-c>', self.copy)
self.bind('<Control-v>', self.paste)
self.bind('<Control-x>', self.cut)
self.bind('<Control-y>', self.redo)
self.bind('<Control-z>', self.undo)
def cut(self, event=None):
self.event_generate("<<Cut>>")
def copy(self, event=None):
self.event_generate("<<Copy>>")
def paste(self, event=None):
self.event_generate("<<Paste>>")
def undo(self, event=None):
self.event_generate("<<Undo>>")
return "break"
def redo(self, event=None):
self.event_generate("<<Redo>>")
return "break"
def select_all(self, event=None):
self.tag_add("sel", 1.0, tk.END)
return "break"
def find(self, text_to_find):
length = tk.IntVar()
idx = self.search(text_to_find, self.find_search_starting_index, stopindex=tk.END, count=length)
if idx:
self.tag_remove('find_match', 1.0, tk.END)
end = f'{idx}+{length.get()}c'
self.tag_add('find_match', idx, end)
self.see(idx)
self.find_search_starting_index = end
self.find_match_index = idx
else:
if self.find_match_index != 1.0:
if msg.askyesno("No more results", "No further matches. Repeat from the beginning?"):
self.find_search_starting_index = 1.0
self.find_match_index = None
return self.find(text_to_find)
else:
msg.showinfo("No Matches", "No matching text found")
def replace_text(self, target, replacement):
if self.find_match_index:
end = f"{self.find_match_index}+{len(target)}c"
self.replace(self.find_match_index, end, replacement)
self.find_search_starting_index = f"{self.find_match_index} linestart"
self.find_match_index = None
def cancel_find(self):
self.find_search_starting_index = 1.0
self.find_match_index = None
self.tag_remove('find_match', 1.0, tk.END)
