[Tutor] Getting current listbox item index and bind it to button (Tkinter)
Ali M
adeadmarshal at gmail.com
Thu Aug 2 16:12:55 EDT 2018
Hi, in my code i have the curselection in my enter_meaning function, and it
works well and prints the result which comes from db to the text widget.
When user searches in entrybox the list lowers down to 1 item, how can i
get the index of that item and bind it to the button so it will print the
result like curselection does but with pressing the Enter key on keyboard?
I tried writing the search_word function and binded it to the button, but
it doesn't work, please help i'm still a beginner.
import sqlite3 as sqlite
import tkinter as tk
from tkinter import ttk
# GUI Widgets
class EsperantoDict:
def __init__(self, master):
master.title("EsperantoDict")
master.iconbitmap("Esperanto.ico")
master.resizable(False, False)
master.configure(background='#EAFFCD')
self.style = ttk.Style()
self.search_var = tk.StringVar()
self.search_var.trace("w", lambda name, index, mode:
self.update_list())
self.style = ttk.Style()
self.style.configure("TFrame", background='#EAFFCD')
self.style.configure("TButton", background='#C6FF02')
self.style.configure("TLabel", background='#EAFFCD')
self.frame_header = ttk.Frame(master, relief=tk.FLAT)
self.frame_header.config(style="TFrame")
self.frame_header.pack(side=tk.TOP, padx=5, pady=5)
self.logo = tk.PhotoImage(file=r'C:\EsperantoDict\eo.png')
self.small_logo = self.logo.subsample(10, 10)
ttk.Label(self.frame_header, image=self.small_logo).grid(row=0,
column=0, stick="ne", padx=5, pady=5, rowspan=2)
ttk.Label(self.frame_header, text='EsperantoDict', font=('Arial',
18, 'bold')).grid(row=0, column=1)
self.frame_content = ttk.Frame(master)
self.frame_content.config(style="TFrame")
self.frame_content.pack()
self.entry_search = ttk.Entry(self.frame_content,
textvariable=self.search_var, width=30)
self.entry_search.bind('<FocusIn>', self.entry_delete)
self.entry_search.bind('<FocusOut>', self.entry_insert)
self.entry_search.grid(row=0, column=0, padx=5)
self.entry_search.focus()
self.entry_search.bind("<KeyRelease>", self.edit_input)
self.button_search = ttk.Button(self.frame_content, text="Search")
self.photo_search =
tk.PhotoImage(file=r'C:\EsperantoDict\search.png')
self.small_photo_search = self.photo_search.subsample(3, 3)
self.button_search.config(image=self.small_photo_search,
compound=tk.LEFT, style="TButton")
self.button_search.grid(row=0, column=2, columnspan=1, sticky='nw',
padx=5)
self.button_search.bind('<Return>', self.search_word)
self.listbox = tk.Listbox(self.frame_content, height=30, width=30)
self.listbox.grid(row=1, column=0, padx=5)
self.scrollbar = ttk.Scrollbar(self.frame_content,
orient=tk.VERTICAL, command=self.listbox.yview)
self.scrollbar.grid(row=1, column=1, sticky='nsw')
self.listbox.config(yscrollcommand=self.scrollbar.set)
self.listbox.bind('<<ListboxSelect>>', self.enter_meaning)
self.textbox = tk.Text(self.frame_content, relief=tk.GROOVE,
width=60, height=30, borderwidth=2)
self.textbox.config(wrap='word')
self.textbox.grid(row=1, column=2, sticky='w', padx=5)
# SQLite
self.db = sqlite.connect(r'C:\EsperantoDict\test.db')
self.cur = self.db.cursor()
self.cur.execute("SELECT Esperanto FROM Words ORDER BY Esperanto")
for row in self.cur:
self.listbox.insert(tk.END, row)
self.update_list()
def update_list(self):
self.listbox.delete(0, tk.END)
search_term = self.search_var.get().lower()
if search_term == 'type to search':
search_term = ''
self.cur.execute("SELECT Esperanto FROM Words WHERE
LOWER(Esperanto) LIKE ? ORDER BY Esperanto",
('%'+search_term+'%',))
for row in self.cur:
item = row[0]
self.listbox.insert(tk.END, item)
for row in range(0, self.listbox.size(), 2):
self.listbox.itemconfigure(row, background="#f0f0ff")
def edit_input(self, tag):
word_to_esp = {'gx': 'ĝ', 'cx': 'ĉ', 'hx': 'ĥ', 'jx': 'ĵ', 'ux':
'ŭ', 'sx': 'ŝ'}
user_input = self.entry_search.get()
user_input = user_input.lower()
for i in word_to_esp:
if user_input.__contains__(i):
a = user_input.replace(i, word_to_esp[i])
return self.search_var.set(a)
# SQLite
def enter_meaning(self, tag):
for index in self.listbox.curselection():
esperanto = self.listbox.get(index)
results = self.cur.execute("SELECT English FROM Words WHERE
Esperanto = ?", (esperanto,))
for row in results:
self.textbox.delete(1.0, tk.END)
self.textbox.insert(tk.END, row[0])
def entry_delete(self, tag):
if self.entry_search.get():
self.entry_search.delete(0, tk.END)
self.textbox.delete(1.0, tk.END)
return None
def entry_insert(self, tag):
if self.entry_search.get() == '':
self.entry_search.insert(0, "Type to Search")
return None
def search_word(self, tag):
esperanto = self.listbox.selection_set(0)
results = self.cur.execute("SELECT English FROM Words WHERE
Esperanto = ?", (esperanto,))
for row in results:
self.textbox.delete(1.0, tk.END)
self.textbox.insert(tk.END, row[0])
def main():
root = tk.Tk()
EsperantoDict(root)
root.mainloop()
if __name__ == '__main__': main()
# db tbl name: Words
# db first field name: Esperanto
# db second field name: English
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