【Part4】Tkinterでホットキーを設定しよう【CustomTkinterでメモ帳を作ろう】

Tkinter/CustomTkinterでホットキーを実装する方法

        self.bind("<Control-n>", self.newfile)
        self.bind("<Control-Shift-s>", self.saveas)
        self.bind("<Control-s>", self.onsave)
        self.bind("<Control-o>", self.openfile)
        self.bind("<Control-N>", self.newfile)
        self.bind("<Control-Shift-S>", self.saveas)
        self.bind("<Control-S>", self.onsave)
        self.bind("<Control-O>", self.openfile)

こうみればわかりますが、CapsLockされているとき対策のために大文字でもバインドしなければいけないんですよね...

import tkinter as tk
from tkinter import filedialog, messagebox
import customtkinter as ctk

class MyFrame(ctk.CTk):
    def __init__(self):
        super().__init__()
        self.title("メモ帳 - 新規")
        self.geometry("900x600")
        self.nowfile = ""

        self.menubar = tk.Menu(self)
        filemenu = tk.Menu(self.menubar, tearoff=0)
        filemenu.add_command(label="新規 (Ctrl+N)", command=self.newfile)
        filemenu.add_command(label="開く... (Ctrl+O)", command=self.openfile)
        filemenu.add_command(label="上書き保存... (Ctrl+S)", command=self.onsave)
        filemenu.add_command(label="名前を付けて保存... (Ctrl+Shift+S)", command=self.saveas)
        filemenu.add_command(label="終了 (Alt+F4)", command=self.quit)
        self.menubar.add_cascade(label="ファイル", menu=filemenu)
        self.config(menu=self.menubar)

        self.bind("<Control-n>", self.newfile)
        self.bind("<Control-Shift-s>", self.saveas)
        self.bind("<Control-s>", self.onsave)
        self.bind("<Control-o>", self.openfile)
        self.bind("<Control-N>", self.newfile)
        self.bind("<Control-Shift-S>", self.saveas)
        self.bind("<Control-S>", self.onsave)
        self.bind("<Control-O>", self.openfile)

        self.sbf = ctk.CTkFrame(self,height=24, corner_radius=0)
        self.sbf.pack(side="bottom", fill="x")
        self.statusbar1 = ctk.CTkLabel(self.sbf, text="1行、0列", anchor="e", padx=10)
        self.statusbar1.pack(side="right")
        self.statusbar2 = ctk.CTkLabel(self.sbf, text="UTF-8", anchor="e", padx=10)
        self.statusbar2.pack(side="right")

        self.textbox = ctk.CTkTextbox(self, wrap="none")
        self.textbox.pack(fill="both", expand=True)

        self.textbox.bind("<KeyRelease>", self.updatestatus)
        self.textbox.bind("<ButtonRelease-1>", self.updatestatus)
    
    def newfile(self, event=None):
        self.textbox.delete("1.0", tk.END)
        self.updatestatus()
        self.nowfile = ""
        self.title("メモ帳 - 新規")
    
    def openfile(self, event=None):
        file = filedialog.askopenfilename()
        if file:
            f = open(file, "r", encoding="utf-8")
            self.textbox.delete("1.0", tk.END)
            self.textbox.insert("1.0", f.read())
            self.updatestatus()
            f.close()
            self.title("メモ帳 - " + file)
            self.nowfile = file
    
    def onsave(self, event=None):
        if self.nowfile == "":
            self.saveas()
        else:
            f = open(self.nowfile, "w", encoding="utf-8")
            f.write(self.textbox.get("1.0", tk.END))
            f.close()
            self.title("メモ帳 - " + self.nowfile)
    
    def saveas(self, event=None):
        file = filedialog.asksaveasfilename(defaultextension="txt")
        if file:
            f = open(file, "w", encoding="utf-8")
            f.write(self.textbox.get("1.0", tk.END))
            f.close()
            self.title("メモ帳 - " + file)
            self.nowfile = file
    
    def updatestatus(self, event=None):
        line,col = self.textbox.index(tk.INSERT).split(".")
        self.statusbar1.configure(text=str(line) + "行、"+ str(col) + "列")

if __name__ == "__main__":
    app = MyFrame()
    app.mainloop()

だいぶ長くなりましたが、まだ不十分ですね。次回に続きます。