simple notepad

Author: Bug-007

Simple Notepad/SimpleNotepad.py

@@ -0,0 +1,199 @@
+import tkinter
+import os
+from tkinter import *
+from tkinter.messagebox import *
+from tkinter.filedialog import *
+
+
+class Notepad:
+    __root = Tk()
+
+    # default window width and height
+    __thisWidth = 300
+    __thisHeight = 300
+    __thisTextArea = Text(__root)
+    __thisMenuBar = Menu(__root)
+    __thisFileMenu = Menu(__thisMenuBar, tearoff=0)
+    __thisEditMenu = Menu(__thisMenuBar, tearoff=0)
+    __thisHelpMenu = Menu(__thisMenuBar, tearoff=0)
+
+    # To add scrollbar
+    __thisScrollBar = Scrollbar(__thisTextArea)
+    __file = None
+
+    def __init__(self, **kwargs):
+
+        # Set icon
+        try:
+            self.__root.wm_iconbitmap("Notepad.ico")
+        except:
+            pass
+
+        # Set window size (the default is 300x300)
+
+        try:
+            self.__thisWidth = kwargs['width']
+        except KeyError:
+            pass
+
+        try:
+            self.__thisHeight = kwargs['height']
+        except KeyError:
+            pass
+
+        # Set the window text
+        self.__root.title("Untitled - Notepad")
+
+        # Center the window
+        screenWidth = self.__root.winfo_screenwidth()
+        screenHeight = self.__root.winfo_screenheight()
+
+        # For left-alling
+        left = (screenWidth / 2) - (self.__thisWidth / 2)
+
+        # For right-allign
+        top = (screenHeight / 2) - (self.__thisHeight / 2)
+
+        # For top and bottom
+        self.__root.geometry('%dx%d+%d+%d' % (self.__thisWidth,
+                                              self.__thisHeight,
+                                              left, top))
+
+        # To make the textarea auto resizable
+        self.__root.grid_rowconfigure(0, weight=1)
+        self.__root.grid_columnconfigure(0, weight=1)
+
+        # Add controls (widget)
+        self.__thisTextArea.grid(sticky=N + E + S + W)
+
+        # To open new file
+        self.__thisFileMenu.add_command(label="New",
+                                        command=self.__newFile)
+
+        # To open a already existing file
+        self.__thisFileMenu.add_command(label="Open",
+                                        command=self.__openFile)
+
+        # To save current file
+        self.__thisFileMenu.add_command(label="Save",
+                                        command=self.__saveFile)
+
+        # To create a line in the dialog
+        self.__thisFileMenu.add_separator()
+        self.__thisFileMenu.add_command(label="Exit",
+                                        command=self.__quitApplication)
+        self.__thisMenuBar.add_cascade(label="File",
+                                       menu=self.__thisFileMenu)
+
+        # To give a feature of cut
+        self.__thisEditMenu.add_command(label="Cut",
+                                        command=self.__cut)
+
+        # to give a feature of copy
+        self.__thisEditMenu.add_command(label="Copy",
+                                        command=self.__copy)
+
+        # To give a feature of paste
+        self.__thisEditMenu.add_command(label="Paste",
+                                        command=self.__paste)
+
+        # To give a feature of editing
+        self.__thisMenuBar.add_cascade(label="Edit",
+                                       menu=self.__thisEditMenu)
+
+        # To create a feature of description of the notepad
+        self.__thisHelpMenu.add_command(label="About Notepad",
+                                        command=self.__showAbout)
+        self.__thisMenuBar.add_cascade(label="Help",
+                                       menu=self.__thisHelpMenu)
+
+        self.__root.config(menu=self.__thisMenuBar)
+
+        self.__thisScrollBar.pack(side=RIGHT, fill=Y)
+
+        # Scrollbar will adjust automatically according to the content
+        self.__thisScrollBar.config(command=self.__thisTextArea.yview)
+        self.__thisTextArea.config(yscrollcommand=self.__thisScrollBar.set)
+
+    def __quitApplication(self):
+        self.__root.destroy()
+
+    # exit()
+
+    def __showAbout(self):
+        showinfo("Notepad", "Mrinal Verma")
+
+    def __openFile(self):
+
+        self.__file = askopenfilename(defaultextension=".txt",
+                                      filetypes=[("All Files", "*.*"),
+                                                 ("Text Documents", "*.txt")])
+
+        if self.__file == "":
+
+            # no file to open
+            self.__file = None
+        else:
+
+            # Try to open the file
+            # set the window title
+            self.__root.title(os.path.basename(self.__file) + " - Notepad")
+            self.__thisTextArea.delete(1.0, END)
+
+            file = open(self.__file, "r")
+
+            self.__thisTextArea.insert(1.0, file.read())
+
+            file.close()
+
+    def __newFile(self):
+        self.__root.title("Untitled - Notepad")
+        self.__file = None
+        self.__thisTextArea.delete(1.0, END)
+
+    def __saveFile(self):
+
+        if self.__file == None:
+            # Save as new file
+            self.__file = asksaveasfilename(initialfile='Untitled.txt',
+                                            defaultextension=".txt",
+                                            filetypes=[("All Files", "*.*"),
+                                                       ("Text Documents", "*.txt")])
+
+            if self.__file == "":
+                self.__file = None
+            else:
+
+                # Try to save the file
+                file = open(self.__file, "w")
+                file.write(self.__thisTextArea.get(1.0, END))
+                file.close()
+
+                # Change the window title
+                self.__root.title(os.path.basename(self.__file) + " - Notepad")
+
+
+        else:
+            file = open(self.__file, "w")
+            file.write(self.__thisTextArea.get(1.0, END))
+            file.close()
+
+    def __cut(self):
+        self.__thisTextArea.event_generate("<<Cut>>")
+
+    def __copy(self):
+        self.__thisTextArea.event_generate("<<Copy>>")
+
+    def __paste(self):
+        self.__thisTextArea.event_generate("<<Paste>>")
+
+    def run(self):
+
+        # Run main application
+        self.__root.mainloop()
+
+    # Run main application
+
+
+notepad = Notepad(width=600, height=400)
+notepad.run()