Tkinter advanced: pysnippets 1.3 – delete files

Pysnippets is an app that makes you make order in your memos or to create an ebook that we are creating step by step in this tutorial using tkinter, the built in module to make GUI in tkinter. We are using it to collect python snippets, but it can be used to make ebooks, web pages. These features are not here yet, but will come soon. This time we are going to add a way to delete the files we have.

# tkinter advanced: pybookgen

'''
Started: 03.12.2020 - v. 0.1

- chapter
    - chapter1.txt
    - chapter1img1.png

GUI
---------------------------------
PyEbookGen
---------------------------------
 chapter1  | text
           |

'''
# module for the gui
import tkinter as tk
# module to check files
import os
from tkinter import simpledialog
from tkinter import messagebox


class Win:
    def __init__(self, title, version, extension):
        self.extension = extension
        self.root = tk.Tk()
        self.root.title(f"{title}.{version}")
        self.window()
        self.controls()


    def save(self):
        try:
            with open(f"snippets/{self.filename}", "w") as file:
                file.write(self._text.get("0.0", tk.END))
        except:
            self.popup("Message", "Nothing selected")


    def delete(self):
        try:
            self.filename = self._lbx.get(self._lbx.curselection())
            print(self.filename)
            ask = messagebox.askyesno(title="Delete this file",message=f"You will delete {self.filename}")
            print(ask)
            if ask:
                os.remove(f"snippets/{self.filename}")
                self.showlistitems()
        except:
            self.popup("Beware", "You must select the file to delete")

    def input_filename(self,
        title="Enter a new name",
        sentence="Do not put the extension"):

        #tk.Tk().withdraw()
        name = simpledialog.askstring(title, sentence)
        try:
            if name != "":
                return name + ".py"
        except TypeError:
            return ""

    def popup(self,
        title="",
        sentence=""):

        tk.Tk().withdraw()
        name = messagebox.showinfo(
                title=title,
                message=sentence)

    def controls(self):
        self.root.bind("<Control-n>", self.newfile)
        self._lbx.bind("<<ListboxSelect>>", self.showcontent)
        self._text.bind("<Control-s>", lambda x: self.save())

    def newfile(self, evt):
        newfilename = self.input_filename()
        if newfilename != "":
            with open(f"snippets/{newfilename}", "w") as file:
                pass
            self._lbx.insert(0, newfilename)

    def newfile2(self):
        newfilename = self.input_filename()
        if newfilename != "":
            with open(f"snippets/{newfilename}", "w") as file:
                pass
            self._lbx.insert(0, newfilename)

    def showlistitems(self):
        self._lbx.delete(0, tk.END)
        for file in os.listdir("snippets"):
            if file.endswith(self.extension):
                self._lbx.insert(0, file)
    
    def window(self):
        "Contains all the widgets"
        
        def frame0():
            "Contains the text"
            self._frame0 = tk.Frame(self.root, bg="gold")
            self._frame0.grid(column=0, columnspan=2, row=0)
        
        def frame():
            "Contains the list of chapter names in listbox"
            self._frame = tk.Frame(self.root, bg="gray")
            self._frame.grid(column=0, row=1,
                sticky="NESW")
            self._frame.grid_columnconfigure(0, weight=0)
        
        def frame2():
            "Contains the text"
            self._frame2 = tk.Frame(self.root, bg="gold")
            self._frame2.grid(column=1, row=1)
        
        def label_banner():
            img = tk.PhotoImage(file="snippets/banner.png")
            self.lb_banner = tk.Label(self._frame0, image=img, bg="yellow")
            self.lb_banner.image = img
            self.lb_banner.grid(column=0, columnspan=2, row=0)

        def listbox():
            "The book chapter name list goes here"
            self._lbx = tk.Listbox(self._frame, bg="yellow")
            self._lbx.grid(
                column=0,
                row=0,
                sticky="NESW"
                ) # adapt the listbox to the frame
            
            self.showlistitems()

        def button(text, column, row, command):
            "The book chapter name list goes here"
            but1 = tk.Button(self._frame,
                text=text,
                bg="yellow",
                command=command)
            but1.grid(
                column=column,
                row=row,
                sticky="NESW"
                ) # adapt the listbox to the frame

        def text():
            "Contains the text of selected chapter in listbox"
            self._text = tk.Text(self._frame2)
            self._text.grid(column=1, row=0)
            
        def widgets_order():
            "The widgets on the screen"
            frame0()
            frame()
            frame2()
            label_banner()
            listbox()
            button("save", 0, 1, self.save)
            button("new", 0, 2, self.newfile2)
            button("delete", 0, 3, self.delete)
            text()

        widgets_order()

    def showcontent(self, evt):
        try:
            filenum = self._lbx.curselection()
            self.filename = self._lbx.get(filenum)
            with open(f"snippets/{self.filename}") as file:
                content = file.read()
            self._text.delete("0.0", tk.END)
            self._text.insert(tk.END, content)
        except:
            pass


def create_chapters_folder():
    "Create the folder for the snippets if not exists"
    if "snippets" not in os.listdir():
        os.mkdir("snippets")
        print("Created a folder named chatpters")

def console_intro():
    print("""
Save your chapters in chapters folder
""")

# ================ main ============
if __name__ == "__main__":
    console_intro()
    create_chapters_folder()
    ver = "0.1"
    win = Win("PySnippets", "0.01", extension=".py")
    win.root.mainloop()