# todolist.py

# todolist.py

import Tkinter as tk
class Todo(tk.Frame):
    def __init__(self,parent,tasks=None):
        tk.Frame.__init__(self,parent)
        if not tasks:
            self.tasks=[]
        else:
            self.tasks=tasks
        parent.title("To-Do App v1")
        parent.geometry("300x400")
        todol=tk.Label(self,text="-- Add Items Here --",bg="lightgrey",fg="black",pady=10)
        self.tasks.append(todol)
        for task in self.tasks:
            task.pack(side=tk.TOP,fill=tk.X)
        self.task_creat=tk.Text(self,height=3,bg="white",fg="black")
        self.task_creat.pack(side=tk.BOTTOM,fill=tk.X)
        self.task_creat.focus_set()
        self.task_creat.bind("<Return>",self.add_task)
        self.colour_schemes=[{"bg":"lightgrey","fg":"black"},{"bg":"grey","fg":"white"}]
    def add_task(self,event=None):
        task_text=self.task_creat.get(1.0,tk.END).strip()
        if len(task_text)>0:
            new_task = tk.Label(self,text=task_text,pady=10)
            _,task_style_choice=divmod(len(self.tasks),2)
            my_scheme_choice = self.colour_schemes[task_style_choice]
            new_task.configure(bg=my_scheme_choice["bg"])
            new_task.configure(fg=my_scheme_choice["fg"])
            new_task.pack(side=tk.TOP,fill=tk.X)
            self.tasks.append(new_task)
        self.task_creat.delete(1.0,tk.END)

if __name__=="__main__":
    todo=tk.Tk()
    app=Todo(todo)
    app.pack()
    todo.mainloop()