lern-tracking-system/raspberry-pi/gui/logScreen.py

import tkinter as tk
from tkinter.ttk import Progressbar

import logHandler

class LogScreen(tk.Frame):
  def __init__(self, root):
    self.root = root
    tk.Frame.__init__(self, root)

    self.log_handler = logHandler.get_log_handler()

    self.text = tk.Frame(self,relief="sunken",borderwidth=1)
    self.text.pack(expand=True,fill=tk.BOTH)

    self.disable_refresh = False

    self.y_scroll = tk.Scrollbar(self.text, width=32)
    self.y_scroll.pack(side="right", fill="y")

    self.x_scroll = tk.Scrollbar(self.text, orient='horizontal', width=32)
    self.x_scroll.pack(side="bottom", fill="x")

    self.textfield = tk.Listbox(self.text, yscrollcommand=self.y_scroll.set, xscrollcommand=self.x_scroll.set)
    self.textfield.pack(side="left",expand=True, fill=tk.BOTH)

    self.y_scroll.config(command=self.textfield.yview)
    self.x_scroll.config(command=self.textfield.xview)

    self.quit_button = tk.Button(self, text="Close", command=self.close, height=2, width = 10)
    self.quit_button.pack(side="right", fill="both")

    self.disable_refresh_button = tk.Button(self,text="disable refreshing", command=self.toggle_refreshing, height=2, width=20, relief="raised", bg="green", activebackground="#00dd00", fg="white")
    self.disable_refresh_button.pack(side="right", fill="both")

    for element in self.log_handler.get_log_list():
      self.textfield.insert(tk.END, element)
    self.log_handler.get_new_items()

    root.bind('<Escape>', self.close)

  def update(self):
    if not self.root.winfo_exists():
      return
    if not self.disable_refresh:
      lines = self.log_handler.get_new_items()
      if lines:
        for element in lines:
          self.textfield.insert(tk.END, element)
        self.textfield.see("end")

  def close(self):
    if self.root.winfo_exists():
      self.root.destroy()

  def toggle_refreshing(self):
    self.disable_refresh = not self.disable_refresh
    if self.disable_refresh:
      self.disable_refresh_button.config(text="Enable refresh", relief="sunken", background="#ee0000", activebackground="#ff0000")
    else:
      self.disable_refresh_button.config(text="Disable refresh", relief="raised", background="green", activebackground="#00dd00")