adjust size of scrollbar and add toogle refresh button on logscreen

raspberry-pi/gui/logScreen.py

@@ -13,10 +13,12 @@ class LogScreen(tk.Frame):
     self.text = tk.Frame(self,relief="sunken",borderwidth=1)
     self.text.pack(expand=True,fill=tk.BOTH)
 
-    self.y_scroll = tk.Scrollbar(self.text)
+    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')
+    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)
@@ -28,6 +30,9 @@ class LogScreen(tk.Frame):
     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")
+    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()
@@ -37,12 +42,20 @@ class LogScreen(tk.Frame):
   def update(self):
     if not self.root.winfo_exists():
       return
-    lines = self.log_handler.get_new_items()
-    if lines:
-      for element in lines:
-        self.textfield.insert(tk.END, element)
-      self.textfield.see("end")
+    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()
+      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", bg="red")
+    else:
+      self.disable_refresh_button.config(text="Disable refresh", relief="raised", bg="green")