Fixed issues #9 #11 #12 #13

e-Paper/RaspberryPi_JetsonNano/python/examples/zerowriter.py

@@ -150,7 +150,8 @@ def __init__(self):
  self.parent_menu = None # used to store the menu that was open before the load menu was opened
  self.server_address = "not active"
  self.cache_file_path = os.path.join(os.path.dirname(__file__), 'data', 'cache.txt')
-
+ self.doReset = False
+
  def initialize(self):
  self.epd.init()
  self.epd.Clear()
@@ -556,6 +557,17 @@ def delete_character(self):
  self.cursor_position = len(self.input_content)
  self.needs_display_update = True
 
+ def delete_previous_word(self):
+ #find the location of the last word in the line
+ last_space = self.input_content.rstrip().rfind(' ', 0, self.chars_per_line)
+ sentence = ""
+ #Remove previous word
+ if last_space >= 0:
+ sentence = self.input_content[:last_space+1]
+ self.input_content = sentence
+ self.cursor_position = len(self.input_content) 
+ #self.needs_display_update = True
+
  def handle_key_up(self, e): 
  if e.name == 'ctrl': #if control is released
  self.control_active = False 
@@ -569,6 +581,7 @@ def save_file(self):
  filename = os.path.join(os.path.dirname(__file__), 'data', f'{timestamp}_{alphanum_prefix}.txt')
  self.previous_lines.append(self.input_content)
  self.save_previous_lines(filename, self.previous_lines)
+ self.save_previous_lines(self.cache_file_path, self.previous_lines)
  self.input_content = self.previous_lines.pop(len(self.previous_lines)-1)
  self.consolemsg("[Saved]")
 
@@ -673,10 +686,10 @@ def handle_key_press(self, e):
  if e.name == "g" and self.control_active: #ctrl+g gmail
  self.gmail_send()
  if e.name == "r" and self.control_active: #ctrl+r slow refresh
- self.epd.init()
-  self.epd.Clear()
- self.update_display()
- 
+ self.doReset = True
+ if e.name == "backspace" and self.control_active: #ctrl+backspace delete prev word
+ self.delete_previous_word()
+
  if e.name == "tab": 
  self.insert_character(" ")
  self.insert_character(" ")
@@ -771,6 +784,12 @@ def exit(self):
  exit(0)
 
  def loop(self):
+ if self.doReset:
+ self.epd.init()
+ self.epd.Clear()
+ self.update_display()
+ self.doReset = False
+
  if self.menu.inputMode and not self.menu.screenupdating:
  self.menu.partial_update()
 
@@ -788,3 +807,6 @@ def run(self):
  self.load_file_into_previous_lines("cache.txt")
  while True:
  self.loop()
+ # This small sleep prevents zerowriter from consuming 100% cpu
+ # This does not negatively affect input delay
+ time.sleep(0.01)