Fixed Arrow Keys crash & Shift Keymapping. Added Backspace going to p…

…revious line.

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

@@ -1,6 +1,7 @@
 # keymaps
 
 # Mapping of characters when Shift is active
+# Note: hyphen is weird, there are at least three different hyphen characters
 shift_mapping = {
  '1': '!',
  '2': '@',
@@ -12,7 +13,9 @@
  '8': '*',
  '9': '(',
  '0': ')',
- '-': '_',
+ chr(45): '_',
+ chr(8208): '_',
+ chr(8722): '_',
  '=': '+',
  '`': '~',
  'q': 'Q',
@@ -46,4 +49,7 @@
  ',': '<',
  '.': '>',
  '/': '?',
-}
+ '[':'{',
+ ']':'}',
+ '\\':'|',
+}

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

@@ -548,6 +548,13 @@ def delete_character(self):
  self.input_content = self.input_content[:self.cursor_position - 1] + self.input_content[self.cursor_position:]
  self.cursor_position -= 1 # Move the cursor back
  #self.needs_input_update = True
+ #No characters on the line, move up to previous line
+ elif len(self.previous_lines) > 0:
+ self.input_content = ""
+ self.input_content = self.previous_lines[len(self.previous_lines)-1]
+ self.previous_lines.pop(len(self.previous_lines)-1)
+ self.cursor_position = len(self.input_content)
+ self.needs_display_update = True
 
  def handle_key_down(self, e):
  if e.name == 'shift': #if shift is released
@@ -637,7 +644,7 @@ def handle_key_press(self, e):
  if e.name == "esc":
  self.show_menu()
 
- if e.name== "down" or e.name== "right" and display_updating==False:
+ if e.name== "down" or e.name== "right" and self.display_updating==False:
  self.scrollindex = self.scrollindex - 1
  if self.scrollindex < 1:
  self.scrollindex = 1
@@ -646,7 +653,7 @@ def handle_key_press(self, e):
  time.sleep(delay)
 
 
- if e.name== "up" or e.name== "left" and display_updating==False:
+ if e.name== "up" or e.name== "left" and self.display_updating==False:
  self.scrollindex = self.scrollindex + 1
  if self.scrollindex > round(len(self.previous_lines)/self.lines_on_screen+1):
  self.scrollindex = round(len(self.previous_lines)/self.lines_on_screen+1)