BlueFox/lcdMenu
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Finally fully implemented the vertical scrolling; also, added more comments to the program for better understandability

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BlueFox
2024-11-12 21:26:34 +01:00
parent ed664eb794
commit 81fb57e2bf
2 changed files with 34 additions and 37 deletions
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4
README.md
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@@ -8,10 +8,10 @@ This project is the completely rewritten successor of my old (and now archived)
## Roadmap
- [x] forward, backward and select button
- [ ] support for horizontal and vertical scrolling
- [x] support for horizontal and vertical scrolling
- [x] support for both 2x16 and 4x20 LCDs
- [x] a reliable order of the menu items
- [ ] good documentation for all of this (maybe through examples)
- [x] good documentation for all of this (maybe through examples)
- [x] show an exit screen when a specific exit code is returned by a callback function
- [ ] make the menu itself exitable (to enable stuff like submenus, etc.)
- [x] make the project a valid python package

63
__init__.py
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@@ -63,10 +63,10 @@ class lcdMenu:
# fill the custom character fields in the displays memory
self.lcd.custom_char(0, bytearray([0x04,0x0A,0x11,0x00,0x00,0x00,0x00,0x00])) # arrow up
self.lcd.custom_char(1, bytearray([0x00,0x00,0x00,0x00,0x00,0x11,0x0A,0x04])) # arrow down
self.lcd.custom_char(2, bytearray([0x04,0x0A,0x11,0x00,0x00,0x11,0x0A,0x04])) # arrow up and down (variant 5 from above)
self.lcd.custom_char(3, bytearray([0x11,0x0A,0x04,0x00,0x00,0x04,0x0A,0x11])) # no options (variant 3 from above)
self.lcd.custom_char(4, bytearray([0x08,0x08,0x08,0x0F,0x08,0x08,0x08,0x08])) # line with a fork (to show the current selection - h scrolling)
self.lcd.custom_char(5, bytearray([0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08])) # line without a fork (to show unselected items - h scrolling)
self.lcd.custom_char(2, bytearray([0x04,0x0A,0x11,0x00,0x00,0x11,0x0A,0x04])) # arrow up and down
self.lcd.custom_char(3, bytearray([0x11,0x0A,0x04,0x00,0x00,0x04,0x0A,0x11])) # no options
self.lcd.custom_char(4, bytearray([0x08,0x08,0x08,0x0F,0x08,0x08,0x08,0x08])) # line with a fork (to show the current selection - v scrolling)
self.lcd.custom_char(5, bytearray([0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08])) # line without a fork (to show unselected items - v scrolling)
self.lcd.custom_char(6, bytearray([0x00,0x00,0x00,0x00,0x00,0x00,0x15,0x00])) # three dots in a row
# now show it off!
@@ -97,31 +97,28 @@ class lcdMenu:
# maybe the following could be done with a crazy math formula - but I want to keep it simpler!
# as there aren't enough menu items after the current selection to fill the display, we have to...
# ... calculate where to place the current selection, how many items there are before it and how many after it
"""
if lines_for_display > len(self.menu_items): # if it is because of an overall small number of menu items (less than we can display)
for i in range(len(self.menu_items)):
if i < self.current_selection:
self.lcd.putstr(chr(5)+" "+self.menu_items[i][0][0:lw-4])
self.lcd.putstr(" "*(lw-4-len(self.menu_items[i][0][0:lw-4])))
if len(self.menu_items) <= 1:
self.lcd.putstr(" " + chr(3)) # no options icon (as there's only one menu item!)
elif self.current_selection == 0 and not self.cycle:
self.lcd.putstr(" "+chr(1))
elif self.current_selection == (len(self.menu_items)-1) and not self.cycle:
self.lcd.putstr(" "+chr(0))
else:
self.lcd.putstr(" "+chr(2))
elif i == self.current_selection:
self.lcd.putstr(chr(5)+" "+self.menu_items[i][0][0:lw-4])
self.lcd.putstr(" "*(lw-4-len(self.menu_items[i][0][0:lw-4])))
elif i > self.current_selection:
menu_items_cut = self.menu_items[:lines_for_display:-1][::-1] # cut the menu_items list to the relevant last n ones maintaining order (n = number of lines for display)
current_pos_in_cut = -len(self.menu_items) + self.current_selection + lines_for_display # calculate the current index of the selection in the new cut
# draw all the lines
for i in range(lines_for_display):
if i == current_pos_in_cut: # if drawing the currently selected item
self.lcd.putstr(f"{chr(4)} {menu_items_cut[i][0][0:lw-4]}")
self.lcd.putstr(" " * ((lw-4)-len(menu_items_cut[i][0][0:lw-4]))) # fit the line
else:
self.lcd.putstr(f"{chr(5)} {menu_items_cut[i][0][0:lw-4]}")
self.lcd.putstr(" " * ((lw-4)-len(menu_items_cut[i][0][0:lw-4]))) # fit the line
# now the arrow
if i == 0: # if the first element is drawn, think about printing or not printing the up arrow
if self.current_selection == 0 and not self.cycle: # first item selected and no cycling
self.lcd.putstr(" ") # leave the line with spaces
else:
self.lcd.putstr(" " + chr(0))
elif i == lines_for_display-1: # if the last element is drawn, print a down arrow?
if self.current_selection == (len(self.menu_items)-1) and not self.cycle: # first item selected and no cycling
self.lcd.putstr(" ") # leave the line with spaces
else:
self.lcd.putstr(" " + chr(1)) # arrow down
print("Im here!")
else: # if it is because we reached the end of a (possibly) long menu list -> we have enough items to fill all the available lines
print("Else here!")
"""
print("ToDo!")
else: # there are enough items to fill the display after the current selection
# the first line
self.lcd.putstr(f"{chr(4)} {selection_name[0:lw-4]}")
@@ -129,12 +126,12 @@ class lcdMenu:
if len(self.menu_items) <= 1:
self.lcd.putstr(" " + chr(3)) # no options icon (as there's only one menu item!)
elif lines_for_display == 1: # if there is exactly one line to display the menu entries
if self.current_selection == 0 and not self.cycle:
elif lines_for_display == 1: # if there is exactly one line to display the menu entries...
if self.current_selection == 0 and not self.cycle: # ...and the first element is selected and cycling is disabled so you can't go back
self.lcd.putstr(" "+chr(1))
elif self.current_selection == (len(self.menu_items)-1) and not self.cycle:
elif self.current_selection == (len(self.menu_items)-1) and not self.cycle: # ...as before but with the last element -> you can't go further
self.lcd.putstr(" "+chr(0))
else:
else: # ...or anything else (cycling or in the middle -> you can go in both directions
self.lcd.putstr(" "+chr(2))
elif self.current_selection == 0 and not self.cycle: # first item selected and no cycling
self.lcd.putstr(" ") # leave the line with spaces
@@ -190,7 +187,7 @@ class lcdMenu:
return_value = selection[1]()
# show a exit when there's no specific return value
if not return_value: # if the return value is None / nothing was returned
if not return_value: # if the return value is None / nothing was returned -> show a closing message
while self.ok_btn.value() == 1: time.sleep(self.debounce_time) # wait till ok_btn release (e.g. if the "program" is a simple send action)
self.lcd.move_to(0,0)
if self.lcd.num_lines == 4: