kopia lustrzana https://github.com/peterhinch/micropython-micro-gui
83 wiersze
3.4 KiB
Python
83 wiersze
3.4 KiB
Python
# menu.py Extension to micro-gui providing the Menu class
|
|
|
|
# Released under the MIT License (MIT). See LICENSE.
|
|
# Copyright (c) 2021 Peter Hinch
|
|
|
|
# Usage:
|
|
# from gui.widgets.menu import Menu
|
|
|
|
from gui.core.ugui import Window, Screen, display
|
|
from gui.widgets.buttons import Button
|
|
from gui.widgets.listbox import Listbox
|
|
from gui.core.colors import *
|
|
|
|
# A SubMenu is a Window containing a Listbox
|
|
# Next and Prev close the listbox without running the callback. This is
|
|
# handled by Screen .move bound method
|
|
class SubMenu(Window):
|
|
|
|
def __init__(self, menu, button, elements): # menu is parent Menu
|
|
self.menu = menu
|
|
self.button = button
|
|
wri = menu.writer
|
|
row = button.height + 2
|
|
col = button.col # Drop down below top level menu button
|
|
# Need to determine Window dimensions from size of Listbox, which
|
|
# depends on number and length of elements.
|
|
te = [x[0] for x in elements] # Text part
|
|
self.elements = elements
|
|
entry_height, lb_height, _, textwidth = Listbox.dimensions(wri, te, None)
|
|
lb_width = textwidth + 2
|
|
# Calculate Window dimensions
|
|
ap_height = lb_height + 6 # Allow for listbox border
|
|
ap_width = lb_width + 6
|
|
super().__init__(row, col, ap_height, ap_width, draw_border=False)
|
|
Listbox(wri, row + 3, col + 3, elements = te, width = lb_width,
|
|
fgcolor = button.fgcolor, bgcolor = button.bgcolor, bdcolor=False,
|
|
fontcolor = button.textcolor, select_color = menu.select_color,
|
|
callback = self.callback)
|
|
|
|
def callback(self, lbox):
|
|
display.ipdev.adj_mode(False) # If in 3-button mode, leave adjust mode
|
|
Screen.back()
|
|
el = self.elements[lbox.value()] # (text, cb, args)
|
|
if len(el) == 2: # Recurse into submenu
|
|
args = (self.menu, self.button, el[1])
|
|
Screen.change(SubMenu, args = args)
|
|
display.ipdev.adj_mode(True) # If in 3-button mode, go into adjust mode
|
|
else:
|
|
el[1](lbox, *el[2])
|
|
|
|
# A Menu is a set of Button objects at the top of the screen. On press, Buttons either run the
|
|
# user callback or instantiate a SubMenu
|
|
# args is a list comprising items which may be a mixture of two types
|
|
# Single items: (top_text, cb, (args, ...))
|
|
# Submenus: (top_text, ((mnu_text, cb, (args, ...)),(mnu_text, cb, (args, ...)),...)
|
|
class Menu:
|
|
|
|
def __init__(self, writer, *, height=25, bgcolor=None, fgcolor=None,
|
|
textcolor=None, select_color=DARKBLUE, args):
|
|
self.writer = writer
|
|
self.select_color = select_color
|
|
row = 2
|
|
col = 2
|
|
btn = {'bgcolor' : bgcolor,
|
|
'fgcolor' : fgcolor,
|
|
'height' : height,
|
|
'textcolor' : textcolor, }
|
|
for arg in args:
|
|
if len(arg) == 2: # Handle submenu
|
|
# txt, ((element, cb, (cbargs,)),(element,cb, (cbargs,)), ..) = arg
|
|
b = Button(writer, row, col, text=arg[0],
|
|
callback=self.cb, args=arg, **btn)
|
|
else:
|
|
txt, cb, cbargs = arg
|
|
b = Button(writer, row, col, text=txt,
|
|
callback=cb, args=cbargs, **btn)
|
|
col = b.mcol
|
|
|
|
def cb(self, button, txt, elements): # Button pushed which calls submenu
|
|
args = (self, button, elements)
|
|
Screen.change(SubMenu, args = args)
|
|
display.ipdev.adj_mode(True) # If in 3-button mode, go into adjust mode
|