kopia lustrzana https://github.com/peterhinch/micropython-micro-gui
69 wiersze
2.8 KiB
Python
69 wiersze
2.8 KiB
Python
# menu.py Extension to micro-gui providing the Menu class
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2021 Peter Hinch
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# Usage:
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# from gui.widgets.menu import Menu
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from gui.core.ugui import Window, Screen
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from gui.widgets.buttons import Button
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from gui.widgets.listbox import Listbox
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from gui.core.colors import *
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# A SubMenu is a Window containing a Listbox
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# Next and Prev close the listbox without running the callback. This is
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# handled by Screen .move bound method
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class SubMenu(Window):
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def __init__(self, menu, button, elements, cb, args): # menu is parent Menu
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wri = menu.writer
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row = 10
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col = button.col + 4 # Drop down below top level menu button
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# Need to determine Window dimensions from size of Listbox, which
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# depends on number and length of elements.
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entry_height, lb_height, textwidth = Listbox.dimensions(wri, elements)
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lb_width = textwidth + 2
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# Calculate Window dimensions
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ap_height = lb_height + 6 # Allow for listbox border
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ap_width = lb_width + 6
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super().__init__(row, col, ap_height, ap_width)
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self.listbox = Listbox(wri, row + 3, col + 3, elements = elements, width = lb_width,
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fgcolor = button.fgcolor, bgcolor = button.bgcolor, bdcolor=False,
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fontcolor = button.textcolor, select_color = menu.select_color,
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callback = self.callback)
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self.cb = cb
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self.args = args
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def callback(self, obj_listbox):
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Screen.back()
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self.cb(obj_listbox, *self.args) # CB can access obj_listbox.value() or .textvalue()
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# A Menu is a set of Button objects at the top of the screen. On press, Buttons either run the
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# user callback or instantiate a SubMenu
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class Menu:
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def __init__(self, writer, *, height=25, bgcolor=None, fgcolor=None, textcolor=None, select_color=DARKBLUE, args): # ((text, cb, (args,)),(text, cb, (args,), (elements,)), ...)
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self.writer = writer
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self.select_color = select_color
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row = 2
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col = 2
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btn = {'bgcolor' : bgcolor,
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'fgcolor' : fgcolor,
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'height' : height,
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'textcolor' : textcolor, }
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for arg in args:
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if len(arg) == 4: # Handle submenu
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# txt, cb, (cbargs,), (elements,) = arg
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b = Button(writer, row, col, text=arg[0],
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callback=self.cb, args=arg, **btn)
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else:
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txt, cb, cbargs = arg
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b = Button(writer, row, col, text=txt,
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callback=cb, args=cbargs, **btn)
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col = b.mcol
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def cb(self, button, txt, user_cb, args, elements): # Button pushed which calls submenu
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args = (self, button, elements, user_cb, args)
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Screen.change(SubMenu, args = args)
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