kopia lustrzana https://github.com/peterhinch/micropython-micro-gui
114 wiersze
4.1 KiB
Python
114 wiersze
4.1 KiB
Python
# screens.py micro-gui demo of multiple screens, dropdowns etc
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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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# hardware_setup must be imported before other modules because of RAM use.
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import hardware_setup # Create a display instance
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from gui.core.ugui import Screen, Window, ssd
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from gui.widgets.label import Label
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from gui.widgets.buttons import Button, RadioButtons, CloseButton
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from gui.widgets.listbox import Listbox
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from gui.widgets.dropdown import Dropdown
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from gui.widgets.dialog import DialogBox
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from gui.core.writer import CWriter
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# Font for CWriter
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import gui.fonts.arial10 as arial10
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from gui.core.colors import *
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# Note that litcolor is defeated by design, because the callback's action
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# is to change the screen currency. This tests the bugfix.
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def fwdbutton(writer, row, col, cls_screen, text, color, *args, **kwargs):
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def fwd(button):
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Screen.change(cls_screen, args = args, kwargs = kwargs)
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Button(writer, row, col, callback = fwd, bgcolor = color, litcolor = YELLOW,
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text = text, textcolor = WHITE, shape = CLIPPED_RECT)
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# Demo of creating a dialog manually
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class UserDialogBox(Window):
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def __init__(self, writer, callback, args):
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def back(button, text):
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Window.value(text)
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callback(Window, *args)
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Screen.back()
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def close_cb(button, text):
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Window.value(text)
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callback(Window, *args)
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height = 80
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width = 150
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super().__init__(20, 20, height, width, bgcolor = DARKGREEN)
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row = self.height - 30
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# .locn converts Window relative row, col to absolute row, col
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Button(writer, *self.locn(row, 20), height = 20, width = 50, textcolor = BLACK, bgcolor = RED,
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text = 'Cat', callback = back, args = ('Cat',))
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Button(writer, *self.locn(row, 80), height = 20, width = 50, textcolor = BLACK, bgcolor = GREEN,
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text = 'Dog', callback = back, args = ('Dog',))
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CloseButton(writer, callback=close_cb, args = ('Close',))
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# Minimal screen change example
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class Overlay(Screen):
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def __init__(self):
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super().__init__()
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wri = CWriter(ssd, arial10, GREEN, BLACK, verbose=False)
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Label(wri, 20, 20, 'Screen overlays base')
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CloseButton(wri)
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class BaseScreen(Screen):
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def __init__(self):
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def lbcb(lb):
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print('Listbox', lb.textvalue())
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def ddcb(dd):
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print('Dropdown', tv := dd.textvalue())
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if tv == 'new screen':
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Screen.change(Overlay)
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def dbcb(window, label):
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label.value('Auto Dialog: {}'.format(window.value()))
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def udbcb(window, label):
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label.value('User Dialog: {}'.format(window.value()))
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super().__init__()
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wri = CWriter(ssd, arial10, GREEN, BLACK, verbose=False)
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col = 2
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row = 2
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Listbox(wri, row, col, callback=lbcb,
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elements = ('cat', 'dog', 'aardvark', 'goat', 'pig', 'mouse'),
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bdcolor = GREEN, bgcolor = DARKGREEN,
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also = Listbox.ON_LEAVE)
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col = 70
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Dropdown(wri, row, col, callback=ddcb,
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elements = ('hydrogen', 'helium', 'neon', 'xenon', 'new screen'),
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bdcolor = GREEN, bgcolor = DARKGREEN)
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row += 30
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lbl = Label(wri, row, col, 'Result from dialog box.')
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row += 20
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dialog_elements = (('Yes', GREEN), ('No', RED), ('Foo', YELLOW))
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# 1st 6 args are for fwdbutton
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fwdbutton(wri, row, col, DialogBox, 'Dialog', RED,
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# Args for DialogBox constructor
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wri, elements = dialog_elements, label = 'Test dialog', callback = dbcb, args = (lbl,))
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col += 60
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fwdbutton(wri, row, col, UserDialogBox, 'User', BLUE,
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# Args for UserDialogBox constructor
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wri, udbcb, (lbl,))
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CloseButton(wri) # Quit the application
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def test():
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if ssd.height < 128 or ssd.width < 240:
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print('This test requires a display of at least 240x128 pixels.')
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else:
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print('Testing micro-gui...')
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Screen.change(BaseScreen)
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test()
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