kopia lustrzana https://github.com/peterhinch/micropython-micro-gui
54 wiersze
1.4 KiB
Python
54 wiersze
1.4 KiB
Python
# screen_change.py Minimal micro-gui demo showing a Button causing a screen change.
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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, ssd
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from gui.widgets import Button, CloseButton, Label
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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 font
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from gui.core.colors import *
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# Defining a button in this way enables it to be re-used on
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# multiple Screen instances. Note that a Screen class is
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# passed, not an instance.
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def fwdbutton(wri, row, col, cls_screen, text='Next'):
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def fwd(button):
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Screen.change(cls_screen) # Callback
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Button(wri, row, col, callback = fwd,
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fgcolor = BLACK, bgcolor = GREEN,
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text = text, shape = RECTANGLE)
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wri = CWriter(ssd, font, GREEN, BLACK, verbose=False)
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# This screen overlays BaseScreen.
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class BackScreen(Screen):
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def __init__(self):
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super().__init__()
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Label(wri, 2, 2, 'New screen.')
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CloseButton(wri)
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class BaseScreen(Screen):
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def __init__(self):
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super().__init__()
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Label(wri, 2, 2, 'Base screen.')
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fwdbutton(wri, 40, 2, BackScreen)
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CloseButton(wri)
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def test():
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print('Screen change demo.')
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Screen.change(BaseScreen) # Pass class, not instance!
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test()
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