kopia lustrzana https://github.com/peterhinch/micropython-micro-gui
121 wiersze
3.5 KiB
Python
121 wiersze
3.5 KiB
Python
# tbox.py Test/demo of Textbox widget for micro-gui
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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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# import gui.demos.tbox
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# Initialise hardware and framebuf before importing modules.
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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.core.writer import CWriter
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import uasyncio as asyncio
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from gui.core.colors import *
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import gui.fonts.arial10 as arial10
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from gui.widgets.label import Label
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from gui.widgets.textbox import Textbox
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from gui.widgets.buttons import Button, CloseButton
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wri = CWriter(ssd, arial10) # verbose = True
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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)
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b = Button(wri, row, col,
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callback = fwd, fgcolor = BLACK, bgcolor = GREEN,
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text = text, shape = RECTANGLE)
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return b.mrow
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async def wrap(tb):
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s = '''The textbox displays multiple lines of text in a field of fixed dimensions. \
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Text may be clipped to the width of the control or may be word-wrapped. If the number \
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of lines of text exceeds the height available, scrolling may be performed \
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by calling a method.
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'''
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tb.clear()
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tb.append(s, ntrim = 100, line = 0)
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while True:
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await asyncio.sleep(1)
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if not tb.scroll(1):
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break
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async def clip(tb):
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ss = ('clip demo', 'short', 'longer line', 'much longer line with spaces',
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'antidisestablishmentarianism', 'line with\nline break', 'Done')
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tb.clear()
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for s in ss:
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tb.append(s, ntrim = 100) # Default line=None scrolls to show most recent
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await asyncio.sleep(1)
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# Args for textboxes
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# Positional
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pargs = (2, 2, 100, 7) # Row, Col, Width, nlines
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# Keyword
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tbargs = {'fgcolor' : YELLOW,
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'bdcolor' : RED,
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'bgcolor' : BLACK,
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}
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class TBCScreen(Screen):
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def __init__(self):
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super().__init__()
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self.tb = Textbox(wri, *pargs, clip=True, **tbargs)
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CloseButton(wri)
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asyncio.create_task(self.main())
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async def main(self):
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await clip(self.tb)
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class TBWScreen(Screen):
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def __init__(self):
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super().__init__()
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self.tb = Textbox(wri, *pargs, clip=False, **tbargs)
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CloseButton(wri)
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asyncio.create_task(self.main())
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async def main(self):
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await wrap(self.tb)
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user_str = '''The textbox displays multiple lines of text in a field of fixed dimensions. \
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Text may be clipped to the width of the control or may be word-wrapped. If the number \
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of lines of text exceeds the height available, scrolling may be performed \
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by calling a method.
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Please use the increase and decrease buttons (or encoder) to scroll this text.
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'''
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class TBUScreen(Screen):
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def __init__(self):
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super().__init__()
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tb = Textbox(wri, *pargs, clip=False, active=True, **tbargs)
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tb.append(user_str, ntrim=100)
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CloseButton(wri)
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class MainScreen(Screen):
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def __init__(self):
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super().__init__()
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Label(wri, 2, 2, 'Select test to run')
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col = 2
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row = 20
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row = fwdbutton(wri, row, col, TBWScreen, 'Wrap') + 2
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row = fwdbutton(wri, row, col, TBCScreen, 'Clip') + 2
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fwdbutton(wri, row, col, TBUScreen, 'Scroll')
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CloseButton(wri)
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def test():
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if ssd.height < 128 or ssd.width < 128:
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print(' This test requires a display of at least 128x128 pixels.')
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else:
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print('Textbox demo.')
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Screen.change(MainScreen)
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test()
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