# tbox.py Test/demo of Textbox widget for nano-gui

# Released under the MIT License (MIT). See LICENSE.
# Copyright (c) 2020 Peter Hinch

# Usage:
# import gui.demos.tbox

# Initialise hardware and framebuf before importing modules.
from color_setup import ssd  # Create a display instance

from gui.core.nanogui import refresh
from gui.core.writer import CWriter

import uasyncio as asyncio
from gui.core.colors import *
import gui.fonts.arial10 as arial10
from gui.widgets.label import Label
from gui.widgets.textbox import Textbox

# Args common to both Textbox instances
# Positional
pargs = (2, 2, 124, 7)  # Row, Col, Width, nlines

# Keyword
tbargs = {'fgcolor' : YELLOW,
          'bdcolor' : RED,
          'bgcolor' : DARKGREEN,
         }

async def wrap(wri):
    s = '''The textbox displays multiple lines of text in a field of fixed dimensions. \
Text may be clipped to the width of the control or may be word-wrapped. If the number \
of lines of text exceeds the height available, scrolling may be performed \
by calling a method.
'''
    tb = Textbox(wri, *pargs, clip=False, **tbargs)
    tb.append(s, ntrim = 100, line = 0)
    refresh(ssd)
    while True:
        await asyncio.sleep(1)
        if not tb.scroll(1):
            break
        refresh(ssd)

async def clip(wri):
    ss = ('clip demo', 'short', 'longer line', 'much longer line with spaces',
          'antidisestablishmentarianism', 'line with\nline break', 'Done')
    tb = Textbox(wri, *pargs, clip=True, **tbargs)
    for s in ss:
        tb.append(s, ntrim = 100) # Default line=None scrolls to show most recent
        refresh(ssd)
        await asyncio.sleep(1)
    

async def main(wri):
    await wrap(wri)
    await clip(wri)

def test():
    refresh(ssd, True)  # Initialise and clear display.
    CWriter.set_textpos(ssd, 0, 0)  # In case previous tests have altered it
    wri = CWriter(ssd, arial10, verbose=False)
    wri.set_clip(True, True, False)
    asyncio.run(main(wri))

test()