def cursor_winch():
"""
Reports (signals) change in window dimensions; reports change in position
of cursor
"""
global rows, columns # instead of closure for Python 2 compatibility
print('this should be just off-screen')
w = CursorAwareWindow(sys.stdout,
sys.stdin,
keep_last_line=False,
hide_cursor=False)
def sigwinch_handler(signum, frame):
global rows, columns
dy = w.get_cursor_vertical_diff()
old_rows, old_columns = rows, columns
rows, columns = w.height, w.width
print('sigwinch! Changed from {!r} to {!r}'.format(
(old_rows, old_columns), (rows, columns)))
print('cursor moved %d lines down' % dy)
w.write(w.t.move_up)
w.write(w.t.move_up)
signal.signal(signal.SIGWINCH, sigwinch_handler)
with w:
for e in input.Input():
rows, columns = w.height, w.width
a = [
fmtstr(((f'.{rows}x{columns}.') * rows)[:columns])
for row in range(rows)
]
w.render_to_terminal(a)
if e == '<ESC>':
break
def fullscreen_winch_with_input():
"""
Monitors user input as well as screen size and acknowledges changes to both.
"""
print('this should be just off-screen')
w = FullscreenWindow(sys.stdout)
def sigwinch_handler(signum, frame):
print('sigwinch! Changed from %r to %r' % ((rows, columns),
(w.height, w.width)))
signal.signal(signal.SIGWINCH, sigwinch_handler)
with w:
with Cbreak(sys.stdin):
for e in input.Input():
rows, columns = w.height, w.width
a = [
fmtstr(
(('.%sx%s.%r.' % (rows, columns, e)) * rows)[:columns])
for row in range(rows)
]
w.render_to_terminal(a)
if e == u'<ESC>':
break
def cursor_winch():
global rows, columns
print('this should be just off-screen')
w = CursorAwareWindow(sys.stdout, sys.stdin, keep_last_line=True, hide_cursor=False)
def sigwinch_handler(signum, frame):
global rows, columns
dy = w.get_cursor_vertical_diff()
old_rows, old_columns = rows, columns
rows, columns = w.height, w.width
print('sigwinch! Changed from %r to %r' % ((old_rows, old_columns), (rows, columns)))
print('cursor moved %d lines down' % dy)
w.write(w.t.move_up)
w.write(w.t.move_up)
signal.signal(signal.SIGWINCH, sigwinch_handler)
with w:
for e in input.Input():
rows, columns = w.height, w.width
a = [fmtstr((('.%sx%s.' % (rows, columns)) * rows)[:columns]) for row in range(rows)]
w.render_to_terminal(a)
def array_size_test(window):
"""Tests arrays one row too small or too large"""
with window as w:
print(
'a displays a screen worth of input, s one line less, and d one line more'
)
with input.Input(sys.stdin) as input_generator:
while True:
c = input_generator.next()
rows, columns = w.height, w.width
if c == "":
sys.exit() # same as raise SystemExit()
elif c == "h":
a = w.array_from_text("a for small array")
elif c == "a":
a = [fmtstr(c * columns) for _ in range(rows)]
elif c == "s":
a = [fmtstr(c * columns) for _ in range(rows - 1)]
elif c == "d":
a = [fmtstr(c * columns) for _ in range(rows + 1)]
elif c == "f":
a = [fmtstr(c * columns) for _ in range(rows - 2)]
elif c == "q":
a = [fmtstr(c * columns) for _ in range(1)]
elif c == "w":
a = [fmtstr(c * columns) for _ in range(1)]
elif c == "e":
a = [fmtstr(c * columns) for _ in range(1)]
elif c == "c":
w.write(w.t.move(w.t.height - 1, 0))
w.scroll_down()
elif isinstance(c, events.WindowChangeEvent):
a = w.array_from_text(
"window just changed to %d rows and %d columns" %
(c.rows, c.columns))
elif c == u'<ESC>': # allows exit without keyboard interrupt
break
elif c == '\x0c': # ctrl-L
[w.write('\n') for _ in range(rows)]
continue
else:
a = w.array_from_text("unknown command")
w.render_to_terminal(a)