def messagebox(msg, mode=0):
"""
Draw a `Message Box` with :attr:`msg` in a specified type defined by
:attr:`mode`.
.. note:: This is a `static` method.
:param msg: The information to be displayed in message box.
:type msg: str
:param mode: A flag indicating the type of message box to be
displayed. The default value of `mode` is `0`.
==== ===========================================================
mode Message Box Type
==== ===========================================================
0 A simple message box showing a message without any buttons.
1 A message box with an `OK` button for user to confirm.
2 A message box with `OK` and `Cancel` buttons for user to
choose.
==== ===========================================================
:type mode: int
:return: A flag indicating the choice made by user.
====== =====================================================
Return Condition
====== =====================================================
0 #. No button is pressed while :attr:`mode` is `0`.
#. `OK` button pressed while :attr:`mode` is `1`.
#. `Cancel` button pressed while :attr:`mode` is `2`.
1 `OK` button pressed while :attr:`mode` is `2`.
====== =====================================================
:rtype: int
"""
pos_x = 24 if mode == 0 else 20
pos_y = 10
width = 30 if mode == 0 else 40
height = 2
messages = CommonUtil.cut_message(msg, width - 4)
height += len(messages)
if mode:
height += 2
# Draw Shadow
shadow = curses.newwin(height, width, pos_y + 1, pos_x + 1)
shadow.bkgd(' ', curses.color_pair(8))
shadow.refresh()
# Draw Subwindow
screen = curses.newwin(height, width, pos_y, pos_x)
screen.box()
screen.bkgd(' ', curses.color_pair(2))
screen.keypad(1)
# Set local variable
normal = curses.A_NORMAL
select = curses.A_REVERSE
# Insert messages
for i in range(len(messages)):
screen.addstr(1 + i, 2, messages[i].center(width - 4), normal)
if mode == 0:
screen.refresh()
else:
# Draw subwindow frame
line_height = 1 + len(messages)
screen.hline(line_height, 1, curses.ACS_HLINE, width - 2)
screen.addch(line_height, 0, curses.ACS_SSSB)
screen.addch(line_height, width - 1, curses.ACS_SBSS)
tab = 0
key_in = None
while key_in != 27:
if mode == 1:
choices = ["OK"]
elif mode == 2:
choices = ["OK", "Cancel"]
else:
return 0
for i, item in enumerate(choices):
item_str = ''.join(['[', item, ']'])
tab_pos_x = 6 + 20 * i if mode == 2 else 18
screen.addstr(line_height + 1, tab_pos_x, item_str,
select if i == tab else normal)
screen.refresh()
key_in = screen.getch()
if mode == 2:
# OK or Cancel
if key_in in [9, curses.KEY_LEFT, curses.KEY_RIGHT]:
tab = [1, 0][tab]
if key_in in [ord('a'), ord('c')]:
key_in -= (ord('a') - ord('A'))
if key_in in [ord('C'), ord('O')]:
return [ord('C'), ord('O')].index(key_in)
if key_in in [10, 32]:
return not tab
return 0
