Hi again,
within the features I'm testing I need to exit temporary from the
urwid application to open a shell and come back after.
With curses module, this is done using "curses.endwin();
os.system('sh'); myapp_show_screen_()".
In urwid I'm trying with ui.stop & ui.start (before and after the
"os.system('bash')" call).
Problems found:
- after entering shell cursor is not shown
- after coming back to urwid app, besides a myapp_display() explicit
call, nothing is shown in screen, this only happens after an event
(f.e. key press), and then the colors (or header and footer of the
fram in my sample app) are not shown
Look at the attached file for a case example.
Environment; raw_display, urwid v0.9.8, python 2.4.5, fc6
Thanks,
Iñigo
--
Iñigo Serna
Katxijasotzaileak
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os, os.path, sys
import urwid
import urwid.raw_display
ui = None
class InternalView:
"""Internal View class"""
def __init__(self, title, buf, vcenter=True):
self.title = title
self.init_ui()
self.orig_buf = buf
self.vcenter = vcenter
self.__validate_buf()
def init_ui(self):
self.size = ui.get_cols_rows()
palete = [
('header', 'yellow', 'dark blue', 'bold'),
('footer', 'brown', 'dark blue'),
('body2', 'light blue', 'default'),
('body', 'light gray', 'default')]
ui.register_palette(palete)
def __validate_buf(self, y=0):
w = self.size[0]
h = self.size[1]-2
buf = [(l[:-1][:w-2], 'body') for l in self.orig_buf]
buf2 = [l for l in buf]
self.nlines = len(buf2)
if self.nlines > h:
self.y0 = 0
self.large = True
self.y = y
else:
self.y0 = int(((h) - self.nlines)/2)
self.large = False
self.y = -1
if self.vcenter:
col_max = max(map(len, buf2))
self.x0 = int((w - col_max)/2)
else:
col_max = -1
self.x0 = 1
self.buf = buf
def display(self):
"""show title, file and status bar"""
w = self.size[0]; h = self.size[1]-2
title = self.title
if len(title) - 4 > w:
title = title[:w-12] + '~' + title[-7:]
header = urwid.Text(('header', title), align='center')
header = urwid.AttrWrap(header, 'footer')
contents = []
i = 0
# self.win_body.addstr(self.y0 + i, self.x0, l)
if self.large:
for l, c in self.buf[self.y:self.y+self.size[0]-2]:
t = urwid.Text((c, l), wrap='clip')
contents.append(t)
i += 1
else:
for l, c in self.buf:
t = urwid.Text((c, l), wrap='clip')
contents.append(t)
i += 1
w = urwid.SimpleListWalker(contents)
body = urwid.AttrWrap(urwid.ListBox(w), 'body')
if self.large:
status = ''
else:
status = 'Press a key to continue'
footer = urwid.Text(('footer', status), align='center', wrap='clip')
footer = urwid.AttrWrap(footer, 'footer')
frame = urwid.Frame(body, header, footer)
canvas = frame.render(self.size, focus=1)
ui.draw_screen(self.size, canvas)
def run(self):
self.display()
ymax = self.nlines - self.size[1] + 3
w_body = self.size[1] - 2
if self.large:
quit = False
while not quit:
keys = None
while not keys:
keys = ui.get_input()
for k in keys:
if k in ('p', 'P', 'up'):
if self.y != 0:
self.y -= 1
elif k in ('n', 'N', 'down'):
if self.y < ymax:
self.y += 1
elif k in ('home', ):
self.y = 0
elif k in ('end', ):
self.y = ymax
elif k in ('page up', 'backspace'):
self.y -= w_body
if self.y < 0:
self.y = 0
elif k in ('page down', ' '):
self.y += w_body
if self.y > self.nlines - 1:
self.y = ymax
elif k == 'ctrl o':
ui.stop()
os.system('sh')
ui.start()
elif k in ('q', 'Q', 'x', 'X', 'esc', 'f3', 'f10'):
quit = True
elif k == 'window resize':
self.size = ui.get_cols_rows()
self.__validate_buf(y=self.y)
self.display()
else:
while not ui.get_input():
pass
def main():
global ui
ui = urwid.raw_display.Screen()
title = sys.argv[0]
buf = open(title).readlines()
v = InternalView(title, buf)
ui.run_wrapper(v.run)
if __name__ == '__main__':
main()
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