81 lines
1.7 KiB
Python
81 lines
1.7 KiB
Python
import urwid
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window_stack = []
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window_names = []
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header = urwid.Text( "" )
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footer = urwid.Text( "" )
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ui = urwid.curses_display.Screen()
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ui.register_palette([
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# name, foreground, background, mono
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('banner', 'light gray', 'default', None),
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('menu', 'light gray', 'default', 'bold'),
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('selected', 'black', 'light gray', 'bold'),
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])
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top = urwid.Frame( urwid.SolidFill(), header, footer )
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def push_window( frame, name=None ):
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window_stack.append( frame )
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window_names.append( name )
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update_top()
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def pop_window():
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if len(window_stack) == 1:
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return False
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window_stack.pop()
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window_names.pop()
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update_top()
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clear_status()
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return True
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def update_top():
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names = [ n for n in window_names if n ]
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header.set_text(" - ".join( names ) + "\n")
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top.set_body( window_stack[-1] )
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def set_status(message):
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footer.set_text(message)
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def clear_status():
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footer.set_text("")
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class Abort(Exception):
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pass
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class Back(Exception):
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pass
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def raise_abort(*args, **kwargs):
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raise Abort()
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def raise_back(*args, **kwarg):
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raise Back()
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def redraw():
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cols, rows = ui.get_cols_rows()
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canvas = top.render( (cols, rows), focus=True )
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ui.draw_screen( (cols, rows), canvas )
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return cols, rows
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def event_loop(ui):
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while True:
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try:
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cols, rows = redraw()
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keys = ui.get_input()
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for k in keys:
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if k == "esc":
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if not pop_window():
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break
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elif k == "window resize":
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(cols, rows) = ui.get_cols_rows()
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else:
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top.keypress( (cols, rows), k )
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except Back:
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pop_window()
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except (Abort, KeyboardInterrupt):
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return
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