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#!/usr/bin/env python
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__author__ = "Ira W. Snyder (devel@irasnyder.com)"
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__copyright__ = "Copyright (c) 2006 Ira W. Snyder (devel@irasnyder.com)"
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__license__ = "GNU GPL v2 (or, at your option, any later version)"
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from PyCompat import * # fixes for school computers
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def getstr (prompt):
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return raw_input (prompt + ': ')
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class MenuEntry (object):
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def __init__ (self, key, prompt, callback_func, hidden=False):
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self.key = key
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self.prompt = prompt
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self.callback_func = callback_func
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self.hidden = hidden
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class Menu (object):
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def __init__ (self, entries=None, autorun=False, name=None):
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if not entries:
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self.entries = []
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else:
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self.entries = entries
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self.autorun = autorun
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self.name = name
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def __sort_entries (self):
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newlist = []
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for e in self.entries:
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newlist.append ((e.key, e))
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newlist.sort ()
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self.entries = [e[1] for e in newlist]
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def add_entry (self, key, prompt, callback_func):
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for e in self.entries:
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if e.key == str(key):
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raise ValueError
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self.entries.append (MenuEntry (str(key), prompt, callback_func))
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self.__sort_entries ()
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def hide_entry (self, key):
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for e in self.entries:
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if e.key == str(key):
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e.hidden = True
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def unhide_entry (self, key):
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for e in self.entries:
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if e.key == str(key):
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e.hidden = False
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def show_menu (self):
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if self.name:
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print self.name
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print '========================================'
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for e in self.entries:
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if not e.hidden:
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print '%s) %s' % (e.key, e.prompt)
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def run_menu (self):
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choices = {}
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for e in self.entries:
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if not e.hidden:
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choices[e.key] = e.callback_func
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ok = False
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while not ok:
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self.show_menu ()
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c = getstr ('Enter Choice')
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print
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if c in choices.keys():
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ok = True
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if self.autorun:
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result = choices[c]()
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return (c, result)
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else:
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return (c, choices[c]) # (choice, callback function pointer)
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else:
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print 'Unrecognized Choice, try again!\n'
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import sys
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def main ():
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m = Menu ()
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m.add_entry (1, 'Run DFS', lambda: 'in dfs')
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m.add_entry (2, 'Run BFS', lambda: 'in bfs')
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m.add_entry (3, 'Enter Data', lambda: 'enter data')
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m.add_entry ('Q', 'Quit', sys.exit)
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stat = m.run_menu ()
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print 'stat:', stat
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if __name__ == '__main__':
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main ()
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