| 1 | #!/usr/bin/python |
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| 2 | # |
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| 3 | # Urwid example similar to dialog(1) program |
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| 4 | # Copyright (C) 2004-2009 Ian Ward |
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| 5 | # |
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| 6 | # This library is free software; you can redistribute it and/or |
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| 7 | # modify it under the terms of the GNU Lesser General Public |
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| 8 | # License as published by the Free Software Foundation; either |
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| 9 | # version 2.1 of the License, or (at your option) any later version. |
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| 10 | # |
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| 11 | # This library is distributed in the hope that it will be useful, |
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| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | # Lesser General Public License for more details. |
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| 15 | # |
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| 16 | # You should have received a copy of the GNU Lesser General Public |
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| 17 | # License along with this library; if not, write to the Free Software |
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| 18 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 19 | # |
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| 20 | # Urwid web site: http://excess.org/urwid/ |
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| 21 | |
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| 22 | """ |
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| 23 | Urwid example similar to dialog(1) program |
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| 24 | |
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| 25 | """ |
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| 26 | |
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| 27 | import sys |
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| 28 | |
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| 29 | import urwid |
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| 30 | |
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| 31 | |
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| 32 | class DialogExit(Exception): |
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| 33 | pass |
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| 34 | |
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| 35 | |
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| 36 | class DialogDisplay: |
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| 37 | palette = [ |
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| 38 | ('body','black','light gray', 'standout'), |
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| 39 | ('border','black','dark blue'), |
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| 40 | ('shadow','white','black'), |
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| 41 | ('selectable','black', 'dark cyan'), |
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| 42 | ('focus','white','dark blue','bold'), |
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| 43 | ('focustext','light gray','dark blue'), |
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| 44 | ] |
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| 45 | |
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| 46 | def __init__(self, text, height, width, body=None): |
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| 47 | width = int(width) |
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| 48 | if width <= 0: |
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| 49 | width = ('relative', 80) |
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| 50 | height = int(height) |
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| 51 | if height <= 0: |
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| 52 | height = ('relative', 80) |
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| 53 | |
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| 54 | self.body = body |
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| 55 | if body is None: |
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| 56 | # fill space with nothing |
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| 57 | body = urwid.Filler(urwid.Divider(),'top') |
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| 58 | |
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| 59 | self.frame = urwid.Frame( body, focus_part='footer') |
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| 60 | if text is not None: |
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| 61 | self.frame.header = urwid.Pile( [urwid.Text(text), |
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| 62 | urwid.Divider()] ) |
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| 63 | w = self.frame |
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| 64 | |
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| 65 | # pad area around listbox |
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| 66 | w = urwid.Padding(w, ('fixed left',2), ('fixed right',2)) |
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| 67 | w = urwid.Filler(w, ('fixed top',1), ('fixed bottom',1)) |
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| 68 | w = urwid.AttrWrap(w, 'body') |
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| 69 | |
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| 70 | # "shadow" effect |
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| 71 | w = urwid.Columns( [w,('fixed', 2, urwid.AttrWrap( |
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| 72 | urwid.Filler(urwid.Text(('border',' ')), "top") |
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| 73 | ,'shadow'))]) |
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| 74 | w = urwid.Frame( w, footer = |
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| 75 | urwid.AttrWrap(urwid.Text(('border',' ')),'shadow')) |
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| 76 | |
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| 77 | # outermost border area |
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| 78 | w = urwid.Padding(w, 'center', width ) |
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| 79 | w = urwid.Filler(w, 'middle', height ) |
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| 80 | w = urwid.AttrWrap( w, 'border' ) |
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| 81 | |
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| 82 | self.view = w |
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| 83 | |
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| 84 | |
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| 85 | def add_buttons(self, buttons): |
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| 86 | l = [] |
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| 87 | for name, exitcode in buttons: |
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| 88 | b = urwid.Button( name, self.button_press ) |
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| 89 | b.exitcode = exitcode |
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| 90 | b = urwid.AttrWrap( b, 'selectable','focus' ) |
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| 91 | l.append( b ) |
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| 92 | self.buttons = urwid.GridFlow(l, 10, 3, 1, 'center') |
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| 93 | self.frame.footer = urwid.Pile( [ urwid.Divider(), |
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| 94 | self.buttons ], focus_item = 1) |
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| 95 | |
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| 96 | def button_press(self, button): |
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| 97 | raise DialogExit(button.exitcode) |
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| 98 | |
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| 99 | def main(self): |
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| 100 | self.loop = urwid.MainLoop(self.view, self.palette) |
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| 101 | try: |
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| 102 | self.loop.run() |
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| 103 | except DialogExit, e: |
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| 104 | return self.on_exit( e.args[0] ) |
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| 105 | |
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| 106 | def on_exit(self, exitcode): |
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| 107 | return exitcode, "" |
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| 108 | |
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| 109 | |
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| 110 | |
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| 111 | class InputDialogDisplay(DialogDisplay): |
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| 112 | def __init__(self, text, height, width): |
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| 113 | self.edit = urwid.Edit() |
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| 114 | body = urwid.ListBox([self.edit]) |
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| 115 | body = urwid.AttrWrap(body, 'selectable','focustext') |
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| 116 | |
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| 117 | DialogDisplay.__init__(self, text, height, width, body) |
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| 118 | |
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| 119 | self.frame.set_focus('body') |
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| 120 | |
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| 121 | def unhandled_key(self, size, k): |
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| 122 | if k in ('up','page up'): |
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| 123 | self.frame.set_focus('body') |
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| 124 | if k in ('down','page down'): |
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| 125 | self.frame.set_focus('footer') |
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| 126 | if k == 'enter': |
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| 127 | # pass enter to the "ok" button |
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| 128 | self.frame.set_focus('footer') |
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| 129 | self.view.keypress( size, k ) |
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| 130 | |
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| 131 | def on_exit(self, exitcode): |
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| 132 | return exitcode, self.edit.get_edit_text() |
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| 133 | |
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| 134 | |
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| 135 | class TextDialogDisplay(DialogDisplay): |
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| 136 | def __init__(self, file, height, width): |
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| 137 | l = [] |
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| 138 | # read the whole file (being slow, not lazy this time) |
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| 139 | for line in open(file).readlines(): |
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| 140 | l.append( urwid.Text( line.rstrip() )) |
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| 141 | body = urwid.ListBox(l) |
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| 142 | body = urwid.AttrWrap(body, 'selectable','focustext') |
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| 143 | |
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| 144 | DialogDisplay.__init__(self, None, height, width, body) |
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| 145 | |
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| 146 | |
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| 147 | def unhandled_key(self, size, k): |
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| 148 | if k in ('up','page up','down','page down'): |
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| 149 | self.frame.set_focus('body') |
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| 150 | self.view.keypress( size, k ) |
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| 151 | self.frame.set_focus('footer') |
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| 152 | |
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| 153 | |
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| 154 | class ListDialogDisplay(DialogDisplay): |
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| 155 | def __init__(self, text, height, width, constr, items, has_default): |
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| 156 | j = [] |
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| 157 | if has_default: |
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| 158 | k, tail = 3, () |
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| 159 | else: |
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| 160 | k, tail = 2, ("no",) |
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| 161 | while items: |
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| 162 | j.append( items[:k] + tail ) |
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| 163 | items = items[k:] |
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| 164 | |
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| 165 | l = [] |
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| 166 | self.items = [] |
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| 167 | for tag, item, default in j: |
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| 168 | w = constr( tag, default=="on" ) |
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| 169 | self.items.append(w) |
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| 170 | w = urwid.Columns( [('fixed', 12, w), |
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| 171 | urwid.Text(item)], 2 ) |
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| 172 | w = urwid.AttrWrap(w, 'selectable','focus') |
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| 173 | l.append(w) |
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| 174 | |
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| 175 | lb = urwid.ListBox(l) |
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| 176 | lb = urwid.AttrWrap( lb, "selectable" ) |
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| 177 | DialogDisplay.__init__(self, text, height, width, lb ) |
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| 178 | |
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| 179 | self.frame.set_focus('body') |
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| 180 | |
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| 181 | def unhandled_key(self, size, k): |
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| 182 | if k in ('up','page up'): |
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| 183 | self.frame.set_focus('body') |
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| 184 | if k in ('down','page down'): |
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| 185 | self.frame.set_focus('footer') |
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| 186 | if k == 'enter': |
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| 187 | # pass enter to the "ok" button |
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| 188 | self.frame.set_focus('footer') |
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| 189 | self.buttons.set_focus(0) |
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| 190 | self.view.keypress( size, k ) |
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| 191 | |
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| 192 | def on_exit(self, exitcode): |
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| 193 | """Print the tag of the item selected.""" |
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| 194 | if exitcode != 0: |
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| 195 | return exitcode, "" |
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| 196 | s = "" |
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| 197 | for i in self.items: |
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| 198 | if i.get_state(): |
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| 199 | s = i.get_label() |
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| 200 | break |
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| 201 | return exitcode, s |
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| 202 | |
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| 203 | |
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| 204 | |
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| 205 | |
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| 206 | class CheckListDialogDisplay(ListDialogDisplay): |
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| 207 | def on_exit(self, exitcode): |
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| 208 | """ |
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| 209 | Mimick dialog(1)'s --checklist exit. |
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| 210 | Put each checked item in double quotes with a trailing space. |
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| 211 | """ |
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| 212 | if exitcode != 0: |
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| 213 | return exitcode, "" |
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| 214 | l = [] |
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| 215 | for i in self.items: |
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| 216 | if i.get_state(): |
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| 217 | l.append(i.get_label()) |
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| 218 | return exitcode, "".join(['"'+tag+'" ' for tag in l]) |
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| 219 | |
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| 220 | |
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| 221 | |
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| 222 | |
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| 223 | class MenuItem(urwid.Text): |
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| 224 | """A custom widget for the --menu option""" |
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| 225 | def __init__(self, label): |
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| 226 | urwid.Text.__init__(self, label) |
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| 227 | self.state = False |
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| 228 | def selectable(self): |
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| 229 | return True |
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| 230 | def keypress(self,size,key): |
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| 231 | if key == "enter": |
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| 232 | self.state = True |
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| 233 | raise DialogExit, 0 |
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| 234 | return key |
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| 235 | def mouse_event(self,size,event,button,col,row,focus): |
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| 236 | if event=='mouse release': |
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| 237 | self.state = True |
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| 238 | raise DialogExit, 0 |
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| 239 | return False |
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| 240 | def get_state(self): |
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| 241 | return self.state |
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| 242 | def get_label(self): |
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| 243 | text, attr = self.get_text() |
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| 244 | return text |
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| 245 | |
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| 246 | |
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| 247 | def do_checklist(text, height, width, list_height, *items): |
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| 248 | def constr(tag, state): |
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| 249 | return urwid.CheckBox(tag, state) |
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| 250 | d = CheckListDialogDisplay( text, height, width, constr, items, True) |
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| 251 | d.add_buttons([ ("OK", 0), ("Cancel", 1) ]) |
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| 252 | return d |
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| 253 | |
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| 254 | def do_inputbox(text, height, width): |
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| 255 | d = InputDialogDisplay( text, height, width ) |
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| 256 | d.add_buttons([ ("Exit", 0) ]) |
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| 257 | return d |
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| 258 | |
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| 259 | def do_menu(text, height, width, menu_height, *items): |
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| 260 | def constr(tag, state ): |
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| 261 | return MenuItem(tag) |
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| 262 | d = ListDialogDisplay(text, height, width, constr, items, False) |
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| 263 | d.add_buttons([ ("OK", 0), ("Cancel", 1) ]) |
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| 264 | return d |
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| 265 | |
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| 266 | def do_msgbox(text, height, width): |
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| 267 | d = DialogDisplay( text, height, width ) |
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| 268 | d.add_buttons([ ("OK", 0) ]) |
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| 269 | return d |
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| 270 | |
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| 271 | def do_radiolist(text, height, width, list_height, *items): |
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| 272 | radiolist = [] |
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| 273 | def constr(tag, state, radiolist=radiolist): |
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| 274 | return urwid.RadioButton(radiolist, tag, state) |
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| 275 | d = ListDialogDisplay( text, height, width, constr, items, True ) |
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| 276 | d.add_buttons([ ("OK", 0), ("Cancel", 1) ]) |
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| 277 | return d |
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| 278 | |
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| 279 | def do_textbox(file, height, width): |
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| 280 | d = TextDialogDisplay( file, height, width ) |
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| 281 | d.add_buttons([ ("Exit", 0) ]) |
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| 282 | return d |
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| 283 | |
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| 284 | def do_yesno(text, height, width): |
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| 285 | d = DialogDisplay( text, height, width ) |
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| 286 | d.add_buttons([ ("Yes", 0), ("No", 1) ]) |
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| 287 | return d |
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| 288 | |
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| 289 | MODES={ '--checklist': (do_checklist, |
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| 290 | "text height width list-height [ tag item status ] ..."), |
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| 291 | '--inputbox': (do_inputbox, |
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| 292 | "text height width"), |
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| 293 | '--menu': (do_menu, |
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| 294 | "text height width menu-height [ tag item ] ..."), |
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| 295 | '--msgbox': (do_msgbox, |
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| 296 | "text height width"), |
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| 297 | '--radiolist': (do_radiolist, |
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| 298 | "text height width list-height [ tag item status ] ..."), |
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| 299 | '--textbox': (do_textbox, |
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| 300 | "file height width"), |
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| 301 | '--yesno': (do_yesno, |
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| 302 | "text height width"), |
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| 303 | } |
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| 304 | |
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| 305 | |
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| 306 | def show_usage(): |
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| 307 | """ |
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| 308 | Display a helpful usage message. |
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| 309 | """ |
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| 310 | modelist = [(mode, help) for (mode, (fn, help)) in MODES.items()] |
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| 311 | modelist.sort() |
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| 312 | sys.stdout.write( |
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| 313 | __doc__ + |
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| 314 | "\n".join(["%-15s %s"%(mode,help) for (mode,help) in modelist]) |
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| 315 | + """ |
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| 316 | |
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| 317 | height and width may be set to 0 to auto-size. |
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| 318 | list-height and menu-height are currently ignored. |
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| 319 | status may be either on or off. |
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| 320 | """ ) |
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| 321 | |
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| 322 | |
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| 323 | def main(): |
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| 324 | if len(sys.argv) < 2 or not MODES.has_key(sys.argv[1]): |
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| 325 | show_usage() |
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| 326 | return |
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| 327 | |
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| 328 | # Create a DialogDisplay instance |
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| 329 | fn, help = MODES[sys.argv[1]] |
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| 330 | d = fn( * sys.argv[2:] ) |
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| 331 | |
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| 332 | # Run it |
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| 333 | exitcode, exitstring = d.main() |
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| 334 | |
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| 335 | # Exit |
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| 336 | if exitstring: |
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| 337 | sys.stderr.write(exitstring+"\n") |
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| 338 | |
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| 339 | sys.exit(exitcode) |
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| 340 | |
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| 341 | |
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| 342 | if __name__=="__main__": |
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| 343 | main() |
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