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107 lines
3.0 KiB
Python
107 lines
3.0 KiB
Python
import urwid
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from . import common
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class _OptionWidget(urwid.WidgetWrap):
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def __init__(self, option, text, shortcut, active, focus):
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self.option = option
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textattr = "text"
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keyattr = "key"
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if focus and active:
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textattr = "option_active_selected"
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keyattr = "option_selected_key"
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elif focus:
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textattr = "option_selected"
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keyattr = "option_selected_key"
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elif active:
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textattr = "option_active"
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text = common.highlight_key(
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text,
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shortcut,
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textattr = textattr,
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keyattr = keyattr
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)
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opt = urwid.Text(text, align="left")
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opt = urwid.AttrWrap(opt, textattr)
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opt = urwid.Padding(opt, align = "center", width = 40)
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urwid.WidgetWrap.__init__(self, opt)
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def keypress(self, size, key):
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return key
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def selectable(self):
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return True
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class OptionWalker(urwid.ListWalker):
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def __init__(self, options):
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urwid.ListWalker.__init__(self)
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self.options = options
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self.focus = 0
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def set_focus(self, pos):
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self.focus = pos
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def get_focus(self):
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return self.options[self.focus].render(True), self.focus
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def get_next(self, pos):
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if pos >= len(self.options)-1:
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return None, None
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return self.options[pos+1].render(False), pos+1
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def get_prev(self, pos):
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if pos <= 0:
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return None, None
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return self.options[pos-1].render(False), pos-1
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class Heading:
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def __init__(self, text):
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self.text = text
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def render(self, focus):
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opt = urwid.Text("\n" + self.text, align="left")
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opt = urwid.AttrWrap(opt, "title")
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opt = urwid.Padding(opt, align = "center", width = 40)
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return opt
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_neg = lambda: False
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class Option:
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def __init__(self, text, shortcut, getstate=None, activate=None):
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self.text = text
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self.shortcut = shortcut
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self.getstate = getstate or _neg
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self.activate = activate or _neg
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def render(self, focus):
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return _OptionWidget(self, self.text, self.shortcut, self.getstate(), focus)
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class Select(urwid.ListBox):
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def __init__(self, options):
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self.walker = OptionWalker(options)
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urwid.ListBox.__init__(
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self,
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self.walker
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)
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self.options = options
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self.keymap = {}
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for i in options:
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if hasattr(i, "shortcut"):
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if i.shortcut in self.keymap:
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raise ValueError("Duplicate shortcut key: %s"%i.shortcut)
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self.keymap[i.shortcut] = i
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def keypress(self, size, key):
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if key == "enter" or key == " ":
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self.get_focus()[0].option.activate()
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return None
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key = common.shortcuts(key)
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if key in self.keymap:
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self.keymap[key].activate()
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self.set_focus(self.options.index(self.keymap[key]))
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return None
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return super(self.__class__, self).keypress(size, key)
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