89 lines
2.6 KiB
Python
89 lines
2.6 KiB
Python
# Copyright 2015 Canonical, Ltd.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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""" View policy
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Contains some default key navigations
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"""
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from urwid import (
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emit_signal,
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Overlay,
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Text,
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)
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from subiquitycore.ui.container import (
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Columns,
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Pile,
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WidgetWrap,
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)
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from subiquitycore.ui.stretchy import StretchyOverlay
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from subiquitycore.ui.utils import disabled
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class BaseView(WidgetWrap):
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def show_overlay(self, overlay_widget, **kw):
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args = dict(
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align='center',
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width=('relative', 60),
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min_width=80,
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valign='middle',
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height='pack'
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)
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PADDING = 3
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# Don't expect callers to account for the padding if
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# they pass a fixed width.
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if 'width' in kw:
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if isinstance(kw['width'], int):
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kw['width'] += 2*PADDING
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args.update(kw)
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top = Pile([
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('pack', Text("")),
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Columns([
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(PADDING, Text("")),
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overlay_widget,
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(PADDING, Text(""))
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]),
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('pack', Text("")),
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])
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self._w = Overlay(top_w=top, bottom_w=disabled(self._w), **args)
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def show_stretchy_overlay(self, stretchy):
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emit_signal(stretchy, 'opened')
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stretchy.opened()
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self._w = StretchyOverlay(disabled(self._w), stretchy)
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def remove_overlay(self):
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if isinstance(self._w, StretchyOverlay):
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emit_signal(self._w.stretchy, 'closed')
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self._w.stretchy.closed()
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# disabled() wraps a widget in two decorations.
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self._w = self._w.bottom_w.original_widget.original_widget
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def cancel(self):
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pass
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def keypress(self, size, key):
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key = super().keypress(size, key)
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if key == 'esc':
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if hasattr(self._w, 'bottom_w'):
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self.remove_overlay()
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return None
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else:
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self.cancel()
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return None
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return key
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