132 lines
3.9 KiB
Python
132 lines
3.9 KiB
Python
# Created By: Virgil Dupras
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# Created On: 2011-09-06
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# Copyright 2013 Hardcoded Software (http://www.hardcoded.net)
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#
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# This software is licensed under the "BSD" License as described in the "LICENSE" file,
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# which should be included with this package. The terms are also available at
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# http://www.hardcoded.net/licenses/bsd_license
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from collections import Sequence, MutableSequence
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from .base import GUIObject
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class Selectable(Sequence):
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def __init__(self):
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self._selected_indexes = []
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#--- Private
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def _check_selection_range(self):
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if not self:
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self._selected_indexes = []
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if not self._selected_indexes:
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return
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self._selected_indexes = [index for index in self._selected_indexes if index < len(self)]
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if not self._selected_indexes:
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self._selected_indexes = [len(self) - 1]
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#--- Virtual
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def _update_selection(self):
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# Takes the table's selection and does appropriates updates on the view and/or model, when
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# appropriate. Common sense would dictate that when the selection doesn't change, we don't
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# update anything (and thus don't call _update_selection() at all), but there are cases
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# where it's false. For example, if our list updates its items but doesn't change its
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# selection, we probably want to update the model's selection. A redesign of how this whole
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# thing works is probably in order, but not now, there's too much breakage at once involved.
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pass
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#--- Public
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def select(self, indexes):
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if isinstance(indexes, int):
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indexes = [indexes]
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self.selected_indexes = indexes
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self._update_selection()
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#--- Properties
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@property
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def selected_index(self):
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return self._selected_indexes[0] if self._selected_indexes else None
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@selected_index.setter
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def selected_index(self, value):
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self.selected_indexes = [value]
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@property
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def selected_indexes(self):
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return self._selected_indexes
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@selected_indexes.setter
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def selected_indexes(self, value):
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self._selected_indexes = value
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self._selected_indexes.sort()
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self._check_selection_range()
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class SelectableList(MutableSequence, Selectable):
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def __init__(self, items=None):
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Selectable.__init__(self)
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if items:
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self._items = list(items)
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else:
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self._items = []
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def __delitem__(self, key):
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self._items.__delitem__(key)
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self._check_selection_range()
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self._on_change()
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def __getitem__(self, key):
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return self._items.__getitem__(key)
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def __len__(self):
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return len(self._items)
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def __setitem__(self, key, value):
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self._items.__setitem__(key, value)
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self._on_change()
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#--- Override
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def append(self, item):
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self._items.append(item)
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self._on_change()
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def insert(self, index, item):
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self._items.insert(index, item)
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self._on_change()
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def remove(self, row):
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self._items.remove(row)
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self._check_selection_range()
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self._on_change()
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#--- Virtual
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def _on_change(self):
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pass
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#--- Public
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def search_by_prefix(self, prefix):
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prefix = prefix.lower()
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for index, s in enumerate(self):
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if s.lower().startswith(prefix):
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return index
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return -1
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class GUISelectableList(SelectableList, GUIObject):
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#--- View interface
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# refresh()
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# update_selection()
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#
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def __init__(self, items=None):
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SelectableList.__init__(self, items)
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GUIObject.__init__(self)
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def _view_updated(self):
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self.view.refresh()
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def _update_selection(self):
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self.view.update_selection()
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def _on_change(self):
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self.view.refresh()
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