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101 lines
3.3 KiB
Python
101 lines
3.3 KiB
Python
# Created By: Virgil Dupras
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# Created On: 2011-09-06
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# Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
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#
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# This software is licensed under the "GPLv3" 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.gnu.org/licenses/gpl-3.0.html
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from PyQt5.QtCore import Qt, QAbstractListModel, QItemSelection, QItemSelectionModel
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class SelectableList(QAbstractListModel):
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def __init__(self, model, view, **kwargs):
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super().__init__(**kwargs)
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self._updating = False
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self.view = view
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self.model = model
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self.view.setModel(self)
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self.model.view = self
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# --- Override
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def data(self, index, role):
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if not index.isValid():
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return None
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# We need EditRole for QComboBoxes with setEditable(True)
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if role in {Qt.DisplayRole, Qt.EditRole}:
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return self.model[index.row()]
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return None
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def rowCount(self, index):
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if index.isValid():
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return 0
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return len(self.model)
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# --- Virtual
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def _updateSelection(self):
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raise NotImplementedError()
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def _restoreSelection(self):
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raise NotImplementedError()
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# --- model --> view
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def refresh(self):
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self._updating = True
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self.beginResetModel()
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self.endResetModel()
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self._updating = False
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self._restoreSelection()
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def update_selection(self):
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self._restoreSelection()
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class ComboboxModel(SelectableList):
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def __init__(self, model, view, **kwargs):
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super().__init__(model, view, **kwargs)
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self.view.currentIndexChanged[int].connect(self.selectionChanged)
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# --- Override
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def _updateSelection(self):
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index = self.view.currentIndex()
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if index != self.model.selected_index:
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self.model.select(index)
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def _restoreSelection(self):
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index = self.model.selected_index
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if index is not None:
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self.view.setCurrentIndex(index)
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# --- Events
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def selectionChanged(self, index):
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if not self._updating:
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self._updateSelection()
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class ListviewModel(SelectableList):
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def __init__(self, model, view, **kwargs):
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super().__init__(model, view, **kwargs)
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self.view.selectionModel().selectionChanged[(QItemSelection, QItemSelection)].connect(self.selectionChanged)
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# --- Override
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def _updateSelection(self):
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new_indexes = [modelIndex.row() for modelIndex in self.view.selectionModel().selectedRows()]
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if new_indexes != self.model.selected_indexes:
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self.model.select(new_indexes)
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def _restoreSelection(self):
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new_selection = QItemSelection()
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for index in self.model.selected_indexes:
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new_selection.select(self.createIndex(index, 0), self.createIndex(index, 0))
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self.view.selectionModel().select(new_selection, QItemSelectionModel.ClearAndSelect)
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if len(new_selection.indexes()):
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current_index = new_selection.indexes()[0]
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self.view.selectionModel().setCurrentIndex(current_index, QItemSelectionModel.Current)
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self.view.scrollTo(current_index)
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# --- Events
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def selectionChanged(self, index):
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if not self._updating:
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self._updateSelection()
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