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65 lines
2.9 KiB
C++
65 lines
2.9 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#pragma once
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#if !defined(Q_MOC_RUN)
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#include <QtCore/QItemSelectionModel>
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#include <AzCore/std/containers/vector.h>
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#endif
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QT_FORWARD_DECLARE_CLASS(QAbstractProxyModel)
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namespace EMotionFX
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{
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// This class is a QItemSelectionModel that syncs through proxy models and maintains
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// selection. In Qt we can have a model being filtered/sorted by proxy models. If the
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// selection model is connected to the original model, the view needs a new selection
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// model that understands the filtering. This class does that conversion.
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// NOTE: this class does not support changing proxy models (anywhere in the chain).
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// The class will have to be recreated with the new proxy model.
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//
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class SelectionProxyModel
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: public QItemSelectionModel
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{
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Q_OBJECT // AUTOMOC
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public:
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SelectionProxyModel(QItemSelectionModel* sourceSelectionModel, QAbstractProxyModel* proxyModel, QObject* parent = nullptr);
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void setCurrentIndex(const QModelIndex &index, QItemSelectionModel::SelectionFlags command) override;
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void select(const QModelIndex &index, QItemSelectionModel::SelectionFlags command) override;
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void select(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command) override;
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void clear() override;
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void reset() override;
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void clearCurrentIndex() override;
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private slots:
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void OnSourceSelectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
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void OnSourceSelectionCurrentChanged(const QModelIndex& current, const QModelIndex& previous);
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void OnProxySelectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
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void OnProxyModelRowsInserted(const QModelIndex& parent, int first, int last);
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private:
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QModelIndex mapFromSource(const QModelIndex& sourceIndex);
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QItemSelection mapFromSource(const QItemSelection& sourceSelection);
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QModelIndex mapToSource(const QModelIndex& targetIndex);
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QItemSelection mapToSource(const QItemSelection& targetSelection);
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// Contains the chain of proxy models that leads us to the real model. The outer-most proxy model
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// comes first and is followed by inner proxy models.
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AZStd::vector<QAbstractProxyModel*> m_proxyModels;
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QItemSelectionModel* m_sourceSelectionModel;
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};
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} // namespace EMotionFX
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