Jaye Evins
1c902230fe
* Bulk replaced tabs with spaces * Bulk removed trailing whitespace from lines * Replaced c-style comments with c++-style comments in file banners * Replace nested namespace definitions with single concise definitions (C++17), this keeps the indentation more manageable * Cleanup ordering and spacing of include directives * Bulk renaming of header file extensions from '.h' to '.hpp'. * Update CODING-STYLE.md * Update target_compile_features from cxx_std_11 to cxx_std_20. * Refresh .clang-format file. Still needs a lot of tweaking.
127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
// UndoRedoModel.hpp
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//
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// Copyright (C) 2016 Jaye Evins <evins@snaught.com>
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//
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// This file is part of gLabels-qt.
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//
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// gLabels-qt is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// gLabels-qt 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with gLabels-qt. If not, see <http://www.gnu.org/licenses/>.
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//
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#ifndef UndoRedoModel_hpp
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#define UndoRedoModel_hpp
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#include "model/Model.hpp"
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#include <QList>
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#include <QObject>
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#include <QString>
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namespace glabels
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{
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///
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/// UndoRedoModel
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///
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class UndoRedoModel : public QObject
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{
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Q_OBJECT
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/////////////////////////////////
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// Life Cycle
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/////////////////////////////////
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public:
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UndoRedoModel( model::Model* model );
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virtual ~UndoRedoModel() = default;
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/////////////////////////////////
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// Public Methods
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/////////////////////////////////
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public:
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void checkpoint( const QString& description );
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void undo();
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void redo();
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bool canUndo() const;
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bool canRedo() const;
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QString undoDescription() const;
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QString redoDescription() const;
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/////////////////////////////////
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// Slots
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/////////////////////////////////
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private slots:
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void onSelectionChanged();
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/////////////////////////////////
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// Signals
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/////////////////////////////////
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signals:
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void changed();
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/////////////////////////////////
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// Private types
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/////////////////////////////////
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private:
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class State
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{
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public:
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State( model::Model* model, const QString& description );
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~State();
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model::Model* model;
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QString description;
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};
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class Stack
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{
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public:
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Stack();
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~Stack();
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void push( State* state );
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State* pop();
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const State* topState() const;
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bool isEmpty() const;
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void clear();
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private:
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QList<State*> list;
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};
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/////////////////////////////////
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// Private data
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/////////////////////////////////
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private:
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model::Model* mModel;
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Stack mUndoStack;
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Stack mRedoStack;
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bool mNewSelection;
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QString mLastDescription;
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};
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}
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#endif // UndoRedoModel_hpp
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