1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the Qt Data Visualization module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:GPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU 19 ** General Public License version 3 or (at your option) any later version 20 ** approved by the KDE Free Qt Foundation. The licenses are as published by 21 ** the Free Software Foundation and appearing in the file LICENSE.GPL3 22 ** included in the packaging of this file. Please review the following 23 ** information to ensure the GNU General Public License requirements will 24 ** be met: https://www.gnu.org/licenses/gpl-3.0.html. 25 ** 26 ** $QT_END_LICENSE$ 27 ** 28 ****************************************************************************/ 29 30 #ifndef VARIANTBARDATAPROXY_H 31 #define VARIANTBARDATAPROXY_H 32 33 #include "qbardataproxy.h" 34 #include "variantdataset.h" 35 #include "variantbardatamapping.h" 36 #include <QtCore/QStringList> 37 #include <QtCore/QMap> 38 #include <QtCore/QPointer> 39 40 using namespace QtDataVisualization; 41 42 //! [0] 43 class VariantBarDataProxy : public QBarDataProxy 44 //! [0] 45 { 46 Q_OBJECT 47 48 public: 49 explicit VariantBarDataProxy(); 50 explicit VariantBarDataProxy(VariantDataSet *newSet, VariantBarDataMapping *mapping); 51 virtual ~VariantBarDataProxy(); 52 53 //! [1] 54 // Doesn't gain ownership of the dataset, but does connect to it to listen for data changes. 55 void setDataSet(VariantDataSet *newSet); 56 VariantDataSet *dataSet(); 57 58 // Map key (row, column, value) to value index in data item (VariantItem). 59 // Doesn't gain ownership of mapping, but does connect to it to listen for mapping changes. 60 // Modifying mapping that is set to proxy will trigger dataset re-resolving. 61 void setMapping(VariantBarDataMapping *mapping); 62 VariantBarDataMapping *mapping(); 63 //! [1] 64 65 public Q_SLOTS: 66 void handleItemsAdded(int index, int count); 67 void handleDataCleared(); 68 void handleMappingChanged(); 69 70 private: 71 void resolveDataSet(); 72 73 QPointer<VariantDataSet> m_dataSet; 74 QPointer<VariantBarDataMapping> m_mapping; 75 76 Q_DISABLE_COPY(VariantBarDataProxy) 77 }; 78 79 #endif 80