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Diffstat (limited to 'src/datavisualization/data/qbardataproxy.h')
-rw-r--r-- | src/datavisualization/data/qbardataproxy.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/src/datavisualization/data/qbardataproxy.h b/src/datavisualization/data/qbardataproxy.h new file mode 100644 index 00000000..8ebaf5ae --- /dev/null +++ b/src/datavisualization/data/qbardataproxy.h @@ -0,0 +1,109 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc +** All rights reserved. +** For any questions to Digia, please use contact form at http://qt.digia.com +** +** This file is part of the QtDataVisualization module. +** +** Licensees holding valid Qt Enterprise licenses may use this file in +** accordance with the Qt Enterprise License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. +** +** If you have questions regarding the use of this file, please use +** contact form at http://qt.digia.com +** +****************************************************************************/ + +#ifndef QBARDATAPROXY_H +#define QBARDATAPROXY_H + +#include <QtDataVisualization/qabstractdataproxy.h> +#include <QtDataVisualization/qbardataitem.h> +#include <QVector> + +QT_DATAVISUALIZATION_BEGIN_NAMESPACE + +typedef QVector<QBarDataItem> QBarDataRow; +typedef QList<QBarDataRow *> QBarDataArray; + +class QBarDataProxyPrivate; + +class QT_DATAVISUALIZATION_EXPORT QBarDataProxy : public QAbstractDataProxy +{ + Q_OBJECT + + Q_PROPERTY(int rowCount READ rowCount) +public: + explicit QBarDataProxy(QObject *parent = 0); + virtual ~QBarDataProxy(); + + // TODO: Replace first part of class description in docs with this once all TODOs are done: + /* + * QBarDataProxy is optimized for adding, inserting, and removing rows of data. + * Adding a column essentially means modifying every row, which is comparatively very inefficient. + * Proxy is also optimized to use cases where the only defining characteristic of an individual + * bar is its value. Modifying other data that might be added in the future such as color of + * individual bar requires allocating additional data object for the bar. + */ + + int rowCount() const; + const QBarDataArray *array() const; + const QBarDataRow *rowAt(int rowIndex) const; + const QBarDataItem *itemAt(int rowIndex, int columnIndex) const; + + void resetArray(QBarDataArray *newArray); + + void setRow(int rowIndex, QBarDataRow *row); + void setRows(int rowIndex, const QBarDataArray &rows); + + // Setting a column is comparatively inefficient as it changes all rows. + // Can resize rows that are shorter than columnIndex. + // TODO void setColumn(int columnIndex, const QBarDataRow &column); + // TODO void setColumns(int columnIndex, const QBarDataArray &columns); + + void setItem(int rowIndex, int columnIndex, const QBarDataItem &item); + // Change block of items + // TODO setItems(int rowIndex, int columnIndex, QBarDataArray *items); + + int addRow(QBarDataRow *row); + int addRows(const QBarDataArray &rows); + // TODO int addColumn(const QBarDataRow &column); // returns the index of the added column + // TODO int addColumns(const QBarDataArray &columns); // returns the index of the first added column + + void insertRow(int rowIndex, QBarDataRow *row); + void insertRows(int rowIndex, const QBarDataArray &rows); + // TODO void insertColumn(int columnIndex, const QBarDataRow &column); + // TODO void insertColumns(int columnIndex, const QBarDataArray &columns); + + void removeRows(int rowIndex, int removeCount); + // TODO void removeColumns(int columnIndex, int removeCount); + +signals: + void arrayReset(); + void rowsAdded(int startIndex, int count); + void rowsChanged(int startIndex, int count); + void rowsRemoved(int startIndex, int count); + void rowsInserted(int startIndex, int count); + // TODO void columnsChanged(int startIndex, int count); + // TODO void columnsAdded(int startIndex, int count); + // TODO void columnsRemoved(int startIndex, int count); + // TODO void columnsInserted(int startIndex, int count); + void itemChanged(int rowIndex, int columnIndex); // TODO remove once itemsChanged is added? + // TODO void itemsChanged(int rowIndex, int columnIndex, int rowCount, int columnCount); + +protected: + explicit QBarDataProxy(QBarDataProxyPrivate *d, QObject *parent = 0); + QBarDataProxyPrivate *dptr(); + const QBarDataProxyPrivate *dptrc() const; + +private: + Q_DISABLE_COPY(QBarDataProxy) + + friend class Bars3DController; +}; + +QT_DATAVISUALIZATION_END_NAMESPACE + +#endif // QBARDATAPROXY_H |