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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtDataVis3D module.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSCATTERDATAPROXY_H
#define QSCATTERDATAPROXY_H
#include "qabstractdataproxy.h"
#include "qscatterdataitem.h"
QT_DATAVIS3D_BEGIN_NAMESPACE
typedef QVector<QScatterDataItem> QScatterDataArray;
class QScatterDataProxyPrivate;
class QT_DATAVIS3D_EXPORT QScatterDataProxy : public QAbstractDataProxy
{
Q_OBJECT
public:
explicit QScatterDataProxy();
explicit QScatterDataProxy(QScatterDataProxyPrivate *d);
virtual ~QScatterDataProxy();
// QScatterDataProxy is also optimized to use cases where the only defining characteristics of an individual
// map item are it's value and position. Modifying other data such as color or mesh of individual bar
// requires allocating additional data object for the bar.
// If data is accessed from same thread that sets it, access doesn't need to be protected with mutex.
int itemCount();
const QScatterDataArray &array() const;
const QScatterDataItem *itemAt(int index) const; // Index needs to exist or this crashes
// All array/item manipulation functions are internally protected by data mutex.
// TODO: Should we remove internal mutexing and require user to mutex also on data manipulations?
// TODO: Upside would be enabling user to mix data setters and getters within same mutex scope.
// TODO: Downside would be signal emissions from inside the mutex scope, which has potential for deadlock.
// TODO Should data manipulation/access methods be protected rather than public to enforce subclassing use of proxy?
// TODO Leaving them public gives user more options.
// QScatterDataProxy takes ownership of all QScatterDataArrays and QScatterDataItems passed to it.
// Clears the existing array and sets it data to new array.
void resetArray(QScatterDataArray *newArray);
// TODO void setItem(int index, QScatterDataItem *item);
// TODO void setItems(int index, QScatterDataArray *items);
// TODO int addItem(QScatterDataItem *item); // returns the index of added item
// TODO int addItems(QScatterDataArray *items); // returns the index of added item
// TODO void insertItem(int index, QScatterDataItem *item);
// TODO void insertItems(int index, QScatterDataArray *items);
// TODO void removeItems(int index, int removeCount);
signals:
void arrayReset();
void itemsAdded(int startIndex, int count);
void itemsChanged(int startIndex, int count);
void itemsRemoved(int startIndex, int count); // Index may be over current array size if removed from end
void itemsInserted(int startIndex, int count);
protected:
QScatterDataProxyPrivate *dptr();
const QScatterDataProxyPrivate *dptrc() const;
private:
Q_DISABLE_COPY(QScatterDataProxy)
friend class Scatter3DController;
};
QT_DATAVIS3D_END_NAMESPACE
#endif
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