qwt_plot_dict.cpp

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#include "qwt_plot_dict.h"
#include <algorithm>

class QwtPlotDict::PrivateData
{
public:

    class ItemList: public QList<QwtPlotItem *>
    {
    public:
        void insertItem( QwtPlotItem *item )
        {
            if ( item == NULL )
                return;

            QList<QwtPlotItem *>::iterator it =
                std::upper_bound( begin(), end(), item, LessZThan() );
            insert( it, item );
        }

        void removeItem( QwtPlotItem *item )
        {
            if ( item == NULL )
                return;

            QList<QwtPlotItem *>::iterator it =
                std::lower_bound( begin(), end(), item, LessZThan() );

            for ( ; it != end(); ++it )
            {
                if ( item == *it )
                {
                    erase( it );
                    break;
                }
            }
        }
    private:
        class LessZThan
        {
        public:
            inline bool operator()( const QwtPlotItem *item1,
                const QwtPlotItem *item2 ) const
            {
                return item1->z() < item2->z();
            }
        };
    };

    ItemList itemList;
    bool autoDelete;
};

QwtPlotDict::QwtPlotDict()
{
    d_data = new QwtPlotDict::PrivateData;
    d_data->autoDelete = true;
}

QwtPlotDict::~QwtPlotDict()
{
    detachItems( QwtPlotItem::Rtti_PlotItem, d_data->autoDelete );
    delete d_data;
}

void QwtPlotDict::setAutoDelete( bool autoDelete )
{
    d_data->autoDelete = autoDelete;
}

bool QwtPlotDict::autoDelete() const
{
    return d_data->autoDelete;
}

void QwtPlotDict::insertItem( QwtPlotItem *item )
{
    d_data->itemList.insertItem( item );
}

void QwtPlotDict::removeItem( QwtPlotItem *item )
{
    d_data->itemList.removeItem( item );
}

void QwtPlotDict::detachItems( int rtti, bool autoDelete )
{
    PrivateData::ItemList list = d_data->itemList;
    QwtPlotItemIterator it = list.constBegin();
    while ( it != list.constEnd() )
    {
        QwtPlotItem *item = *it;

        ++it; // increment before removing item from the list

        if ( rtti == QwtPlotItem::Rtti_PlotItem || item->rtti() == rtti )
        {
            item->attach( NULL );
            if ( autoDelete )
                delete item;
        }
    }
}

const QwtPlotItemList &QwtPlotDict::itemList() const
{
    return d_data->itemList;
}

QwtPlotItemList QwtPlotDict::itemList( int rtti ) const
{
    if ( rtti == QwtPlotItem::Rtti_PlotItem )
        return d_data->itemList;

    QwtPlotItemList items;

    PrivateData::ItemList list = d_data->itemList;
    for ( QwtPlotItemIterator it = list.constBegin(); it != list.constEnd(); ++it )
    {
        QwtPlotItem *item = *it;
        if ( item->rtti() == rtti )
            items += item;
    }

    return items;
}