Qwt User's Guide: qwt_plot_dict.cpp Source File

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# qwt_plot_dict.cpp

    00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
    00002  * Qwt Widget Library
    00003  * Copyright (C) 1997   Josef Wilgen
    00004  * Copyright (C) 2002   Uwe Rathmann
    00005  *
    00006  * This library is free software; you can redistribute it and/or
    00007  * modify it under the terms of the Qwt License, Version 1.0
    00008  *****************************************************************************/
    00009
    00010 // vim: expandtab
    00011
    00012 #include "qwt_plot_dict.h"
    00013
    00014 class QwtPlotDict::PrivateData
    00015 {
    00016 public:
    00017
    00018 #if QT_VERSION < 0x040000
    00019     class ItemList: public QValueList<QwtPlotItem *>
    00020 #else
    00021     class ItemList: public QList<QwtPlotItem *>
    00022 #endif
    00023     {
    00024     public:
    00025         void insertItem(QwtPlotItem *item)
    00026         {
    00027             if ( item == NULL )
    00028                 return;
    00029
    00030             // Unfortunately there is no inSort operation
    00031             // for lists in Qt4. The implementation below
    00032             // is slow, but there shouldn't be many plot items.
    00033
    00034 #ifdef __GNUC__
    00035 #endif
    00036
    00037 #if QT_VERSION < 0x040000
    00038             QValueListIterator<QwtPlotItem *> it;
    00039 #else
    00040             QList<QwtPlotItem *>::Iterator it;
    00041 #endif
    00042             for ( it = begin(); it != end(); ++it )
    00043             {
    00044                 if ( *it == item )
    00045                     return;
    00046
    00047                 if ( (*it)->z() > item->z() )
    00048                 {
    00049                     insert(it, item);
    00050                     return;
    00051                 }
    00052             }
    00053             append(item);
    00054         }
    00055
    00056         void removeItem(QwtPlotItem *item)
    00057         {
    00058             if ( item == NULL )
    00059                 return;
    00060
    00061             int i = 0;
    00062
    00063 #if QT_VERSION < 0x040000
    00064             QValueListIterator<QwtPlotItem *> it;
    00065 #else
    00066             QList<QwtPlotItem *>::Iterator it;
    00067 #endif
    00068             for ( it = begin(); it != end(); ++it )
    00069             {
    00070                 if ( item == *it )
    00071                 {
    00072 #if QT_VERSION < 0x040000
    00073                     remove(it);
    00074 #else
    00075                     removeAt(i);
    00076 #endif
    00077                     return;
    00078                 }
    00079                 i++;
    00080             }
    00081         }
    00082     };
    00083
    00084     ItemList itemList;
    00085     bool autoDelete;
    00086 };
    00087
    00094 QwtPlotDict::QwtPlotDict()
    00095 {
    00096     d_data = new QwtPlotDict::PrivateData;
    00097     d_data->autoDelete = true;
    00098 }
    00099
    00106 QwtPlotDict::~QwtPlotDict()
    00107 {
    00108     detachItems(QwtPlotItem::Rtti_PlotItem, d_data->autoDelete);
    00109     delete d_data;
    00110 }
    00111
    00120 void QwtPlotDict::setAutoDelete(bool autoDelete)
    00121 {
    00122     d_data->autoDelete = autoDelete;
    00123 }
    00124
    00129 bool QwtPlotDict::autoDelete() const
    00130 {
    00131     return d_data->autoDelete;
    00132 }
    00133
    00146 void QwtPlotDict::attachItem(QwtPlotItem *item, bool on)
    00147 {
    00148     if ( on )
    00149         d_data->itemList.insertItem(item);
    00150     else
    00151         d_data->itemList.removeItem(item);
    00152 }
    00153
    00161 void QwtPlotDict::detachItems(int rtti, bool autoDelete)
    00162 {
    00163     PrivateData::ItemList list = d_data->itemList;
    00164     QwtPlotItemIterator it = list.begin();
    00165     while ( it != list.end() )
    00166     {
    00167         QwtPlotItem *item = *it;
    00168
    00169         ++it; // increment before removing item from the list
    00170
    00171         if ( rtti == QwtPlotItem::Rtti_PlotItem || item->rtti() == rtti )
    00172         {
    00173             item->attach(NULL);
    00174             if ( autoDelete )
    00175                 delete item;
    00176         }
    00177     }
    00178 }
    00179
    00186 const QwtPlotItemList &QwtPlotDict::itemList() const
    00187 {
    00188     return d_data->itemList;
    00189 }