| 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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| 2 | * QwtPolar Widget Library
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| 3 | * Copyright (C) 2008 Uwe Rathmann
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| 4 | *
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| 5 | * This library is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the Qwt License, Version 1.0
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| 7 | *****************************************************************************/
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| 8 |
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| 9 | #include "qwt_polar_itemdict.h"
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| 10 |
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| 11 | class QwtPolarItemDict::PrivateData
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| 12 | {
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| 13 | public:
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| 14 | class ItemList: public QList<QwtPolarItem *>
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| 15 | {
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| 16 | public:
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| 17 | void insertItem( QwtPolarItem *item )
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| 18 | {
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| 19 | if ( item == NULL )
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| 20 | return;
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| 21 |
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| 22 | // Unfortunately there is no inSort operation
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| 23 | // for lists in Qt4. The implementation below
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| 24 | // is slow, but there shouldn't be many plot items.
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| 25 |
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| 26 | QList<QwtPolarItem *>::Iterator it;
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| 27 | for ( it = begin(); it != end(); ++it )
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| 28 | {
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| 29 | if ( *it == item )
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| 30 | return;
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| 31 |
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| 32 | if ( ( *it )->z() > item->z() )
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| 33 | {
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| 34 | insert( it, item );
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| 35 | return;
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| 36 | }
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| 37 | }
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| 38 | append( item );
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| 39 | }
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| 40 |
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| 41 | void removeItem( QwtPolarItem *item )
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| 42 | {
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| 43 | if ( item == NULL )
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| 44 | return;
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| 45 |
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| 46 | int i = 0;
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| 47 |
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| 48 | QList<QwtPolarItem *>::Iterator it;
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| 49 | for ( it = begin(); it != end(); ++it )
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| 50 | {
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| 51 | if ( item == *it )
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| 52 | {
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| 53 | removeAt( i );
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| 54 | return;
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| 55 | }
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| 56 | i++;
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| 57 | }
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| 58 | }
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| 59 | };
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| 60 |
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| 61 | ItemList itemList;
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| 62 | bool autoDelete;
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| 63 | };
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| 64 |
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| 65 | /*!
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| 66 | Constructor
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| 67 |
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| 68 | Auto deletion is enabled.
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| 69 | \sa setAutoDelete, attachItem
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| 70 | */
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| 71 | QwtPolarItemDict::QwtPolarItemDict()
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| 72 | {
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| 73 | d_data = new QwtPolarItemDict::PrivateData;
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| 74 | d_data->autoDelete = true;
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| 75 | }
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| 76 |
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| 77 | /*!
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| 78 | Destructor
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| 79 |
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| 80 | If autoDelete is on, all attached items will be deleted
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| 81 | \sa setAutoDelete, autoDelete, attachItem
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| 82 | */
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| 83 | QwtPolarItemDict::~QwtPolarItemDict()
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| 84 | {
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| 85 | detachItems( QwtPolarItem::Rtti_PolarItem, d_data->autoDelete );
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| 86 | delete d_data;
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| 87 | }
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| 88 |
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| 89 | /*!
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| 90 | En/Disable Auto deletion
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| 91 |
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| 92 | If Auto deletion is on all attached plot items will be deleted
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| 93 | in the destructor of QwtPolarItemDict. The default value is on.
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| 94 |
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| 95 | \sa autoDelete, attachItem
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| 96 | */
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| 97 | void QwtPolarItemDict::setAutoDelete( bool autoDelete )
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| 98 | {
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| 99 | d_data->autoDelete = autoDelete;
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| 100 | }
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| 101 |
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| 102 | /*!
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| 103 | \return true if auto deletion is enabled
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| 104 | \sa setAutoDelete, attachItem
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| 105 | */
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| 106 | bool QwtPolarItemDict::autoDelete() const
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| 107 | {
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| 108 | return d_data->autoDelete;
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| 109 | }
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| 110 |
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| 111 | /*!
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| 112 | Attach/Detach a plot item
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| 113 |
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| 114 | Attached items will be deleted in the destructor,
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| 115 | if auto deletion is enabled (default). Manually detached
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| 116 | items are not deleted.
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| 117 |
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| 118 | \param item Plot item to attach/detach
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| 119 | \ on If true attach, else detach the item
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| 120 |
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| 121 | \sa setAutoDelete, ~QwtPolarItemDict
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| 122 | */
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| 123 | void QwtPolarItemDict::attachItem( QwtPolarItem *item, bool on )
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| 124 | {
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| 125 | if ( on )
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| 126 | d_data->itemList.insertItem( item );
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| 127 | else
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| 128 | d_data->itemList.removeItem( item );
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| 129 | }
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| 130 |
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| 131 | /*!
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| 132 | Detach items from the dictionary
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| 133 |
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| 134 | \param rtti In case of QwtPolarItem::Rtti_PlotItem detach all items
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| 135 | otherwise only those items of the type rtti.
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| 136 | \param autoDelete If true, delete all detached items
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| 137 | */
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| 138 | void QwtPolarItemDict::detachItems( int rtti, bool autoDelete )
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| 139 | {
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| 140 | PrivateData::ItemList list = d_data->itemList;
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| 141 | QwtPolarItemIterator it = list.begin();
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| 142 | while ( it != list.end() )
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| 143 | {
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| 144 | QwtPolarItem *item = *it;
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| 145 |
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| 146 | ++it; // increment before removing item from the list
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| 147 |
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| 148 | if ( rtti == QwtPolarItem::Rtti_PolarItem || item->rtti() == rtti )
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| 149 | {
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| 150 | item->attach( NULL );
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| 151 | if ( autoDelete )
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| 152 | delete item;
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| 153 | }
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| 154 | }
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| 155 | }
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| 156 |
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| 157 | /*!
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| 158 | \brief A QwtPolarItemList of all attached plot items.
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| 159 |
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| 160 | \return List of all attached plot items.
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| 161 | \note Use caution when iterating these lists, as removing/detaching
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| 162 | an item will invalidate the iterator.
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| 163 | Instead you can place pointers to objects to be
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| 164 | removed in a removal list, and traverse that list later.
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| 165 | */
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| 166 | const QwtPolarItemList &QwtPolarItemDict::itemList() const
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| 167 | {
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| 168 | return d_data->itemList;
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| 169 | }
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