source: ntrip/branches/BNC_2.12/qwt/qwt_plot_dict.cpp@ 8142

Last change on this file since 8142 was 4271, checked in by mervart, 10 years ago
File size: 4.5 KB
Line 
1/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * Qwt Widget Library
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the Qwt License, Version 1.0
8 *****************************************************************************/
9
10#include "qwt_plot_dict.h"
11
12class QwtPlotDict::PrivateData
13{
14public:
15
16 class ItemList: public QList<QwtPlotItem *>
17 {
18 public:
19 void insertItem( QwtPlotItem *item )
20 {
21 if ( item == NULL )
22 return;
23
24 QList<QwtPlotItem *>::iterator it =
25 qUpperBound( begin(), end(), item, LessZThan() );
26 insert( it, item );
27 }
28
29 void removeItem( QwtPlotItem *item )
30 {
31 if ( item == NULL )
32 return;
33
34 QList<QwtPlotItem *>::iterator it =
35 qLowerBound( begin(), end(), item, LessZThan() );
36
37 for ( ; it != end(); ++it )
38 {
39 if ( item == *it )
40 {
41 erase( it );
42 break;
43 }
44 }
45 }
46 private:
47 class LessZThan
48 {
49 public:
50 inline bool operator()( const QwtPlotItem *item1,
51 const QwtPlotItem *item2 ) const
52 {
53 return item1->z() < item2->z();
54 }
55 };
56 };
57
58 ItemList itemList;
59 bool autoDelete;
60};
61
62/*!
63 Constructor
64
65 Auto deletion is enabled.
66 \sa setAutoDelete(), attachItem()
67*/
68QwtPlotDict::QwtPlotDict()
69{
70 d_data = new QwtPlotDict::PrivateData;
71 d_data->autoDelete = true;
72}
73
74/*!
75 Destructor
76
77 If autoDelete is on, all attached items will be deleted
78 \sa setAutoDelete(), autoDelete(), attachItem()
79*/
80QwtPlotDict::~QwtPlotDict()
81{
82 detachItems( QwtPlotItem::Rtti_PlotItem, d_data->autoDelete );
83 delete d_data;
84}
85
86/*!
87 En/Disable Auto deletion
88
89 If Auto deletion is on all attached plot items will be deleted
90 in the destructor of QwtPlotDict. The default value is on.
91
92 \sa autoDelete(), attachItem()
93*/
94void QwtPlotDict::setAutoDelete( bool autoDelete )
95{
96 d_data->autoDelete = autoDelete;
97}
98
99/*!
100 \return true if auto deletion is enabled
101 \sa setAutoDelete(), attachItem()
102*/
103bool QwtPlotDict::autoDelete() const
104{
105 return d_data->autoDelete;
106}
107
108/*!
109 Attach/Detach a plot item
110
111 Attached items will be deleted in the destructor,
112 if auto deletion is enabled (default). Manually detached
113 items are not deleted.
114
115 \param item Plot item to attach/detach
116 \ on If true attach, else detach the item
117
118 \sa setAutoDelete(), ~QwtPlotDict()
119*/
120void QwtPlotDict::attachItem( QwtPlotItem *item, bool on )
121{
122 if ( on )
123 d_data->itemList.insertItem( item );
124 else
125 d_data->itemList.removeItem( item );
126}
127
128/*!
129 Detach items from the dictionary
130
131 \param rtti In case of QwtPlotItem::Rtti_PlotItem detach all items
132 otherwise only those items of the type rtti.
133 \param autoDelete If true, delete all detached items
134*/
135void QwtPlotDict::detachItems( int rtti, bool autoDelete )
136{
137 PrivateData::ItemList list = d_data->itemList;
138 QwtPlotItemIterator it = list.begin();
139 while ( it != list.end() )
140 {
141 QwtPlotItem *item = *it;
142
143 ++it; // increment before removing item from the list
144
145 if ( rtti == QwtPlotItem::Rtti_PlotItem || item->rtti() == rtti )
146 {
147 item->attach( NULL );
148 if ( autoDelete )
149 delete item;
150 }
151 }
152}
153
154/*!
155 \brief A QwtPlotItemList of all attached plot items.
156
157 Use caution when iterating these lists, as removing/detaching an item will
158 invalidate the iterator. Instead you can place pointers to objects to be
159 removed in a removal list, and traverse that list later.
160
161 \return List of all attached plot items.
162*/
163const QwtPlotItemList &QwtPlotDict::itemList() const
164{
165 return d_data->itemList;
166}
167
168/*!
169 \return List of all attached plot items of a specific type.
170 \sa QwtPlotItem::rtti()
171*/
172QwtPlotItemList QwtPlotDict::itemList( int rtti ) const
173{
174 if ( rtti == QwtPlotItem::Rtti_PlotItem )
175 return d_data->itemList;
176
177 QwtPlotItemList items;
178
179 PrivateData::ItemList list = d_data->itemList;
180 for ( QwtPlotItemIterator it = list.begin(); it != list.end(); ++it )
181 {
182 QwtPlotItem *item = *it;
183 if ( item->rtti() == rtti )
184 items += item;
185 }
186
187 return items;
188}
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