彻底改版2.0

third/3rd_qwt/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"
+
+class QwtPlotDict::PrivateData
+{
+public:
+
+    class ItemList: public QList<QwtPlotItem *>
+    {
+    public:
+        void insertItem( QwtPlotItem *item )
+        {
+            if ( item == NULL )
+                return;
+
+            QList<QwtPlotItem *>::iterator it =
+                qUpperBound( begin(), end(), item, LessZThan() );
+            insert( it, item );
+        }
+
+        void removeItem( QwtPlotItem *item )
+        {
+            if ( item == NULL )
+                return;
+
+            QList<QwtPlotItem *>::iterator it =
+                qLowerBound( 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;
+};
+
+/*!
+   Constructor
+
+   Auto deletion is enabled.
+   \sa setAutoDelete(), QwtPlotItem::attach()
+*/
+QwtPlotDict::QwtPlotDict()
+{
+    d_data = new QwtPlotDict::PrivateData;
+    d_data->autoDelete = true;
+}
+
+/*!
+   Destructor
+
+   If autoDelete() is on, all attached items will be deleted
+   \sa setAutoDelete(), autoDelete(), QwtPlotItem::attach()
+*/
+QwtPlotDict::~QwtPlotDict()
+{
+    detachItems( QwtPlotItem::Rtti_PlotItem, d_data->autoDelete );
+    delete d_data;
+}
+
+/*!
+   En/Disable Auto deletion
+
+   If Auto deletion is on all attached plot items will be deleted
+   in the destructor of QwtPlotDict. The default value is on.
+
+   \sa autoDelete(), insertItem()
+*/
+void QwtPlotDict::setAutoDelete( bool autoDelete )
+{
+    d_data->autoDelete = autoDelete;
+}
+
+/*!
+   \return true if auto deletion is enabled
+   \sa setAutoDelete(), insertItem()
+*/
+bool QwtPlotDict::autoDelete() const
+{
+    return d_data->autoDelete;
+}
+
+/*!
+  Insert a plot item
+
+  \param item PlotItem
+  \sa removeItem()
+ */
+void QwtPlotDict::insertItem( QwtPlotItem *item )
+{
+    d_data->itemList.insertItem( item );
+}
+
+/*!
+  Remove a plot item
+
+  \param item PlotItem
+  \sa insertItem()
+ */
+void QwtPlotDict::removeItem( QwtPlotItem *item )
+{
+    d_data->itemList.removeItem( item );
+}
+
+/*!
+   Detach items from the dictionary
+
+   \param rtti In case of QwtPlotItem::Rtti_PlotItem detach all items
+               otherwise only those items of the type rtti.
+   \param autoDelete If true, delete all detached items
+*/
+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;
+        }
+    }
+}
+
+/*!
+  \brief A QwtPlotItemList of all attached plot items.
+
+  Use caution when iterating these lists, as removing/detaching an item will
+  invalidate the iterator. Instead you can place pointers to objects to be
+  removed in a removal list, and traverse that list later.
+
+  \return List of all attached plot items.
+*/
+const QwtPlotItemList &QwtPlotDict::itemList() const
+{
+    return d_data->itemList;
+}
+
+/*!
+  \return List of all attached plot items of a specific type.
+  \param rtti See QwtPlotItem::RttiValues
+  \sa QwtPlotItem::rtti()
+*/
+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;
+}