Qwt User's Guide
QwtPlotDict Class Reference

A dictionary for plot items. More...

#include <qwt_plot_dict.h>

Inheritance diagram for QwtPlotDict:

Public Member Functions

 QwtPlotDict ()
virtual ~QwtPlotDict ()
void setAutoDelete (bool)
bool autoDelete () const
const QwtPlotItemList & itemList () const
 A QwtPlotItemList of all attached plot items.
QwtPlotItemList itemList (int rtti) const
void detachItems (int rtti=QwtPlotItem::Rtti_PlotItem, bool autoDelete=true)

Protected Member Functions

void insertItem (QwtPlotItem *)
void removeItem (QwtPlotItem *)

Detailed Description

A dictionary for plot items.

QwtPlotDict organizes plot items in increasing z-order. If autoDelete() is enabled, all attached items will be deleted in the destructor of the dictionary. QwtPlotDict can be used to get access to all QwtPlotItem items - or all items of a specific type - that are currently on the plot.

See also:
QwtPlotItem::attach(), QwtPlotItem::detach(), QwtPlotItem::z()

Constructor & Destructor Documentation

QwtPlotDict::QwtPlotDict ( ) [explicit]

Constructor

Auto deletion is enabled.

See also:
setAutoDelete(), QwtPlotItem::attach()

Destructor

If autoDelete() is on, all attached items will be deleted

See also:
setAutoDelete(), autoDelete(), QwtPlotItem::attach()

Member Function Documentation

bool QwtPlotDict::autoDelete ( ) const
Returns:
true if auto deletion is enabled
See also:
setAutoDelete(), insertItem()
void QwtPlotDict::detachItems ( int  rtti = QwtPlotItem::Rtti_PlotItem,
bool  autoDelete = true 
)

Detach items from the dictionary

Parameters:
rttiIn case of QwtPlotItem::Rtti_PlotItem detach all items otherwise only those items of the type rtti.
autoDeleteIf true, delete all detached items
void QwtPlotDict::insertItem ( QwtPlotItem item) [protected]

Insert a plot item

Parameters:
itemPlotItem
See also:
removeItem()
const QwtPlotItemList & QwtPlotDict::itemList ( ) const

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.

Returns:
List of all attached plot items.
QwtPlotItemList QwtPlotDict::itemList ( int  rtti) const
Returns:
List of all attached plot items of a specific type.
Parameters:
rttiSee QwtPlotItem::RttiValues
See also:
QwtPlotItem::rtti()
void QwtPlotDict::removeItem ( QwtPlotItem item) [protected]

Remove a plot item

Parameters:
itemPlotItem
See also:
insertItem()
void QwtPlotDict::setAutoDelete ( bool  autoDelete)

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.

See also:
autoDelete(), insertItem()

List of all members.

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