---
name: "QwtPlotDict"
section: "3"
platform: "linux"
package: "libqwt-doc"
version: "6.1.4-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/QwtPlotDict"
---

# QwtPlotDict(3)

A dictionary for plot items.

## NAME

QwtPlotDict - A dictionary for plot items.

## SYNOPSIS

`#include <qwt_plot_dict.h>`

Inherited by **QwtPlot**.

### 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()**

### QwtPlotDict::~QwtPlotDict ()` [virtual]`

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:**

*rtti* In case of **QwtPlotItem::Rtti\_PlotItem** detach all items otherwise only those items of the type rtti. \
 *autoDelete* If true, delete all detached items

### void QwtPlotDict::insertItem (QwtPlotItem \* item)` [protected]`

Insert a plot item

**Parameters:**

*item* PlotItem

**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:**

*rtti* See **QwtPlotItem::RttiValues**

**See also:**

**QwtPlotItem::rtti()**

### void QwtPlotDict::removeItem (QwtPlotItem \* item)` [protected]`

Remove a plot item

**Parameters:**

*item* PlotItem

**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()**

## Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.