---
name: "QwtLegendItemManager"
section: "3"
platform: "linux"
package: "libqwt5-doc"
version: "5.2.3-1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/QwtLegendItemManager"
---

# QwtLegendItemManager(3)

## NAME

QwtLegendItemManager -

## SYNOPSIS

`#include <qwt_legend_itemmanager.h>`

Inherited by **QwtPlotItem**.

### Public Member Functions

**QwtLegendItemManager** ()\
 virtual **~QwtLegendItemManager** ()\
 virtual QWidget \* **legendItem** () const =0\
 virtual void **updateLegend** (**QwtLegend** \*legend) const =0\

## Detailed Description

Abstract API to bind plot items to the legend.

## Member Function Documentation

### virtual QWidget\* QwtLegendItemManager::legendItem () const` [pure virtual]`

Allocate the widget that represents the item on the legend

**Returns:**

Allocated widget

**See also:**

**updateLegend()** QwtLegend()

Implemented in **QwtPlotItem**.

### virtual void QwtLegendItemManager::updateLegend (QwtLegend \*legend) const` [pure virtual]`

Update the widget that represents the item on the legend

**Parameters:**

*legend* Legend

**See also:**

**legendItem()**

Implemented in **QwtPlotCurve**, and **QwtPlotItem**.

## Author

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