qwt_legend_itemmanager.h
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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
*****************************************************************************/
#ifndef QWT_LEGEND_ITEM_MANAGER_H
#define QWT_LEGEND_ITEM_MANAGER_H
#include "qwt_global.h"
class QwtLegend;
class QWidget;
class QRectF;
class QPainter;
/*!
\brief Abstract API to bind plot items to the legend
*/
class QWT_EXPORT QwtLegendItemManager
{
public:
//! Constructor
QwtLegendItemManager()
{
}
//! Destructor
virtual ~QwtLegendItemManager()
{
}
/*!
Update the widget that represents the item on the legend
\param legend Legend
\sa legendItem()
*/
virtual void updateLegend( QwtLegend *legend ) const = 0;
/*!
Allocate the widget that represents the item on the legend
\return Allocated widget
\sa updateLegend() QwtLegend()
*/
virtual QWidget *legendItem() const = 0;
/*!
QwtLegendItem can display an icon-identifier followed
by a text. The icon helps to identify a plot item on
the plot canvas and depends on the type of information,
that is displayed.
The default implementation paints nothing.
*/
virtual void drawLegendIdentifier( QPainter *, const QRectF & ) const
{
}
};
#endif