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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_DATA_H
#define QWT_LEGEND_DATA_H
#include "qwt_global.h"
#include "qwt_text.h"
#include "qwt_graphic.h"
#include <qvariant.h>
#include <qpixmap.h>
#include <qmap.h>
/*!
\brief Attributes of an entry on a legend
QwtLegendData is an abstract container ( like QAbstractModel )
to exchange attributes, that are only known between to
the plot item and the legend.
By overloading QwtPlotItem::legendData() any other set of attributes
could be used, that can be handled by a modified ( or completely
different ) implementation of a legend.
\sa QwtLegend, QwtPlotLegendItem
\note The stockchart example implements a legend as a tree
with checkable items
*/
class QWT_EXPORT QwtLegendData
{
public:
//! Mode defining how a legend entry interacts
enum Mode
{
//! The legend item is not interactive, like a label
ReadOnly,
//! The legend item is clickable, like a push button
Clickable,
//! The legend item is checkable, like a checkable button
Checkable
};
//! Identifier how to interprete a QVariant
enum Role
{
// The value is a Mode
ModeRole,
// The value is a title
TitleRole,
// The value is an icon
IconRole,
// Values < UserRole are reserved for internal use
UserRole = 32
};
QwtLegendData();
~QwtLegendData();
void setValues( const QMap<int, QVariant> & );
const QMap<int, QVariant> &values() const;
void setValue( int role, const QVariant & );
QVariant value( int role ) const;
bool hasRole( int role ) const;
bool isValid() const;
QwtGraphic icon() const;
QwtText title() const;
Mode mode() const;
private:
QMap<int, QVariant> d_map;
};
#endif