qwt_plot_item_info.h

/******************************************************************************
 * 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_PLOT_ITEM_INFO_H
#define QWT_PLOT_ITEM_INFO_H
 
#include "qwt_global.h"
#include "qwt_plot_dict.h"
 
#include <qrect.h>
#include <qset.h>
#include <qstring.h>
 
class QwtPlot;
class QwtPlotItem;
 
class QWT_EXPORT QwtPlotItemInfo
{
public:
    // Check if item is a QwtPlotSeriesItem subclass
    static bool isSeriesItem(const QwtPlotItem* item);
 
    // Check if item stores QPointF data (curve, bar chart)
    static bool isXYSeriesItem(const QwtPlotItem* item);
 
    // Check if item stores QwtIntervalSample data (interval curve, histogram)
    static bool isIntervalSeriesItem(const QwtPlotItem* item);
 
    // Check if item is a decorator (grid, marker, scale, text label, etc.)
    static bool isDecoratorItem(const QwtPlotItem* item);
 
    // Check if item holds any data series
    static bool isDataItem(const QwtPlotItem* item);
 
    // Get all QwtPlotSeriesItem instances from a plot
    static QwtPlotItemList seriesItems(const QwtPlot* plot);
 
    // Get all QPointF-based series items from a plot
    static QwtPlotItemList xySeriesItems(const QwtPlot* plot);
 
    // Filter items by a single rtti value
    static QwtPlotItemList filterByRtti(const QwtPlot* plot, int rtti);
 
    // Filter items by a set of rtti values
    static QwtPlotItemList filterByRtti(const QwtPlot* plot, const QSet< int >& rttiSet);
 
    // Get all currently visible items
    static QwtPlotItemList visibleItems(const QwtPlot* plot);
 
    // Get the number of data samples, or -1 if not a data item
    static int dataSize(const QwtPlotItem* item);
 
    // Get the bounding rectangle of the data, or an invalid rect if not a data item
    static QRectF dataRect(const QwtPlotItem* item);
 
    // Get a human-readable name for an rtti value
    static QString rttiName(int rtti);
};
 
#endif  // QWT_PLOT_ITEM_INFO_H