RangeSelectorTool.h

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00001 /***************************************************************************
00002     File                 : RangeSelectorTool.h
00003     Project              : QtiPlot
00004     --------------------------------------------------------------------
00005     Copyright            : (C) 2006,2007 by Ion Vasilief,
00006                            Tilman Hoener zu Siederdissen, Knut Franke
00007     Email (use @ for *)  : ion_vasilief*yahoo.fr, thzs*gmx.net,
00008                            knut.franke*gmx.de
00009     Description          : Plot tool for selecting ranges on curves.
00010 
00011  ***************************************************************************/
00012 
00013 /***************************************************************************
00014  *                                                                         *
00015  *  This program is free software; you can redistribute it and/or modify   *
00016  *  it under the terms of the GNU General Public License as published by   *
00017  *  the Free Software Foundation; either version 2 of the License, or      *
00018  *  (at your option) any later version.                                    *
00019  *                                                                         *
00020  *  This program is distributed in the hope that it will be useful,        *
00021  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
00022  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
00023  *  GNU General Public License for more details.                           *
00024  *                                                                         *
00025  *   You should have received a copy of the GNU General Public License     *
00026  *   along with this program; if not, write to the Free Software           *
00027  *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
00028  *   Boston, MA  02110-1301  USA                                           *
00029  *                                                                         *
00030  ***************************************************************************/
00031 #ifndef RANGE_SELECTOR_TOOL_H
00032 #define RANGE_SELECTOR_TOOL_H
00033 
00034 #include "PlotToolInterface.h"
00035 #include <qwt_double_rect.h>
00036 #include <qwt_plot_marker.h>
00037 #include <qwt_plot_picker.h>
00038 
00039 class QwtPlotCurve;
00040 class QPoint;
00041 class QEvent;
00042 
00054 class RangeSelectorTool : public QwtPlotPicker, public PlotToolInterface
00055 {
00056     Q_OBJECT
00057     public:
00058         RangeSelectorTool(Graph *graph, const QObject *status_target=NULL, const char *status_slot="");
00059         virtual ~RangeSelectorTool();
00060         double minXValue() const { return qMin(d_active_marker.xValue(), d_inactive_marker.xValue()); }
00061         double maxXValue() const { return qMax(d_active_marker.xValue(), d_inactive_marker.xValue()); }
00062         int dataSize() const { return qAbs(d_active_point - d_inactive_point); }
00063         virtual bool eventFilter(QObject *obj, QEvent *event);
00064         bool keyEventFilter(QKeyEvent *ke);
00065 
00066         QwtPlotCurve *selectedCurve() const { return d_selected_curve; }
00068         void setSelectedCurve(QwtPlotCurve *curve);
00069 
00070     public slots:
00071         virtual void pointSelected(const QPoint &point);
00072 
00073     signals:
00078         void statusText(const QString&);
00080         void changed();
00081     protected:
00082         virtual void append(const QPoint& point) { pointSelected(point); }
00083         void emitStatusText();
00084         void switchActiveMarker();
00086         void setActivePoint(int index);
00087     private:
00088         QwtPlotMarker d_active_marker, d_inactive_marker;
00089         int d_active_point, d_inactive_point;
00090         QwtPlotCurve *d_selected_curve;
00091 };
00092 
00093 #endif // ifndef RANGE_SELECTOR_TOOL_H
00094 

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