ExternalAxisWidget.h

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//# Copyright (C) 2005
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//#        Internet email: aips2-request@nrao.edu.
//#        Postal address: AIPS++ Project Office
//#                        National Radio Astronomy Observatory
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#ifndef CASAQT_EXTERNALAXIS_WIDGET_H_
#define CASAQT_EXTERNALAXIS_WIDGET_H_
#include <casaqt/QwtPlotter/QPOptions.h>
#include <casa/BasicSL/String.h>
#include <QWidget>
#include <qwt_plot.h>


namespace casa {

class QPScaleDraw;

class ExternalAxisWidget : public QWidget {
public:
        ExternalAxisWidget(QWidget* parent, QwtPlot* plot,
                        bool leftAxisInternal, bool bottomAxisInternal,
                        bool rightAxisInternal );
        void setAxisLabel( const QString& label );
        QString getAxisLabel() const;

        virtual void paintEvent( QPaintEvent* event );
        void print( QPainter* painter, QRect imageRect );

        //Date formats
        void setDateFormat(const String& newFormat);
        void setRelativeDateFormat(const String& newFormat);

        //Axis scale
        void setAxisScale(PlotAxisScale scale);
        void setReferenceValue(bool on, double value);

        //Axis font
        void setAxisFont(const QFont& font);

        virtual ~ExternalAxisWidget();

protected:
        virtual void drawTicks( QPainter* painter, int tickLength ) = 0;
        virtual void defineAxis( QLine& axisLine ) = 0;
        virtual void drawAxisLabel( QPainter* painter ) = 0;
        virtual int getAxisLength() const = 0;
        virtual int getCanvasHeight() const;
        virtual int getCanvasWidth() const;
        virtual int getStartY() const;
        virtual int getStartX() const;
        virtual int getEndY() const;

        int getTickIncrement( int tickCount ) const;
        double getTickStartPixel( QwtPlot::Axis axis );
        double getTickDistance( QwtPlot::Axis axis );
        double getTickIncrement( double tickDistance, QwtPlot::Axis axis );

        QString formatLabel( double value ) const;

        QwtPlot* plot;
        QPScaleDraw* scaleDraw;
        QString axisLabel;
        QwtPlot::Axis plotAxis;

        //Which axis are internal (drawn by the Qwt plot)
        bool leftAxisInternal;
        bool bottomAxisInternal;
        bool rightAxisInternal;

        const int AXIS_SMALL_SIDE;
        const int TICK_LENGTH;
        const int MARGIN;
        const int MIN_START_Y;

private:
        void drawBackBone( QPainter* painter );
        void drawTicks( QPainter* painter );
        void drawLabel( QPainter* painter );
        QFont axisFont;

};

} /* namespace casa */
#endif /* EXTERNALAXIS_WIDGET_H_ */