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probepositioner.h

/***************************************************************************
 *   Copyright (C) 2005 by David Saxton                                    *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#ifndef PROBEPOSITIONER_H
#define PROBEPOSITIONER_H

#include <qwidget.h>

class ProbeData;
typedef QMap< int, ProbeData* > ProbeDataMap;

const float probeArrowWidth = 9;
const float probeArrowHeight = 12;

/**
Widget for positioning the output of Probes in the OscilloscopeView
@author David Saxton
*/
00026 class ProbePositioner : public QWidget
{
      Q_OBJECT
      public:
            ProbePositioner(QWidget *parent = 0, const char *name = 0);
            ~ProbePositioner();
            /**
             * Returns the amount of space (height in pixels) that a probe output
             * takes up
             */
            int probeOutputHeight() const;
            /**
             * Returns the probe position (from the top) in pixels that the probe
             * with the given id should be displayed at, or -1 if probe with the
             * given id couldn't be found
             */
            int probePosition( ProbeData *probeData ) const;
            /**
             * Sets the probe position relative to the top of this widget (and hence
             * relative to the top of the oscilloscope view) in pixels
             */
            void setProbePosition( ProbeData *probeData, int position );
            /**
             * Returns the probe at the given position (plus or minus an an arrow),
             * or NULL if none. Records the offset of the position from the mouse
             * in m_probePosOffset.
             */
            ProbeData* probeAtPosition( const QPoint &pos );
            
      public slots:
            void forceRepaint();
            
      protected slots:
            void slotProbeDataRegistered( int id, ProbeData *probe );
            void slotProbeDataUnregistered( int id );
            
      protected:
            virtual void mousePressEvent( QMouseEvent * e );
            virtual void mouseReleaseEvent( QMouseEvent * e );
            virtual void mouseMoveEvent( QMouseEvent * e );
            virtual void paintEvent( QPaintEvent *e );
            virtual void resizeEvent( QResizeEvent *event );
            
            ProbeDataMap m_probeDataMap;
            ProbeData *p_draggedProbe;
            int m_probePosOffset;
            
            bool b_needRedraw;
            QPixmap *m_pixmap;
};

#endif

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