139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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/* Base class for all meters */
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#include <FL/Fl.H>
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#include <FL/Fl_Widget.H>
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#include <FL/Fl_Valuator.H>
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class Meter : public Fl_Valuator
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{
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float _peak;
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float _old_value;
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float _value;
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protected:
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virtual void draw ( void ) = 0;
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virtual int handle ( int m )
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{
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if ( m == FL_PUSH )
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{
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// if ( Fl::event_button3() )
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// hide();
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// else
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reset();
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return 1;
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}
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return Fl_Widget::handle( m );
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}
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float
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deflection ( float db )
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{
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float def = 0.0f;
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if ( db < -70.0f )
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def = 0.0f;
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else if ( db < -60.0f )
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def = ( db + 70.0f ) * 0.25f;
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else if ( db < -50.0f )
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def = ( db + 60.0f ) * 0.5f + 2.5f;
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else if ( db < -40.0f )
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def = ( db + 50.0f ) * 0.75f + 7.5f;
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else if ( db < -30.0f )
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def = ( db + 40.0f ) * 1.5f + 15.0f;
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else if ( db < -20.0f )
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def = ( db + 30.0f ) * 2.0f + 30.0f;
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else if ( db < 6.0f )
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def = ( db + 20.0f ) * 2.5f + 50.0f;
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else
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def = 115.0f;
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return def / 115.0f;
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}
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float old_value ( void ) const { return _old_value; }
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public:
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Meter ( int X, int Y, int W, int H, const char *L = 0 ) :
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Fl_Valuator( X, Y, W, H, L )
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{
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_peak = _value = -80.0f;
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_old_value = 4.0f;
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}
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virtual ~Meter ( ) { }
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void value ( float v )
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{
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if ( _value != v )
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{
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damage( FL_DAMAGE_USER1 );
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_old_value = _value;
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_value = v;
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if ( _value > _peak )
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_peak = _value;
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}
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}
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float value ( void ) const { return _value; }
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float peak ( void ) const { return _peak; }
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void reset ( void ) { _peak = -80.0f; redraw(); }
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};
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#include <FL/Fl_Group.H>
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#include <stdio.h>
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/* ... Extension methods for any group containing only meters. Access
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* via a cast to (Meter_Pack *) */
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class Meter_Pack : public Fl_Group
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{
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public:
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/** return a pointer to the meter for channel /c/ in group of meters /g/ */
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Meter *
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channel ( int c )
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{
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if ( c > children() )
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{
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fprintf( stderr, "no such channel\n" );
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return NULL;
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}
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return (Meter *)child( c );
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}
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int
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channels ( void ) const { return children(); }
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};
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