138 lines
4.0 KiB
C
138 lines
4.0 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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/* a Digital Peak Meter, either horizontal or vertical. Color is a
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gradient from min_color() to max_color(). box() is used to draw the
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individual 'lights'. division() controls how many 'lights' there
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are. value() is volume in dBFS */
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#include "DPM.H"
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/* we cache the gradient for (probably excessive) speed */
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float DPM::_dim;
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Fl_Color DPM::_gradient[128] = { (Fl_Color)-1 };
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Fl_Color DPM::_dim_gradient[128];
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#include <FL/Fl.H>
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#include <FL/fl_draw.H>
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#include <FL/Fl_Group.H>
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#include <math.h>
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#include <stdio.h>
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DPM::DPM ( int X, int Y, int W, int H, const char *L ) :
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Meter( X, Y, W, H, L )
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{
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segments( 64 );
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type( FL_VERTICAL );
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dim( 0.70f );
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/* initialize gradients */
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if ( DPM::_gradient[ 0 ] == -1 )
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DPM::blend( FL_GREEN, FL_RED );
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box( FL_ROUNDED_BOX );
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}
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/* which marks to draw beside meter */
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const int marks [] = { -70, -50, -40, -30, -20, -10, -3, 0, 4 };
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void
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DPM::draw_label ( void )
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{
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/* dirty hack */
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if ( parent()->child( 0 ) == this )
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{
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fl_font( FL_TIMES, 8 );
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fl_color( FL_WHITE );
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/* draw marks */
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for ( int i = sizeof( marks ) / sizeof( marks[0] ); i-- ; )
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{
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char pat[5];
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sprintf( pat, "%d", marks[ i ] );
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int v = h() * deflection( (float)marks[ i ] );
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fl_draw( pat, x() - 20, (y() + h() - 8) - v, 19, 8, (Fl_Align) (FL_ALIGN_RIGHT | FL_ALIGN_TOP) );
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}
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}
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}
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void
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DPM::draw ( void )
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{
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int v = pos( value() );
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int pv = pos( peak() );
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int bh = h() / _segments;
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int bw = w() / _segments;
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if ( damage() == FL_DAMAGE_ALL )
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draw_label();
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const int active = active_r();
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int hi, lo;
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/* only draw as many segments as necessary */
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if ( damage() == FL_DAMAGE_USER1 )
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{
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if ( old_value() > value() )
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{
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hi = pos( old_value() );
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lo = v;
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}
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else
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{
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hi = v;
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lo = pos( old_value() );
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}
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}
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else
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{
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lo = 0;
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hi = _segments;
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}
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for ( int p = hi; p > lo; p-- )
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{
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Fl_Color c = DPM::div_color( p );
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if ( p > v && p != pv )
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c = dim_div_color( p );
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if ( ! active )
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c = fl_inactive( c );
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if ( type() == FL_HORIZONTAL )
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fl_draw_box( box(), x() + (p * bw), y(), bw, h(), c );
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else
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fl_draw_box( box(), x(), y() + h() - (p * bh), w(), bh, c );
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/* fl_color( c ); */
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/* fl_rectf( x(), y() + h() - (p * bh), w(), bh ); */
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/* fl_color( FL_BLACK ); */
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/* fl_rect( x(), y() + h() - (p * bh), w(), bh ); */
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}
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}
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