non/Mixer/DPM.C

182 lines
5.1 KiB
C

/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles */
/* */
/* 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. */
/* */
/* This program 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 General Public License for */
/* more details. */
/* */
/* You should have received a copy of the GNU General Public License along */
/* with This program; see the file COPYING. If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*******************************************************************************/
/* a Digital Peak Meter, either horizontal or vertical. Color is a
gradient from min_color() to max_color(). box() is used to draw the
individual 'lights'. division() controls how many 'lights' there
are. value() is volume in dBFS */
#include "DPM.H"
/* we cache the gradient for (probably excessive) speed */
float DPM::_dim;
Fl_Color DPM::_gradient[128] = { (Fl_Color)-1 };
Fl_Color DPM::_dim_gradient[128];
#include <FL/Fl.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Group.H>
#include <math.h>
#include <stdio.h>
DPM::DPM ( int X, int Y, int W, int H, const char *L ) :
Meter( X, Y, W, H, L )
{
_last_drawn_hi_segment = 0;
pixels_per_segment( 4 );
type( FL_VERTICAL );
resize( X, Y, W, H );
dim( 0.70f );
/* initialize gradients */
if ( DPM::_gradient[ 0 ] == -1 )
DPM::blend( FL_GREEN, FL_RED );
box( FL_ROUNDED_BOX );
}
/* which marks to draw beside meter */
const int marks [] = { -70, -50, -40, -30, -20, -10, -3, 0, 4 };
void
DPM::draw_label ( void )
{
/* dirty hack */
if ( parent()->child( 0 ) == this )
{
fl_font( FL_TIMES, 8 );
fl_color( FL_WHITE );
/* draw marks */
char pat[5];
if ( type() == FL_HORIZONTAL )
{
for ( int i = sizeof( marks ) / sizeof( marks[0] ); i-- ; )
{
sprintf( pat, "%d", marks[ i ] );
int v = w() * deflection( (float)marks[ i ] );
fl_draw( pat, x() + v, (y() + h() + 8), 19, 8, (Fl_Align) (FL_ALIGN_RIGHT | FL_ALIGN_TOP) );
}
}
else
{
for ( int i = sizeof( marks ) / sizeof( marks[0] ); i-- ; )
{
sprintf( pat, "%d", marks[ i ] );
int v = h() * deflection( (float)marks[ i ] );
fl_draw( pat, x() - 20, (y() + h() - 8) - v, 19, 8, (Fl_Align) (FL_ALIGN_RIGHT | FL_ALIGN_TOP) );
}
}
}
}
void
DPM::resize ( int X, int Y, int W, int H )
{
if ( type() == FL_HORIZONTAL )
_segments = W / _pixels_per_segment;
else
_segments = H / _pixels_per_segment;
// _last_drawn_hi_segment = 0;
Fl_Widget::resize( X, Y, W, H );
}
void
DPM::draw ( void )
{
int v = pos( value() );
int pv = pos( peak() );
int bh = h() / _segments;
int bw = w() / _segments;
if ( damage() == FL_DAMAGE_ALL )
draw_label();
const int active = active_r();
int hi, lo;
/* only draw as many segments as necessary */
if ( damage() == FL_DAMAGE_USER1 )
{
if ( v > _last_drawn_hi_segment )
{
hi = v;
lo = _last_drawn_hi_segment;
}
else
{
hi = _last_drawn_hi_segment;
lo = v;
}
}
else
{
lo = 0;
hi = _segments;
}
_last_drawn_hi_segment = v;
for ( int p = lo; p <= hi; p++ )
{
Fl_Color c = DPM::div_color( p );
if ( p > v && p != pv )
c = dim_div_color( p );
if ( ! active )
c = fl_inactive( c );
if ( _pixels_per_segment < 4 )
{
if ( type() == FL_HORIZONTAL )
fl_rectf( x() + (p * bw), y(), bw, h(), c );
else
fl_rectf( x(), y() + h() - (p * bh), w(), bh, c );
}
else
{
if ( type() == FL_HORIZONTAL )
fl_draw_box( box(), x() + (p * bw), y(), bw, h(), c );
else
fl_draw_box( box(), x(), y() + h() - (p * bh), w(), bh, c );
}
/* fl_color( c ); */
/* fl_rectf( x(), y() + h() - (p * bh), w(), bh ); */
/* fl_color( FL_BLACK ); */
/* fl_rect( x(), y() + h() - (p * bh), w(), bh ); */
}
}