non/mixer/src/Panner.H

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/*******************************************************************************/
/* 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. */
/*******************************************************************************/
#pragma once
#include <FL/Fl_Widget.H>
#include <FL/fl_draw.H>
#include <FL/Fl.H>
#include <math.h>
#include <vector>
using namespace std;
class Panner : public Fl_Widget
{
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void draw_the_box( int, int, int, int );
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struct Point
{
/* axes */
/* distance from center (from 0 to 1) */
float d;
/* angle */
float a;
Point ( ) : d( 0.0f ), a( 0.0f ) { }
Point ( float D, float A ) : d( D ), a( A ) { }
/** translate angle /a/ into x/y coords and place the result in /X/ and /Y/ */
void
axes ( float *X, float *Y ) const
{
/* rotate */
float A = ( 270 - a ) * ( M_PI / 180 );
*X = -d * cosf( A );
*Y = d * sinf( A );
}
float azimuth ( void ) const
{
return a > 180.0f ? a - 360.0f : a;
}
float elevation ( void ) const
{
return ( 1.0f - d ) * 90.0f;
}
void azimuth ( float v )
{
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a = v < 0.0f ? v + 360.0f : v;
a = a < 0.0f ? 0.0f : a > 360.0f ? 360.0f : a;
}
void elevation ( float v )
{
d = 1.0f - ( v / 90.0f );
d = d < 0.0f ? 0.0f : d > 1.0f ? 1.0f : d;
}
/** set point position in X, Y coordinates (0.0 to 1.0) */
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void
angle ( float X1, float Y1 )
{
float X2, Y2;
Y2 = X2 = 0;
float t;
t = atan2( X2 - X1, Y2 - Y1 );
a = t * (180 / M_PI);
if ( a < 0 )
a = 360 + a;
a = 360 - a;
/* standard distance calculation */
d = sqrt( pow( X2 - X1, 2 ) + pow( Y2 - Y1, 2 ) );
if ( d > 1.0f )
d = 1.0f;
}
/** return the distance between the point and that referenced by /p/ */
float
distance ( const Point &p )
{
/* first, transform point coords */
float x1, y1, x2, y2;
axes( &x1, &y1 );
p.axes( &x2, &y2 );
/* standard distance calculation */
return sqrt( pow( x1 - x2, 2 ) + pow( y1 - y2, 2 ) );
}
};
/* channel configuration */
int _ins,
_outs;
bool _bypassed;
vector <Point> _points;
static int pw ( void ) { return 12; }
static int ph ( void ) { return 12; }
static int _configs[][12];
void bbox ( int &X, int &Y, int &W, int &H ) const
{
W = w() - Fl::box_dw( box() );
H = h() - Fl::box_dh( box() );
X = x() + Fl::box_dx( box() );
Y = y() + Fl::box_dy( box() );
}
void point_bbox ( const Point *p, int *X, int *Y, int *W, int *H ) const;
Point * event_point ( void );
Point angle_to_axes ( float a );
enum {
NONE = -1,
R = 90,
L = 270,
C = 0,
FL = 315,
FR = 45,
RL = 225,
RR = 135,
};
static Point * drag;
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protected:
virtual void draw ( void );
virtual int handle ( int );
public:
Panner ( int X, int Y, int W, int H, const char *L = 0 ) :
Fl_Widget( X, Y, W, H, L )
{
_bypassed = false;
_ins = 1;
_outs = 1;
// _ins = _outs = 4;
// _points.push_back( Point( 1, FL ) );
_points.push_back( Point( 1, C ) );
/* _points.push_back( Point( 1, FR ) ); */
/* _points.push_back( Point( 1, RL ) ); */
/* _points.push_back( Point( 1, RR ) ); */
}
virtual ~Panner ( ) { }
Panner::Point *point ( int i );
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};