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