non/Region.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.  */
/*******************************************************************************/

#include "Track.H"
#include "Region.H"
#include "Timeline.H"
#include "Waveform.H"

#include <FL/fl_draw.H>
#include <FL/Fl.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Widget.H>
#include <FL/Fl_Box.H>

#include <stdio.h>

#include <algorithm>
//using  std::algorithm;
using namespace std;

extern Timeline timeline;

Fl_Boxtype Region::_box = FL_PLASTIC_UP_BOX;

void
Region::init ( void )
{

/*     align( FL_ALIGN_INSIDE | FL_ALIGN_LEFT | FL_ALIGN_BOTTOM | FL_ALIGN_CLIP ); */
/*     labeltype( FL_SHADOW_LABEL ); */
/*     labelcolor( FL_WHITE ); */
/*     box( FL_PLASTIC_UP_BOX ); */

    _track = NULL;
    _offset = 0;
    _start = 0;
    _end = 0;
    _scale = 1.0f;
    _clip = NULL;


    _box_color = FL_CYAN;
    _color = FL_BLUE;
}

Region::Region ( const Region & rhs )
{
    _offset = rhs._offset;
    _track  = rhs._track;
    _clip   = rhs._clip;
    _start  = rhs._start;
    _end    = rhs._end;
    _scale  = rhs._scale;
}

Region::Region ( Clip *c )
{
    init();
    _clip = c;
    _end = _clip->length();
}


void
Region::trim ( enum trim_e t, int X )
{
    switch ( t )
    {
        case LEFT:
        {
            int d = X - x();

            long td = timeline.x_to_ts( d );

            if ( td < 0 && _start < 0 - td )
                td = 0 - _start;

            _start += td;

            _offset += td;
            break;
        }
        case RIGHT:
        {
            int d = (x() + w()) - X;
            long td = timeline.x_to_ts( d );

            _end -= td;
            break;
        }
        default:
            return;

    }

    _track->redraw();

}

int
Region::handle ( int m )
{

    static int ox, oy;
    static enum trim_e trimming;

    static bool copied = false;
    static nframes_t os;

    int X = Fl::event_x();
    int Y = Fl::event_y();

    int ret;


    switch ( m )
    {
        case FL_PUSH:
        {

            if ( Fl::event_state() & FL_SHIFT &&
                 ! ( Fl::event_state() & FL_CTRL ))
            {
                switch ( Fl::event_button() )
                {
                    case 1:
                        trim( trimming = LEFT, X );
                        break;
                    case 3:
                        trim( trimming = RIGHT, X );
                        break;

                    default:
                        return 0;

                }
                fl_cursor( FL_CURSOR_WE );
                return 1;
            }
            else
            {
                ox = x() - X;
                oy = y() - Y;

                if ( Fl::event_state() && FL_CTRL )
                {
                    os = _start;
//                    Fl::local_grab( this );
                }


                if ( Fl::event_button() == 2 )
                {
                    normalize();
                    _track->redraw();
                }

                ret = Track_Widget::handle( m );
                return ret | 1;

            }
            break;
        }
        case FL_RELEASE:
            fl_cursor( FL_CURSOR_DEFAULT );
            copied = false;
            trimming = NO;
            //          Fl::release();
            return 1;
        case FL_DRAG:

            if ( Fl::event_state() & FL_SHIFT &&
                 Fl::event_state() & FL_CTRL )
            {
                int d = (ox + X) - x();
                long td = timeline.x_to_ts( d );

                nframes_t W = _end - _start;

                if ( td > 0 && os < td )
                    _start = 0;
                else
                    _start = os - td;

                _end = _start + W;

                _track->redraw();
                return 1;
            }

            if ( Fl::event_state() & FL_SHIFT )
                if ( trimming )
                {
                    trim( trimming, X );
                    return 1;
                }
                else
                    return 0;

            if ( Fl::event_state() & FL_CTRL )
            {
                if ( ! copied )
                {
                    _track->add( new Region( *this ) );
                    copied = true;
                    return 1;
                }
            }

            if ( Y > y() + h() )
            {
                if ( _track->next() )
                    _track->next()->add( this );
            }
            else
                if ( Y < y() )
                {
                    if ( _track->prev() )
                        _track->prev()->add( this );
                }

            _track->redraw();

            ret = Track_Widget::handle( m );
            return ret | 1;


//            _offset = timeline.x_to_ts( x() );

        default:
            return Track_Widget::handle( m );
            break;
    }
}

void
Region::draw_box( int X, int Y, int W, int H )
{
    /* dirty hack to keep the box from flipping to vertical at small sizes */

    fl_push_clip( x(), Y, w(), H );
    fl_draw_box( box(), x() - 10, Y, w() + 50, H, _box_color );
    fl_pop_clip();
}

/* Draw (part of) region. OX is pixel offset from start of timeline, X
   Y W and H are the portion of the widget to draw (arrived at by
   intersection of the clip and relative to OX) */
void
Region::draw ( int X, int Y, int W, int H )
{
    if ( ! ( W > 0 && H > 0 ) )
        return;

    int OX = scroll_x();
    int ox = timeline.ts_to_x( _offset );

    if ( ox > OX + _track->w() ||
         ox < OX && ox + abs_w() < OX )
        return;

    int rw = timeline.ts_to_x( _end - _start );

    nframes_t end = _offset + ( _end - _start );

    /* calculate waveform offset due to scrolling */
    nframes_t offset = 0;
    if ( ox < OX )
    {
        offset = timeline.x_to_ts( OX - ox );

        rw = timeline.ts_to_x( (_end - _start) - offset );
    }

    rw = min( rw, _track->w() );

    int rx = x();

    fl_push_clip( rx, Y, rw, H );

    /* dirty hack to keep the box from flipping to vertical at small sizes */
//    fl_draw_box( box(), rx - 10, Y, rw + 50, H, _box_color );


//    fl_push_clip( x() + Fl::box_dx( box() ), y(), w() - Fl::box_dw( box() ), h() );

    draw_waveform( rx, Y, rw, H, _clip, _start + offset, min( (_end - _start) - offset, _end), _scale, _color );

    timeline.draw_measure_lines( rx, Y, rw, H, _box_color );

    fl_color( FL_BLACK );
    fl_line( rx, Y, rx, Y + H );
    fl_line( rx + rw - 1, Y, rx + rw - 1, Y + H );

    draw_label( _clip->name(), (Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_BOTTOM /*| FL_ALIGN_CLIP*/ | FL_ALIGN_INSIDE) );

    fl_pop_clip();

}


void
Region::normalize ( void )
{
    printf( "normalize: start=%lu end=%lu\n", _start, _end );

    _scale = _clip->peaks()->normalization_factor( _start, _end );
}