/*

 *   HDSPMixer

 *    

 *   Copyright (C) 2003 Thomas Charbonnel (thomas@undata.org)

 *    

 *   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; if not, write to the Free Software

 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#pragma implementation

#include "HDSPMixerPan.h"

HDSPMixerPan::HDSPMixerPan(int x, int y, int id, int src):Fl_Widget(x, y, 30, 13)

{

    source = src;

    index = id;

    basew = (HDSPMixerWindow *)window();

    dest =  x_orig = shift_orig = lastpos = lastx = drag = 0;

    for (int i = 0; i < HDSP_MAX_DEST; i++) {

	pos[i] = 0;

    }

}

void HDSPMixerPan::draw()

{ 

    fl_draw_pixmap(Slider2_xpm, x()+(int)(pos[dest]/CF), y());

}

int HDSPMixerPan::handle(int e)

{

    int button3 = Fl::event_button3();

    int shift = Fl::event_shift();

    int ctrl = Fl::event_ctrl();

    int xpos = Fl::event_x()-x();

    switch (e) {

	case FL_PUSH:

	    if (xpos > 0 && xpos < 30) {

		if (ctrl) {

		    pos[dest] = 14*CF;

		} else {

		    pos[dest] = (xpos-1)*CF;

		}

		if (lastx != (int)(pos[dest]/CF)) {

		    redraw();

		    lastx = (int)(pos[dest]/CF);

		}

		if (lastpos != pos[dest]) {

		    basew->setMixer(index, source, dest);

		    sendText();

		    lastpos = pos[dest];

		}

		if (button3) relative->set(28*CF-pos[dest]);

		shift_orig = pos[dest];

		x_orig = xpos;

		basew->checkState();

	    }

	    return 1;

	case FL_DRAG:

	    if (ctrl) {

		pos[dest] = 14*CF;

		shift_orig = pos[dest];

		x_orig = xpos;

	    } else if ((xpos > 0 && xpos < 30) || drag) {

		drag = 1;

		if (shift) {

		    pos[dest] = ((xpos-1)-x_orig)+shift_orig;

		    if (pos[dest] < 0) pos[dest] = 0;

		    if (pos[dest] > 28*CF) pos[dest] = 28*CF;

		} else {

		    if (xpos < 1) {

			pos[dest] = 0;

		    } else if (xpos > 29) {

			pos[dest] = 28*CF;

		    } else {

			pos[dest] = (xpos-1)*CF;

		    }

		    shift_orig = pos[dest];

		    x_orig = xpos;

		}

	    }

	    if (lastpos != pos[dest]) {

		basew->setMixer(index, source, dest);

		sendText();

		lastpos = pos[dest];

	    }

	    if (lastx != (int)(pos[dest]/CF)) {

		redraw();

		lastx = (int)(pos[dest]/CF);

	    }

	    if (button3) relative->set(28*CF-pos[dest]);

	    basew->checkState();

	    return 1;

	case FL_RELEASE:

	    drag = 0;

	    return 1;   

	default :

	    return Fl_Widget::handle(e);

    }

}

void HDSPMixerPan::panToText(char *s) 

{

    double x;

    x = (double)pos[dest] / (double)(28*CF);

    if (pos[dest] < 28*CF/2) {

	x = 1.0 - x;

	snprintf(s, 10, "L %.2f", x);

    } else if (pos[dest] > 28*CF/2) {

	snprintf(s, 10, "R %.2f", x);

    } else {

	snprintf(s, 10, "<C>");

    } 

}

void HDSPMixerPan::sendText() {

    char buf[10];

    panToText(buf);

    ((HDSPMixerIOMixer *)parent())->gain->setText(buf);

}

void HDSPMixerPan::set(int p)

{

    if (pos[dest] != p) {

	pos[dest] = lastpos = p;

	basew->setMixer(index, source, dest);

	sendText();

    }

    if (lastx != (int)(pos[dest]/CF)) {

	lastx = (int)(pos[dest]/CF);

	redraw();

    }

}