/*****************************************************************
    Panel Library/Electropaint Copyright (c) 1986 David A. Tristram.
    Electropaint (TM) is a Registered U.S. Trademark of Tristram Visual.
    Tristram Visual can be contacted at www.tristram.com.

    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. 
*****************************************************************/
#include <gl.h>
#include <device.h>
#include <panel.h>

Panel
*defpanel1(), *defpanel2();

void (*drawfunc)();
void (*savedfunc)();
long snorkseed;
short col;

main() 
{
    foreground();
    winopen("demo");
    doublebuffer();
    gconfig();

    ortho2(-1.0,1.0,-1.0,1.0);

    defpanel1();
    defpanel2();

    pnl_needredraw();

#ifdef IRIS_4D
    (*drawfunc)();
    for (;;) {
        if (pnl_dopanel()) (*drawfunc)();
	if (pnl_userredraw()) (*drawfunc)();
    }
#else  IRIS_4D
    (*drawfunc)();
    (*drawfunc)();
    for (;;) {
        if (pnl_dopanel()) {
	    do {
		(*drawfunc)();
	    } while (pnl_dopanel());
	    (*drawfunc)();
	    pnl_drawpanel();
	    (*drawfunc)();
	    (*drawfunc)();  /* must have even number here */
	}
	if (pnl_userredraw()) {
	    (*drawfunc)();
	    (*drawfunc)();  /* must have even number here */
	}
	swapbuffers();
    }
#endif IRIS_4D
}

void
setcol(a)
Actuator *a;
{
    if (!strcmp(a->label,"green"))  col=GREEN;
    if (!strcmp(a->label,"cyan"))   col=CYAN;
    if (!strcmp(a->label,"red"))    col=RED;
}

void
cleanexit()
{
    exit(0);
}

void
drawstar()
{
    color(BLACK);
    clear();
    color(col);
    move2(-0.6,-0.7);
    draw2( 0.0, 0.7);
    draw2( 0.6,-0.7);
    draw2(-0.7, 0.2);
    draw2( 0.7, 0.2);
    draw2(-0.6,-0.7);

    swapbuffers();
}

void
drawcross()
{
    color(BLACK);
    clear();
    color(col);
    rect(-0.2,-0.7, 0.2, 0.7);
    rect(-0.7,-0.2, 0.7, 0.2);

    swapbuffers();
}

void
drawsnork()
{
int i;
float x,y;    

    srand(snorkseed);

    color(BLACK);
    clear();
    color(col);
    move2(0.0,0.0);
    for (i=0;i<100;i++) {
	x=(float)(rand()%500-250)/275.0;
	y=(float)(rand()%500-250)/275.0;
	draw2(x,y);
    }

    swapbuffers();
}

void setstar()	  { drawfunc=drawstar; }
void setcross()	  { drawfunc=drawcross; }
void setsnork()	  { drawfunc=drawsnork; }
void savefunc()   { savedfunc=drawfunc; }
void newsnork()	  { 
    setsnork();
    snorkseed+=3;
}
void restorefunc() { drawfunc=savedfunc; }
void setgreen()	  { col=GREEN; }
void setred()	  { col=RED; }
void setcyan()    { col=CYAN; }

Panel
*defpanel1()
{
Panel *p;
Actuator *a;

    p=pnl_mkpanel();
    p->label="colors";

    a=pnl_mkact(pnl_label);
    a->label="color controls";
    a->x=0.0;
    a->y=4.0;
    pnl_addact(a, p);

    a=pnl_mkact(pnl_button);
    a->label="exit";
    a->x=1.0;
    a->y=1.0;
    a->labeltype=PNL_LABEL_BOTTOM;
    a->downfunc=cleanexit;
    pnl_addact(a, p);

    a=pnl_mkact(pnl_radio_button);
    a->label="red";
    a->x=1.0;
    a->y=3.0;
    a->downfunc=setcol;
    a->val=1.0;
    setred();
    pnl_addact(a, p);

    a=pnl_mkact(pnl_radio_button);
    a->label="green";
    a->x=1.0;
    a->y=2.5;
    a->downfunc=setgreen;
    pnl_addact(a, p);

    a=pnl_mkact(pnl_radio_button);
    a->label="cyan";
    a->x=1.0;
    a->y=2.0;
    a->downfunc=setcyan;
    pnl_addact(a, p);

    pnl_endgroup(p);
}

Panel
*defpanel2()
{
Panel *p;
Actuator *a;

    p=pnl_mkpanel();
    p->label="shapes";

    a=pnl_mkact(pnl_label);
    a->label="shape controls";
    a->x=0.0;
    a->y=4.0;
    pnl_addact(a, p);

    a=pnl_mkact(pnl_radio_button);
    a->label="star";
    a->x=1.0;
    a->y=3.0;
    a->downfunc=setstar;
    a->val=1.0;
    setstar();
    pnl_addact(a, p);

    a=pnl_mkact(pnl_radio_button);
    a->label="cross";
    a->x=1.0;
    a->y=2.5;
    a->downfunc=setcross;
    pnl_addact(a, p);

    a=pnl_mkact(pnl_radio_button);
    a->label="snork";
    a->x=1.0;
    a->y=2.0;
    a->downfunc=setsnork;
    pnl_addact(a, p);

    pnl_endgroup(p);

    a=pnl_mkact(pnl_button);
    a->label="newsnork";
    a->x=1.0;
    a->y=1.5;
    a->downfunc=savefunc;
    a->activefunc=newsnork;
    a->upfunc=restorefunc;
    pnl_addact(a, p);
}