/*
 *  Draw Mode
 *  ---------
 *  This program illustrates how drawing modes affect ouput of drawing
 *  operations.
 */

#include <graphapp.h>

drawing d = NULL;

int button_width   = 100;
int button_height  = 20;
int spacing        = 10;
int drawing_width  = 450;
int drawing_height = 450;

int mode = 0;
int mode_value[] = {
	Zeros,   	DnorS,  	DandnotS,	notS,
	notDandS,	notD,   	DxorS,   	DnandS,
	DandS,   	DxnorS, 	D,       	DornotS,
	S,       	notDorS,	DorS,    	Ones,
};
char * mode_name[] = {
	"Zeros",   	"DnorS",  	"DandnotS",	"notS",
	"notDandS",	"notD",   	"DxorS",   	"DnandS",
	"DandS",   	"DxnorS", 	"D",       	"DornotS",
	"S",       	"notDorS",	"DorS",    	"Ones",
};
#define number_of_modes ( sizeof(mode_value) / sizeof(mode_value[0]) )

rgb colour = Black;
rgb colour_value[] = {
	Black,    	White,     	Red,    	Green,		Blue,
};
char * colour_name[] = {
	"Black",	"White", 	"Red",   	"Green", 	"Blue",
};
#define number_of_colours ( sizeof(colour_value) / sizeof(colour_value[0]) )

void draw_pattern(drawing d, rect r)
{
	int i, top, bottom, height;
	rect dest_rect;

	/* draw a border inside the drawing area */
	setcolour(Black);
	drawrect(r);
	r = insetr(r, 5);

	/* draw some horizontal bars of colour down the screen */
	for (i=0; i<number_of_colours; i=i+1)
	{
		top    = r.y + r.height * i / number_of_colours;
		bottom = r.y + r.height * (i + 1) / number_of_colours;
		height = bottom - top;

		setcolour(colour_value[i]);
		fillrect(rect(r.x, top, r.width, height));
	}

	/* step the rectangle in a bit */
	r = insetr(r, r.height/number_of_colours/2);

	/* set up the selected drawing mode and colour */
	setcolour(colour);
	setdrawmode(mode);

	/* Draw left side once */
	fillrect(rect(r.x,r.y,r.width/2, r.height));

	/* Draw right side twice */
	fillrect(rect(r.x+r.width/2,r.y,r.width/2,r.height));
	fillrect(rect(r.x+r.width/2,r.y,r.width/2,r.height));
}

void change_colour(radiobutton b)
{
	colour = colour_value[getvalue(b)];
	redraw(d);
}

void change_mode(radiobutton b)
{
	mode = mode_value[getvalue(b)];
	redraw(d);
}

void main(void)
{
	int i;
	int x, y, width, height;
	window w;
	radiobutton mode_buttons[number_of_modes];
	radiobutton colour_buttons[number_of_colours];

	/* create the window */

	width = button_width*2 + spacing*4 + drawing_width;
	height = (button_height + spacing) * number_of_modes + spacing;
	if (height < drawing_height + spacing*2)
		height = drawing_height + spacing*2;

	w = newwindow("Drawing Mode Test", rect(0,0,width,height),
		StandardWindow);

	/* create the colour buttons */

	newradiogroup();

	for (i=0; i<number_of_colours; i=i+1)
	{
		x = spacing;
		y = (spacing + button_height) * i + spacing;
		colour_buttons[i] = newradiobutton(colour_name[i],
			rect(x,y,button_width,button_height), change_colour);
		setvalue(colour_buttons[i], i);
	}
	check(colour_buttons[0]);

	/* create the mode buttons */

	newradiogroup();

	for (i=0; i<number_of_modes; i=i+1)
	{
		x = spacing*2 + button_width;
		y = (spacing + button_height) * i + spacing;
		mode_buttons[i] = newradiobutton(mode_name[i],
			rect(x,y,button_width,button_height), change_mode);
		setvalue(mode_buttons[i], i);
	}
	check(mode_buttons[0]);

	/* create the drawing area */

	x = button_width*2+spacing*3;
	y = spacing;

	d = newdrawing(rect(x, y, drawing_width, drawing_height), draw_pattern);

	/* show the window */

	show(w);

	mainloop();
}