/*
 *  Menu Check
 *  ----------
 *  Demonstrates the creation of a menubar, menus and menu items.
 *  Each menu item can have a mark placed next to it using the
 *  check function, or removed from next to it using the uncheck
 *  function, just like checkboxes or radio buttons.
 */

#include <graphapp.h>

#define NUM_COLOURS 5

char *colour_name[NUM_COLOURS] = {
	"White", "Black", "Red", "Green", "Blue"
};
rgb colour[NUM_COLOURS] = {
	White, Black, Red, Green, Blue
};
menuitem item[NUM_COLOURS];
rgb which_colour;
window w;

void draw_window(window w, rect r)
{
	drawto(w);
	setcolour(which_colour);
	fillrect(r);
}

void change_colour(menuitem m)
{
	int i;
	int value;

	value = getvalue(m);

	/* uncheck all items in the menu */
	for (i=0; i<NUM_COLOURS; i++)
		uncheck(item[i]);

	/* check this menu item */
	check(m);
	which_colour = colour[value];

	/* redraw the window */
	redraw(w);
}

void quit(menu m)
{
	exitapp();
}

void main(void)
{
	int i;

	w = newwindow("Try the Menu", rect(100,100,500,400), StandardWindow);
	setredraw(w, draw_window);

	newmenubar(NULL);

	newmenu("File");
	newmenuitem("Quit",  'Q', quit);

	newmenu("Colour");
	for (i=0; i<NUM_COLOURS; i++) {
		item[i] = newmenuitem(colour_name[i],  0, change_colour);
		setvalue(item[i], i);
	}

	change_colour(item[NUM_COLOURS-1]);

	show(w);
	mainloop();
}