Pixel-Composer/scripts/buttonGroup/buttonGroup.gml

function buttonGroup(_data, _onClick) {
	return new buttonGroupClass(_data, _onClick);
}

function buttonGroupClass(_data, _onClick) : widget() constructor {
	data    = _data;
	onClick = _onClick;
	display_button = false;
	
	current_selecting = 0;
	
	for(var i = 0; i < array_length(data); i++) 
		buttons[i] = button(-1);
	
	sb_small = new scrollBox(data, _onClick);
	
	static trigger = function() {
		if(current_selecting + 1 >= array_length(data))
			onClick(0);
		else
			onClick(current_selecting + 1);
	}
	
	static setInteract = function(interactable = noone) { 
		self.interactable = interactable;
		for(var i = 0; i < array_length(data); i++) 
			buttons[i].interactable = interactable;
		sb_small.interactable = interactable;
	}
	
	static register = function(parent = noone) { 
		if(display_button) {
			array_push(WIDGET_ACTIVE, self); 
			self.parent = parent;
		} else
			sb_small.register(parent);
	}
	
	static draw = function(_x, _y, _w, _h, _selecting, _m, _rx = 0, _ry = 0) {
		x = _x;
		y = _y;
		w = _w;
		h = _h;
		current_selecting = _selecting;
		
		var amo = array_length(data);
		var ww  = _w / amo;
		
		var total_width = 0;
		draw_set_font(f_p0);
		for(var i = 0; i < amo; i++) {
			if(is_string(data[i]))
				total_width += string_width(data[i]) + ui(32);
		}
		
		display_button = total_width < _w;
		
		if(display_button) {
			for(var i = 0; i < amo; i++) {
				buttons[i].hover  = hover;
				buttons[i].active = active;
			
				var bx  = _x + ww * i;
				var spr = i == 0 ? THEME.button_left : (i == amo - 1? THEME.button_right : THEME.button_middle);
			
				if(_selecting == i)
					draw_sprite_stretched(spr, 2, bx, _y, ww, _h);	
				else if(buttons[i].draw(bx, _y, ww, _h, _m, spr))
					onClick(i);
			
				if(is_string(data[i])) {
					draw_set_text(f_p0, fa_center, fa_center, COLORS._main_text);
					draw_text(bx + ww / 2, _y + _h / 2, data[i]);
				} else if(sprite_exists(data[i])) {
					draw_sprite_ui_uniform(data[i], i, bx + ww / 2, _y + _h / 2);
				}
			}
			
			if(point_in_rectangle(_m[0], _m[1], _x, _y, _x + w, _y + _h)) {
				if(is_array(data) && key_mod_press(SHIFT)) {
					var len = array_length(data);
					if(len) {
						if(mouse_wheel_down())	onClick((_selecting + 1 + len) % len);
						if(mouse_wheel_up())	onClick((_selecting - 1 + len) % len);
					}
				}
			}
		} else {
			sb_small.hover = hover;
			sb_small.active = active;
			sb_small.draw(_x, _y, _w, _h, data[_selecting], _m, _rx, _ry);
		}
		
		if(WIDGET_CURRENT == self)
			draw_sprite_stretched(THEME.widget_selecting, 0, x - ui(3), y - ui(3), w + ui(6), h + ui(6));	
		
		resetFocus();
	}
}