portapack-mayhem/firmware/application/ui_menu.hpp

/*
 * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
 *
 * This file is part of PortaPack.
 *
 * 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, 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __UI_MENU_H__
#define __UI_MENU_H__

#include "ui.hpp"
#include "ui_widget.hpp"
#include "ui_painter.hpp"

#include <cstddef>
#include <string>
#include <functional>

namespace ui {

struct MenuItem {
	std::string text;
	std::function<void(void)> on_select;

	// TODO: Prevent default-constructed MenuItems.
	// I managed to construct a menu with three extra, unspecified menu items
	// in the array that were default constructed...
};

class MenuItemView : public Widget {
public:
	MenuItemView(
		MenuItem item
	) : item { item }
	{
	}

	void paint(Painter& painter) override;

	void select();
	void highlight();
	void unhighlight();

private:
	const MenuItem item;
};

class MenuView : public View {
public:
	std::function<void(void)> on_left;

	MenuView() {
		set_focusable(true);
	}

	~MenuView();

	void add_item(MenuItem item);
	void add_items(std::initializer_list<MenuItem> items);

	void set_parent_rect(const Rect new_parent_rect) override;

	MenuItemView* item_view(size_t index) const;

	size_t highlighted() const;
	bool set_highlighted(const size_t new_value);

	void on_focus() override;
	void on_blur() override;
	bool on_key(const KeyEvent event) override;
	bool on_encoder(const EncoderEvent event) override;
	//bool on_touch(const TouchEvent event) override;

private:
	size_t highlighted_ { 0 };
};

} /* namespace ui */

#endif/*__UI_MENU_H__*/