drawing.hpp

/*
   Copyright (C) 2010 - 2017 by Mark de Wever <koraq@xs4all.nl>
   Part of the Battle for Wesnoth Project http://www.wesnoth.org/

   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.

   See the COPYING file for more details.
*/

#pragma once

#include "gui/widgets/styled_widget.hpp"

#include "gui/core/widget_definition.hpp"
#include "gui/core/window_builder.hpp"

class config;

namespace gui2
{
namespace implementation
{
	struct builder_drawing;
}
// ------------ WIDGET -----------{

/**
 * A widget to draw upon.
 *
 * This widget has a fixed size like the spacer, but allows the user to
 * manual draw items. The widget is display only.
 */
class drawing : public styled_widget
{
public:
	explicit drawing(const implementation::builder_drawing& builder);

	canvas& get_drawing_canvas()
	{
		return get_canvas(0);
	}

	void set_drawing_data(const ::config& cfg)
	{
		get_drawing_canvas().set_cfg(cfg);
	}

	void append_drawing_data(const ::config& cfg)
	{
		get_drawing_canvas().append_cfg(cfg);
	}

	/***** ***** ***** ***** layout functions ***** ***** ***** *****/

	/** See @ref widget::request_reduce_width. */
	virtual void request_reduce_width(const unsigned maximum_width) override;

	/** See @ref widget::request_reduce_height. */
	virtual void request_reduce_height(const unsigned maximum_height) override;

private:
	/** See @ref widget::calculate_best_size. */
	virtual point calculate_best_size() const override;

public:
	/***** ***** ***** ***** Inherited ***** ***** ***** *****/

	/** See @ref styled_widget::set_active. */
	virtual void set_active(const bool active) override;

	/** See @ref styled_widget::get_active. */
	virtual bool get_active() const override;

	/** See @ref styled_widget::get_state. */
	virtual unsigned get_state() const override;

	/** See @ref widget::disable_click_dismiss. */
	bool disable_click_dismiss() const override;

	/***** ***** ***** setters / getters for members ***** ****** *****/

	void set_best_size(const point& best_size)
	{
		best_size_ = best_size;
	}

private:
	/**
	 * Possible states of the widget.
	 *
	 * Note the order of the states must be the same as defined in
	 * settings.hpp.
	 */
	enum state_t {
		ENABLED,
	};

	/** When we're used as a fixed size item, this holds the best size. */
	point best_size_;

	/** Inherited from styled_widget, implemented by REGISTER_WIDGET. */
	virtual const std::string& get_control_type() const override;
};

// }---------- DEFINITION ---------{

struct drawing_definition : public styled_widget_definition
{
	explicit drawing_definition(const config& cfg);

	struct resolution : public resolution_definition
	{
		explicit resolution(const config& cfg);
	};
};

// }---------- BUILDER -----------{

namespace implementation
{

struct builder_drawing : public builder_styled_widget
{
	explicit builder_drawing(const config& cfg);

	using builder_styled_widget::build;

	widget* build() const;

	/** The width of the widget. */
	typed_formula<unsigned> width;

	/** The height of the widget. */
	typed_formula<unsigned> height;

	/** Config containing what to draw on the widgets canvas. */
	config draw;
};

} // namespace implementation

// }------------ END --------------

} // namespace gui2