/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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; 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.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef BACKEND_EVENTS_SDL_LEGACY_H
#define BACKEND_EVENTS_SDL_LEGACY_H

#include "backends/events/sdl/sdl-events.h"

// multiplier used to increase resolution for keyboard/joystick mouse
#define MULTIPLIER 16

class LegacySdlEventSource : public SdlEventSource {
public:
	LegacySdlEventSource();

	bool pollEvent(Common::Event &event) override;

	void checkScreenChange();

protected:
	/** @name Keyboard mouse emulation
	 * Disabled by fingolfin 2004-12-18.
	 * I am keeping the rest of the code in for now, since the joystick
	 * code (or rather, "hack") uses it, too.
	 */
	//@{

	struct KbdMouse {
		int32 x, y;
		int16 x_vel, y_vel, x_max, y_max, x_down_count, y_down_count, joy_x, joy_y;
		uint32 last_time, delay_time, x_down_time, y_down_time;
		bool modifier;
	};
	KbdMouse _km;

	virtual void updateKbdMouse();
	virtual bool handleKbdMouse(Common::Event &event);

	//@}

	bool handleMouseMotion(SDL_Event &ev, Common::Event &event) override;
	bool handleMouseButtonDown(SDL_Event &ev, Common::Event &event) override;
	bool handleMouseButtonUp(SDL_Event &ev, Common::Event &event) override;
	bool handleJoyAxisMotion(SDL_Event &ev, Common::Event &event) override;

#if SDL_VERSION_ATLEAST(2, 0, 0)
	bool handleControllerButton(const SDL_Event &ev, Common::Event &event, bool buttonUp) override;
	bool handleControllerAxisMotion(const SDL_Event &ev, Common::Event &event) override;
#endif

	/**
	 * Update the virtual mouse according to a joystick or game controller axis position change
	 */
	virtual bool handleAxisToMouseMotion(int16 xAxis, int16 yAxis);

	/**
	 * Compute the virtual mouse movement speed factor according to the 'kbdmouse_speed' setting.
	 * The speed factor is scaled with the display size.
	 */
	int16 computeJoystickMouseSpeedFactor() const;

	/**
	 * Resets keyboard emulation after a video screen change
	 */
	void resetKeyboardEmulation(int16 x_max, int16 y_max);

};

#endif
