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/* Copyright (C) 2012 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. 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.
*
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_TOUCHINPUT
#define INCLUDED_TOUCHINPUT
#include "lib/input.h"
#include "maths/Vector2D.h"
#include "maths/Vector3D.h"
/**
* Maps touch events (e.g. on Android touchscreen devices) onto mouse events
* and camera movement.
*/
class CTouchInput
{
public:
CTouchInput();
~CTouchInput();
/**
* Returns whether the touch input mode is enabled for this device.
*/
bool IsEnabled();
InReaction HandleEvent(const SDL_Event_* ev);
/**
* Should be called once per frame to perform updates.
*/
void Frame();
private:
void OnFingerDown(int id, int x, int y);
void OnFingerUp(int id, int x, int y);
void OnFingerMotion(int id, int x, int y);
// Mouse emulation state:
enum
{
MOUSE_INACTIVE,
MOUSE_ACTIVATING,
MOUSE_ACTIVE_UP,
MOUSE_ACTIVE_DOWN
};
static const size_t MAX_MOUSE = 2;
int m_MouseEmulateState[MAX_MOUSE];
CVector2D m_MouseEmulateDownPos[MAX_MOUSE];
// Current finger state:
static const size_t MAX_FINGERS = 2;
bool m_Down[MAX_FINGERS];
CVector2D m_Pos[MAX_FINGERS];
CVector2D m_Prev[MAX_FINGERS];
enum
{
STATE_INACTIVE,
STATE_FIRST_TOUCH,
STATE_PANNING,
STATE_ZOOMING
};
int m_State;
double m_FirstTouchTime;
CVector2D m_FirstTouchPos;
CVector3D m_PanFocus;
float m_PanDist;
};
extern CTouchInput g_TouchInput;
extern InReaction touch_input_handler(const SDL_Event_* ev);
#endif // INCLUDED_TOUCHINPUT
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