MiniDexed/src/uibuttons.h

//
// uibuttons.h
//
// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
// Copyright (C) 2022  The MiniDexed Team
//
// Original author of this class:
//	R. Stange <rsta2@o2online.de>
//
// 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 _uibuttons_h
#define _uibuttons_h

#include <circle/gpiopin.h>
#include <circle/types.h>
#include "config.h"

class CUIButton
{
public:
	CUIButton (unsigned nPin);
	~CUIButton (void);
	
	boolean Initialize (void);
	
	boolean Read (void);

private:
	unsigned m_nPin;
	CGPIOPin *m_pPin;
	unsigned m_nLastValue;
};

class CUIButtons
{
public:
	enum TBtnEvent
	{
		BtnEventPrev,
		BtnEventNext,
		BtnEventBack,
		BtnEventSelect,
		BtnEventHome,
		BtnEventUnknown
	};
	
	typedef void TBtnEventHandler (TBtnEvent Event, void *pParam);

public:
	CUIButtons (unsigned nPrevPin = 0, unsigned nNextPin = 0, unsigned nBackPin = 0, unsigned nSelectPin = 0, unsigned nHomePin = 0);
	~CUIButtons (void);
	
	boolean Initialize (void);
	
	void RegisterEventHandler (TBtnEventHandler *pHandler, void *pParam = 0);
	
	void Update (void);
	
private:
	CUIButton m_PrevButton;
	CUIButton m_NextButton;
	CUIButton m_BackButton;
	CUIButton m_SelectButton;
	CUIButton m_HomeButton;

	TBtnEventHandler *m_pEventHandler;
	void *m_pEventParam;
};

#endif