keyboard.h

#pragma once

//
// Powered by tapy.me/weikton
// 

#define LAYOUT_ENG			0
#define LAYOUT_RUS			1	
#define LAYOUT_NUM			2

#define LOWER_CASE			0
#define UPPER_CASE			1

#define KEY_DEFAULT			0
#define KEY_SHIFT			1
#define KEY_BACKSPACE		2
#define KEY_SWITCH			3
#define KEY_SPACE 			4
#define KEY_SEND			5

#define MAX_INPUT_LEN		0xBF

struct kbKey
{
	// Ïîçèöèÿ êíîïêè
	ImVec2 pos;
	// Ïîçèöèÿ ñèìâîëà
	ImVec2 symPos;
	// Øèðèíà êíîïêè
	float width;
	// Êîä ñèìâîëà (cp1251 lower/upper case)
	char code[2];
	// utf8-code (äëÿ ðåíäåðà)
	char name[2][4];
	// Òèï êíîïêè
	int type;
	// id êíîïêè
	int id;
};

typedef void keyboard_callback(const char* result);

class CKeyBoard
{
	friend class CGUI;
public:
	CKeyBoard();
	~CKeyBoard();

	void Open(keyboard_callback* handler);
	void Close();

	bool IsOpen() { return m_bEnable; }

protected:
	void Render();
	bool OnTouchEvent(int type, bool multi, int x, int y);

private:
	void InitENG();
	void InitRU();
	void InitNUM();
	kbKey* GetKeyFromPos(int x, int y);

	void HandleInput(kbKey &key);
	void AddCharToInput(char sym);
	void DeleteCharFromInput();
	void Send();

	void setInput(std::string msg);
	void clearInput();
	void WriteHistory(std::string msg);
	
	bool m_bEnable;
	bool m_bInited;
	ImVec2 m_Size;
	ImVec2 m_Pos;
	float m_fKeySizeY;
	float m_fFontSize;

	int m_iLayout;
	int m_iCase;
	int m_iPushedKey;
	int m_iCurrentPosItem;

	bool m_bKeyHistoryPressed[2]; 
	std::vector<std::string> m_szKeyBoardHistory;

	std::vector<kbKey> m_Rows[3][4]; // eng, rus, num

	std::string m_sInput;
	char m_utf8Input[MAX_INPUT_LEN*3 + 0xF];
	int m_iInputOffset;

	keyboard_callback *m_pHandler;
};