#include <gui/ApplicationWindow.h>
#include <gui/Application.h>
#include <gui/TextView.h>
#include <cstdlib>

using namespace SkyGI;

#define BUTTON_ZERO		0
#define BUTTON_ONE		1
#define BUTTON_TWO		2
#define BUTTON_THREE	3
#define BUTTON_FOUR		4
#define BUTTON_FIVE		5
#define BUTTON_SIX		6
#define BUTTON_SEVEN	7
#define BUTTON_EIGHT	8
#define BUTTON_NINE		9
#define BUTTON_PLUS		10
#define BUTTON_MINUS	11
#define BUTTON_TIMES	12
#define BUTTON_DIVIDE	13
#define BUTTON_EQUALS	14
#define BUTTON_POINT	15
#define BUTTON_SIGN		16
#define BUTTON_CLEAR	17

class Calculator : public Application {
	public:
		Calculator(int argc, char *argv[]);
};

class CalculatorWindow : public ApplicationWindow {
	public:
				CalculatorWindow(	const Rect &rFrame,
									const String& szTitle,
									unsigned int nWindowLayoutFlags,
									unsigned int uiFlags = 0);
		void    OnCommand(			const MessageCommand *pMessage);
	private:
		void	Clear();
		void	doOperation(		int next_operation);
		
		TextView	*	pText;
		String		*	line;
		double 			total;
		double			operand;
		int 			operation;
		bool 			new_operand;
};