button.h

计算器程序

//****************************************************************
//This software may not be distributed further without permission from
// Sun Xueshi's Group
//      
//This software is distributed WITHOUT ANY WARRANTY. No claims are made
// as to its functionality or purpose.
// 
//Authors: 孙学诗
// Date: 12/4/03
// 
//****************************************************************

#ifndef BUTTON_H
#define BUTTON_H

#include <string>
#include "bitmap.h"

using namespace std;

enum Status { Up, Down };           //button has two status---up and down

class Button {
	friend class CalcObj;                //class calcobj may use some data members of class button
	public:
		Button();	
		//Initialize parameters of button, 
		//UpFile and DownFile are two Bitmap file name of UpButton and Downbutton
		void Initialize(SimpleWindow &CalcWindow, const string &UpFile, const string &DownFile, 
			const Position Posn);
		void SetStatus(const Status &s);       //Mutator: Reset button status
		Status GetStatus() const;                  //Inspector: Get current  button status
		float GetHeight() const;                     //Inspector: Get height of button bitmap
                float GetWidth() const;                      //Inspector: Get width of button bitmap
		void Draw();                                       //Mutator: Draw button bitmap
		void Flip();                                         //Mutator: Change button current status to the other
		bool IsInside(const Position &MousePosition) const;       //Inspector: If mouseclick if on the bitmap, return ture
	private:
		char ButtonValue;                        //Each button has a  corresponding character value
		BitMap UpButton;                         //Bitmap of Up-status button
		BitMap DownButton;                    //Bitmap of down-status button
		Status StatusShowing;                //Show current button status
};
#endif