c13_5f.h

C++Builder编程实例详解,用具体的例子阐明C++的一些基本操作,所有程序均在BC++上编译过.可靠,建议下载

//---------------------------------------------------------------------------
#ifndef C13_5fH
#define C13_5fH
//---------------------------------------------------------------------------
#include <stdlib.h>
#include <math.h>
#include <vcl\Classes.hpp>
#include <vcl\Controls.hpp>
#include <vcl\StdCtrls.hpp>
#include <vcl\Forms.hpp>
#include <vcl\Menus.hpp>
#include <vcl\ExtCtrls.hpp>
#include <vcl\Buttons.hpp>

//---------------------------------------------------------------------------
// 自定义数据
#define IC_ARROW      1
#define IC_LINE       2
#define IC_RECTANGLE  3
#define DISTENCE      5
#define BACKCOLOR     clWhite // 背景色
#define FORECOLOR     clBlack // 前景色
//---------------------------------------------------------------------------
// 自定义类
class Unit //: public TObject
{ // 公用类
public:
	long type;

protected:
	long X1, Y1;
        long X2, Y2;

public:
        virtual bool IsMe(long x, long y) // 判断输入点是否接近本对象
        {return(false);} // 虚拟（virtual）函数，用于重载。
                         // 虚拟函数的重载是C++语言的重要特性之一 ，
                         // 重载为继承类的功能扩展与代码重用提供了良好的机制。
        virtual void Draw(TCanvas *Canvas) // 画对象自身
        {}
        virtual void UpDate(long dx, long dy)
        { X1 += dx; Y1 += dy; X2 += dx; Y2 += dy;}
        virtual void UpDate1(long x, long y)
        {X1 = x; Y1 = y;}
        virtual void UpDate2(long x, long y)
        {X2 = x; Y2 = y;}
};

class UnitLine : public Unit
{ // 直线类
public:
	virtual bool IsMe(long x, long y);
        virtual void Draw(TCanvas *Canvas);
        __fastcall UnitLine(){};
};


class UnitRect : public Unit
{ // 矩形类
public:
	virtual bool IsMe(long x, long y);
        virtual void Draw(TCanvas *Canvas);
};
//---------------------------------------------------------------------------
class sUnit
{ // 链表项类
public:
	Unit* p;
        sUnit *prev;
        sUnit *next;
        __fastcall sUnit() //构造函数，在创建该对象的实例时由系统调用
        {prev = NULL; next = NULL; p = NULL;}
        __fastcall ~sUnit() // 析构函数
        {if(p) delete p;} // 删除 Unit 对象 p 。
};

class UnitLink //: TObject
{ // 链表类
private:
	sUnit* pHead;

public:
       void AddItem(Unit *p);
       Unit* GetAt(int i);
       int GetNum();
       void DelItem(Unit* p);
       Unit* IsThis(long x, long y);
       void Draw(TCanvas* Canvas);
       __fastcall UnitLink()
       {pHead = NULL;}
       __fastcall ~UnitLink();
};
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:	// IDE-managed Components
	TMainMenu *MainMenu1;
	TMenuItem *N1;
	TMenuItem *Exit;
	TPanel *Panel1;
	TSpeedButton *Arrow;
	TSpeedButton *Line;
	TSpeedButton *Rect;
	TSpeedButton *Delete;
	TPaintBox *PaintBox1;
	void __fastcall ExitClick(TObject *Sender);
	void __fastcall FormCreate(TObject *Sender);
	void __fastcall ArrowClick(TObject *Sender);
	void __fastcall LineClick(TObject *Sender);
	void __fastcall RectClick(TObject *Sender);
	void __fastcall PaintBox1MouseDown(TObject *Sender, TMouseButton Button,
	TShiftState Shift, int X, int Y);
	void __fastcall PaintBox1MouseUp(TObject *Sender, TMouseButton Button,
	TShiftState Shift, int X, int Y);
	void __fastcall PaintBox1MouseMove(TObject *Sender, TShiftState Shift, int X,
	int Y);
	void __fastcall FormDestroy(TObject *Sender);
	void __fastcall DeleteClick(TObject *Sender);
	
	
	void __fastcall PaintBox1Paint(TObject *Sender);
private:	// User declarations
public:		// User declarations
	int UserAction;
        bool Drawing;
        Unit* CurrentUnit;
        UnitLink* Linker;
        long CurrentX, CurrentY;
        void __fastcall ClearDraw();
	__fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern TForm1 *Form1;
//---------------------------------------------------------------------------
#endif