#define IDR_MENU1                       101

#define ID_CHONMAUVE_DO                 40001

#define ID_CHONMAUVE_XANH               40002

#define ID_CHONMAUVE_VANG               40003

#define ID_CHONMAUVE_TIM                40004

#define ID_CHONMAUTO_DO                 40005

#define ID_CHONMAUTO_XANH               40006

#define ID_CHONMAUTO_VANG               40007

#define ID_CHONMAUTO_TIM                40008

#define ID_CHONHINHVE_CHUNHAT           40009

#define ID_CHONHINHVE_ELIP              40010

#define ID_CHONHINHVE_DUONGTHANG        40011

#define ID_CHONHINHVE_XOATATCA          40012

#define ID_THOAT                        40013

IDR_MENU1 MENU DISCARDABLE

BEGIN

    POPUP "chon mau ve"

    BEGIN

        MENUITEM "DO",                          ID_CHONMAUVE_DO

        MENUITEM "XANH",                        ID_CHONMAUVE_XANH

        MENUITEM "VANG",                        ID_CHONMAUVE_VANG

        MENUITEM "TIM",                         ID_CHONMAUVE_TIM

    END

    POPUP "CHON MAU TO"

    BEGIN

        MENUITEM "DO",                          ID_CHONMAUTO_DO

        MENUITEM "XANH",                        ID_CHONMAUTO_XANH

        MENUITEM "VANG",                        ID_CHONMAUTO_VANG

        MENUITEM "TIM",                         ID_CHONMAUTO_TIM

    END

    POPUP "CHON HINH VE"

    BEGIN

        MENUITEM "CHU NHAT",                    ID_CHONHINHVE_CHUNHAT

        MENUITEM "ELIP",                        ID_CHONHINHVE_ELIP

        MENUITEM "DUONG THANG",                 ID_CHONHINHVE_DUONGTHANG

        MENUITEM "XOA TAT CA",                  ID_CHONHINHVE_XOATATCA

    END

    MENUITEM "",                            65535

    MENUITEM "THOAT",                       ID_THOAT

END

#include<afxwin.h>

#include"resource.h"

class CMyApp:public CWinApp

{

public:

    BOOL InitInstance();

};

class CMyWin:public CFrameWnd

{

private:

    CDC m_memDC;

    CBitmap m_bmp;

    CBrush m_bkbrush;

    //-------------------

    int maxX,maxY,hinhve;

    CPoint oldPoint;

    CPen p;

    CBrush b;

public:

    CMyWin();

    afx_msg void OnPaint();

    afx_msg void OnLButtonDown(UINT nFlags,CPoint point);

    afx_msg void OnLButtonUp(UINT nFlags,CPoint point);

    afx_msg void OnMouseMove(UINT nFlags,CPoint point);

    void OnChooseCommand(UINT id);

    DECLARE_MESSAGE_MAP()

};

CMyApp theApp;

BEGIN_MESSAGE_MAP(CMyWin,CFrameWnd)

ON_WM_PAINT()

ON_WM_LBUTTONDOWN()

ON_WM_LBUTTONUP()

ON_WM_MOUSEMOVE()

ON_COMMAND_RANGE(ID_CHONMAUVE_DO,ID_THOAT,OnChooseCommand)

END_MESSAGE_MAP()

BOOL CMyApp::InitInstance()

{

    m_pMainWnd=new CMyWin;

    m_pMainWnd->ShowWindow(m_nCmdShow);

    m_pMainWnd->UpdateWindow();

    return TRUE;

}

CMyWin::CMyWin()

{

    CMenu mn;

    Create(NULL,"Vi du 04-chuong 04");

    mn.LoadMenu(IDR_MENU1);

    SetMenu(&mn);

    p.CreatePen(PS_SOLID,1,RGB(0,0,0));

    b.CreateSolidBrush(RGB(0,0,0));

    //--------------------

    maxX=GetSystemMetrics(SM_CXSCREEN);

    maxY=GetSystemMetrics(SM_CYSCREEN);

    CClientDC DC(this);

    m_memDC.CreateCompatibleDC(&DC);

    m_bmp.CreateCompatibleBitmap(&DC,maxX,maxY);

    m_memDC.SelectObject(&m_bmp);

    //------------------------

    m_bkbrush.CreateStockObject(WHITE_BRUSH);

    m_memDC.SelectObject(&m_bkbrush);

    m_memDC.PatBlt(0,0,maxX,maxY,PATCOPY);

    //--------------------------------

    hinhve=3;

}

void CMyWin::OnPaint()

{

    CPaintDC DC(this);

    //copy tu cua so ao

    //len cua so that

    DC.BitBlt(0,0,maxX,maxY,&m_memDC,0,0,SRCCOPY);

}

void CMyWin::OnLButtonDown(UINT nFlags,CPoint point)

{

    oldPoint =point;

}

void CMyWin::OnLButtonUp(UINT nFlags,CPoint point)

{

    m_memDC.SelectObject(&b);

    m_memDC.SelectObject(&p);

    switch(hinhve)

    {

    case 1:

        m_memDC.Rectangle(oldPoint.x,oldPoint.y,point.x,point.y);

        break;

    case 2:

m_memDC.Ellipse(oldPoint.x,oldPoint.y,point.x,point.y);

        break;

    case 3:

        m_memDC.MoveTo(oldPoint.x,oldPoint.y);

        m_memDC.LineTo(point.x,point.y );

        break;

}

InvalidateRect(NULL);//tu yeu cau

//ve lai cua so

}

void CMyWin::OnChooseCommand(UINT id)

{

    switch(id)

    {

    case ID_THOAT:

        DestroyWindow();

        break;

    case ID_CHONMAUVE_DO:

        p.DeleteObject();

        p.CreatePen(PS_SOLID,1,RGB(255,0,0));

        break;

    case ID_CHONMAUVE_XANH:

        p.DeleteObject();

        p.CreatePen(PS_SOLID,1,RGB(0,0,255));

        break;

    case ID_CHONMAUVE_VANG:

        p.DeleteObject();

        p.CreatePen(PS_SOLID,1,RGB(255,255,0));

        break;

    case ID_CHONMAUVE_TIM:

        p.DeleteObject();

        p.CreatePen(PS_SOLID,1,RGB(255,0,255));

        break;

    case ID_CHONMAUTO_DO:

        b.DeleteObject();

        b.CreateSolidBrush(RGB(255,0,0));

        break;

    case ID_CHONMAUTO_XANH:

        b.DeleteObject();

        b.CreateSolidBrush(RGB(0,0,255));

        break;

    case ID_CHONMAUTO_VANG:

        b.DeleteObject();

        b.CreateSolidBrush(RGB(255,255,0));

        break;

    case ID_CHONMAUTO_TIM:

        b.DeleteObject();

        b.CreateSolidBrush(RGB(255,0,255));

        break;

    case ID_CHONHINHVE_CHUNHAT:

        hinhve=1;

        break;

    case ID_CHONHINHVE_ELIP:

        hinhve=2;

        break;

    case ID_CHONHINHVE_DUONGTHANG:

        hinhve=3;

        break;

    case ID_CHONHINHVE_XOATATCA:

        m_memDC.SelectObject(&m_bkbrush);

        m_memDC.PatBlt(0,0,maxX,maxY,PATCOPY);

        InvalidateRect(NULL);

        break;

    }

}

void CMyWin::OnMouseMove(UINT nFlags,CPoint point)

{

/*

    if(nFlags!=MK_LBUTTON) return;

    CDC *dc=GetDC();

    dc->SelectObject(&p);

    dc->SelectObject(&b);

    dc->MoveTo(oldPoint);

    switch(hinhve)

    {

    case 1:

        dc->Rectangle(oldPoint.x,oldPoint.y,point.x,point.y);

        break;

    case 2:

dc->Ellipse(oldPoint.x,oldPoint.y,point.x,point.y);

        break;

    case 3:

        dc->LineTo(point);

        break;

}*/

}