canvasframe.cpp

《Visual C++游戏设计入门》的配套代码

// canvasFrame.cpp : implementation file
//

#include "stdafx.h"
#include "canvasr.h"
#include "canvasFrame.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define ID_LIST 1000

/////////////////////////////////////////////////////////////////////////////
// canvasFrame

IMPLEMENT_DYNCREATE(canvasFrame, CFrameWnd)

canvasFrame::canvasFrame()
{
	RECT rect;
	Create(NULL,"绘图窗口");
	CClientDC dc(this);
	int width = dc.GetDeviceCaps(HORZRES);
	int height = dc.GetDeviceCaps(VERTRES);
	GetWindowRect( &rect );
	width = ( width - ( rect.right - rect.left ))/2 ;
	height = (height - (rect.bottom - rect.top ))/2 ;
	MoveWindow( width , height , (rect.right - rect.left ) , (rect.bottom - rect.top ) ,true);
	
	mdc = new CDC;        //建立一暂存DC对象
	bitmap = new CBitmap; //建立CBitmap位图对象
	bitmap->m_hObject = (HBITMAP)::LoadImage(NULL,"ball.bmp",IMAGE_BITMAP,198,113,LR_LOADFROMFILE); //加载原始位图文件
	mdc->CreateCompatibleDC(&dc); //将mdc转换成与dc相容的DC
	mdc->SelectObject(bitmap);    //选择位图对象到mdc中
}

canvasFrame::~canvasFrame()
{
	if(mdc) delete mdc;			//释放资源
	if(bitmap) delete bitmap;	//释放资源
}

void canvasFrame::OnSelChange()
{
	CClientDC dc(this);			//取得操作窗口DC
	Draw(&dc);					//执行重绘函数
}

BEGIN_MESSAGE_MAP(canvasFrame, CFrameWnd)
	//{{AFX_MSG_MAP(canvasFrame)
	ON_WM_CREATE()
	ON_WM_PAINT()
	ON_LBN_SELCHANGE(ID_LIST,OnSelChange)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// canvasFrame message handlers


int canvasFrame::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	listbox = new CListBox;
	listbox->CreateEx(WS_EX_CLIENTEDGE,"ListBox",NULL,LBS_STANDARD|WS_VISIBLE|WS_CHILD,CRect(10,50,180,300),this,ID_LIST); //