www.pudn.com > CDX.rar > Ex3.cpp

// ------------------------------------------------------------------------------------------ 
// CDX example 3 - Windowed scrolling 
// You must link to cdx.lib, ddraw.lib and dxguid.lib 
// fixed and reworked for CDX 2.3 7/1999 by Ioannis Karagiorgos, Ioannis.Karagiorgos@gmx.de 
// ------------------------------------------------------------------------------------------ 
 
#ifndef WIN32_LEAN_AND_MEAN 
#define WIN32_LEAN_AND_MEAN 
#endif 
 
#include  
#include  
#include  
 
#define CDXINCLUDEALL           // include all CDX headers 
#include  
 
CDXScreen   * Screen    = 0;    // The screen object, every program must have one 
CDXTile     * Tiles     = 0;    // The background tiles 
CDXMap      * Map       = 0;    // The scrolling map object 
 
BOOL        bActive     = TRUE; // Is the program running? 
 
#define NAME		"CDXExample3" 
#define TITLE		"CDX Example 3" 
 
 
// ------------------------------------------------------------------------------------------ 
// FiniApp - Destroy the CDX objects 
// ------------------------------------------------------------------------------------------ 
void FiniApp(void) 
{ 
    SAFEDELETE( Screen );       // delete the screen object 
} 
 
 
 
// ------------------------------------------------------------------------------------------ 
// WinProc, this handles all windows messages 
// ------------------------------------------------------------------------------------------ 
long PASCAL WinProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) 
{ 
	switch(message) 
	{ 
		case WM_ACTIVATEAPP:    bActive = wParam;   // set if app is active or not 
			                    break; 
 
		case WM_KEYDOWN:		switch(wParam)      // if ESC key is hit, quit program 
			                    { 
				                    case VK_ESCAPE: 
					                PostMessage(hWnd, WM_CLOSE, 0, 0); 
				                    break; 
			                    } 
		                        break; 
 
		case WM_DESTROY:		FiniApp();			// destroy all objects 
								PostQuitMessage(0); // terminate program 
		                        break; 
	} 
 
	return DefWindowProc(hWnd, message, wParam, lParam); 
} 
 
 
 
// ------------------------------------------------------------------------------------------ 
// InitApp - Create the window and the CDX objects 
// ------------------------------------------------------------------------------------------ 
BOOL InitApp(HINSTANCE hInst, int nCmdShow) 
{ 
	HWND        hWnd; 
	WNDCLASS    WndClass; 
   	RECT        rc; 
	DWORD       dwStyle; 
 
 
	WndClass.style = CS_HREDRAW | CS_VREDRAW; 
	WndClass.lpfnWndProc = WinProc; 
	WndClass.cbClsExtra = 0; 
	WndClass.cbWndExtra = 0; 
	WndClass.hInstance = hInst; 
	WndClass.hIcon = LoadIcon(0, IDI_APPLICATION); 
	WndClass.hCursor = LoadCursor(0, IDC_ARROW); 
	WndClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); 
	WndClass.lpszMenuName = 0; 
	WndClass.lpszClassName = NAME; 
	RegisterClass(&WndClass); 
 
    // create the main window 
	hWnd = CreateWindowEx( 
		WS_EX_WINDOWEDGE, 
		NAME, 
		TITLE, 
		WS_VISIBLE|WS_SYSMENU, 
		0,0, 
		448, 
		320, 
		NULL, 
		NULL, 
		hInst, 
		NULL); 
 
    // when hWnd = -1 there was an error creating the main window 
    // CDXError needs a CDXScreen object, if there is none at this early 
    // program stage, pass it NULL 
	if(!hWnd)  
        CDXError( NULL , "could not create the main window" ); 
 
    // set the window style to a normal window 
	dwStyle = GetWindowStyle(hWnd); 
	dwStyle &= ~WS_POPUP; 
	dwStyle |= WS_OVERLAPPED | WS_CAPTION | WS_THICKFRAME | WS_MINIMIZEBOX; 
	SetWindowLong(hWnd, GWL_STYLE, dwStyle); 
 
    // set the client area size to 448 , 320 
	SetRect(&rc, 0, 0, 448, 320); 
	AdjustWindowRectEx(&rc, 
		GetWindowStyle(hWnd), 
		GetMenu(hWnd) != NULL, 
		GetWindowExStyle(hWnd)); 
 
    // set windows coordinates to 0,0 
	SetWindowPos(hWnd, NULL, 0, 0, rc.right-rc.left, rc.bottom-rc.top, 
		SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE); 
 
	SetWindowPos(hWnd, HWND_NOTOPMOST, 0, 0, 0, 0, 
		SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE); 
 
    // show the main window 
	ShowWindow(hWnd, nCmdShow); 
	UpdateWindow(hWnd); 
 
	// Create the CDXSreen object 
	Screen = new CDXScreen(); 
	if( FAILED(Screen->CreateWindowed(hWnd, 448, 320))) 
        CDXError( NULL , "could not set video mode 448x320 windowed" ); 
 
	// Load the tiles 
    Tiles = new CDXTile(); 
    if( Tiles->Create( Screen , "TILES.BMP" , 64 , 64 , 0 )==FALSE) 
        CDXError( Screen , "could not load tiles from file TILES.BMP" ); 
 
	// Create and load the map 
	Map = new CDXMap(Tiles, Screen); 
	Map->Create(64, 64, 1); 
	Map->MoveTo(0,0); 
 
	Map->EnableScrollWrapping(TRUE); 
 
	return TRUE; 
} 
 
 
// ------------------------------------------------------------------------------------------ 
// WinMain 
// ------------------------------------------------------------------------------------------ 
int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmdLine, int nCmdShow) 
{ 
	MSG 	msg; 
 
	if(!InitApp(hInst, nCmdShow)) 
        CDXError( NULL , "could not initialize CDX application" ); 
 
	while(1) 
	{ 
		if(PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) 
		{ 
			if(!GetMessage(&msg, NULL, 0, 0 )) return msg.wParam; 
			TranslateMessage(&msg);  
			DispatchMessage(&msg); 
		} 
		else if(bActive)    // if application has the focus, process 
		{ 
            // Check key states for arrow up,down,left and right 
            // and scroll the map in the corresponding direction 
			if(GetAsyncKeyState(VK_UP)) Map->ScrollUp(2); 
			if(GetAsyncKeyState(VK_DOWN)) Map->ScrollDown(2); 
			if(GetAsyncKeyState(VK_LEFT))	Map->ScrollLeft(2); 
			if(GetAsyncKeyState(VK_RIGHT)) Map->ScrollRight(2); 
 
			Map->Draw(Screen->GetBack());  // Draw the map to the back buffer 
			Screen->Flip();  // Then display it 
		} 
		else WaitMessage(); 
	} 
}