#include "DXDW.h"


DX *dx = NULL;



LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
	if (dx) dx->keydown = false;
    switch( msg )
    {
        case WM_DESTROY:
            PostQuitMessage( 0 );
            return 0;

		case WM_KEYUP:
			dx->keydown = false;
			return 0;

		case WM_KEYDOWN:
			if (dx->keydown == false)
			{
				dx->keydown = true;
				switch (wParam) 
				{
				case VK_ESCAPE:    
					PostQuitMessage( 0 );
					break;
				case VK_UP:
					if (dx) dx->manindex = 1; 
					break;
				case VK_DOWN:
					if (dx) dx->manindex = 3; 
					break;
				case VK_LEFT:
					if (dx) dx->manindex = 4; 
					break;
				case VK_RIGHT:
					if (dx) dx->manindex = 2; 
					break;
				}
			}
			return 0;
    }

    return DefWindowProc( hWnd, msg, wParam, lParam );
}




INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
    WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L, 
                      GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
                      "DirectDraw", NULL };
    RegisterClassEx( &wc );

    HWND hWnd = CreateWindow( "DirectDraw", "專題教學3", 
                              WS_OVERLAPPEDWINDOW, 0, 0, 640, 480,
                              GetDesktopWindow(), NULL, wc.hInstance, NULL );

	dx = new DX;

	if (dx->InitDX(hWnd) != DD_OK)
	{
		if (dx) delete dx;
		return 0;
	}

	if (dx->InitBmp() != DD_OK)
	{
		if (dx) delete dx;
		return 0;
	}

    ShowWindow( hWnd, SW_SHOWDEFAULT );
    UpdateWindow( hWnd );

	MSG msg; 
    ZeroMemory( &msg, sizeof(msg) );
    while( msg.message!=WM_QUIT )
    {
        if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )
        {
            TranslateMessage( &msg );
            DispatchMessage( &msg );
        }
        else
            dx->Render();
		    ValidateRect( hWnd, NULL );
    }

    if (dx) delete dx;

    UnregisterClass( "DirectDraw", wc.hInstance );
    return 0;
}