键盘获取.cpp

DirectInput的基本实现 只是基本应用

// 键盘获取.cpp : 定义应用程序的入口点。
//

#include "stdafx.h"
#include "键盘获取.h"
#define MAX_LOADSTRING 100

#include <dinput.h>
#include <dinputd.h>
#pragma comment(lib,"dinput8.lib")
#pragma comment(lib,"dxguid.lib")

#define MK_MIN		0x100
#define MK_LEFT		0x100	//>255
#define MK_RIGHT	0x101
#define MK_MID		0x102

#define SAFE_RELEASE(p) if(p) {p->Release();p=NULL;}

// 全局变量:
HINSTANCE hInst;								// 当前实例
TCHAR szTitle[MAX_LOADSTRING];					// 标题栏文本
TCHAR szWindowClass[MAX_LOADSTRING];			// 主窗口类名

HDC memDC;//定义一个兼容DC
HBITMAP hBitmap;
BITMAP bmp;

//在DirectX9.0c的SDK中的DirectInput实际是8.0版本

LPDIRECTINPUT8			m_pDInput;//DirectInput8的接口指针
LPDIRECTINPUTDEVICE8	m_pDInputKB;//设备指针

char			m_strKeyState[256];
char			m_strKeyStateOld[256];         
int x,y;

// 此代码模块中包含的函数的前向声明:
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK	About(HWND, UINT, WPARAM, LPARAM);

LRESULT GetIsKeyDown(DWORD keycode)
{
	if(keycode<MK_MIN)
		return (0x80 & m_strKeyState[keycode]) | m_strKeyStateOld[keycode] >>4 ;
};
LRESULT Update(void)
{
	//更新之前记录一下上一次的状态
	memcpy(m_strKeyStateOld,m_strKeyState,sizeof(m_strKeyState));

	if(DI_OK!=m_pDInputKB->GetDeviceState(sizeof(m_strKeyState),m_strKeyState))
	{	
		memset(&m_strKeyState,0,sizeof(m_strKeyState));	//清除上一次的状态
		m_pDInputKB->Acquire();
	}
  	return DI_OK;
}

int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: 在此放置代码。
	MSG msg;
	HACCEL hAccelTable;

	// 初始化全局字符串
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_MY, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// 执行应用程序初始化:
	if (!InitInstance (hInstance, nCmdShow)) 
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_MY);

	// 主消息循环:
	ZeroMemory(&msg,sizeof(msg));
	while (msg.message!=WM_QUIT) 
	{
		if (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) 
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
		else
		{
			Update();
		}
	}

	return (int) msg.wParam;
}

//
//  函数: MyRegisterClass()
//
//  目的: 注册窗口类。
//
//  注释: 
//
//    仅当希望在已添加到 Windows 95 的
//    “RegisterClassEx”函数之前此代码与 Win32 系统兼容时，
//    才需要此函数及其用法。调用此函数
//    十分重要，这样应用程序就可以获得关联的
//   “格式正确的”小图标。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX); 

	wcex.style			= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= (WNDPROC)WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon			= LoadIcon(hInstance, (LPCTSTR)IDI_MY);
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= (LPCTSTR)IDC_MY;
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);

	return RegisterClassEx(&wcex);
}

//
//   函数: InitInstance(HANDLE, int)
//
//   目的: 保存实例句柄并创建主窗口
//
//   注释: 
//
//        在此函数中，我们在全局变量中保存实例句柄并
//        创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   hInst = hInstance; // 将实例句柄存储在全局变量中

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  函数: WndProc(HWND, unsigned, WORD, LONG)
//
//  目的: 处理主窗口的消息。
//
//  WM_COMMAND	- 处理应用程序菜单
//  WM_PAINT	- 绘制主窗口
//  WM_DESTROY	- 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;

	switch (message) 
	{
	case WM_COMMAND:
		wmId    = LOWORD(wParam); 
		wmEvent = HIWORD(wParam); 
		// 分析菜单选择:
		switch (wmId)
		{
		case IDM_ABOUT:
			DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
			break;
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
		break;
	case WM_CREATE:
		hBitmap = NULL;
		//步骤（1）：创建DirectInput8对象
		if(DI_OK!=DirectInput8Create( hInst,DIRECTINPUT_VERSION,
				IID_IDirectInput8,(LPVOID*)&m_pDInput,NULL))
			MessageBox(hWnd,"创建DirectInput 对象失败!","ERROR",MB_ICONERROR|MB_OK);

		//步骤（2）：创建键盘设备
		if(DI_OK!=m_pDInput->CreateDevice(GUID_SysKeyboard,&m_pDInputKB,NULL))
			MessageBox(hWnd,"创建键盘设备失败!","ERROR",MB_ICONERROR|MB_OK);

		//步骤（3）：设置数据格式		
		if(DI_OK!=	m_pDInputKB->SetDataFormat(&c_dfDIKeyboard)) 
			MessageBox(hWnd,"设置键盘数据格式失败!","ERROR",MB_ICONERROR|MB_OK); 

		//步骤（4）：设置设备的协调层级
		m_pDInputKB->SetCooperativeLevel(hWnd,DISCL_NONEXCLUSIVE|DISCL_FOREGROUND); 
		
		//步骤（5）：获取设备
		m_pDInputKB->Acquire();		
	
		//步骤（6）：清除状态，并且获取输入的数据（在Updata这个函数中）
		memset(&m_strKeyState,0,sizeof(m_strKeyState));		
		memset(&m_strKeyStateOld,0,sizeof(m_strKeyState));	
	
		SetTimer(hWnd,1,20,NULL);
		break;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		if(!hBitmap)
		{
			memDC = CreateCompatibleDC(hdc);//创建内存DC
			hBitmap = (HBITMAP)LoadImage(hInst,"ball.bmp" ,IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE|LR_CREATEDIBSECTION);//高色位图也没关系
			SelectObject(memDC,hBitmap);//选入新位图入内存DC
			GetObject(hBitmap, sizeof(BITMAP), &bmp);
		}
		BitBlt(hdc,x,y,bmp.bmWidth,bmp.bmHeight,memDC,0,0,SRCCOPY);//将内存DC中的数据复制到显示DC
		ReleaseDC(hWnd,memDC);

		EndPaint(hWnd, &ps);
		break;
	case WM_TIMER:
		RECT rect;
		GetClientRect(hWnd, &rect);

		switch(wParam)
		{
		case 1:
			if(0x80&m_strKeyState[DIK_RIGHT])
				if(x+80 > rect.right)     
					x = rect.right - 80;
				else
					x+=10;
			if(0x80&m_strKeyState[DIK_LEFT])  
				if(x-10 < 0)          
					x = 0;
				else
					x-=10;
			if(0x80&m_strKeyState[DIK_UP])
				if(y-10 < 0)         
					y = 0;
				else
					y-=10;
			if(0x80&m_strKeyState[DIK_DOWN])
				if(y+80 > rect.bottom)    
					y = rect.bottom-80;
				else
					y+=10;
			if(0x80&m_strKeyState[DIK_ESCAPE])
			{
				KillTimer(hWnd,1);            
				PostMessage(hWnd,WM_CLOSE,NULL,NULL);
			}


			if(0x80&m_strKeyState[DIK_A])
				MessageBox(NULL,"DirectInput","",MB_OK);


		}
		InvalidateRect(hWnd,&rect,FALSE);
		break;
	case WM_KEYDOWN:
		if(wParam=='A')
			MessageBox(NULL,"Message","",MB_OK);
		break;
	case WM_DESTROY:
		m_pDInputKB->Unacquire();
		SAFE_RELEASE(m_pDInputKB);
		SAFE_RELEASE(m_pDInput);
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}

// “关于”框的消息处理程序。
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
	case WM_INITDIALOG:
		return TRUE;

	case WM_COMMAND:
		if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) 
		{
			EndDialog(hDlg, LOWORD(wParam));
			return TRUE;
		}
		break;
	}
	return FALSE;
}