GameEngine_Input

#include "stdafx.h"
#include <stdio.h>
#include <d3d9.h>
#include <d3dx9.h>
#include <dinput.h>
#define SafeRelease(pObject) if(pObject!=NULL){pObject->Release();pObject=NULL;}
#define ITEMS_NUM 10
static LPDIRECTINPUT8 g_pIDirectInput=NULL;
extern hWnd;
class CGameEngine_Input{
private:
 LPDIRECTINPUTDEVICE8 m_pKeyboardDevice;    
 LPDIRECTINPUTDEVICE8 m_pMouseDevice;      
 char m_KeyBuffer[256];                    
 DIDEVICEOBJECTDATA m_MouseData[ITEMS_NUM]; 
 int MouseX,MouseY;       //鼠标的XY坐标
public:
 long m_lMouseMoveX,m_lMouseMoveY;          
 CGameEngine_Input();
 ~CGameEngine_Input();
 bool CreateInput(HINSTANCE,HWND,int iMin=-100,int iMax=100,int iDeadZone=20); 
 bool ReadKeyboard();
 bool ReadMouse();
 bool IsKeyPressed(int key);  //判断用户按键函数
 inline long GetMouseMoveX(){return m_lMouseMoveX;} 
 inline long GetMouseMoveY(){return m_lMouseMoveY;}
 int GetMouseX(HWND hWnd); 
 int GetMouseY(HWND hWnd);
 bool IsLButtonPressed();            //判断鼠标左键按下
 bool IsLButtonUp();     //判断鼠标左键放开
 bool IsRButtonPressed();            //判断鼠标右键按下
 bool IsMButtonPressed();            //判断鼠标中间滑轮按下
 void InputRelease();
private:
 bool CreateDirectInput(HINSTANCE);
 bool CreateKeyboard(HWND);
 bool CreateMouse(HWND);
 
};

 

///

///

#include "stdafx.h"
#include "GameEngine_Input.h"

CGameEngine_Input::CGameEngine_Input()
{
 m_pKeyboardDevice=NULL;
 m_lMouseMoveX=0;
 m_lMouseMoveY=0;
}

bool CGameEngine_Input::CreateInput(HINSTANCE hInst,HWND hWnd,int iMin,int iMax,int iDeadZone)
{
 CreateDirectInput(hInst);
 CreateKeyboard(hWnd);
 CreateMouse(hWnd);
 return true;
}

bool CGameEngine_Input::CreateDirectInput(HINSTANCE hInst)
{
 //创建IDirectInput接口对象
 if(FAILED(DirectInput8Create(hInst,DIRECTINPUT_VERSION,IID_IDirectInput8,(void**)&g_pIDirectInput,NULL))){
  MessageBox(NULL,"建立IDIRECTINPUT8接口对象失败.","警告",MB_OK|MB_ICONINFORMATION);
  return false;
 }
 return true;
}
bool CGameEngine_Input::CreateKeyboard(HWND hWnd){
 //创建键盘输入设备
 if(FAILED(g_pIDirectInput->CreateDevice(GUID_SysKeyboard,&m_pKeyboardDevice,NULL))){
  MessageBox(NULL,"建立键盘输入设备对象失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
 }
 //设置键盘输入设备的协调级别
 if(FAILED(m_pKeyboardDevice->SetCooperativeLevel(hWnd,DISCL_BACKGROUND|DISCL_NONEXCLUSIVE))){
  MessageBox(NULL,"设置键盘协调级别失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
 }

 //设置键盘输入设备的数据格式
 if(FAILED(m_pKeyboardDevice->SetDataFormat(&c_dfDIKeyboard))){
  MessageBox(NULL,"设置键盘的数据读取数据格式失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
 }

 //获取键盘输入设备的访问权
 
 if(FAILED(m_pKeyboardDevice->Acquire())){
  MessageBox(NULL,"取得键盘设备的访问权失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
 }
 //初始化键盘缓冲区
 ZeroMemory(m_KeyBuffer,sizeof(char)*256);
 return true;
}

//判断用户按键函数
bool CGameEngine_Input::ReadKeyboard(){  //key=DIK_RIGHT,DIK_LEFT,DIK_A,.....
 if(DIERR_INPUTLOST==m_pKeyboardDevice->GetDeviceState(sizeof(m_KeyBuffer),(LPVOID)m_KeyBuffer)){
  m_pKeyboardDevice->Acquire();  //重新获取键盘的使用权
  if(FAILED(m_pKeyboardDevice->GetDeviceState(sizeof(m_KeyBuffer),(LPVOID)m_KeyBuffer))){
   return false;
  }
 }
 return true;
}

bool CGameEngine_Input::CreateMouse(HWND hWnd){
 //创建鼠标输入设备
 if(FAILED(g_pIDirectInput->CreateDevice(GUID_SysMouse,&m_pMouseDevice,NULL))){
  MessageBox(NULL,"建立鼠标输入设备对象失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
 }
 //设置鼠标设备的数据格式
 if(FAILED(m_pMouseDevice->SetDataFormat(&c_dfDIMouse))){
  MessageBox(NULL,"设置鼠标的数据读取格式失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
 }
 //设置鼠标设备的协调级别
 if(FAILED(m_pMouseDevice->SetCooperativeLevel(hWnd,DISCL_FOREGROUND|DISCL_NONEXCLUSIVE))){
  MessageBox(NULL,"设置鼠标协调级别失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
 }
 //设置鼠标设备的属性(使用缓冲区读数据)
 DIPROPDWORD dipROPWORD;
 dipROPWORD.diph.dwSize=sizeof(DIPROPDWORD);
 dipROPWORD.diph.dwHeaderSize=sizeof(DIPROPHEADER);
 dipROPWORD.diph.dwObj=0;
 dipROPWORD.diph.dwHow=DIPH_DEVICE;
 dipROPWORD.dwData=ITEMS_NUM;  //#define ITEMS_NUM 10
 if(FAILED(m_pMouseDevice->SetProperty(DIPROP_BUFFERSIZE,&dipROPWORD.diph))){
  MessageBox(NULL,"设置鼠标设备属性失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
  
 }
 //获取鼠标设备的访问权
 if(FAILED(m_pMouseDevice->Acquire()))
 {
  MessageBox(NULL,"取得鼠标的访问权失败.","警告",MB_OK|MB_ICONINFORMATION);
  InputRelease();
  return false;
 }
 return true;
}
//判断键盘的按下状况
bool CGameEngine_Input::IsKeyPressed(int key)
{
 HRESULT hr;
 hr=m_pKeyboardDevice->GetDeviceState(sizeof(m_KeyBuffer),(LPVOID)m_KeyBuffer);
 if(hr==DIERR_INPUTLOST)
 {
  m_pKeyboardDevice->Acquire();
  hr=m_pKeyboardDevice->GetDeviceState(sizeof(m_KeyBuffer),(LPVOID)m_KeyBuffer);
  if(FAILED(hr))
  {
   MessageBox(NULL,"取得键盘按键状态失败","警告",MB_OK|MB_ICONINFORMATION);
      return false;
  }
 }
 if(m_KeyBuffer[key] & 0x80)
 {
  return true;
 }
 return false;
}

//捕捉鼠标按键和移动数据
bool CGameEngine_Input::ReadMouse(){
 DWORD dwReadNum=1;
 int i;
 //每次读取数据前，一定要使鼠标缓冲区清零
 ZeroMemory(m_MouseData,sizeof(DIDEVICEOBJECTDATA)*ITEMS_NUM);
 //循环读取鼠标数据
 for(i=0;i<ITEMS_NUM;i++){
  if(DIERR_INPUTLOST==m_pMouseDevice->GetDeviceData(sizeof(DIDEVICEOBJECTDATA),&m_MouseData[i],&dwReadNum,0)){
   m_pMouseDevice->Acquire();
   if(FAILED(m_pMouseDevice->GetDeviceData(sizeof(DIDEVICEOBJECTDATA),&m_MouseData[i],&dwReadNum,0))){
    return false;
   }
  }
  if(m_MouseData[i].dwOfs==DIMOFS_X){
   m_lMouseMoveX+=m_MouseData[i].dwData;
  }
  if(m_MouseData[i].dwOfs==DIMOFS_Y){
   m_lMouseMoveY+=m_MouseData[i].dwData;
  }
 }
 return true;
}

//判断鼠标左键按下
bool CGameEngine_Input::IsLButtonPressed(){
 for(int i=0;i<ITEMS_NUM;i++)
 {
  if((m_MouseData[i].dwOfs==DIMOFS_BUTTON0) && (m_MouseData[i].dwData & 0x80))
  {
   return true;
  }
 }
 return false;
}

//判断鼠标左键按下
bool CGameEngine_Input::IsLButtonUp(){
 for(int i=0;i<ITEMS_NUM;i++){
  if((m_MouseData[i].dwOfs==DIMOFS_BUTTON0) && !(m_MouseData[i].dwData & 0x80)){
   return true;
  }
 }
 return false;
}

//判断鼠标右键按下
bool CGameEngine_Input::IsRButtonPressed(){
 for(int i=0;i<ITEMS_NUM;i++){
  if((m_MouseData[i].dwOfs==DIMOFS_BUTTON1) && (m_MouseData[i].dwData & 0x80)){
   return true;
  }
 }
 return false;
}
//判断鼠标滚轮按下
bool CGameEngine_Input::IsMButtonPressed(){
 for(int i=0;i<ITEMS_NUM;i++){
  if((m_MouseData[i].dwOfs==DIMOFS_BUTTON2) && (m_MouseData[i].dwData & 0x80)){
   return true;
  }
 }
 return false;
}

 

CGameEngine_Input::~CGameEngine_Input()
{
 
}

void CGameEngine_Input::InputRelease(){
 if(m_pKeyboardDevice){
  m_pKeyboardDevice->Unacquire();                   
 }
 if(m_pMouseDevice){
  m_pMouseDevice->Unacquire();                    
 }
 
 SafeRelease(m_pKeyboardDevice);                       
 SafeRelease(m_pMouseDevice);          
 SafeRelease(g_pIDirectInput);                         
}

int CGameEngine_Input::GetMouseX(HWND hWnd)
{
 POINT point;
 GetCursorPos(&point);
 ScreenToClient(hWnd,&point);
 return point.x;
}

int CGameEngine_Input::GetMouseY(HWND hWnd)
{
 POINT point;
 GetCursorPos(&point);
 ScreenToClient(hWnd,&point);
 return point.y;
}