1.3 Keyboard & Mouse之封装CXKeyboard & CXMouse
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1、 何为Keyboard & Mouse
“地球人都知道”。DX9提供的接口 IDirectInputDevice8。
2、 二者的功能
Keyboard：读取键盘的按键信息
Mouse：读取鼠标的按键、位置信息，设置光标属性(如用图片表示光标)。
3、 使用过程
创建 IDirectInput8 对象 DirectInput8Create
创建 IDirectInput8 设备（键盘、鼠标等） CreateDevice
设置设备属性 SetCooperativeLevel
SetDataFormat
获取设备使用权 Acquire
读取设备传入的数据 GetDeviceState
释放设备及 IDirectInput8 Release
设置鼠标光标过程：
创建光标图片资源： 参照surfaces
设置光标为指定的图片 SetCursorProperties
设置光标的初始位置 SetCursorPosition
显示光标 ShowCursor
程序段如下：
LPDIRECTINPUT8 g_lpDI;
LPDIRECTINPUTDEVICE8 g_Keyboard;
LPDIRECTINPUTDEVICE8 g_Mouse
//========================================================
HRESULT Result = DirectInput8Create(g_hInst, DIRECTINPUT_VERSION,
IID_IDirectInput8, (void**)&g_lpDI, NULL);
if(SUCCEEDED(Result))
{
//创建键盘设备
Result = g_lpDI->CreateDevice(GUID_SysKeyboard, &g_lpDIDevice, NULL);
if(SUCCEEDED(Result))
{
g_lpDIDevice->SetCooperativeLevel(g_hWnd, DISCL_FOREGROUND |
DISCL_NONEXCLUSIVE);
g_lpDIDevice->SetDataFormat(&c_dfDIKeyboard);
}
}
//-------------------------------------------------------------------------------------------
//获取按键信息
if(SUCCEEDED(g_Keyboard->Acquire())) //Acquire the device
{
char KeyState[256];
g_Keyboard->GetDeviceState(sizeof(KeyState),(LPVOID)&KeyState);
//根据KeyState返回的数据就可以判断按下何键
}
//====================================================
//创建鼠标
g_lpDI->CreateDevice(GUID_SysMouse, &g_Mouse, NULL);
g_Mouse->SetDataFormat(&c_dfDIMouse);
g_Mouse->SetCooperativeLevel(g_hWnd, DISCL_EXCLUSIVE | DISCL_FOREGROUND);
//------------------------------------------------------------------------
//设置鼠标光标
//获取光标图片
D3DXIMAGE_INFO ImageInfo;
D3DXGetImageInfoFromFile("C:\\Cursor.jpg”, &ImageInfo);
g_pd3dDevice->CreateOffscreenPlainSurface(ImageInfo.Width,
ImageInfo.Height,
ImageInfo.Format,
D3DPOOL_DEFAULT,
&g_MouseCursor,
NULL);
D3DXLoadSurfaceFromFile(g_MouseCursor, NULL, NULL, ("C:\\Cursor.jpg”,
NULL, D3DX_FILTER_NONE, 0xFF000000, NULL);
//设置成指定的光标
g_pd3dDevice->SetCursorProperties(0,0, g_MouseCursor);
//初试位置
g_pd3dDevice->SetCursorPosition(0,0,D3DCURSOR_IMMEDIATE_UPDATE);
//显示光标
g_pd3dDevice->ShowCursor(true);
//-------------------------------------------------------------------------
//获取鼠标信息
if(SUCCEEDED(g_Mouse->Acquire()))
{
DIMOUSESTATE State;
g_Mouse->GetDeviceState(sizeof(DIMOUSESTATE),(LPVOID)&State);
//信息保存在 State中。
}
//==============================================
//释放设备
if(g_lpDI != NULL)
g_lpDI->Release();
4、 封装
CXKeyboard的封装
class CXKeyboard
{
private:
LPDIRECTINPUTDEVICE8 m_pDevice;
char m_KeyState[256];
public:
CXKeyboard (LPDIRECTINPUT8 pInput, HWND hWnd);
~ CXKeyboard();
bool IsKeyPressed(int Key);
HRESULT Update();
};
CXMouseSurface的封装
为了能制作出动画效果的光标，因此需要一个surfaces列表，因此从CXSurface继承一个CXMouseSurface类，使之能够操作多个图片。
class CXMouseSurface : public CXSurface
{
private:
CXMouseSurface* m_pNext;
int MouseSurfaceType;
UINT HotSpotX;
UINT HotSpotY;
public:
CXMouseSurface* GetNext() {return m_pNext;}
void SetNext(CXMouseSurface* Surf) {m_pNext = Surf;}
int GetSurfaceType() {return MouseSurfaceType;}
void SetSurfaceType(int Type) {MouseSurfaceType = Type;}
UINT GetHotSpotX() {return HotSpotX;}
UINT GetHotSpotY() {return HotSpotY;}
void SetHotSpotX (UINT X) {HotSpotX = X;}
void SetHotSpotY (UINT Y) {HotSpotY = Y;}
CXMouseSurface(LPDIRECT3DDEVICE9 pDevice) : CXSurface(pDevice)
{m_pNext = NULL;}
CXMouseSurface() : CXSurface() {m_pNext = NULL;}
}；
CXMouse的封装
class CXMouse
{
private:
CXMouseSurface* m_Surface; //指向光标列表
CXMouseSurface* m_CurrentCursorSurface; //当前光标
LPDIRECTINPUTDEVICE8 m_pDevice;
LPDIRECT3DDEVICE9 m_p3DDevice;
DIMOUSESTATE m_State;
LONG m_iX;
LONG m_iY;
public:
CXMouse (LPDIRECT3DDEVICE9 pDevice, LPDIRECTINPUT8 pInput, HWND hWnd,
bool Exclusive);
~ CXMouse();
HRESULT Update();
LONG GetXPos();
LONG GetYPos();
bool IsButtonPressed(int Button);
HRESULT SetCursorImage();
HRESULT SetMouseCursor(char* FilePath, UINT HotSpotX, UINT HotSpotY,
int Type);
void AddCursorSurface(CXMouseSurface* Surface);
CXMouseSurface* GetFirstSurface() {return m_Surface;}
bool SetCursor(int Type);
CXMouseSurface* GetCurrentCursor() {return m_CurrentCursorSurface;}
void SetCurrentCursor(CXMouseSurface* Surface)
{m_CurrentCursorSurface = Surface;}
void SetCursorPosition(int X, int Y);
HRESULT SetCursorVisible(bool Show);
};