一个DirectInput演示程序
一个DirectInput演示程序
使用DirectInput8组件，获取键盘或鼠标的缓冲数据方式，并使用了事件通知将数据显示在屏幕上。程序首先创建DirectInput8对象、鼠标键盘设备，并为它们设置相应的方式，后进入主循环。主循环使用阻塞方式，等待鼠标或键盘事件到来（鼠标移动、按键、滚轮，键盘击键），以下为全部代码，并附有详细注释。程序是VC6控制台模式下的，注意Win32函数GetConsoleWindow()的使用，要首先声明它才可使用。
该程序的事件触发思想很有用，这里用了主循环（线程）里阻塞等待，完全可以新创建线程里阻塞等待。其实这就是一个小型数据采集系统，只不过数据源是鼠标键盘硬件。
#include <stdio.h>
#include <dinput.h>
#pragma comment(lib,"dxerr8.lib ")
#pragma comment(lib,"dinput8.lib")
#pragma comment(lib,"dxguid.lib")
#define SAMPLE_BUFFER_SIZE 16
extern "C" WINBASEAPI HWND WINAPI GetConsoleWindow ();
HRESULT ReadBufferedData_kb();
HRESULT ReadBufferedData_ms();
LPDIRECTINPUT 8 g _pDI = NULL;
LPDIRECTINPUTDEVICE 8 g _pKeyboard = NULL;
LPDIRECTINPUTDEVICE 8 g _pMouse = NULL;
HANDLE g_Event = NULL;
int main()
{
/////////////////////////////////////////////////////////////////////////////////////////////
//创建事件，为自动型（使用完自动置为无信号状态），初始化为无信号状态
g_Event = CreateEvent(NULL, FALSE, FALSE, NULL);
/////////////////////////////////////////////////////////////////////////////////////////////
//创建DirectInput8对象
HRESULT hr;
if( FAILED( hr = DirectInput8Create( GetModuleHandle(NULL), DIRECTINPUT_VERSION,
IID_IDirectInput8, (VOID**)&g_pDI, NULL ) ) )
{
}
//－－1－－
/////////////////////////////////////////////////////////////////////////////////////////////
//创建DirectInput8设备（键盘）
if( FAILED( hr = g_pDI->CreateDevice( GUID_SysKeyboard, &g_pKeyboard, NULL ) ) )
return hr;
/////////////////////////////////////////////////////////////////////////////////////////////
//为键盘设置格式
if( FAILED( hr = g_pKeyboard->SetDataFormat( &c_dfDIKeyboard ) ) )
return hr;
/////////////////////////////////////////////////////////////////////////////////////////////
//为键盘设置行为
hr = g_pKeyboard->SetCooperativeLevel( GetConsoleWindow(), DISCL_BACKGROUND | DISCL_NONEXCLUSIVE );
/////////////////////////////////////////////////////////////////////////////////////////////
//为键盘设置缓冲方式
DIPROPDWORD dipdw;
dipdw.diph.dwSize = sizeof(DIPROPDWORD);
dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER);
dipdw.diph.dwObj = 0;
dipdw.diph.dwHow = DIPH_DEVICE;
dipdw.dwData = SAMPLE_BUFFER_SIZE; // Arbitary buffer size
if( FAILED( hr = g_pKeyboard->SetProperty( DIPROP_BUFFERSIZE, &dipdw.diph ) ) )
return hr;
/////////////////////////////////////////////////////////////////////////////////////////////
//为键盘安装事件通知关联，并准备获取采集
g_pKeyboard->SetEventNotification(g_Event);
g_pKeyboard->Acquire();
//////////////////////////////////////////////////////////////////////////////////////
//－－2－－
/////////////////////////////////////////////////////////////////////////////////////////////
//创建DirectInput8设备（鼠标），一下过程和键盘设置相同，不再注释
if( FAILED( hr = g_pDI->CreateDevice( GUID_SysMouse, &g_pMouse, NULL ) ) )
return hr;
if( FAILED( hr = g_pMouse->SetDataFormat( &c_dfDIMouse2 ) ) )
return hr;
hr = g_pMouse->SetCooperativeLevel( GetConsoleWindow(), DISCL_BACKGROUND | DISCL_NONEXCLUSIVE );
dipdw.diph.dwSize = sizeof(DIPROPDWORD);
dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER);
dipdw.diph.dwObj = 0;
dipdw.diph.dwHow = DIPH_DEVICE;
dipdw.dwData = SAMPLE_BUFFER_SIZE;
if( FAILED( hr = g_pMouse->SetProperty( DIPROP_BUFFERSIZE, &dipdw.diph ) ) )
return hr;
g_pMouse->SetEventNotification(g_Event);
g_pMouse->Acquire();
//////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////
//主线程
DWORD dwResult=0;
while(1)
{
dwResult = WaitForSingleObject(g_Event, INFINITE); //无限阻塞
ReadBufferedData_kb(); //读键盘数据并显示
ReadBufferedData_ms();//读鼠标数据并显示
}
//////////////////////////////////////////////////////////////////////////////////////
}
HRESULT ReadBufferedData_kb()
{
TCHAR strNewText[256*5 + 1] = TEXT("");
TCHAR strLetter[50];
DIDEVICEOBJECTDATA didod[ SAMPLE_BUFFER_SIZE ]; // Receives buffered data
DWORD dwElements;
DWORD i;
HRESULT hr;
if( NULL == g_pKeyboard )
return S_OK;
dwElements = SAMPLE_BUFFER_SIZE;
hr = g_pKeyboard->GetDeviceData( sizeof(DIDEVICEOBJECTDATA),
didod, &dwElements, 0 );
if( hr != DI_OK )
{
hr = g_pKeyboard->Acquire();
while( hr == DIERR_INPUTLOST )
hr = g_pKeyboard->Acquire();
// Update the dialog text
if( hr == DIERR_OTHERAPPHASPRIO ||
hr == DIERR_NOTACQUIRED )
{
}
return S_OK;
}
if( FAILED(hr) )
return hr;
for( i = 0; i < dwElements; i++ )
{
wsprintf( strLetter, "0x%02x%s ", didod[ i ].dwOfs,
(didod[ i ].dwData & 0x80) ? "按下" : "抬起");
strcat( strNewText, strLetter );
}
printf("%s",strNewText);
return S_OK;
}
HRESULT ReadBufferedData_ms()
{
TCHAR strNewText[256*5 + 1] = TEXT("");
TCHAR strElement[50];
DIDEVICEOBJECTDATA didod[ SAMPLE_BUFFER_SIZE ]; // Receives buffered data
DWORD dwElements;
DWORD i;
HRESULT hr;
if( NULL == g_pMouse )
return S_OK;
dwElements = SAMPLE_BUFFER_SIZE;
hr = g_pMouse->GetDeviceData( sizeof(DIDEVICEOBJECTDATA),
didod, &dwElements, 0 );
if( hr != DI_OK )
{
hr = g_pMouse->Acquire();
while( hr == DIERR_INPUTLOST )
hr = g_pMouse->Acquire();
if( hr == DIERR_OTHERAPPHASPRIO ||
hr == DIERR_NOTACQUIRED )
{
}
return S_OK;
}
if( FAILED(hr) )
return hr;
for( i = 0; i < dwElements; i++ )
{
switch( didod[ i ].dwOfs )
{
case DIMOFS_BUTTON0:
strcpy( strElement, " 左键 " );
break;
case DIMOFS_BUTTON1:
strcpy( strElement, " 右键 " );
break;
case DIMOFS_BUTTON2:
strcpy( strElement, " 中键 " );
break;
case DIMOFS_BUTTON3:
strcpy( strElement, "B3" );
break;
case DIMOFS_X:
strcpy( strElement, " 水平 " );
break;
case DIMOFS_Y:
strcpy( strElement, " 垂直 " );
break;
case DIMOFS_Z:
strcpy( strElement, " 滚动 " );
break;
default:
strcpy( strElement, "" );
}
switch( didod[ i ].dwOfs )
{
case DIMOFS_BUTTON0:
case DIMOFS_BUTTON1:
case DIMOFS_BUTTON2:
case DIMOFS_BUTTON3:
if( didod[ i ].dwData & 0x80 )
strcat( strElement, " 抬起 " );
else
strcat( strElement, " 按下 " );
break;
case DIMOFS_X:
case DIMOFS_Y:
case DIMOFS_Z:
{
TCHAR strCoordValue[255];
wsprintf( strCoordValue, "%d ", didod[ i ].dwData );
strcat( strElement, strCoordValue );
break;
}
}
strcat( strNewText, strElement );
}
printf("%s/n",strNewText);
return S_OK;
}