void CLCDOutput::EnumerateDevices()
{
lgLcdDeviceDescEx descEx;
if (LGLCD_INVALID_CONNECTION == m_hConnection)
{
if (ERROR_SUCCESS == lgLcdConnectEx(&m_lcdConnectCtxEx))
{
// make sure we don't work with a stale device handle
m_hConnection = m_lcdConnectCtxEx.connection;
m_hDevice = LGLCD_INVALID_CONNECTION;
}
else
{
return;
}
}
// close the lcd device before we open up another
if (LGLCD_INVALID_DEVICE != m_hDevice)
{
lgLcdClose(m_hDevice);
m_hDevice = LGLCD_INVALID_DEVICE;
}
// Setup the device family to use next time
lgLcdSetDeviceFamiliesToUse(m_hConnection, m_dwDeviceFamiliesSupported, m_dwDeviceFamiliesSupportedReserved1);
ZeroMemory(&descEx, sizeof(lgLcdDeviceDescEx));
DWORD res = ERROR_SUCCESS;
res = lgLcdEnumerateEx(m_hConnection, 0, &descEx);
if (ERROR_SUCCESS != res)
{
if(ERROR_NO_MORE_ITEMS != res)
{
// something happened. Let's close this.
CloseAndDisconnect();
}
return;
}
// ERROR_NO_MORE_ITEMS
lgLcdOpenContext open_ctx;
ZeroMemory(&open_ctx, sizeof(open_ctx));
open_ctx.connection = m_hConnection;
open_ctx.index = 0;
res = lgLcdOpen(&open_ctx);
if (ERROR_SUCCESS != res)
return;
m_hDevice = open_ctx.device;
m_dwButtonState = 0;
// restores
SetAsForeground(m_bSetAsForeground);
}
void CLCDOutput::Shutdown(void)
{
CloseAndDisconnect();
if(0 == InterlockedDecrement(&lInitCount))
{
lgLcdDeInit();
}
LCDUIASSERT(lInitCount >= 0);
}
void CLCDOutput::EnumerateDevices()
{
lgLcdDeviceDesc desc;
if (LGLCD_INVALID_CONNECTION == m_hConnection)
{
if (ERROR_SUCCESS == lgLcdConnect(&m_lcdConnectCtx))
{
// make sure we don't work with a stale device handle
m_hConnection = m_lcdConnectCtx.connection;
m_hDevice = LGLCD_INVALID_CONNECTION;
}
else
{
return;
}
}
// close the lcd device before we open up another
if (LGLCD_INVALID_DEVICE != m_hDevice)
{
lgLcdClose(m_hDevice);
m_hDevice = LGLCD_INVALID_DEVICE;
}
ZeroMemory(&desc, sizeof(desc));
DWORD res = ERROR_SUCCESS;
res = lgLcdEnumerate(m_hConnection, 0, &desc);
if (ERROR_SUCCESS != res)
{
if(ERROR_NO_MORE_ITEMS != res)
{
// something happened. Let's close this.
CloseAndDisconnect();
}
return;
}
lgLcdOpenContext open_ctx;
ZeroMemory(&open_ctx, sizeof(open_ctx));
open_ctx.connection = m_hConnection;
open_ctx.index = 0;
res = lgLcdOpen(&open_ctx);
if (ERROR_SUCCESS != res)
return;
m_hDevice = open_ctx.device;
m_dwButtonState = 0;
}
BOOL CLCDOutput::AnyDeviceOfThisFamilyPresent(DWORD dwDeviceFamilyWanted, DWORD dwReserved1)
{
lgLcdDeviceDescEx descEx;
if (LGLCD_INVALID_CONNECTION == m_hConnection)
{
if (ERROR_SUCCESS == lgLcdConnectEx(&m_lcdConnectCtxEx))
{
// make sure we don't work with a stale device handle
m_hConnection = m_lcdConnectCtxEx.connection;
m_hDevice = LGLCD_INVALID_CONNECTION;
}
else
{
return FALSE;
}
}
// Setup the device family to use next time
lgLcdSetDeviceFamiliesToUse(m_hConnection, dwDeviceFamilyWanted, dwReserved1);
ZeroMemory(&descEx, sizeof(lgLcdDeviceDescEx));
DWORD res = ERROR_SUCCESS;
res = lgLcdEnumerateEx(m_hConnection, 0, &descEx);
if (ERROR_SUCCESS != res)
{
if(ERROR_NO_MORE_ITEMS != res)
{
// something happened. Let's close this.
CloseAndDisconnect();
return FALSE;
}
// Go back to the previous device family we were using
lgLcdSetDeviceFamiliesToUse(m_hConnection, m_dwDeviceFamiliesSupported,
m_dwDeviceFamiliesSupportedReserved1);
return FALSE;
}
// Go back to what was being used
lgLcdSetDeviceFamiliesToUse(m_hConnection, m_dwDeviceFamiliesSupported,
m_dwDeviceFamiliesSupportedReserved1);
return TRUE;
}
