public static extern ReturnCode DsmWin32(
[In, Out] TW_IDENTITY origin,
[In, Out] TW_IDENTITY destination,
DataGroups dg,
DataArgumentType dat,
Message msg,
ref TW_DEVICEEVENT data);
private void HandleSourceMsg(Message msg)
{
Debug.WriteLine($"Thread {Thread.CurrentThread.ManagedThreadId}: {nameof(HandleSourceMsg)}({msg})");
switch (msg)
{
case Message.DeviceEvent:
TW_DEVICEEVENT de = default;
var rc = DGControl.DeviceEvent.Get(ref de);
if (rc == ReturnCode.Success)
{
OnDeviceEventReceived(new DeviceEventArgs {
Data = de
});
}
break;
case Message.XferReady:
if (State < TwainState.S6)
{
State = TwainState.S6;
}
DoTransferRoutine();
break;
case Message.CloseDSReq:
if (_state > TwainState.S5)
{
// do it after end of current xfer routine.
_disableDSNow = true;
}
else
{
DGControl.UserInterface.DisableDS(ref _lastEnableUI, false);
}
break;
case Message.CloseDSOK:
DGControl.UserInterface.DisableDS(ref _lastEnableUI, true);
break;
}
}
public ReturnCode Get(ref TW_DEVICEEVENT evt)
{
if (Is32Bit)
{
if (IsWin)
{
return(NativeMethods.DsmWin32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.DeviceEvent, Message.Get, ref evt));
}
if (IsLinux)
{
return(NativeMethods.DsmLinux32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.DeviceEvent, Message.Get, ref evt));
}
if (IsMac)
{
return(NativeMethods.DsmMac32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.DeviceEvent, Message.Get, ref evt));
}
}
if (IsWin)
{
return(NativeMethods.DsmWin64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.DeviceEvent, Message.Get, ref evt));
}
if (IsLinux)
{
return(NativeMethods.DsmLinux64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.DeviceEvent, Message.Get, ref evt));
}
if (IsMac)
{
return(NativeMethods.DsmMac64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.DeviceEvent, Message.Get, ref evt));
}
return(ReturnCode.Failure);
}
/// <summary>
/// Get device events...
/// </summary>
/// <param name="a_dg">Data group</param>
/// <param name="a_msg">Operation</param>
/// <param name="a_twdeviceevent">DEVICEEVENT structure</param>
/// <returns>TWAIN status</returns>
public STS DatDeviceevent(DG a_dg, MSG a_msg, ref TW_DEVICEEVENT a_twdeviceevent)
{
STS sts;
// Submit the work to the TWAIN thread...
if ((m_threadTwain != null) && (m_threadTwain.ManagedThreadId != Thread.CurrentThread.ManagedThreadId))
{
lock (m_lockTwain)
{
// Set our command variables...
ThreadData threaddata = default(ThreadData);
threaddata.twdeviceevent = a_twdeviceevent;
threaddata.dg = a_dg;
threaddata.msg = a_msg;
threaddata.dat = DAT.DEVICEEVENT;
long lIndex = m_twaincommand.Submit(threaddata);
// Submit the command and wait for the reply...
CallerToThreadSet();
ThreadToCallerWaitOne();
// Return the result...
a_twdeviceevent = m_twaincommand.Get(lIndex).twdeviceevent;
sts = m_twaincommand.Get(lIndex).sts;
// Clear the command variables...
m_twaincommand.Delete(lIndex);
}
return (sts);
}
// Log it...
if (Log.GetLevel() > 0)
{
Log.LogSendBefore(a_dg.ToString(), DAT.DEVICEEVENT.ToString(), a_msg.ToString(), "");
}
// Windows...
if (ms_platform == Platform.WINDOWS)
{
// Issue the command...
try
{
if (m_blUseLegacyDSM)
{
sts = (STS)WindowsTwain32DsmEntryDeviceevent(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.DEVICEEVENT, a_msg, ref a_twdeviceevent);
}
else
{
sts = (STS)WindowsTwaindsmDsmEntryDeviceevent(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.DEVICEEVENT, a_msg, ref a_twdeviceevent);
}
}
catch
{
// The driver crashed...
Log.LogSendAfter(STS.BUMMER.ToString(), "");
return (STS.BUMMER);
}
}
// Linux...
else if (ms_platform == Platform.LINUX)
{
// Issue the command...
try
{
if (GetMachineWordBitSize() == 32)
{
sts = (STS)LinuxDsmEntryDeviceevent(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.DEVICEEVENT, a_msg, ref a_twdeviceevent);
}
else
{
sts = (STS)Linux64DsmEntryDeviceevent(ref m_twidentityApp, ref m_twidentityDs, a_dg, DAT.DEVICEEVENT, a_msg, ref a_twdeviceevent);
}
}
catch
{
// The driver crashed...
Log.LogSendAfter(STS.BUMMER.ToString(), "");
return (STS.BUMMER);
}
}
// Mac OS X, which has to be different...
else if (ms_platform == Platform.MACOSX)
{
// Issue the command...
try
{
sts = (STS)MacosxDsmEntryDeviceevent(ref m_twidentitymacosxApp, ref m_twidentitymacosxDs, a_dg, DAT.DEVICEEVENT, a_msg, ref a_twdeviceevent);
}
catch
{
// The driver crashed...
Log.LogSendAfter(STS.BUMMER.ToString(), "");
return (STS.BUMMER);
}
}
// Uh-oh...
else
{
Log.LogSendAfter(STS.BUMMER.ToString(), "");
return (STS.BUMMER);
}
// Log it...
if (Log.GetLevel() > 0)
{
Log.LogSendAfter(sts.ToString(), DeviceeventToCsv(a_twdeviceevent));
}
// All done...
return (AutoDatStatus(sts));
}
/// <summary>
/// Convert the contents of a device event to a string that we can show in
/// our simple GUI...
/// </summary>
/// <param name="a_twdeviceevent">A TWAIN structure</param>
/// <returns>A CSV string of the TWAIN structure</returns>
public string DeviceeventToCsv(TW_DEVICEEVENT a_twdeviceevent)
{
try
{
CSV csv = new CSV();
csv.Add(((TWDE)a_twdeviceevent.Event).ToString());
csv.Add(a_twdeviceevent.DeviceName.Get());
csv.Add(a_twdeviceevent.BatteryMinutes.ToString());
csv.Add(a_twdeviceevent.BatteryPercentage.ToString());
csv.Add(a_twdeviceevent.PowerSupply.ToString());
csv.Add(((double)a_twdeviceevent.XResolution.Whole + ((double)a_twdeviceevent.XResolution.Frac / 65536.0)).ToString());
csv.Add(((double)a_twdeviceevent.YResolution.Whole + ((double)a_twdeviceevent.YResolution.Frac / 65536.0)).ToString());
csv.Add(a_twdeviceevent.FlashUsed2.ToString());
csv.Add(a_twdeviceevent.AutomaticCapture.ToString());
csv.Add(a_twdeviceevent.TimeBeforeFirstCapture.ToString());
csv.Add(a_twdeviceevent.TimeBetweenCaptures.ToString());
return (csv.Get());
}
catch
{
return ("***error***");
}
}
private static extern UInt16 MacosxDsmEntryDeviceevent
(
ref TW_IDENTITY_MACOSX origin,
ref TW_IDENTITY_MACOSX dest,
DG dg,
DAT dat,
MSG msg,
ref TW_DEVICEEVENT twdeviceevent
);
private static extern UInt16 Linux64DsmEntryDeviceevent
(
ref TW_IDENTITY origin,
ref TW_IDENTITY dest,
DG dg,
DAT dat,
MSG msg,
ref TW_DEVICEEVENT twdeviceevent
);
private static extern UInt16 WindowsTwaindsmDsmEntryDeviceevent
(
ref TW_IDENTITY_LEGACY origin,
ref TW_IDENTITY_LEGACY dest,
DG dg,
DAT dat,
MSG msg,
ref TW_DEVICEEVENT twdeviceevent
);