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Add call to open DS in wrapper.

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This commit is contained in:
Eugene Wang
2021-04-21 13:06:02 -04:00
parent 66b5270d37
commit 091470c0b0
5 changed files with 95 additions and 21 deletions
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42
NTwain/TwainSession.cs
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@@ -55,6 +55,11 @@ namespace NTwain
GC.SuppressFinalize(this);
}
/// <summary>
/// Gets the low-level twain object.
/// </summary>
public TWAIN TWAIN { get { return _twain; } }
#region event callbacks
private void HandleUIThreadAction(Action action)
@@ -85,7 +90,7 @@ namespace NTwain
while (true)
{
// Try to get an event...
twdeviceevent = default(TW_DEVICEEVENT);
twdeviceevent = default;
sts = _twain.DatDeviceevent(DG.CONTROL, MSG.GET, ref twdeviceevent);
if (sts != STS.SUCCESS)
{
@@ -124,6 +129,17 @@ namespace NTwain
get { return _twain.GetState(); }
}
/// <summary>
/// Gets the manager status. Useful after getting a non-success return code.
/// </summary>
/// <returns></returns>
public TW_STATUS GetStatus()
{
TW_STATUS stat = default;
var sts = _twain.DatStatus(DG.CONTROL, MSG.GET, ref stat);
return stat;
}
/// <summary>
/// Opens the TWAIN data source manager.
/// This needs to be done before anything else.
@@ -152,7 +168,7 @@ namespace NTwain
var list = new List<TW_IDENTITY>();
if (State > STATE.S2)
{
var twidentity = default(TW_IDENTITY);
TW_IDENTITY twidentity = default;
STS sts;
for (sts = _twain.DatIdentity(DG.CONTROL, MSG.GETFIRST, ref twidentity);
@@ -172,7 +188,7 @@ namespace NTwain
{
get
{
var twidentity = default(TW_IDENTITY);
TW_IDENTITY twidentity = default;
var sts = _twain.DatIdentity(DG.CONTROL, MSG.GETDEFAULT, ref twidentity);
if (sts == STS.SUCCESS) return twidentity;
return null;
@@ -189,7 +205,8 @@ namespace NTwain
}
/// <summary>
/// Gets the currently open device.
/// Gets or sets the currently open device.
/// Setting it will try to open it.
/// </summary>
public TW_IDENTITY? CurrentDevice
{
@@ -197,7 +214,7 @@ namespace NTwain
{
if (State > STATE.S3)
{
var twidentity = default(TW_IDENTITY);
TW_IDENTITY twidentity = default;
if (TWAIN.CsvToIdentity(ref twidentity, _twain.GetDsIdentity()))
{
return twidentity;
@@ -205,6 +222,15 @@ namespace NTwain
}
return null;
}
set
{
StepDown(STATE.S3);
if (value.HasValue)
{
var twidentity = value.Value;
_twain.DatIdentity(DG.CONTROL, MSG.OPENDS, ref twidentity);
}
}
}
/// <summary>
@@ -213,7 +239,7 @@ namespace NTwain
/// <param name="state"></param>
public void StepDown(STATE state)
{
var twpendingxfers = default(TW_PENDINGXFERS);
TW_PENDINGXFERS twpendingxfers = default;
// Make sure we have something to work with...
if (_twain == null)
@@ -239,14 +265,14 @@ namespace NTwain
// 5 --> 4
if ((_twain.GetState() == STATE.S5) && (state < STATE.S5))
{
var twuserinterface = default(TW_USERINTERFACE);
TW_USERINTERFACE twuserinterface = default;
_twain.DatUserinterface(DG.CONTROL, MSG.DISABLEDS, ref twuserinterface);
}
// 4 --> 3
if ((_twain.GetState() == STATE.S4) && (state < STATE.S4))
{
var twidentity = default(TW_IDENTITY);
TW_IDENTITY twidentity = default;
TWAIN.CsvToIdentity(ref twidentity, _twain.GetDsIdentity());
_twain.DatIdentity(DG.CONTROL, MSG.CLOSEDS, ref twidentity);
}