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Integrated message thread inside TwainAppSession as a different OpenDSM method.

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This commit is contained in:
Eugene Wang
2023-04-15 06:33:12 -04:00
parent 0e5aef00e5
commit 1364150697
8 changed files with 142 additions and 34 deletions
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24
samples/WinForm32/Form1.cs
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@@ -19,7 +19,6 @@ namespace WinFormSample
public partial class Form1 : Form
{
bool useDiyPump = true;
MessagePumpThread pump;
TwainAppSession twain;
readonly string saveFolder;
readonly Stopwatch watch = new();
@@ -36,7 +35,6 @@ namespace WinFormSample
var libVer = FileVersionInfo.GetVersionInfo(typeof(TwainAppSession).Assembly.Location).ProductVersion;
Text += $"{(TWPlatform.Is32bit ? " 32bit" : " 64bit")} on NTwain {libVer}";
pump = new MessagePumpThread();
TWPlatform.PreferLegacyDSM = false;
twain = new TwainAppSession(Assembly.GetExecutingAssembly().Location);
@@ -87,35 +85,29 @@ namespace WinFormSample
}
}
protected override void OnHandleCreated(EventArgs e)
protected override async void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
if (useDiyPump)
{
_ = pump.AttachAsync(twain);
var sts = await twain.OpenDSMAsync();
Debug.WriteLine($"OpenDSMAsync={sts}");
}
else
{
var hwnd = this.Handle;
var rc = twain.OpenDSM(hwnd, SynchronizationContext.Current!);
var sts = twain.OpenDSM(hwnd, SynchronizationContext.Current!);
twain.AddWinformFilter();
Debug.WriteLine($"OpenDSM={rc}");
Debug.WriteLine($"OpenDSM={sts}");
}
}
protected override void OnClosing(CancelEventArgs e)
{
if (useDiyPump)
{
pump.Detatch();
}
else
{
var finalState = twain.TryStepdown(STATE.S2);
Debug.WriteLine($"Stepdown result state={finalState}");
twain.RemoveWinformFilter();
}
var finalState = twain.TryStepdown(STATE.S2);
Debug.WriteLine($"Stepdown result state={finalState}");
twain.RemoveWinformFilter();
base.OnClosing(e);
}