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Added more event debug logs in sample.

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This commit is contained in:
Eugene Wang 2023-04-07 08:39:08 -04:00
parent 20df6fc74c
commit 60ef4c144b
2 changed files with 28 additions and 4 deletions
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30
samples/WinForm32/Form1.cs
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@ -4,6 +4,9 @@ using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Reflection;
using System.Windows.Forms;
@ -12,6 +15,7 @@ namespace WinFormSample
public partial class Form1 : Form
{
private TwainAppSession twain;
private readonly string saveFolder;
public Form1()
{
@ -32,6 +36,9 @@ namespace WinFormSample
capListView.SetDoubleBuffered(true);
saveFolder = Path.Combine(Path.GetTempPath(), "ntwain-sample");
Directory.CreateDirectory(saveFolder);
this.Disposed += Form1_Disposed;
}
@ -62,22 +69,39 @@ namespace WinFormSample
private void Twain_DeviceEvent(TwainAppSession sender, TW_DEVICEEVENT e)
{
Debug.WriteLine($"[thread {Environment.CurrentManagedThreadId}] device event {e}.");
}
private void Twain_TransferError(TwainAppSession sender, TransferErrorEventArgs e)
{
if (e.Exception != null)
{
Debug.WriteLine($"[thread {Environment.CurrentManagedThreadId}] transfer error {e.Exception}.");
}
else
{
Debug.WriteLine($"[thread {Environment.CurrentManagedThreadId}] transfer error {e.Code}.");
}
}
private void Twain_DataTransferred(TwainAppSession sender, DataTransferredEventArgs e)
{
Debug.WriteLine($"Image transferred with info {e.ImageInfo}");
Debug.WriteLine($"[thread {Environment.CurrentManagedThreadId}] data transferred with info {e.ImageInfo}");
if (e.Data == null) return;
using (var stream = new MemoryStream(e.Data))
using (var img = Image.FromStream(stream))
{
var saveFile = Path.Combine(saveFolder, (DateTime.Now.Ticks / 1000) + ".png");
img.Save(saveFile, ImageFormat.Png);
Debug.WriteLine($"Saved image to {saveFile}");
}
}
private void Twain_TransferReady(TwainAppSession sender, TransferReadyEventArgs e)
{
Debug.WriteLine($"[thread {Environment.CurrentManagedThreadId}] transfer ready.");
}
private void Twain_DefaultSourceChanged(TwainAppSession sender, TW_IDENTITY_LEGACY ds)
@ -87,7 +111,7 @@ namespace WinFormSample
private void Twain_StateChanged(TwainAppSession sender, STATE state)
{
Invoke(()=> lblState.Text = state.ToString());
Invoke(() => lblState.Text = state.ToString());
}
private void Twain_CurrentSourceChanged(TwainAppSession sender, TW_IDENTITY_LEGACY ds)

2
src/NTwain/TwainAppSession.Windows.cs
View File

@ -92,7 +92,7 @@ namespace NTwain
handled = rc == TWRC.DSEVENT;
if (_procEvent.TWMessage != 0 && (handled || rc == TWRC.NOTDSEVENT))
{
Debug.WriteLine("Thread {0}: CheckIfTwainMessage at state {1} with MSG={2}.", Thread.CurrentThread.ManagedThreadId, State, (MSG)_procEvent.TWMessage);
Debug.WriteLine($"[thread {Environment.CurrentManagedThreadId}]: CheckIfTwainMessage at state {State} with MSG={_procEvent.TWMessage}.");
HandleSourceMsg((MSG)_procEvent.TWMessage);
}
}