move notifyCloseCancel invoking to eventProcess - we trust that the eventProcess always called when show setting UI

twain/load_sane.h

@@ -22,13 +22,13 @@ namespace load_sane_util
 	int move_file(const wchar_t* from, const wchar_t* to);
 
 	template<typename ... Args>
-	void to_log(const wchar_t* fmt, Args ... args)
+	void to_log(int level, const wchar_t* fmt, Args ... args)
 	{
 		size_t 		size = swprintf(nullptr, 0, fmt, args ...) + 2;
 		std::unique_ptr<wchar_t[]> buf(new wchar_t[size]);
 	
 		swprintf(buf.get(), size, fmt, args ...);
-		log_info(buf.get(), 0);
+		log_info(buf.get(), level);
 	}
 };
 

twain/twain/huagaods.cpp

@@ -918,6 +918,16 @@ Result huagao_ds::eventProcess(const Identity&, Event& event)
 	//	if(ev)
 	//		handle_scanner_event(ev);
 	//}
+	/*if (xfer_ready_)
+	{
+		notifyXferReady();
+		xfer_ready_ = false;
+	}
+	else*/ if (notfify_close_)
+	{
+		notifyCloseCancel();
+		notfify_close_ = false;
+	}
 	 event.setMessage(Msg::Null);
 
 
@@ -1102,6 +1112,7 @@ Result huagao_ds::userInterfaceDisable(const Identity&, UserInterface& ui)
 }
 Result huagao_ds::userInterfaceEnable(const Identity&, UserInterface& ui)
 {
+	notfify_close_ = false;
 	bUiOnly_ = false;
 	show_setting_ = false;
 	if (!ui.showUi())
@@ -1377,8 +1388,10 @@ Result huagao_ds::imageNativeXferGet(const Identity& id, ImageNativeXfer& data)
 {
 	if (!scanner_.get())
 		return seqError();
-	else if(get_scanned_image_count(-1) == 0)
+	else if (get_scanned_image_count(-1) == 0)
+	{
 		return { ReturnCode::Failure, condition_code_from_hg_error(scanner_->last_error()) };
+	}
 
 	IScanImg* img = scanner_->take_first_image(TWAIN_XFER_Native);
 
@@ -1638,21 +1651,29 @@ Result huagao_ds::call(const Identity& origin, DataGroup dg, Dat dat, Msg msg, v
 			load_sane_util::log_info(buf, 7);
 			if ((int)rt.returnCode() && rt.returnCode() != ReturnCode::NotDsEvent)
 			{
+				bool changed = false;
 				if (dat == Dat::PendingXfers && Msg::Reset == msg && scanner_status_ == SCANNER_STATUS_STOPPED)	// PurvarScannerForHomework.exe - move modifying from EndXfer to xfer::Reset
+				{
+					changed = true;
 					rt = success();
+				}
 				else if (rt.status() == ConditionCode::SeqError)
 				{
 					if (dat == Dat::ImageInfo && Msg::Get == msg && scanner_status_ == SCANNER_STATUS_STOPPED)	// for demo.exe
 					{
+						changed = true;
 						rt = { ReturnCode::Success, ConditionCode::Bummer };
 					}
 					else if (dat == Dat::PendingXfers && Msg::EndXfer == msg && scanner_status_ == SCANNER_STATUS_STOPPED)	// for photoshop.exe
 					{
 						// PendingXfers& data
 						(static_cast<PendingXfers*>(data))->setCount(0);
+						changed = true;
 						rt = { ReturnCode::Success, ConditionCode::Success };
 					}
 				}
+				if(changed)
+					load_sane_util::to_log(7, L"  modify result to {%s, %s}.\r\n", desc_return_code(rt, rcs), desc_condition_code((ConditionCode)(Status)rt, cs));
 			}
 		}
 
@@ -3607,7 +3628,23 @@ int huagao_ds::handle_scanner_event(int ev, bool from_event_proc)
 		break;
 	case SANE_EVENT_UI_CLOSE_SETTING:
 		scanner_->ui_hide();
-		rc = notifyCloseCancel();
+		notfify_close_ = true;
+		//if(main_thread_id_ == GetCurrentThreadId())
+			//rc = notifyCloseCancel();
+		//else
+		//{
+		//	HANDLE	thrd = OpenThread(THREAD_ALL_ACCESS, FALSE, main_thread_id_);
+		//	int		err = -1;
+		//	if (thrd)
+		//	{
+		//		if (QueueUserAPC(&huagao_ds::notify_close, thrd, (ULONG_PTR)this))
+		//			err = 0;
+		//		else
+		//			err = GetLastError();
+		//		CloseHandle(thrd);
+		//	}
+		//	load_sane_util::to_log(3, L"Notify close setting UI in different thread(%x), invoke 'notifyCloseCancel' in enable-thread %x(%x), result %d\r\n", GetCurrentThreadId(), main_thread_id_, thrd, err);
+		//}
 		//if (!Twpp::success(rc))
 		//{
 		//	rc = notifyXferReady();	// 好分数需要再通知 FAINT :( - modified on 2022-10-20

twain/twain/huagaods.hpp

@@ -58,6 +58,7 @@ class huagao_ds : public Twpp::SourceFromThis<huagao_ds> {
     bool            show_setting_;
     int             count_;
     volatile bool   is_getting_count_;
+    volatile bool   notfify_close_ = false;
     static std::string get_hidedlg_path(void);
     static void showmsg(const char* msg, int err);
     static int __stdcall on_scanner_event(int ev, void* param);