From b555b3a535cf46f6ed0b8d242b2f1daa1398dae9 Mon Sep 17 00:00:00 2001
From: yuanyuanxiang <962914132@qq.com>
Date: Fri, 2 Jan 2026 12:12:35 +0100
Subject: [PATCH] Improve: Reduce mouse operation lag during remote control

---
 server/2015Remote/2015RemoteDlg.cpp | 2 ++
 server/2015Remote/ScreenSpyDlg.cpp  | 6 +++++-
 server/2015Remote/Server.h          | 4 ++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/server/2015Remote/2015RemoteDlg.cpp b/server/2015Remote/2015RemoteDlg.cpp
index 35a8159..cdce259 100644
--- a/server/2015Remote/2015RemoteDlg.cpp
+++ b/server/2015Remote/2015RemoteDlg.cpp
@@ -2573,6 +2573,7 @@ VOID CMy2015RemoteDlg::MessageHandle(CONTEXT_OBJECT* ContextObject)
         break;
     }
     case TOKEN_BITMAPINFO_HIDE: { // 虚拟桌面【x】
+        ContextObject->SetNoDelay(TRUE);
         g_2015RemoteDlg->SendMessage(WM_OPENHIDESCREENDLG, 0, (LPARAM)ContextObject);
         break;
     }
@@ -2597,6 +2598,7 @@ VOID CMy2015RemoteDlg::MessageHandle(CONTEXT_OBJECT* ContextObject)
         break;
     }
     case TOKEN_BITMAPINFO: { // 远程桌面【x】
+        ContextObject->SetNoDelay(TRUE);
         g_2015RemoteDlg->SendMessage(WM_OPENSCREENSPYDIALOG, 0, (LPARAM)ContextObject);
         break;
     }
diff --git a/server/2015Remote/ScreenSpyDlg.cpp b/server/2015Remote/ScreenSpyDlg.cpp
index 85e8ce9..d296b6e 100644
--- a/server/2015Remote/ScreenSpyDlg.cpp
+++ b/server/2015Remote/ScreenSpyDlg.cpp
@@ -805,7 +805,11 @@ VOID CScreenSpyDlg::SendCommand(const MYMSG* Msg)
         int dx = abs(Msg->pt.x - m_lastMousePoint.x);
         int dy = abs(Msg->pt.y - m_lastMousePoint.y);
         int dist_sq = dx * dx + dy * dy;
-        if (time_elapsed < 200 && dist_sq < 18 * 18) {
+
+        bool fastMove = dist_sq > 50 * 50;
+        int minInterval = fastMove ? 33 : 16;
+        int minDistSq = fastMove ? 10 * 10 : 3 * 3;
+        if (time_elapsed < minInterval && dist_sq < minDistSq) {
             return;
         }
         m_lastMouseMove = now;
diff --git a/server/2015Remote/Server.h b/server/2015Remote/Server.h
index 66f7695..b2f23c2 100644
--- a/server/2015Remote/Server.h
+++ b/server/2015Remote/Server.h
@@ -693,6 +693,10 @@ public:
     {
         GroupName = group;
     }
+    void SetNoDelay(BOOL bNoDelay = TRUE)
+    {
+        setsockopt(sClientSocket, IPPROTO_TCP, TCP_NODELAY, (char*)&bNoDelay, sizeof(BOOL));
+    }
 } CONTEXT_OBJECT, * PCONTEXT_OBJECT;
 
 typedef CList<PCONTEXT_OBJECT> ContextObjectList;