Some WIP on this:

diff --git a/src/lib/server/Server.cpp b/src/lib/server/Server.cpp
index 7d3a34ea..73dad1ee 100644
--- a/src/lib/server/Server.cpp
+++ b/src/lib/server/Server.cpp
@@ -23,6 +23,7 @@
 #include "base/Log.h"
 #include "base/TMethodEventJob.h"
 #include "base/TMethodJob.h"
+#include "common/basic_types.h"
 #include "common/stdexcept.h"
 #include "deskflow/AppUtil.h"
 #include "deskflow/DropHelper.h"
@@ -42,11 +43,11 @@
 #include "server/PrimaryClient.h"
 
 #include <climits>
+#include <cmath>
 #include <cstdlib>
 #include <cstring>
 #include <ctime>
-#include <cmath>
-
+#include <optional>
 
 using namespace deskflow::license;
 using namespace deskflow::server;
@@ -1791,23 +1792,38 @@ void Server::sendDragInfo(BaseClientProxy *newScreen) {
   }
 }
 
-void Server::onMouseMoveSecondary(SInt32 dx, SInt32 dy) {
-  LOG((CLOG_DEBUG2 "onMouseMoveSecondary initial %+d,%+d", dx, dy));
-  const char* envVal = std::getenv("SYNERGY_MOUSE_ADJUSTMENT");
+std::optional<SInt32> getMouseAdjustment() {
+
+  const auto kMouseAdjustmentEnvVar = "SYNERGY_MOUSE_ADJUSTMENT";
+  const auto envVal = std::getenv(kMouseAdjustmentEnvVar);
+
   if (envVal != nullptr) {
     try {
-      double multiplier = std::stod(envVal); // Convert to double
-      SInt32 adjustedDx = static_cast<SInt32>(std::round(dx * multiplier)); // Apply multiplier and round
-      SInt32 adjustedDy = static_cast<SInt32>(std::round(dy * multiplier));
-      LOG((CLOG_DEBUG2 "Adjusted to %+d,%+d using multiplier %.2f", adjustedDx, adjustedDy, multiplier));
-      dx = adjustedDx; // Update dx and dy to adjusted values
-      dy = adjustedDy;
-    } catch (const std::exception& e) {
-      // Log the error message from the exception
-      LOG((CLOG_ERR "Invalid SYNERGY_MOUSE_ADJUSTMENT value: %s. Exception: %s", envVal, e.what()));
+      return std::stod(envVal);
+    } catch (const std::invalid_argument &e) {
+      LOG_ERR("invalid %s value: %s", kMouseAdjustmentEnvVar, envVal);
+      LOG_ERR("%s", e.what());
+    } catch (const std::out_of_range &e) {
+      LOG_ERR("invalid %s value: %s", kMouseAdjustmentEnvVar, envVal);
+      LOG_ERR("%s", e.what());
     }
   } else {
-    LOG((CLOG_DEBUG1 "SYNERGY_MOUSE_ADJUSTMENT not set, using original values %+d,%+d", dx, dy));
+    LOG_DEBUG2("%s not set", kMouseAdjustmentEnvVar);
+  }
+
+  return std::nullopt;
+}
+
+void Server::onMouseMoveSecondary(SInt32 dx, SInt32 dy) {
+  LOG((CLOG_DEBUG2 "onMouseMoveSecondary initial %+d,%+d", dx, dy));
+
+  const auto adjustment = getMouseAdjustment();
+  if (adjustment.has_value()) {
+    const auto adjustedDx =
+        static_cast<SInt32>(std::round(dx * adjustment.value()));
+    const auto adjustedDy =
+        static_cast<SInt32>(std::round(dy * adjustment.value()));
+    LOG((CLOG_DEBUG2 "onMouseMoveSecondary adjusted %+d,%+d", dx, dy));
   }
 
   // mouse move on secondary (client's) screen

/bounty $200

💎 $200 bounty • Deskflow

Steps to solve:

1. Start working: Comment /attempt #7582 with your implementation plan
2. Submit work: Create a pull request including /claim #7582 in the PR body to claim the bounty
3. Receive payment: 100% of the bounty is received 2-5 days post-reward. Make sure you are eligible for payouts

Thank you for contributing to deskflow/deskflow!

Add a bounty • Share on socials

/attempt #7582

I have made a few changes, and the changes mentioned in the comment have been applied. I'm working on the GUI now.

I was waiting to build the project properly before declaring my /attempt #7582

Please note the env var is NOT SYNERGY_MOUSE_ADJUSTMENT It's DESKFLOW_MOUSE_ADJUSTMENT

Thanks @sithlord48. I tried SYNERGY_ at first but after not finding I went through the file directly 😅

Can I get a hand on something else? I'm on Mac M1, tried to run the app with the instructions from the Wiki Build page. Both cmake commands ran without issues or warnings, but after building, when I execute open build/bin/Deskflow.app, I get an error saying "Deskflow quit unexpectedly.". Let me know if there's any additional information I can provide.

Is there any additional steps other than what is mentioned on wiki build page?

yeah welcome to the most annoying thing ever macOS..

so i do two things locally

1. comment out src/apps/deskflow-gui/cmakelists.txt lines 102 - 106 to stop the macdeployqt from running
2. remove your previous build folder and rebuild
3. you may need to run xattr -c on the app <build_path>/bin/Deskflow.app
   for some reason when i build locally if i run macdeployqt i can never get it to run proper even with xattr -c

@ologbonowiwi I've made a PR to fix the CMake part can you try it to see if this resolves the running issues for you #8037 . With this running as normal should work

nice @sithlord48, thank you!

I was able to run after removing this command, but now I'm stuck on something else. I've tried to add a QSpinBox on the dialog ui, but after I changed the ui XML file, everytime I rebuild and try to open the app, I see only a "alert" asking for accessibility access; I allowed on the settings but kept seeing the same error still.

I made some progress yesterday in terms of figuring out the .ui and .cpp files I need to chance to add the new mouse speed multiplier option, but couldn't see it working yet because of this annoying issue. any clue?

do I need to have all the cpp changes in place for the app to work? on my first attempt I changed both, still didn't seemed right (the permission window kept popping up). then I restarted and changed only ui files but still found the same issue

ps: I never built anything on qt before, so it may be a silly error I caused but I'm not seeing lol

ps2: is there any way I can bypass the accessibility permission? this may fix the issue 🤔

accessibility access

Ideas:

• Try running the binary from command line rather than double clicking the app bundle:
  ./build/bin/Deskflow.app/Contents/MacOS/Deskflow
• Alternatively, see: wiki/Workarounds#macOS-accessibility-permissions

should be less of an issue with our selfsigned builds now