#787: Horizontal mouse scrolling support, patch by Kakurady Drakenar

1 files changed, 16 insertions, 0 deletions

diff --git a/linden/indra/llwindow/llwindowwin32.cpp b/linden/indra/llwindow/llwindowwin32.cpp
index 7bc9a3b..dacee34 100644
--- a/linden/indra/llwindow/llwindowwin32.cpp
+++ b/linden/indra/llwindow/llwindowwin32.cpp
@@ -2259,6 +2259,22 @@ LRESULT CALLBACK LLWindowWin32::mainWindowProc(HWND h_wnd, UINT u_msg, WPARAM w_
                                 }
                                 return 0;
                         }
+#ifdef WM_MOUSEHWHEEL
+                case WM_MOUSEHWHEEL:
+                        {
+                                window_imp->mCallbacks->handlePingWatchdog(window_imp, "Main:WM_MOUSEHWHEEL");
+                                static short z_delta = 0;
+
+                                z_delta += HIWORD(w_param);
+
+                                if (z_delta <= -WHEEL_DELTA || WHEEL_DELTA <= z_delta)
+                                {
+                                        window_imp->mCallbacks->handleHScrollWheel(window_imp, z_delta / WHEEL_DELTA);
+                                        z_delta = 0;
+                                }
+                                return 0;
+                        }
+#endif //WM_MOUSEHWHEEL
                         /*
                         // TODO: add this after resolving _WIN32_WINNT issue
                         case WM_MOUSELEAVE: