diff options
Diffstat (limited to 'indra/llwindow/llwindowwin32.cpp')
| -rw-r--r-- | indra/llwindow/llwindowwin32.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp index 8fefb119bc..3c69aa98c4 100644 --- a/indra/llwindow/llwindowwin32.cpp +++ b/indra/llwindow/llwindowwin32.cpp @@ -2662,6 +2662,42 @@ LRESULT CALLBACK LLWindowWin32::mainWindowProc(HWND h_wnd, UINT u_msg, WPARAM w_ return 0; } */ + case WM_MOUSEHWHEEL: + { + window_imp->mCallbacks->handlePingWatchdog(window_imp, "Main:WM_MOUSEHWHEEL"); + static short h_delta = 0; + + RECT client_rect; + + // eat scroll events that occur outside our window, since we use mouse position to direct scroll + // instead of keyboard focus + // NOTE: mouse_coord is in *window* coordinates for scroll events + POINT mouse_coord = {(S32)(S16)LOWORD(l_param), (S32)(S16)HIWORD(l_param)}; + + if (ScreenToClient(window_imp->mWindowHandle, &mouse_coord) + && GetClientRect(window_imp->mWindowHandle, &client_rect)) + { + // we have a valid mouse point and client rect + if (mouse_coord.x < client_rect.left || client_rect.right < mouse_coord.x + || mouse_coord.y < client_rect.top || client_rect.bottom < mouse_coord.y) + { + // mouse is outside of client rect, so don't do anything + return 0; + } + } + + S16 incoming_h_delta = HIWORD(w_param); + h_delta += incoming_h_delta; + + // If the user rapidly spins the wheel, we can get messages with + // large deltas, like 480 or so. Thus we need to scroll more quickly. + if (h_delta <= -WHEEL_DELTA || WHEEL_DELTA <= h_delta) + { + window_imp->mCallbacks->handleScrollHWheel(window_imp, h_delta / WHEEL_DELTA); + h_delta = 0; + } + return 0; + } // Handle mouse movement within the window case WM_MOUSEMOVE: { |