diff options
| -rw-r--r-- | vncviewer/Viewport.cxx | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/vncviewer/Viewport.cxx b/vncviewer/Viewport.cxx index 5b5f5bba..1d90f066 100644 --- a/vncviewer/Viewport.cxx +++ b/vncviewer/Viewport.cxx @@ -215,10 +215,15 @@ int Viewport::handle(int event) buttonMask |= 4; if (event == FL_MOUSEWHEEL) { + wheelMask = 0; if (Fl::event_dy() < 0) - wheelMask = 8; - else - wheelMask = 16; + wheelMask |= 8; + if (Fl::event_dy() > 0) + wheelMask |= 16; + if (Fl::event_dx() < 0) + wheelMask |= 32; + if (Fl::event_dx() > 0) + wheelMask |= 64; // A quick press of the wheel "button", followed by a immediate // release below |