[Qemu-devel] [PATCH v2] ui/gtk: Fix mouse wheel on 3.4.0 or later

[OGAWA Hirofumi]

On 3.4.0 or later, send GDK_SCROLL_SMOOTH event, instead of
GDK_SCROLL_UP/DOWN.

This fixes it by converting any smooth scroll to up/down.
(I.e. without smooth support)

Signed-off-by: OGAWA Hirofumi <address@hidden>
---

 ui/gtk.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff -puN ui/gtk.c~mouse-wheel-fix ui/gtk.c
--- qemu/ui/gtk.c~mouse-wheel-fix       2016-12-28 04:52:07.848682967 +0900
+++ qemu-hirofumi/ui/gtk.c      2017-01-05 05:38:24.200601498 +0900
@@ -1015,6 +1015,19 @@ static gboolean gd_scroll_event(GtkWidge
         btn = INPUT_BUTTON_WHEEL_UP;
     } else if (scroll->direction == GDK_SCROLL_DOWN) {
         btn = INPUT_BUTTON_WHEEL_DOWN;
+#if GTK_CHECK_VERSION(3, 4, 0)
+    } else if (scroll->direction == GDK_SCROLL_SMOOTH) {
+        gdouble delta_x, delta_y;
+        if (!gdk_event_get_scroll_deltas((GdkEvent *)scroll,
+                                         &delta_x, &delta_y)) {
+            return TRUE;
+        }
+        if (delta_y > 0) {
+            btn = INPUT_BUTTON_WHEEL_DOWN;
+        } else {
+            btn = INPUT_BUTTON_WHEEL_UP;
+        }
+#endif
     } else {
         return TRUE;
     }
_

-- 
OGAWA Hirofumi <address@hidden>