input: map INPUT_BUTTON_WHEEL_{UP,DOWN} to legacy input z axis moves.

Unbreaks mouse wheel.

Reported-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

ui/input-legacy.c

@@ -359,6 +359,20 @@ static void legacy_mouse_event(DeviceState *dev, QemuConsole *src,
         } else {
             s->buttons &= ~bmap[evt->btn->button];
         }
+        if (evt->btn->down && evt->btn->button == INPUT_BUTTON_WHEEL_UP) {
+            s->qemu_put_mouse_event(s->qemu_put_mouse_event_opaque,
+                                    s->axis[INPUT_AXIS_X],
+                                    s->axis[INPUT_AXIS_Y],
+                                    -1,
+                                    s->buttons);
+        }
+        if (evt->btn->down && evt->btn->button == INPUT_BUTTON_WHEEL_DOWN) {
+            s->qemu_put_mouse_event(s->qemu_put_mouse_event_opaque,
+                                    s->axis[INPUT_AXIS_X],
+                                    s->axis[INPUT_AXIS_Y],
+                                    1,
+                                    s->buttons);
+        }
         break;
     case INPUT_EVENT_KIND_ABS:
         s->axis[evt->abs->axis] = evt->abs->value;

ui/sdl.c

@@ -455,13 +455,17 @@ static void sdl_send_mouse_event(int dx, int dy, int x, int y, int state)
                              real_screen->w);
         qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, y,
                              real_screen->h);
-    } else if (guest_cursor) {
+    } else {
-        x -= guest_x;
+        if (guest_cursor) {
-        y -= guest_y;
+            x -= guest_x;
-        guest_x += x;
+            y -= guest_y;
-        guest_y += y;
+            guest_x += x;
-        qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, x);
+            guest_y += y;
-        qemu_input_queue_rel(dcl->con, INPUT_AXIS_Y, y);
+            dx = x;
+            dy = y;
+        }
+        qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, dx);
+        qemu_input_queue_rel(dcl->con, INPUT_AXIS_Y, dy);
     }
     qemu_input_event_sync();
 }