From 73728814b00a1c4342d1053cc1c697831eff4364 Mon Sep 17 00:00:00 2001 From: Eduard Braun Date: Thu, 13 Sep 2018 16:17:51 +0200 Subject: [PATCH] GDK W32: fix direction of horizontal smooth scrolling events Commit 359df028be7b1dae76a1abb9bad8a3b86a648765 changed the code to send GDK_SCROLL_SMOOTH with deltas instead of GDK_SCROLL_(UP|DOWN|LEFT|RIGHT). Windows defines deltas inversed for vertical direction (positive values mean the wheel was turned forward) but not for horizontal direction (positive values mean the wheel was turned towards the right). This commit fixes behavior as both axes were inverted previously. --- gdk/win32/gdkevents-win32.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/gdk/win32/gdkevents-win32.c b/gdk/win32/gdkevents-win32.c index ad05ee6314..40df7de157 100644 --- a/gdk/win32/gdkevents-win32.c +++ b/gdk/win32/gdkevents-win32.c @@ -2736,10 +2736,9 @@ gdk_event_translate (MSG *msg, if (SystemParametersInfo (SPI_GETWHEELSCROLLCHARS, 0, &chars_multiplier, 0)) event->scroll.delta_x *= (gdouble) chars_multiplier; } - /* It seems that delta values given by Windows are - * inverted (positive delta scrolls up, not down). + /* Positive delta scrolls up, not down, + see API documentation for WM_MOUSEWHEEL message. */ - event->scroll.delta_x *= -1.0; event->scroll.delta_y *= -1.0; event->scroll.time = _gdk_win32_get_next_tick (msg->time); event->scroll.x = (gint16) point.x / impl->surface_scale;