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-rw-r--r--src/file-manager/fm-directory-view.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/file-manager/fm-directory-view.c b/src/file-manager/fm-directory-view.c
index df7a2988..e5180dad 100644
--- a/src/file-manager/fm-directory-view.c
+++ b/src/file-manager/fm-directory-view.c
@@ -10890,6 +10890,11 @@ gboolean
fm_directory_view_handle_scroll_event (FMDirectoryView *directory_view,
GdkEventScroll *event)
{
+#if GTK_CHECK_VERSION (3, 0, 0)
+ static gdouble total_delta_y = 0;
+ gdouble delta_x, delta_y;
+#endif
+
if (event->state & GDK_CONTROL_MASK) {
switch (event->direction) {
case GDK_SCROLL_UP:
@@ -10902,6 +10907,29 @@ fm_directory_view_handle_scroll_event (FMDirectoryView *directory_view,
fm_directory_view_bump_zoom_level (directory_view, -1);
return TRUE;
+#if GTK_CHECK_VERSION (3, 0, 0)
+ case GDK_SCROLL_SMOOTH:
+ gdk_event_get_scroll_deltas ((const GdkEvent *) event,
+ &delta_x, &delta_y);
+
+ /* try to emulate a normal scrolling event by summing deltas */
+ total_delta_y += delta_y;
+
+ if (total_delta_y >= 1) {
+ total_delta_y = 0;
+ /* emulate scroll down */
+ fm_directory_view_bump_zoom_level (directory_view, -1);
+ return TRUE;
+ } else if (total_delta_y <= - 1) {
+ total_delta_y = 0;
+ /* emulate scroll up */
+ fm_directory_view_bump_zoom_level (directory_view, 1);
+ return TRUE;
+ } else {
+ /* eat event */
+ return TRUE;
+ }
+#endif
case GDK_SCROLL_LEFT:
case GDK_SCROLL_RIGHT:
break;