Fix T45944: Ctrl+Wheel to cycle values failes in toolshelf

Now, ctrl+wheel for cycling tabs is passed to hovered button if it supports cycling values (RNA menus, color/row/number/slider buttons, list boxes)

This might feel a bit glitchy if ctrl+wheel is used to cycle tabs and in newly opened tab, a button with cycling support is under the mouse, which will get mouse input from this point on instead of region. Think this is still better than old behavior.

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index dcf114383f9..a39990ea060 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -1805,6 +1805,16 @@ bool ui_but_is_rna_valid(uiBut *but)
 	}
 }
 
+/**
+ * Checks if the button supports ctrl+mousewheel cycling
+ */
+bool ui_but_supports_cycling(const uiBut *but)
+{
+	return ((ELEM(but->type, UI_BTYPE_ROW, UI_BTYPE_NUM, UI_BTYPE_NUM_SLIDER, UI_BTYPE_LISTBOX)) ||
+	        (but->type == UI_BTYPE_MENU && ui_but_menu_step_poll(but)) ||
+	        (but->type == UI_BTYPE_COLOR && but->a1 != -1));
+}
+
 double ui_but_value_get(uiBut *but)
 {
 	PropertyRNA *prop;