Pie menus:

If user drags away from initial position, menu changes to drag style and
returning to that position won't remake the menu click-style. Allows to
use the threshold indicator to cancel the pie.

3 files changed, 10 insertions, 6 deletions

diff --git a/source/blender/editors/interface/interface_handlers.c b/source/blender/editors/interface/interface_handlers.c
index 765a27acf40..ac4da00833f 100644
--- a/source/blender/editors/interface/interface_handlers.c
+++ b/source/blender/editors/interface/interface_handlers.c
@@ -8704,13 +8704,16 @@ static int ui_handler_pie(bContext *C, const wmEvent *event, uiPopupBlockHandle
 		if (event->val != KM_RELEASE) {
 			ui_handle_menu_button(C, event, menu);
 
+			if (len_squared_v2v2(event_xy, block->pie_data.pie_center_init) > PIE_CLICK_THRESHOLD_SQ) {
+				block->pie_data.flags |= UI_PIE_DRAG_STYLE;
+			}
 			/* why redraw here? It's simple, we are getting many double click events here.
 			 * Those operate like mouse move events almost */
 			ED_region_tag_redraw(ar);
 		}
 		else {
 			/* distance from initial point */
-			if (len_squared_v2v2(event_xy, block->pie_data.pie_center_init) < PIE_CLICK_THRESHOLD_SQ) {
+			if (!(block->pie_data.flags & UI_PIE_DRAG_STYLE)) {
 				block->pie_data.flags |= UI_PIE_CLICK_STYLE;
 			}
 			else if (!is_click_style) {
@@ -8726,8 +8729,12 @@ static int ui_handler_pie(bContext *C, const wmEvent *event, uiPopupBlockHandle
 
 		switch (event->type) {
 			case MOUSEMOVE:
-				/* mouse move should always refresh the area for pie menus */
+				if (len_squared_v2v2(event_xy, block->pie_data.pie_center_init) > PIE_CLICK_THRESHOLD_SQ) {
+					block->pie_data.flags |= UI_PIE_DRAG_STYLE;
+				}
 				ui_handle_menu_button(C, event, menu);
+				
+				/* mouse move should always refresh the area for pie menus */
 				ED_region_tag_redraw(ar);
 				break;
 
diff --git a/source/blender/editors/interface/interface_intern.h b/source/blender/editors/interface/interface_intern.h
index 15cf14ae6ef..cdc611a60f4 100644
--- a/source/blender/editors/interface/interface_intern.h
+++ b/source/blender/editors/interface/interface_intern.h
@@ -166,7 +166,7 @@ extern const short ui_radial_dir_to_angle[8];
 enum {
 	UI_PIE_DEGREES_RANGE_LARGE  = (1 << 0),  /* pie menu item collision is detected at 90 degrees */
 	UI_PIE_INITIAL_DIRECTION    = (1 << 1),  /* use initial center of pie menu to calculate direction */
-	UI_PIE_3_ITEMS              = (1 << 2),  /* pie menu has only 3 items, careful when centering */
+	UI_PIE_DRAG_STYLE           = (1 << 2),  /* pie menu is drag style */
 	UI_PIE_INVALID_DIR          = (1 << 3),  /* mouse not far enough from center position  */
 	UI_PIE_FINISHED             = (1 << 4),  /* pie menu finished but we still wait for a release event  */
 	UI_PIE_CLICK_STYLE          = (1 << 5),  /* pie menu changed to click style, click to confirm  */
diff --git a/source/blender/editors/interface/interface_layout.c b/source/blender/editors/interface/interface_layout.c
index ac9110873ff..27af550b173 100644
--- a/source/blender/editors/interface/interface_layout.c
+++ b/source/blender/editors/interface/interface_layout.c
@@ -2171,9 +2171,6 @@ static void ui_litem_layout_radial(uiLayout *litem)
 	if (totitems < 5)
 		litem->root->block->pie_data.flags |= UI_PIE_DEGREES_RANGE_LARGE;
 
-	if (totitems == 3)
-		litem->root->block->pie_data.flags |= UI_PIE_3_ITEMS;
-
 	for (item = litem->items.first; item; item = item->next) {
 		/* not all button types are drawn in a radial menu, do filtering here */
 		if (ui_item_is_radial_displayable(item)) {