VR: the menu pointer leaves the stick's choice be; clicks beside a list step it

A choice the stick moved to (a map among the tiles) is no longer taken back
by the pointer resting on another, until the pointer moves well away; and a
click beside a list's slots or a value's box, along the way it steps (where
its arrows are drawn), steps it back or on.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

port/linux/src/vr.c

@@ -2139,6 +2139,10 @@ static struct
 	int valid;
 	float x, y;
 	float reported_x, reported_y;
+	/* (a stick moved the menu's choice: the pointer, not moved far from
+	here since, leaves it be) */
+	int stick_quiet;
+	float stick_x, stick_y;
 	int hand;
 	int trigger_down[HALO_XR_HAND_COUNT];
 	int clicks;
@@ -2233,9 +2237,31 @@ int halo_vr_menu_pointer(int *x, int *y, int *click_x, int *click_y, int *moved,
 		return 0;
 	*x = (int)menu_pointer.x;
 	*y = (int)menu_pointer.y;
+	/* (a stick pushed: what it chooses stays chosen until the pointer
+	moves well away) */
+	{
+		int index;
+
+		for (index = 0; index < HALO_XR_HAND_COUNT; index++)
+		{
+			const struct halo_xr_hand *hand = &vr.frame.hands[index];
+
+			if (hand->active && (fabsf(hand->thumbstick[0]) > 0.4f || fabsf(hand->thumbstick[1]) > 0.4f))
+			{
+				menu_pointer.stick_quiet = 1;
+				menu_pointer.stick_x = menu_pointer.x;
+				menu_pointer.stick_y = menu_pointer.y;
+			}
+		}
+		if (menu_pointer.stick_quiet && (fabsf(menu_pointer.x - menu_pointer.stick_x) > 25.0f ||
+			fabsf(menu_pointer.y - menu_pointer.stick_y) > 25.0f))
+		{
+			menu_pointer.stick_quiet = 0;
+		}
+	}
 	/* (moved past a hand's tremor: a few pixels) */
-	*moved = fabsf(menu_pointer.x - menu_pointer.reported_x) >= 3.0f ||
-		fabsf(menu_pointer.y - menu_pointer.reported_y) >= 3.0f;
+	*moved = !menu_pointer.stick_quiet && (fabsf(menu_pointer.x - menu_pointer.reported_x) >= 3.0f ||
+		fabsf(menu_pointer.y - menu_pointer.reported_y) >= 3.0f);
 	if (*moved)
 	{
 		menu_pointer.reported_x = menu_pointer.x;

source/interface/ui_widget.c

@@ -5751,6 +5751,57 @@ static void ui_mouse_list_directions(
 	return;
 }
 
+#ifdef HALO_ANDROID
+/* VR: a click beside a list's slots or a value's box, along the way it
+steps, where its arrows are drawn: a step back or on (TRUE: taken) */
+static boolean ui_mouse_click_beside_list(
+	short x,
+	short y)
+{
+	struct widget_instance *list = NULL;
+	rectangle2d bounds;
+	long index;
+	short back, forward;
+	boolean across;
+
+	for (index = 0; index < ui_mouse_target_count; index++)
+	{
+		struct ui_mouse_target const *target = &ui_mouse_targets[index];
+		struct widget_instance *owner = target->kind == _ui_mouse_target_list_slot ? target->widget->parent :
+			target->kind == _ui_mouse_target_value ? target->widget : NULL;
+
+		if (!owner)
+			continue;
+		if (!list)
+		{
+			list = owner;
+			bounds = target->bounds;
+		}
+		else if (owner == list)
+		{
+			bounds.x0 = MIN(bounds.x0, target->bounds.x0);
+			bounds.y0 = MIN(bounds.y0, target->bounds.y0);
+			bounds.x1 = MAX(bounds.x1, target->bounds.x1);
+			bounds.y1 = MAX(bounds.y1, target->bounds.y1);
+		}
+	}
+	if (!list)
+		return FALSE;
+	ui_mouse_list_directions(list, &back, &forward);
+	across = back == _widget_event_dpad_left;
+	if (across ? y < bounds.y0 - 24 || y >= bounds.y1 + 24 : x < bounds.x0 - 24 || x >= bounds.x1 + 24)
+		return FALSE;
+	ui_mouse_give_focus(list);
+	if (across ? x < bounds.x0 && x >= bounds.x0 - 80 : y < bounds.y0 && y >= bounds.y0 - 48)
+		ui_mouse_press(back);
+	else if (across ? x >= bounds.x1 && x < bounds.x1 + 80 : y >= bounds.y1 && y < bounds.y1 + 48)
+		ui_mouse_press(forward);
+	else
+		return FALSE;
+	return TRUE;
+}
+#endif
+
 /* steps a list that shows several items to the one shown in a slot, as
 pressing the d-pad that many times would */
 static void ui_mouse_step_list_to_slot(
@@ -6540,6 +6591,12 @@ static void ui_widgets_process_mouse(
 			{
 				long index;
 
+#ifdef HALO_ANDROID
+				/* (VR: beside a list, on its arrows) */
+				if (halo_vr_active() && ui_mouse_click_beside_list(ui_mouse_click_x, ui_mouse_click_y))
+					index = 0;
+				else
+#endif
 				/* a screen with nothing to pick (a message to dismiss): the
 				click is its A */
 				for (index = 0; index < ui_mouse_target_count; index++)