core/popupanchor: emit anchoring() before checking anchor props

src/core/popupanchor.cpp

@@ -147,12 +147,12 @@ void PopupPositioner::reposition(PopupAnchor* anchor, QWindow* window, bool only
 	auto parentGeometry = parentWindow->geometry();
 	auto windowGeometry = window->geometry();
 
+	emit anchor->anchoring();
 	anchor->updatePlacement(parentGeometry.topLeft(), windowGeometry.size());
+
 	if (onlyIfDirty && !anchor->isDirty()) return;
 	anchor->markClean();
 
-	emit anchor->anchoring();
-
 	auto adjustment = anchor->adjustment();
 	auto screenGeometry = parentWindow->screen()->geometry();
 	auto anchorRectGeometry = anchor->rect().qrect().translated(parentGeometry.topLeft());

src/wayland/popupanchor.cpp

@@ -21,6 +21,8 @@ void WaylandPopupPositioner::reposition(PopupAnchor* anchor, QWindow* window, bo
 	auto* waylandWindow = dynamic_cast<QWaylandWindow*>(window->handle());
 	auto* popupRole = waylandWindow ? waylandWindow->surfaceRole<::xdg_popup>() : nullptr;
 
+	emit anchor->anchoring();
+
 	// If a popup becomes invisble after creation ensure the _q properties will
 	// be set and not ignored because the rest is the same.
 	anchor->updatePlacement({popupRole != nullptr, 0}, {});
@@ -42,8 +44,6 @@ void WaylandPopupPositioner::reposition(PopupAnchor* anchor, QWindow* window, bo
 
 		positioner.set_constraint_adjustment(anchor->adjustment().toInt());
 
-		emit anchor->anchoring();
-
 		auto anchorRect = anchor->rect();
 
 		if (auto* p = window->transientParent()) {