From 616dfbbea24601175a6b378ae1ec1c62a901e377 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Tue, 27 Dec 2022 13:04:39 -0500
Subject: Fail to set transient parent of views with a parent window

---
 src/mac.m | 4 ++++
 src/x11.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/src/mac.m b/src/mac.m
index 72b3e5f..186e612 100644
--- a/src/mac.m
+++ b/src/mac.m
@@ -1562,6 +1562,10 @@ puglSetSizeHint(PuglView* const    view,
 PuglStatus
 puglSetTransientParent(PuglView* view, PuglNativeView parent)
 {
+  if (view->parent) {
+    return PUGL_FAILURE;
+  }
+
   view->transientParent = parent;
 
   if (view->impl->window) {
diff --git a/src/x11.c b/src/x11.c
index fc0e2af..2ded392 100644
--- a/src/x11.c
+++ b/src/x11.c
@@ -1656,6 +1656,10 @@ puglSetTransientParent(PuglView* const view, const PuglNativeView parent)
 {
   Display* display = view->world->impl->display;
 
+  if (view->parent) {
+    return PUGL_FAILURE;
+  }
+
   view->transientParent = parent;
 
   if (view->impl->win) {
-- 
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