Ensure 0,0 offset for embed windows

Signed-off-by: falkTX <falktx@falktx.com>

dgl/src/WidgetPrivateData.cpp

@@ -1,6 +1,6 @@
 /*
  * DISTRHO Plugin Framework (DPF)
- * Copyright (C) 2012-2022 Filipe Coelho <falktx@falktx.com>
+ * Copyright (C) 2012-2023 Filipe Coelho <falktx@falktx.com>
  *
  * Permission to use, copy, modify, and/or distribute this software for any purpose with
  * or without fee is hereby granted, provided that the above copyright notice and this

dgl/src/Window.cpp

@@ -208,6 +208,9 @@ void Window::setOffsetY(const int y)
 
 void Window::setOffset(const int x, const int y)
 {
+    // do not call this for embed windows!
+    DISTRHO_SAFE_ASSERT_RETURN(!pData->isEmbed,);
+
     if (pData->view != nullptr)
         puglSetPosition(pData->view, x, y);
 }

dgl/src/WindowPrivateData.cpp

@@ -86,6 +86,10 @@ static PuglView* puglNewViewWithParentWindow(PuglWorld* const world, const uintp
     if (PuglView* const view = puglNewView(world))
     {
         puglSetParentWindow(view, parentWindowHandle);
+
+        if (parentWindowHandle != 0)
+            puglSetPosition(view, 0, 0);
+
         return view;
     }
 
@@ -212,9 +216,6 @@ Window::PrivateData::PrivateData(Application& a, Window* const s,
 #endif
       modal()
 {
-    if (isEmbed)
-        puglSetParentWindow(view, parentWindowHandle);
-
     initPre(width != 0 ? width : DEFAULT_WIDTH, height != 0 ? height : DEFAULT_HEIGHT, resizable);
 }