X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c82be69b51b8f8aabb5bd667b063dba399c6d894..0ec6ec3266bc89920a46e50a14a448fbe9f9204a:/src/os2/window.cpp

diff --git a/src/os2/window.cpp b/src/os2/window.cpp
index e104adeddf..08b942a312 100644
--- a/src/os2/window.cpp
+++ b/src/os2/window.cpp
@@ -1472,6 +1472,16 @@ void wxWindowOS2::DoMoveWindow(
     RECTL                           vRect;
     wxWindow*                       pParent = GetParent();
 
+    /* Due to OS/2's inverted coordinate system, changing the height
+       of a window requires repositioning all it's children, e.g. if
+       you want a child of height 100 to be at the top left corner of
+       the parent you need to position the lower left corner of the
+       child at (0, (height of parent - 100)), so, obviously, if the
+       height of the parent changes, the child needs to be repositioned. */
+    int                         nHeightDelta;
+    GetSize(0, &nHeightDelta);
+    nHeightDelta = nHeight - nHeightDelta;
+
     if (pParent && !IsKindOf(CLASSINFO(wxDialog)))
     {
         int                         nOS2Height = GetOS2ParentHeight(pParent);
@@ -1620,6 +1630,7 @@ void wxWindowOS2::DoMoveWindow(
         MoveChildren(nYDiff);
         ::WinQueryWindowPos(GetHwnd(), &m_vWinSwp);
     }
+    MoveChildren(nHeightDelta);
 } // end of wxWindowOS2::DoMoveWindow
 
 //