XEmacs 21.2.28 "Hermes".

[chise/xemacs-chise.git.1] / lwlib / xlwtabs.c

diff --git a/lwlib/xlwtabs.c b/lwlib/xlwtabs.c
index 5ef2acb..303d149 100644 (file)
--- a/lwlib/xlwtabs.c
+++ b/lwlib/xlwtabs.c
@@ -980,6 +980,12 @@ TabsChangeManaged(Widget w)
          tw->tabs.topWidget->core.being_destroyed ) )
       tw->tabs.topWidget = NULL ;
 
+    /* Check whether the highlight tab is still valid. */
+    if( tw->tabs.hilight != NULL &&
+        ( !XtIsManaged(tw->tabs.hilight) ||
+         tw->tabs.hilight->core.being_destroyed ) )
+      tw->tabs.hilight = NULL ;
+
     GetPreferredSizes(tw) ;
     MakeSizeRequest(tw) ;
 
@@ -1255,6 +1261,7 @@ XawTabsSetTop(Widget w, Bool callCallbacks)
        if( !XtIsRealized(w) ) {
          tw->tabs.topWidget = w ;
          tw->tabs.needs_layout = True ;
+         tw->tabs.hilight = NULL; /* The highlight tab might disappear. */
          return ;
        }
 
@@ -1265,6 +1272,14 @@ XawTabsSetTop(Widget w, Bool callCallbacks)
 #endif
 
        tab = (TabsConstraints) w->core.constraints ;
+
+       /* Unhighlight before we start messing with the stacking order. */
+       if( tw->tabs.hilight != NULL )
+         {
+           DrawHighlight(tw, tw->tabs.hilight, True) ;
+           tw->tabs.hilight = NULL;
+         }
+
        if( tab->tabs.row == 0 )
        {
          /* Easy case; undraw current top, undraw new top, assign new
@@ -1307,8 +1322,6 @@ XawTabsSetHighlight(Widget t, Widget w)
 
        if( XtIsRealized(t) && w != tw->tabs.hilight )
        {
-         if( tw->tabs.hilight != NULL )
-           DrawHighlight(tw, tw->tabs.hilight, True) ;
          if( w != NULL )
            DrawHighlight(tw, w, False) ;
        }