BWindow::IsFront() was implemented incorrectly - we actually need to query the

app_server for this; added a new AS_IS_FRONT_WINDOW command for this.
For example, clicking on the menu bar to bring windows to front in FFM mode
does work now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19725 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/Window.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2001-2006, Haiku.
+ * Copyright 2001-2007, Haiku.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -647,7 +647,17 @@ BWindow::EndViewTransaction()
 bool
 BWindow::IsFront() const
 {
-	return (IsActive() || IsModal());
+	BAutolock locker(const_cast<BWindow*>(this));
+	if (!locker.IsLocked())
+		return false;
+
+	fLink->StartMessage(AS_IS_FRONT_WINDOW);
+
+	status_t status;
+	if (fLink->FlushWithReply(status) == B_OK)
+		return status >= B_OK;
+
+	return false;
 }