Remove usages of deprecated APIs of qtbase/widgets

- Replace the usages of deprecated APIs by corresponding
  alternatives in the library code and documentation.

- Build docs for deprecated APIs conditionally, based on deprecation
  version. Remove the docs of methods deprecated since 5.0.0, these
  methods are not compiled anymore.

- Modify the tests to make them build when deprecated APIs disabled:
    * Make the the parts of the tests testing the deprecated APIs to
      be compiled conditionally, only when the corresponding methods
      are enabled.
    * If the test-case tests only the deprecated API, but not the
      corresponding replacement, add tests for the replacement

Task-number: QTBUG-76491
Task-number: QTBUG-76540
Task-number: QTBUG-76541
Change-Id: I6aaf0a1369c479fb880369a38f2b8e1e86b46934
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/auto/widgets/kernel/qboxlayout/tst_qboxlayout.cpp b/tests/auto/widgets/kernel/qboxlayout/tst_qboxlayout.cpp
index 8dd9d7c428..00bde3cb25 100644
--- a/tests/auto/widgets/kernel/qboxlayout/tst_qboxlayout.cpp
+++ b/tests/auto/widgets/kernel/qboxlayout/tst_qboxlayout.cpp
@@ -194,7 +194,7 @@ void tst_QBoxLayout::setGeometry()
     setFrameless(&toplevel);
     QWidget w(&toplevel);
     QVBoxLayout *lay = new QVBoxLayout;
-    lay->setMargin(0);
+    lay->setContentsMargins(0, 0, 0, 0);
     lay->setSpacing(0);
     QHBoxLayout *lay2 = new QHBoxLayout;
     QDial *dial = new QDial;
@@ -271,7 +271,7 @@ void tst_QBoxLayout::widgetSurplus()
     QDialog window;
     QScopedPointer<MarginEatingStyle> marginEater(new MarginEatingStyle);
     QVBoxLayout *vbox = new QVBoxLayout(&window);
-    vbox->setMargin(0);
+    vbox->setContentsMargins(0, 0, 0, 0);
     vbox->setSpacing(0);
 
     QLabel *hiddenLabel = new QLabel(tr("Invisible label"));