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/qlayout/tst_qlayout.cpp b/tests/auto/widgets/kernel/qlayout/tst_qlayout.cpp
index 936f581d89..140a367afe 100644
--- a/tests/auto/widgets/kernel/qlayout/tst_qlayout.cpp
+++ b/tests/auto/widgets/kernel/qlayout/tst_qlayout.cpp
@@ -308,7 +308,7 @@ void tst_QLayout::controlTypes2()
 {
     QWidget main;
     QVBoxLayout *const layout = new QVBoxLayout(&main);
-    layout->setMargin(0);
+    layout->setContentsMargins(0, 0, 0, 0);
     QComboBox *combo = new QComboBox(&main);
     layout->addWidget(combo);
     QCOMPARE(layout->controlTypes(), QSizePolicy::ComboBox);
@@ -319,7 +319,7 @@ void tst_QLayout::adjustSizeShouldMakeSureLayoutIsActivated()
     QWidget main;
 
     QVBoxLayout *const layout = new QVBoxLayout(&main);
-    layout->setMargin(0);
+    layout->setContentsMargins(0, 0, 0, 0);
     SizeHinterFrame *frame = new SizeHinterFrame(QSize(200, 10), QSize(200, 8));
     frame->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
     layout->addWidget(frame);