Make QMessageBox window with the detailed text closable

QMessageBox window ignores QCloseEvent if it was created
with Ok button and the detailed text was set. But it can
be closed if it contains only one button.

Make it closable if there are two buttons and one of them
is the "Show Details..." button.

[ChangeLog][QtWidgets][QMessageBox] A message box with two
buttons, one of which is the "Show Details..." button,
can be closed by clicking the X button on the window's
title bar.

Task-number: QTBUG-69526
Change-Id: Iba09e38561eb3898dc2aecfd38d8519d512a71c1
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/auto/widgets/dialogs/qmessagebox/tst_qmessagebox.cpp b/tests/auto/widgets/dialogs/qmessagebox/tst_qmessagebox.cpp
index a5058f4b6c..70f5c40bcc 100644
--- a/tests/auto/widgets/dialogs/qmessagebox/tst_qmessagebox.cpp
+++ b/tests/auto/widgets/dialogs/qmessagebox/tst_qmessagebox.cpp
@@ -329,6 +329,12 @@ void tst_QMessageBox::escapeButton()
     closeHelper.start(ExecCloseHelper::CloseWindow, &msgBox2);
     msgBox2.exec();
     QVERIFY(msgBox2.clickedButton() == msgBox2.button(QMessageBox::No)); // auto detected (one No button only)
+
+    QMessageBox msgBox3;
+    msgBox3.setDetailedText("Details");
+    closeHelper.start(ExecCloseHelper::CloseWindow, &msgBox3);
+    msgBox3.exec();
+    QVERIFY(msgBox3.clickedButton() == msgBox3.button(QMessageBox::Ok)); // auto detected
 }
 
 void tst_QMessageBox::statics()