Add button layout for dialogs on Android

It used macOS layout before, but it differs from the actual layout in
Android/Material Design: affirmative actions are on the right side,
dismissive actions are directly to the left of the affirmative actions
and neutral actions are on the left side.

[ChangeLog][Platform-specific Changes][Android] Android dialogs now have
more appropriate button layout, with affirmative actions on the right.

Task-number: QTBUG-58060
Change-Id: I0755f80261410c64cf4f854b7f2a72e2d959db28
Reviewed-by: BogDan Vatra <bogdan@kdab.com>
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/gui/kernel/qplatformdialoghelper.h b/src/gui/kernel/qplatformdialoghelper.h
index ed88c19c84..f58dcf17f0 100644
--- a/src/gui/kernel/qplatformdialoghelper.h
+++ b/src/gui/kernel/qplatformdialoghelper.h
@@ -141,13 +141,14 @@ public:
     Q_ENUM(ButtonRole)
 
     enum ButtonLayout {
-        // keep this in sync with QDialogButtonBox::ButtonLayout and QMessageBox::ButtonLayout
+        // keep this in sync with QDialogButtonBox::ButtonLayout
         UnknownLayout = -1,
         WinLayout,
         MacLayout,
         KdeLayout,
         GnomeLayout,
-        MacModelessLayout
+        MacModelessLayout,
+        AndroidLayout
     };
 
     QPlatformDialogHelper();