From ad809436378a78a38ea031de49ff6e964917d658 Mon Sep 17 00:00:00 2001
From: Noah Davis <noahadvs@gmail.com>
Date: Wed, 9 Feb 2022 10:29:33 -0500
Subject: [PATCH 031/147] QPA: add ButtonPressKeys ThemeHint

Platforms should allow more than just Qt::Key_Space and Qt::Key_Select
to press buttons. KDE Plasma developers want to be able to press buttons
with Return/Enter. GTK allows buttons to be pressed with Return/Enter,
so this should be considered the native behavior for GNOME as well.
Adding this ThemeHint allows customizing the keys that can press a
button via a QPlatformTheme subclass.

Change-Id: I73284e9b73590fbdd0b94a0cb4557e94b3722af9
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
(cherry picked from commit 97eeded5fc8c8ebb476ed4a10d8726dd4d46f181)
---
 src/gui/kernel/qplatformtheme.cpp | 4 ++++
 src/gui/kernel/qplatformtheme.h   | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/gui/kernel/qplatformtheme.cpp b/src/gui/kernel/qplatformtheme.cpp
index 71521c0339..2325873245 100644
--- a/src/gui/kernel/qplatformtheme.cpp
+++ b/src/gui/kernel/qplatformtheme.cpp
@@ -163,6 +163,8 @@ QT_BEGIN_NAMESPACE
 
     \value ShowShortcutsInContextMenus (bool) Whether to display shortcut key sequences in context menus.
 
+    \value ButtonPressKeys (QList<Qt::Key>) A list of keys that can be used to press buttons via keyboard input.
+
     \sa themeHint(), QStyle::pixelMetric()
 */
 
@@ -563,6 +565,8 @@ QVariant QPlatformTheme::defaultThemeHint(ThemeHint hint)
         }
     case MouseQuickSelectionThreshold:
         return QVariant(10);
+    case ButtonPressKeys:
+        return QVariant::fromValue(QList<Qt::Key>({ Qt::Key_Space, Qt::Key_Select }));
     }
     return QVariant();
 }
diff --git a/src/gui/kernel/qplatformtheme.h b/src/gui/kernel/qplatformtheme.h
index 3185fc4541..7e6c9d5740 100644
--- a/src/gui/kernel/qplatformtheme.h
+++ b/src/gui/kernel/qplatformtheme.h
@@ -120,7 +120,8 @@ public:
         TouchDoubleTapDistance,
         ShowShortcutsInContextMenus,
         IconFallbackSearchPaths,
-        MouseQuickSelectionThreshold
+        MouseQuickSelectionThreshold,
+        ButtonPressKeys
     };
 
     enum DialogType {
-- 
2.40.1