expo: Implement the keypress logic for popup menus
In 'popup' mode, the expo allows moving around the objects in a scene.
When 'enter' is pressed on a menu, it opens and the user can move around
the items in the menu.
Implement this using keypress handles and actions.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/doc/develop/expo.rst b/doc/develop/expo.rst
index 2f48828..80e435c 100644
--- a/doc/develop/expo.rst
+++ b/doc/develop/expo.rst
@@ -178,8 +178,7 @@
- Image formats other than BMP
- Use of ANSI sequences to control a serial terminal
- Colour selection
-- Better support for handling lots of settings, e.g. with multiple menus and
- radio/option widgets
+- Better support for handling lots of settings, e.g. with radio/option widgets
- Mouse support
- Integrate Nuklear, NxWidgets or some other library for a richer UI
- Optimise rendering by only updating the display with changes since last render