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authorTao Bao <tbao@google.com>2018-04-20 18:24:58 +0200
committerTao Bao <tbao@google.com>2018-05-01 19:27:40 +0200
commit3aec6965bff19ae34ea036c5416c9106c1bd9340 (patch)
tree63fb249d5082614f66f410eaa97405ca504c9083 /ui.h
parentrecovery: Split main() into recovery_main.cpp. (diff)
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Diffstat (limited to 'ui.h')
-rw-r--r--ui.h24
1 files changed, 13 insertions, 11 deletions
diff --git a/ui.h b/ui.h
index 4c54d6915..636c2ff70 100644
--- a/ui.h
+++ b/ui.h
@@ -21,6 +21,7 @@
#include <pthread.h>
#include <time.h>
+#include <functional>
#include <string>
// Abstract class for controlling the user interface during recovery.
@@ -128,17 +129,18 @@ class RecoveryUI {
// --- menu display ---
- // Display some header text followed by a menu of items, which appears at the top of the screen
- // (in place of any scrolling ui_print() output, if necessary).
- virtual void StartMenu(const char* const* headers, const char* const* items,
- int initial_selection) = 0;
-
- // Sets the menu highlight to the given index, wrapping if necessary. Returns the actual item
- // selected.
- virtual int SelectMenu(int sel) = 0;
-
- // Ends menu mode, resetting the text overlay so that ui_print() statements will be displayed.
- virtual void EndMenu() = 0;
+ // Displays a menu with the given 'headers' and 'items'. The supplied 'key_handler' callback,
+ // which is typically bound to Device::HandleMenuKey(), should return the expected action for the
+ // given key code and menu visibility (e.g. to move the cursor or to select an item). Caller sets
+ // 'menu_only' to true to ensure only a menu item gets selected and returned. Otherwise if
+ // 'menu_only' is false, ShowMenu() will forward any non-negative value returned from the
+ // key_handler, which may be beyond the range of menu items. This could be used to trigger a
+ // device-specific action, even without that being listed in the menu. Caller needs to handle
+ // such a case accordingly (e.g. by calling Device::InvokeMenuItem() to process the action).
+ // Returns a non-negative value (the chosen item number or device-specific action code), or -1 if
+ // timed out waiting for input.
+ virtual int ShowMenu(const char* const* headers, const char* const* items, int initial_selection,
+ bool menu_only, const std::function<int(int, bool)>& key_handler) = 0;
protected:
void EnqueueKey(int key_code);