Import of the watch repository from Pebble

src/fw/drivers/button_id.h

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+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+//! @addtogroup UI
+//! @{
+//!   @addtogroup Clicks
+//!   \brief Dealing with button input
+//!   @{
+
+//! Button ID values
+//! @see \ref click_recognizer_get_button_id()
+typedef enum {
+  //! Back button
+  BUTTON_ID_BACK = 0,
+  //! Up button
+  BUTTON_ID_UP,
+  //! Select (middle) button
+  BUTTON_ID_SELECT,
+  //! Down button
+  BUTTON_ID_DOWN,
+  //! Total number of buttons
+  NUM_BUTTONS
+} ButtonId;
+
+//!   @} // end addtogroup Clicks
+//! @} // end addtogroup UI