lv_indev_get_key() added

lv_core/lv_indev.h

@@ -98,6 +98,13 @@ void lv_indev_set_button_points(lv_indev_t *indev, lv_point_t *points);
  */
 void lv_indev_get_point(const lv_indev_t * indev, lv_point_t * point);
 
+/**
+ * Get the last key of an input device (for LV_INDEV_TYPE_KEYPAD)
+ * @param indev pointer to an input device
+ * @return the last pressed key (0 on error)
+ */
+uint32_t lv_indev_get_key(const lv_indev_t * indev);
+
 /**
  * Check if there is dragging with an input device or not (for LV_INDEV_TYPE_POINTER and LV_INDEV_TYPE_BUTTON)
  * @param indev pointer to an input device