--------------------------------------------------------------------------- Is valid block ---------------------------------------------------------

--------------------------------------------------------------------------- SEL signal event polling -----------------------------------------------

Cached wrapper method to improve performance, e.g. on index screen

Attaches an observer to an obserable object

Helper method to attach/insert an image on a scsi id given through the menu context

Method blanks the screen. Based on drawing a blank rectangle.

Determines if the browser supports the HTML/CSS/JS features used in non-legacy themes.

Checks whether a PiSCSI connection exists by polling the PiSCSI server info. Returns true if connection works, false if connection fails.

Checks whether the rotary state has changed.

Resets pin and interrupt settings on the pins.

Method creates the action submenu with action that can be performed on a scsi slot

Create a menu displaying information of an image in a scsi slot

Creates a sub menu showing all the available images

Creates a sub menu showing all the available profiles

Create a menu displaying system commands

Create a menu displaying system information

Helper method to detach/eject an image on a scsi id given through the menu context

Detects whether an i2c display is connected to the PiSCSI hat.

Detects whether the PiSCSI Control Board is attached by checking whether the expected i2c addresses are detected.

Methods clears the screen. Possible hardware clear call if necessary.

Method initializes the displays for usage.

Takes (str) url and one or more (str) *iso_args Returns (dict) with (bool) status and (str) msg

Draws the screen saver in a non-blocking way if enabled.

Draws row frame_start_row to frame_end_row of the class instance menu, i.e., it draws a given frame of the complete menu that fits the screen.

Draws a fullscreen message, i.e., a message covering only the center portion of the screen. The remaining areas stay visible.

Draws the screen saver. Must be implemented in subclasses.

Takes (str) file_path, (list) members, optional (bool) move_properties_files_to_config file_name is the path of the archive file to e

Initializes a FAT file system Takes (str) file_name, (str) volume_name and (str) FAT size (12|16|32) as arguments. Returns (d

Initializes an HFS file system and injects a hard disk driver Takes (str) file_name, (str) volume_name and (Path) driver_path as argu

Takes: - (list) of (dict) image_files - (str) rootdir, the name of the images root dir - optional (list) device_types Returns a f

Formats the Protobuf command for output

Returns the menu renderer configuration.

Returns a dict with: - cpu_percent: (int) CPU usage percentage - mem_total: (int) Total memory in kilobytes - mem_ava

Takes (str) file_path path to image file to inspect. Returns either the disktype output, or the stderr output.

Takes a three char file suffix (str) file_suffix. Returns the help text description for said file suffix.

Sends a DEFAULT_IMAGE_FILES_INFO command to the server. Returns a dict with: - (bool) status - (str) images_dir, path

Takes (int) lines and (str) scope. If scope is a None equivalent, all syslogs are returned. Returns either the decoded log ou

Takes (str) file_path path to image file to generate manpage for. Returns either the man2html output, or the stderr output.

Returns the controller internal menu collection

Sends a NETWORK_INTERFACES_INFO command to the server. Returns a dict with: - (bool) status - (list) of (str) ifs (ne

Returns a list of languages supported by the web UI

Takes (list) enabled_modes & (list) test_modes parameters & returns a tuple of (str) category & (str) message. enabled_modes

Takes a list of (dict)s devices, and list of (int)s reserved_ids. Returns: - (list) of (int)s valid_ids, which are the SCSI ids that are

Method for handling the first cycle button (cycle profiles)

Method for handling the second cycle button (cycle shutdown)

Takes (str) interface of a network device being attached. Returns a (dict) with (bool) status and (str) msg

Returns (bool) True if the piscsi_bridge network interface exists

Main function for the PiSCSI Control Board UI

Takes a (dict) corresponding to the data structure returned by PiscsiCmds.get_device_types() Returns a (dict) of device_type:device_name mapp

Takes a (list) of (str) file suffixes for images file types. Returns a (dict) with file suffix and description pairs, both (str)

Parses the command line parameters and configured the PiSCSI Control Board UI accordingly

Signature for an abstract transition. Must be implemented in subclasses.

Implements a push left transition. Is called by perform depending on the transition attribute 'direction'.

Implements a push right transition. Is called by perform depending on the transition attribute 'direction'.

Perform the return action, i.e., when no selection is chosen

Returns a list of entries to cycle

Non-blocking event processor for hardware events (button presses etc.)

Reads the input port register and returns the logic level of one specific port in the argument

Method for handling the rotary button press for the menu navigation

Run a command in the background

Takes (str) cmd with the shell command to execute Executes shell command and captures output Returns (dict) with (int) return