This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 123]

CAppSettings	Plain value-object holding all flat QtPass configuration
CBase32	RFC 4648 base32 codec, used for TOTP shared secrets
CExecutor::ExecQueueItem	Execution queue item for non-interactive ordered execution
CFileContent	Represents the parsed contents of a password file
CGrepSearchController::FinishOutcome	Outcome of a search-completion transition
CGpgIdGeneration	Rollback detection for signed .gpg-id files
CGpgIdSigner	The detached signature on a store's .gpg-id: whether the configured signing key is usable, signing the file, and checking that an existing .gpg-id.sig was made by one of the configured keys
CGrepSearchController	State machine for MainWindow's content-search (grep) mode
CGpgIdGeneration::Header	What a list's header says
CRealPass::InsertRecord
CRnpCrypto::KeyInfo	One primary key in the keyring, as the Users dialog lists keys
CRealPass::LinkCommit
CNamedValue	A name/value pair parsed from a password file field
CPassBackendFactory	Owns the Pass backend lifecycle (RealPass vs ImitatePass)
CPasswordConfiguration	Holds the password generator settings: which character set is selected, the alphabet of every set, and the password length
CPathValidator	Password-store path-boundary checks
CImitatePass::PendingInsert
CEnums::ProcessInfo	What QtPass knows about one kind of subprocess: what to call it and whether its output may carry a secret
CProfile	One named password store: where it is, how its .gpg-id is signed and, optionally, its own Git switches
CConfigDialog::ProfileEntry	One row of the profile list while the dialog is open. A QList rather than the Profiles map so a profile can pass through an empty or duplicate name while it is being typed; getProfiles() builds the map
CProfileInit	Turn a directory into a password store without going through the Pass backend of the currently active store
CConfigDialog::ProfileProblems	What is wrong with one profile's fields; empty strings where nothing is
CQApplication
CSingleApplication	QApplication subclass enforcing single-instance behavior via IPC
CQDialog
CConfigDialog	The ConfigDialog handles the configuration interface
CExportPublicKeyDialog	Dialog showing an ASCII-armored public GPG key for sharing
CImportKeyDialog	Dialog for importing GPG keys from file or clipboard
CKeygenDialog	Handles GPG keypair generation
CPasswordDialog	Dialog for creating a password entry or editing an existing one
CUsersDialog	Dialog for selecting GPG recipients for password encryption
CQDockWidget
CProcessOutputPanel	The dockable "Process output" console: numbered, colour-coded lines of git/pass/gpg output with a line cap and sticky auto-scroll
CQLabel
CFieldLabel	The name of a key: value field in PasswordDialog, editable in place: double-click or the context menu renames it, the context menu can also remove the field (#132)
CQLineEdit
CSecretLineEdit	A QLineEdit for a password that can be shown: whatever is copied out of it is marked as a secret and reported for autoclear
CQList
CNamedValues	Mostly a list of NamedValue but also has a method to take a specific NamedValue pair out of the list
CQMainWindow
CMainWindow	Main application window orchestrating UI, user interactions, and external process handlers
CQObject
CClipboardManager	Puts secrets on the system clipboard and takes them off again
CExecutor	Runs non-interactive external commands in FIFO order using a single QProcess
CMenuBarPeek	Shows a hidden menu bar while Alt is used, as browsers and file managers do
CNativeGrep	Full-text search over a password store without pass grep: every .gpg file is decrypted with gpg on a worker thread and its lines matched against a QRegularExpression. Only the newest search may report; a search started while another runs asks that one to stop and supersedes it
CPass	Abstract base class for password store operations
CImitatePass	Implementation that imitates 'pass' when the real tool is unavailable
CRealPass	Implementation of Pass that wraps the 'pass' command-line tool
CPasswordDisplayPanel	Renders decrypted password-file fields into MainWindow's grid
CQtPass	Application-level glue between the pass backends and whatever shows their results: turns the backends' completion signals into UI-neutral signals (formatted output, status messages, "the operation is over"), owns the ClipboardManager, migrates the settings of older versions on start-up and renders QR codes. It knows nothing about the main window; the window connects to the signals below
CStoreTree	The password store as shown in the tree: the QFileSystemModel, the StoreModel proxy on top of it and the QTreeView they drive, with the path questions the main window keeps asking
CTrayIcon	Handles the system tray icon and menu
CQPlainTextEdit
CSecretPlainTextEdit	A QPlainTextEdit for decrypted entry text being edited: whatever is copied or cut out of it is marked as a secret and reported for autoclear
CQPushButton
CQPushButtonAsQRCode	QPushButton that presents a text payload as a QR code action
CQPushButtonShowPassword	QPushButton that toggles visibility of an associated QLineEdit
CQPushButtonWithClipboard	QPushButton that stores a text payload and emits it when activated
CQSettings
CQtPassSettings	Singleton that stores QtPass settings, handles persistence and defaults
CQSortFilterProxyModel
CStoreModel	QSortFilterProxyModel for filtering and displaying password store
CQTextBrowser
CSecretTextBrowser	A QTextBrowser for decrypted entry text: whatever is copied out of it is marked as a secret and reported for autoclear
CQTreeView
CDeselectableTreeView	A QTreeView that clears its selection, and emits emptyClicked(), when the user clicks empty space or an already-selected item
CQWidget
COtpCodeWidget	Live one-time password display: code, copy button and countdown
CQWizard
CFirstRunWizard	The first start of QtPass: find GnuPG (and pass and Git), make sure there is a secret key, pick or create the password store. Replaces the chain of message boxes ConfigDialog::wizard() used to run before showing the whole configuration dialog
CQWizardPage
CDoneWizardPage	Last page: a summary of what Finish will do and the two preferences worth asking on day one
CKeyWizardPage	The secret keys gpg knows; a new pair can be generated here. The enabled ones become the recipients of a store that still has to be initialised
CProgramsWizardPage	Where gpg, pass and git are; gpg is required, the rest optional. A stored path that no longer runs is replaced by what PATH has
CStoreWizardPage	The folder the passwords live in: an existing store is used as-is, a folder without .gpg-id (or no folder) is initialised on Finish. The Git box lives here because its sensible default depends on the folder: on for a repository or a store still to be created, off for an existing store that is no repository
CPass::RecipientsForEditing	What a dialog may do with the list of a folder (recipientsForEditing())
CImitatePass::ReencryptResult	Outcome of one reencryptPath() run; filled on the worker thread and consumed by finishReencrypt() on the owning thread
CResolvedGpgconfCommand	Represents a command invocation for gpgconf operations
CRnpCrypto	OpenPGP encryption and decryption in-process, through RNP
CTotp::Settings	Validated TOTP parameters. Only Totp::parse() produces one
CSettingsSerializer	Maps AppSettings to and from a QSettings store
CConfigDialog::SigningStores
CSimpleTransaction	Tracks a sequence of processes that should be treated as one atomic operation
CSshAuthSock	SSH_AUTH_SOCK discovery and validation for child processes
CStoreDragItem	What a drag from the store tree carries: the kind of the dragged item and its path
CTemplateIO	Read and write password-store template configuration
CTotp	RFC 6238 time-based one-time password generation
CImitatePass::TransactionHelper	RAII helper for wrapping operations in transactions
CImitatePass::UncommittedGpgId	A .gpg-id Init() wrote but could not commit
CUserInfo	Stores GPG key info including validity, creation date, and more
CUtil	Static helpers that have no better home: setting up the process and the Git environment the way pass does, finding binaries and the default store, path and URL handling, and file operations that refuse to follow links
CNativeGrep::Worker
CExecutor::WslCommand	A configured executable that runs a Linux program through WSL