Class List

Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 1234]

NKexi	Namespace for general Kexi functions
CObjectStatus
CActionCategories	A set of functions used to declare action categories
NKexiCSVExport
COptions	Options used in KexiCSVExportWizard contructor
NKexiDB	High-level database connectivity library with database backend drivers
CAdminTools	An interface containing a set of tools for database administration
CAlterTableHandler	A tool for handling altering database table schema
CActionBase	Abstract base class used for implementing all the AlterTable actions
CDebugOptions	Controls debug options for actions. Used in debugString() and debug()
CFieldActionBase	Abstract base class used for implementing table field-related actions
CChangeFieldPropertyAction
CRemoveFieldAction	Defines an action for removing a single table field
CInsertFieldAction	Defines an action for inserting a single table field
CMoveFieldPositionAction
CExecutionArguments	Arguments for AlterTableHandler::execute()
CConnection	Provides database connection, allowing queries and data modification
CSelectStatementOptions	Options used in selectStatement()
CConnectionDataBase
CConnectionData	Database specific connection data, e.g. host, port
CCursor	Provides database cursor functionality
CObjectNameValidator
CDatabaseProperties	A set of storable database properties
CDriver	Generic database abstraction
CInfo
CDriverManager	Database driver management, e.g. finding and loading drivers
CMySqlConnection
CMySqlDriver	MySQL database driver
CMySqlPreparedStatement
CpqxxSqlConnection
CpqxxSqlDriver	PostgreSQL database driver
CpqxxPreparedStatement
CSQLiteConnection	Sqlite-specific connection
CSQLiteDriver	SQLite database driver
CSQLitePreparedStatement
CResultInfo
CBaseExpr	A base class for all expressions
CNArgExpr	A base class N-argument operation
CUnaryExpr	An unary argument operation: + - NOT (or !) ~ "IS NULL" "IS NOT NULL"
CBinaryExpr
CConstExpr
CQueryParameterExpr
CVariableExpr	Variables like fieldname or tablename.fieldname
CFunctionExpr
CField	Meta-data for a field
CFieldList
CFieldValidator	A validator for KexiDB data types
CDatabaseVersionInfo	Contains database version information about a Kexi-compatible database. The version is stored as internal database properties
CServerVersionInfo	Contains version information about a database backend
CIndexSchema	Provides information about database index that can be created for a database table
CLookupFieldSchema	Provides information about lookup field's setup
CRowSource	Row source information that can be specified for the lookup field schema
CMessageTitle
CMessageHandler
CObject
CParserError	Provides detailed i18n'ed error description about the Parser
CParser	Parser for SQL statements
CPreparedStatement	Prepared database command for optimizing sequences of multiple database actions
CQueryColumnInfo	Helper class that assigns additional information for the column in a query
COrderByColumn	KexiDB::OrderByColumn provides information about a single query column used for sorting
COrderByColumnList	KexiDB::OrderByColumnList provides list of sorted columns for a query schema
CQuerySchema	KexiDB::QuerySchema provides information about database query
CQueryAsterisk	KexiDB::QueryAsterisk class encapsulates information about single asterisk in query definition
CQuerySchemaParameter	A single parameter of a query schema
CQuerySchemaParameterValueListIterator	An iteratof for a list of values of query schema parameters providing Allows to iterate over parameters and return TQVariant value or well-formatted string. The iterator is initially set to the last item because of the parser requirements
CRecord
CRowEditBuffer	Data for single edited database row KexiDB::RowEditBuffer provides data for single edited row, needed to perform update at the database backend. Its advantage over pasing e.g. KexiDB::FieldList object is that EditBuffer contains only changed values
CSchemaData
CSimpleCommandLineApp	A skeleton for creating a simple command line database application
CTableSchema
CInternalTableSchema
CTransactionData
CTransaction	This class encapsulates transaction handle
CTransactionGuard	Helper class for using inside methods for given connection
CTableOrQuerySchema
NKexiMacro
CDataTableAction	Implements a KoMacro::Action to provide functionality to import or export a datatable
CExecuteAction	Implements a KoMacro::Action to provide functionality to execute an object like e.g
CKexiAction	Template class to offer common functionality needed by all KoMacro::Action implementations Kexi provides
CKexiVariable	Template class to offer common functionality needed by all KoMacro::Variable implementations Kexi provides
CMessageAction	The ExecuteObject class implements a KoMacro::Action to provide functionality to execute an object like e.g
CNavigateAction	Implements a KoMacro::Action to provide functionality to execute an object like e.g
CObjectNameVariable	The ViewVariable class provide a list of KexiPart::PartItem's supported by a KexiPart::Part as KoMacro::Variable
CObjectVariable	The ObjectVariable class implements KoMacro::Variable to provide a variable list of Kexi-objects
COpenAction	Implements a KoMacro::Action to provide functionality to open any kind of Kexi object (e.g
NKexiMigration	Framework for importing databases into native KexiDB databases
COptionsDialog	Import Options dialog. It is currently used for MDB driver only
CImportWizard	GUI for importing external databases (file-based and server-based)
CKexiMigrate	Imports non-native databases into Kexi projects
CMigrateManager	Migration library management, for finding and loading mogration drivers
CTxtMigrate
NKexiPart
CPart	The main class for kexi frontend parts like tables, queries, forms and reports
CDataSource	This class provides a datasource framework for e.g
CInfo	Information about a Kexi Part (plugin)
CItem	Information about a single object that can be instantiated using Kexi Part
CItemList	Part item list with reimplemented compareItems() method
CManager	KexiPart's manager: looks up and instantiates them
CStaticInfo	Information about a static Kexi Part (plugin)
CStaticPart	Static Kexi Part (plugin)
NKexiTableDesignerCommands
CCommand	Base class for all Table Designer's commands
CChangeFieldPropertyCommand	Undo/redo command used for when changing a property for a table field
CRemoveFieldCommand	Undo/redo command used when a field is removed from a table
CInsertFieldCommand	Undo/redo command used when a new field is inserted into a table
CChangePropertyVisibilityCommand	Undo/redo command used when property visibility is changed
CInsertEmptyRowCommand	Undo/redo command used when property visibility is changed
NKexiUtils	General Utils
CIdentifierValidator	Validates input for identifier name
CLongLongValidator	A validator for longlong data type
CStyleProxy	TQStyle proxy allowing to customizing the currently used style
CWaitCursor
CWaitCursorRemover
CValidator	A validator extending TQValidator with offline-checking for value's validity
CMultiValidator	A validator groupping multiple TQValidators
NKFormDesigner
CCommand	Base class for KFormDesigner's commands
CPropertyCommand
CGeometryPropertyCommand
CAlignWidgetsCommand
CAdjustSizeCommand
CLayoutPropertyCommand
CInsertWidgetCommand
CCreateLayoutCommand
CBreakLayoutCommand
CPasteWidgetCommand
CDeleteWidgetCommand
CCutWidgetCommand
CCommandGroup
CConnectionDialog
CEventEater	This class is used to filter the events from any widget (and all its subwidgets) and direct it to the Container
CContainer	This class makes a container out of any TQWidget
CDesignTimeDynamicChildWidgetHandler	Interface for adding dynamically created (at design time) widget to event eater
CEditListViewDialog	A dialog to edit the contents of a listvuew (TDEListView or TQListView)
CFormWidget	Base (virtual) class for all form widgets
CForm	A simple class representing a form
CFormIO	This class act as a namespace for all .ui files related functions, ie saving/loading .ui files
CFormManager	A class to manage (create/load/save) Forms
CLibActionWidget	TDEToggleAction subclass which remembers the matching class name
CObjectTreeItem	An item representing a widget Holds the properties of a widget (classname, name, parent, children ..)
CObjectTree	Represents all the objects available within a form. This class holds ObjectTreeItem for each widget in a Form
CObjectTreeViewItem	An item in ObjectTreeView associated with an ObjectTreeItem
CObjectTreeView	A graphical view of Form's ObjectTree. This is a TDEListView which represents an item for each widget in the form. The actually selected widget is written bold and selected. Clicking on a list item selects the corresponding widget in the Form
CResizeHandle	Single widget which represents a dot for resizing a widget
CResizeHandleSet	Set of resize handles (for resizing widgets)
CRichTextDialog	A simple dialog to edit rich text
CTabStopDialog	A dialog to edit Form tab stops
CTabWidget	A tab widget providing information about height of the tab bar
CHorWidgetList	A helper for sorting widgets horizontally
CVerWidgetList	A helper for sorting widgets vertically
CWidgetInfo	This class holds properties of widget classes provided by a factory
CWidgetFactory	The base class for all widget Factories
CWidgetLibrary	This class searches for factories and provides TDEActions for widget creation
CWidgetWithSubpropertiesInterface	An interface for declaring form widgets to have subproperties
NKoMacro
CAction	Extendes TDEAction to implement some additional functionality TDEAction doesn't provide
CContext	The context of an execution
CException	Base Exception class
CMacro	Implements all the action-handling
CMacroItem	Item in a Macro and represents one single execution step
CManager	Acts as window-wide manager for macros
CMetaMethod	Class to provide abstract methods for the undocumented TQt3 TQUObject-API functionality
CMetaObject	Class to provide abstract access to extended TQObject functionality like the undocumented TQUObject-API in TQt3
CMetaParameter	Class to provide abstract methods for the undocumented TQt3 TQUObject-API functionality
CVariable	A variable value used to provide abstract access to variables
CXMLHandler	Manages the (un-)serialization of a Macro instance to/from XML
NKross
NKexiApp	Wrapper around the Kexi-application to access runtime information a running Kexi-application likes to provide
CKexiAppMainWindow	Class to handle Kexi's mainwindow instance
CKexiAppModule	The Kexi-application module which provides us the main entrypoint to communicate with a running Kexi-application
CKexiAppPartItem	Class to handle Kexi Part::Item instance
NKexiDB	KrossKexiDB provides access to the KexiDB database functionality
CKexiDBConnection	A connection to a database
CKexiDBConnectionData	A KexiDBConnectionData is used to store the details needed for a connection with a database
CKexiDBCursor	The cursor provides a control structure for the successive traversal of records in a result set as returned e.g
CKexiDBDriver	Drivers are the implementations Kexi uses to access the driver-backends
CKexiDBDriverManager	The drivermanager is the base class to access KexiDBDriver objects and provides common functionality to deal with the KexiDB module
CKexiDBField	A field in a record
CKexiDBFieldList	A list of fields
CKexiDBParser	The KexiDBParser could be used to parse SQL-statements
CKexiDBSchema	The KexiDBSchema object provides common functionality for schemas like KexiDBTableSchema or KexiDBQuerySchema
CKexiDBTableSchema	The KexiDBTableSchema object implements a KexiDBSchema for tables
CKexiDBQuerySchema	The KexiDBTableSchema object implements a KexiDBSchema for queries
CKexiDBTransaction	Transactions are used to ensure that integrity of a database is maintained
CConnectionDataLVItem	Helper class
CContainerFactory	Standard Factory for all container widgets
CContainerWidget	A simple container widget
CCustomWidget	A blank widget displayed when class is not supported
CEvent	A simple class to store events
CForm	A simple class representing a form
CFormScript	A class that stores the code and events related to a single form
CFormWidgetBase	Helper: this widget is used to create form's surface
CGrid	Helper widget (used when using 'Lay out in a grid')
CGroupBox	A group box widget
CHBox	Helper widget (used when using 'Lay out horizontally')
CHFlow	Helper widget (used when using 'Lay out with horizontal flow')
CKDockSplitter	Like TQSplitter but specially designed for dockwidgets stuff
CKexiActionProxy	An interface that acts as proxy for shared actions within the application
CKexiActionSelectionDialog	A dialog for selecting an action to be executed for a form's command button
CKexiArrowTip	A tooltip-like widget with additional arrow
CKexiBLOBBuffer	Application-wide buffer for local BLOB data like pixmaps
CHandle	Object handle used by KexiBLOBBuffer
CKexiBoolTableEdit	Cell editor for boolean type
CKexiBrowser	The Main Kexi navigator widget
CKexiBrowserItem	List view item for the navigator widget (KexiBrowser) Used for creating group items as well as object items
CKexiCellEditorFactory	A singleton class providing access to cell editor factories
CKexiCellEditorFactoryItem	A base class for implementing cell editor factories
CKexiCharacterEncodingComboBox	Combobox widget providing a list of possible character encodings
CKexiComboBoxBase	A base class for handling data-aware combo boxes. This class is used by KexiComboBoxTableEdit and KexiDBComboBox
CKexiComboBoxDropDownButton	A drop-down button for combo box widgets
CKexiComboBoxPopup	Internal class for displaying popup table view
CKexiComboBoxTableEdit	Drop-down cell editor
CKexiConnSelectorWidget
CKexiContextMenuUtils	A set of helpers for updating popup menu titles
CKexiCSVDelimiterWidget	A combo box widget providing a list of possible delimiters Used by CSV import and export dialogs
CKexiCSVExportWizard	Kexi CSV export wizard Supports exporting to a file and to a clipboard
CKexiCSVImportDialog	Kexi CSV import dialog
CKexiCSVImportExportPart
CKexiCSVImportOptions	CSV Options
CKexiCSVImportOptionsDialog	CSV Options dialog
CKexiCSVInfoLabel	A helper widget showing a short text information with an icon. See ctor for details. Used by CSV import and export dialogs
CKexiCSVTextQuoteComboBox	A combo box widget providing a list of possible quote characters Used by CSV import and export dialogs
CKexiCustomPropertyFactory	Kexi-specific custom property factory for KoProperty library
CKexiDataAwareObjectInterface	The KexiDataAwareObjectInterface is an interface for record-based data object
CPositionOfValue	Used to mark recently found value
CKexiDataAwarePropertySet
CKexiDataAwareView	Provides a view displaying record-based data
CKexiDataAwareWidgetInfo	A widget info for data-aware widgets
CKexiDataItemChangesListener	An helper class used to react on KexiDataItemInterface objects' changes
CKexiDataItemInterface	An interface for declaring widgets to be data-aware
CKexiDataSourceComboBox	A combo box listing availabe data sources (tables and queries) with icons
CKexiDataSourcePage	A page within form designer's property tabbed pane, providing data source editor
CKexiDataTable	Provides a data-driven (record-based) tabular view
CKexiDataTableView	Database aware table widget
CKexiDateFormatter	Date formatter used by KexiDateTableEdit and KexiDateTimeTableEdit
CKexiDateTableEdit	Editor class for Date type. It is a replacement TQDateEdit due to usability problems: people are accustomed to use single-character cursor. Date format is retrieved from the KDE global settings. and input/output is performed using KLineEdit (from KexiInputTableEdit)
CKexiDateTimeTableEdit	Editor class for Date/Time type. It is a replacement TQDateTimeEdit due to usability problems: people are accustomed to use single-character cursor. Date and Time format is retrieved from the KDE global settings and input/output is performed using KLineEdit (from KexiInputTableEdit)
CKexiDBAutoField	Universal "Auto Field" widget for Kexi forms
CKexiDBCheckBox	A db-aware check box
CKexiDBComboBox	Combo box widget for Kexi forms
CKexiDBConnectionSet
CKexiDBConnShortcutFile
CKexiDBDateEdit	A db-aware date editor
CKexiDBDateTimeEdit	A db-aware datetime editor
CKexiDBDoubleSpinBox	A db-aware int spin box
CKexiDBDriverComboBox	Combo box widget for selecting a database driver
CKexiDBFactory	Kexi Factory (DB widgets + subform)
CKexiDBForm	A DB-aware form widget, acting as form's toplevel widget
CKexiDBImageBox	A data-aware, editable image box
CKexiDBIntSpinBox	A db-aware int spin box
CKexiDBLabel	An extended, data-aware, read-only text label
CKexiDBLineEdit	Line edit widget for Kexi forms
CKexiDBShortcutFile
CKexiDBSubForm	A form embedded as a widget inside other form
CKexiDBTextEdit	Multiline edit widget for Kexi forms
CKexiDBTextWidgetInterface	An interface providing common text editor's functionality
CKexiDBTimeEdit	A db-aware time editor
CKexiDBTitlePage	A helper widget used to displaying a line edit with a label and layout
CKexiDBWidgetContextMenuExtender	Used for extending editor widgets' context menu
CKexiDialogBase	Base class for child window of Kexi's main application window
CKexiDialogTempData	Privides temporary data shared between KexiDialogBase's views (KexiView's)
CKexiDisplayUtils	A set of utilities related to displaying common elements in Kexi, like e.g. (autonumber) sign
CDisplayParameters	Stores set of display parameters used in utility functions
CKexiDropDownButton	A button for drop-down "Image" menu
CKexiDSWelcome	This page is part of the KexiDataSourceWizard it is the greeting page per default, where people can choose whether they want to use the wizard or not
CKexiEditor	An text editor view that uses both KTextEditor and KTextEdit
CKexiFieldComboBox
CKexiFieldDrag	Drag object containing information about field(s)
CKexiFieldListView
CKexiFindDialog	A Kexi-specific "Find text" dialog
CKexiFlowLayout	Special "flow" layout
CKexiFormDataItemInterface	An interface for declaring form widgets to be data-aware
CKexiFormDataProvider	Data provider for Kexi Forms
CKexiFormEventHandler	Handles events defined within Kexi Forms
CKexiFormPart	Kexi Form Plugin
CKexiFormScrollView	KexiFormScrollView class provides a widget for displaying data in a form view
CKexiFormView	The KexiFormView lass provides a data-driven (record-based) form view
CKexiFrame	Frame widget for Kexi forms
CKexiGradientWidget	A simple widget that can use different types of gradients as the background
CKexiImageContextMenu	A context menu used for images within form and table views
CKexiInputTableEdit	General purpose cell editor using line edit widget
CKexiInternalPart	A prototype for Kexi Internal Parts (plugins) implementation
CKexiLookupColumnPage	A page within table designer's property pane, providing lookup column editor
CKexiMacroDesignView	The KexiScriptDesignView implements KexiMacroView to provide a GUI-Editor to edit a Macro
CKexiMacroError	An error dialog used to displayed more detailed informations about a KoMacro::Exception that got thrown within a KoMacro::Context during execution
CKexiMacroPart	Kexi Macro Plugin
CKexiMacroProperty	Implementation of a KoProperty::CustomProperty to have more control about the handling of our macro-properties
CKexiMacroPropertyFactory	Implementation of a KoProperty::CustomPropertyFactory to handle creation of KexiMacroProperty and KexiMacroPropertyWidget instances for our macro-properties
CKexiMacroPropertyWidget	Implementation of a KoProperty::Widget used to display and edit a KexiMacroProperty
CKexiMacroTextView	The KexiMacroTextView implements KexiMacroView to provide a simple texteditor to edit the XML document of a Macro
CKexiMacroView	The KexiMacroView implements KexiViewBase to provide a base KexiView instance for Macros
CKexiMainWindow	Kexi's main window interface This interface is implemented by KexiMainWindowImpl class
CKexiMainWindowImpl	Kexi's main window implementation
CKexiMigrationPart	Internal part for data/project migration wizard
CKexiObjectInfoLabel	Helper class displaying small icon with class name and object name
CKexiPrjTypeSelector	A simple widget with radio buttons with "show file/server-based projects" options
CKexiProject	A project's main controller
CKexiProjectConnectionData	This class aims to provide methods to store/load database settings especially for file based engines
CKexiProjectData	Kexi project core data member
CKexiProjectSelectorDialog
CKexiProjectSelectorWidget
CKexiProjectSet	Stores information about multiple kexi project-data items
CKexiPropertyEditorView	The container (acts as a dock window) for KexiPropertyEditor
CKexiPushButton	Push Button widget for Kexi forms
CKexiQueryDesignerGuiEditor	Design view of the Query Designer
CKexiQueryDesignerSQLEditor	Text editor for entering query statements
CKexiQueryDesignerSQLView	For editing Queries in text mode
CKexiQueryParameters	Utilities providing GUI for getting query parameters
CKexiQueryPart	Kexi Query Designer Plugin
CTempData	Temporary data kept in memory while switching between Query Dialog's views
CKexiRecordMarker	Record marker, usually displayed at the left side of a table view or a continuous form
CKexiRecordNavigator	KexiRecordNavigator class provides a record navigator
CActions	A set of GUI items usable for displaying related actions
CKexiRecordNavigatorHandler	KexiRecordNavigatorHandler interface handles requests generated by KexiRecordNavigator
CKexiRelationView	View for displaying relations between database tables
CKexiReportFactory	Kexi Factory (DB widgets + subform)
CKexiReportForm	The report top widget
CKexiReportPart	Kexi Report Plugin It just creates a KexiReportView. See there for most of code
CKexiReportView	The FormPart's view
CKexiScriptDesignView	KexiViewBase to manage script modules in the design-view
CKexiScriptEditor	The KexiEditor class embeds text editor for editing scripting code
CKexiScriptPart	Kexi Scripting Plugin
CKexiScrollView	The scrollview which includes KexiDBForm
CKexiSearchAndReplaceViewInterface	An interface used by Kexi views (KexiViewBase) supporting search/replace features
COptions	Specifies options for find and replace operations
CKexiSharedActionClient	The KexiSharedActionClient is an interface using application-wide (shared) actions
CKexiSharedActionConnector	Abstract helper class used to connect shared actions from outside of shared-action-aware object
CKexiSharedActionHost	Acts as application-wide host that offers shared actions
CKexiSimplePrintingCommand	A command for simple printing and print preview. This class is instantiated in KexiMainWindowImpl so there's:
CKexiSimplePrintingEngine	An engine painting data on pages using TQPainter. The engine allows for random access to any page
CKexiSimplePrintingPageSetup	A window for displaying settings for simple printing
CKexiSimplePrintingPart	Internal Kexi Simple Printing Plugin
CKexiSimplePrintingSettings	Settings data for simple printing engine
CKexiSimplePrintPreviewWindow	A window for displaying print preview for simple printing
CKexiSmallToolButton	A small tool button with icon and optional text
CKexiStartupData
CImport
CKexiStartupDialog
CKexiStartupDialogTemplatesPage
CKexiStartupFileDialog	Widget for opening/saving files supported by Kexi
CKexiStartupFileDialogBase
CKexiStartupHandler
CKexiSubReport	A form embedded as a widget inside other form
CKexiSubwidgetInterface	An interface allowing to define custom behaviour for subwidget of the KexiDBAutoField
CKexiTableDesignerInterface	Interface for main Table Designer's commands
CKexiTableDesignerView	Design view of the Table Designer
CKexiTableEdit	Abstract class for a cell editor. Handles cell painting and displaying the editor widget
CKexiTableView	KexiTableView class provides a widget for displaying data in a tabular view
CAppearance
CKexiTableViewColumn
CKexiTableViewData
CKexiTableViewHeader	A table view header with additional actions
CKexiTDEIconTableEdit	Cell editor for displaying kde icon (using icon name provided as string). Read only
CKexiTemplateInfo	A structure providing information about single kexi database template file
CKexiTemplateLoader	Handles retrieving information about templates
CKexiTextFormatter	Text formatter used to format TQVariant values to text for displaying and back to TQVariant
CKexiTextMessageHandler	A wrapper that redirects messages to a string variables instead of displaying them. See KexiTextMessageHandler constructor for details
CKexiTimeFormatter	Time formatter used by KexiTimeTableEdit and KexiDateTimeTableEdit Following time formats are allowed: HH:MM:SS (24h), HH:MM (24h), HH:MM AM/PM (12h) Separator MUST be ":"
CKexiTimeTableEdit	Editor class for Time type. It is a replacement TQTimeEdit due to usability problems: people are accustomed to use single-character cursor. Time format is retrieved from the KDE global settings and input/output is performed using KLineEdit (from KexiInputTableEdit)
CKexiToolTip	A tooltip that can display rich content
CKexiUserAction
CKexiUserActionMethod
CKexiViewBase	Base class for single view embeddable of in KexiDialogBase
CKFDTabWidget	A tab widget
CLabel	A simple label inside a report
CLoadIconDialog	A simple dialog to choose a KDE icon
CPicLabel	A simple picture label inside a report
CPixmapCollection	A class that store pixmaps (by path or by name for KDE icons)
CPixmapCollectionChooser	A dialog to choose an icon in a PixmapCollection
CPixmapCollectionEditor	A dialog to edit the contents of a PixmapCollection
CPixmapIconViewItem	A Special TDEIconViewItem that holds the name of its associated pixmap (to allow renaming)
CReportLine	A line
CScriptIO	A static class to deal with loading/saving events from/to XML
CSQLiteAdminTools	An interface containing a set of tools for SQLite database administration
CSQLiteVacuum	Helper class performing interactive compacting (VACUUM) of the SQLite database
CStdWidgetFactory	Factory for all basic widgets, including Spring (not containers)
CSubForm	A form embedded as a widget inside other form
CTDEListViewItemTemplate	TQListViewItem class with ability for storing additional data member
Ctristate	3-state logical type with three values: true, false and cancelled and convenient operators
CVBox	Helper widget (used when using 'Lay out vertically')
CVFlow	Helper widget (used when using 'Lay out with horizontal flow')