TPersistent class
Base class for streaming system and persistent properties.
Declaration
TPersistent = class(TObject)Inheritance
- TPersistent
- TObject
Descends from it: TAnchorSide TBaseMap TClipboard TCollection TCollectionItem TComponent TConnectionDef TControlBorderSpacing TControlChildSizing TControlScrollBar TCORSSupport TCSVHandler TCustomDefaults TDataLink TDockManager TFPCustomTemplate TFPVersion TGraphic TGraphicsObject TGridColumnTitle THelpBasePathObject THelpBaseURLObject THelpDBItem THelpNode THelpQuery TIconOptions TInterfacedPersistent TIODescriptor TItemProp TListItem TListItems TPicture TPropertyStorageLink TProxyData TSizeConstraints TSQLSequence TStrings TTaskDialogProgressBar TTreeNode TTreeNodes TWinBindings TWindowMagnetOptions
Description
TPersistent is the basic class for the streaming system. Since it
is compiled in the
{$M+} state, the compiler generates RTTI
(Run-Time Type Information) for it and all classes that descend from it.
This information can be used to stream all properties of classes.
It also introduces functionality to assign the contents of 2 classes to each other.
TPersistent implements the
IFPObserved interface for the benefit
of descendant classes, but does not call
FPONotifyObservers.
Descendants such as
TStrings and
TCollection and
TCollectionItem do use it.
See also
Methods
AssignTo | protected | Generic assignment function. |
DefineProperties | protected | Declare non-published properties that need to be streamed. |
GetOwner | protected | Returns the owner of the component. |
Destroy | public | Destroys the TPersistent instance. |
Assign | public | Assign the contents of one class to another. |
FPOAttachObserver | public | Add an observer to the list of observers. |
FPODetachObserver | public | Remove an observer from the list of observers. |
FPONotifyObservers | public | Notify observers of changes. |
GetNamePath | public | Returns a string that can be used to identify the class instance. |
Inherited
From TObject (41)
AfterConstruction BeforeDestruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance Create DefaultHandler DefaultHandlerStr Dispatch DispatchStr Disposed DisposeOf Equals FieldAddress Free FreeInstance GetDisposed GetHashCode GetInterface GetInterfaceByStr GetInterfaceEntry GetInterfaceEntryByStr GetInterfaceTable GetInterfaceWeak GetLastCastErrorInfo InheritsFrom InitInstance InstanceSize MethodAddress MethodName newinstance QualifiedClassName SafeCallException StringMessageTable SystemHasExtendedRTTI ToString UnitName
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.