TBaseSingleInstance class

In unit SingleInstance

Abstract class for single application instance.

Declaration

pascal

TBaseSingleInstance = class(TComponent)

Inheritance

TBaseSingleInstance
TComponent
TPersistent
TObject

Descends from it: TAdvancedSingleInstance

Description

TBaseSingleInstance is the abstract parent for classes that allow you to control the instances if your application. You must never instantiate TBaseSingleInstance directly, instead, use for example the TAdvancedSingleInstance class.

Errors

Instantiating and using this class will result in abstract errors.

Properties

`TimeOutMessages`	public	Timeout when waiting for messages.
`TimeOutWaitForInstances`	public	Timeout when trying to contact server instance.
`StartResult`	public	Contains the result of the last Start call.
`IsServer`	public	Is this application the server instance ?
`IsClient`	public	Is this application the client instance ?

Methods

`GetIsClient`	protected
`GetIsServer`	protected
`GetStartResult`	protected
`DoServerReceivedParams`	protected
`SetStartResult`	protected
`Create`	public	Create a new instance of the TBaseSingleInstance class.
`Destroy`	public	Stop waiting and destroy the instance.
`Start`	public	Check if another instance of the application is running.
`Stop`	public	Stop the current instance.
`ServerCheckMessages`	public	Check for messages from a client application.
`ClientPostParams`	public	Send parameters to the server.

Events

OnServerReceivedParams public Event triggered during ServerCheckMessages.

Inherited

From TComponent (74)

_AddRef _Release BeforeDestruction CanObserve ChangeName ComObject ComponentCount ComponentIndex Components ComponentState ComponentStyle DefineProperties DesignInfo DestroyComponents Destroying ExecuteAction FindComponent FreeNotification FreeOnRelease GetChildOwner GetChildParent GetChildren GetDeltaStreams GetEnumerator GetIDsOfNames GetNamePath GetObservers GetOwner GetParentComponent GetTypeInfo GetTypeInfoCount HasParent iicrGetComponent InsertComponent Invoke IsImplementorOf Loaded Loading Name Notification ObserverAdded Observers OnGetDeltaStreams Owner PaletteCreated QueryInterface ReadDeltaState ReadDeltaStream ReadState ReferenceInterface RemoveComponent RemoveFreeNotification RemoveFreeNotifications SafeCallException SetAncestor SetChildOrder SetDesigning SetDesignInstance SetInline SetName SetParentComponent SetSubComponent Tag ToString TToStringNameMode UpdateAction Updated UpdateRegistry Updating ValidateContainer ValidateInsert ValidateRename VCLComObject WriteState

From TPersistent (5)

Assign AssignTo FPOAttachObserver FPODetachObserver FPONotifyObservers

From TObject (37)

AfterConstruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance 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 StringMessageTable SystemHasExtendedRTTI UnitName

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.