TBaseListMediator class
Base mediator for handling lists of observable objects
Declaration
TBaseListMediator = class(TBaseMediator)Inheritance
- TBaseListMediator
- TBaseMediator
- TComponent
- TPersistent
- TObject
Descends from it: TColumnsListMediator
Description
The TBaseListMediator class extends TBaseMediator to handle collections of objects.
It creates individual item mediators for each object in the list and manages their lifecycle automatically.
The subject must be a TObjectList, TList, or TCollection.
The mediator responds to list changes by creating, updating, or destroying item mediators as needed. T
his class is abstract and must be subclassed to provide specific GUI integration.
Each item in the list is handled by a TListItemMediator instance, allowing individual objects to have their own observer relationships and data binding behavior.
See also
Properties
MediatorList | protected | |
SelectedObject | public | Currently selected object in the list |
Methods
PublishedViewProperty | protected | |
AddObject | protected | |
SetActive | protected | |
GetSelectedObject | protected | |
SetSelectedObject | protected | |
CreateItemMediator | protected | |
DoDeleteItemMediator | protected | |
CreateSubMediators | protected | |
DoViewToObject | protected | |
DoObjectToView | protected | |
SetSubject | protected | |
FindObjectMediator | protected | |
Create | public | Creates a base list mediator instance |
Destroy | public | Destroys the list mediator and all item mediators |
CompositeMediator | public | Returns True indicating this is a composite mediator |
ObservedChanged | public | Handles changes in the observed list objects |
Events
OnBeforeSetupField | published | Event for formatting field values in all item mediators |
Inherited
From TBaseMediator (25)
Active CheckPropertyName CheckViewSubject FPOObservedChanged GetView MaybeObjectToView MaybeViewToObject ObjectToView OnObjectToView OnViewToObject PublishedSubjectProperty RaiseMediatorError ReadOnly SetSubjectPropertyName Subject SubjectPropertyName Transferring Valuelist ValuelistChanged View ViewChanged ViewChangedHandler ViewClass ViewPropertyName ViewToObject
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.