TControlWeakReference
Weak reference to an other
TControl.Inheritance
| Level | Ancestor | Description |
|---|---|---|
| 1 | TObject | Ultimate ancestor in a class hierarchy |
| 2 | TBaseObject | A base class for objects that can be used instead of TObject. |
| 3 | TControlWeakReference |
Source
UserInterface.Control.WeakReference.pas (27)
Description
The reference to the control is weak in the sense that when the control is destroyed, Value is set to
nil. Also, Referrer is automatically added to and removed from Value.Listeners
whenever Value is updated.
Fields
| Scope | Visibility | Type | Name | Description |
|---|---|---|---|---|
| Instance | private | TTarget | FValue | |
| Instance | private | TBaseObject | FReferrer |
Methods
| Scope | Visibility | Result | Name | Description |
|---|---|---|---|---|
| Instance | private | SetValue(Value: TTarget) | ||
| Instance | private | AttachToValue() | ||
| Instance | private | DetachFromValue() | ||
| Instance | public | Create(Referrer: TBaseObject) | ||
| Instance | public | Destroy() | ||
| Instance | public | TBoolean | HandleEvent(Event: TEvent) |