CanContainEntrances |
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CreateEntrance FindEntranceFromDestination InstallEntrance InstallInto |
Class CanContainEntrances defines no new attributes.
Fields
No fields are defined by CanContainEntrances or any of its superclasses.
Instance template
Class CanContainEntrances cannot be instantiated.
Class definition
Define Class CanContainEntrances;
mixes in with Viewable;
operation InstallEntrance(newEntrance: Entrance);
// Installs an entrance. The default method just places
// the new entrance in the view heirarchy.
// Sometimes override to do something special when an entrance has
// been installed into self.
operation CreateEntrance(destination: Viewable; image: Image) : Entrance;
// Make an entrance that knows how to install itself into
// this place. Call InstallSelf on the object returned in
// order to install it. The default method returns an icon
// with nativeContainer set to self.
// Override if it makes sense to provide a different kind of
// entrance to self. (e.g., hallways make doors instead of icons)
operation FindEntranceFromDestination(destination: Viewable) : Viewable;
// Tries to find an entrance which leads to a particular destination.
// Returns nilObject on failure.
// Rarely override.
overrides InstallInto;
// InstallInto is here temporarily until we wean ourselves away
// from using InstallInto for entrances. This method just calls
// InstallEntrance and ignores the flags and parameters which
// are passed to it (except in the case of scenes, which use
// InstallInto for scene additions).
// Rarely override.
end class;