MiG InfoCom MiG Calendar Tutorial - Manual (Page 18)

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the javadocs.
All built in AShape implementations are serializable to XML with the
default Java beans persistence using the standard get/set naming
convention. There is no special
Delegate needed for this.
AShape s can be used in two ways. There is the normal one-to-one
usage pattern which means that one shape will be used to paint one
thing. This would not be scalable if there are 1.000 or maybe 10.000
things to paint as it would mean that many
AShape s would have to
be created. That would consume an unnecessary amount of
resources. Therefore all
AShape types are stampable. This means
that the same AShape instance can be used to paint multiple,
normally all, entities (e.g. ActivityView s). An Interactor is
used as the peer between the 'thing' to paint/decorate and the
AShape . That Interactor is more light weight than the AShape
and should contain the per-'thing' information, if any. It also has other
functionality, see the Interactions section below.
Attributes, such as Paint , Font and PlaceRect , of the AShape s
are stored in a Map in the AbstractShape class. A key is used for
getting and setting the attributes. Every AShape subclass documents
which keys to use to access the attributes interesting for that class.
For further details on how to build and use AShape s see the
AShape tutorial and the Getting Started Guide.
Interactions – how the user interacts
The Interaction framework is a Action/Command-like pattern optimized
to fit the MiG Calendar component.
To start with we have the Interactor hierarchy of classes, which
includes ActivityInteractor, MouseKeyInteractor and
TimerInteractor . An Interactor is the peer to some
functionality that need to be monitored and interacted with. For
instance the
MouseKeyInteractor monitors mouse and key
events and for every one of them it evaluates if there is a registered
Interaction that should be triggered.
An Interaction , not to be intermixed with Interactor , mainly
consists of three parts:
1. A trigger of some kind (e.g. mouse move)
2. An Expression that needs to be evaluated to true . E.g.
MouseButton == 1
MiG Calendar Tutorial Page 18 / 24