Mig-infocom MiG Calendar Tutorial Manual de usuario descargar pdf (Pagina 14)

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When you write your own importer of activities, or create a factory that

creates them you should implement ActivityIOPlugin. It

contains some informative methods where you can provide an ID and

a human readable name.

Resolving version conflicts

The reason you have to implement ActivityIOPlugin is so that

every Activity has a parent that can take care of its life cycle.

When you add the Activity to the depository you also have to

provide a reference to the plugin that read or created the Activity.

If there already exists an Activity with the same ID as the one

you are adding a version conflict will arise, no matter if they actually

are equal, that is for the ActivityResolver so decide.

If no ActivityResolver is installed for the the

ActivityDepository, the Activity with the most recent

modification date will be retained and the other one discarded. If

another synchronization algorithm is to be used, the

ActivityResolver can easily be replaced for a more advanced

or better suited one.

Laying out the ActivityViews

Point to time to pixels

How to map a certain date range to some bounds in a pixel based

date area is not trivial one. MiG Calendar has a very flexible solution

and a very powerful default implementation that should be sufficient

for almost any need.

More than one layout simultaneously

The DefaultDateArea has support for multiple layouts at the

same time. The layouts are ordered after how keen they are to layout

a certain ActivityView. The installed layout that reports the

highest integer value for a ActivityView will, during the layout

run, be asked to layout that view.

During the layout run the layout that is first (layouts are sortable and

sorted in their natural order, which is changeable) in line will be asked

to layout its views. It does so and returns all rectangles that are now

'occupied'. The next layout will have to, or should, consider these

occupied rectangles as forbidden areas and have to layout around

them.

More then one level

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Mig-infocom MiG Calendar Tutorial Manual de usuario Pagina 14