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JGraph User Manual
localAttributes.
allAttributesLocal is a boolean flag that determines whether or not to make all
attributes view-local, so the all attributes set in the GraphLayoutCache are stored locally
in the cell views and those are the attributes used for the visualization.
localAttributes is a Set of attribute keys ( e.g. GraphConstants.BOUNDS,
GraphConstants.FONT, etc. ) that use the value in the cell view attribute map over that
in the graph model cell. You can set all attributes to view-local using:
setAllAttributesLocal(true);
and set the value of localAttributes using:
setLocalAttributes(attributeSet);
Note the setting of the local attribute set overwrite the current set, it does not add to it.
Therefore, if you wish to add to it, call getLocalAttributes() and add to the set
obtained in-place.
Note, if you wish to remove a view-local attribute this requires more than simply
removing the key from the local attributes set. The attribute value should also be removed
from all cell view that have that attribute set. Depending on application requirements, you
will either leave the attributes deleted or re-add them to the equivalent graph model cells'
attribute
maps.
From
JGraph
5.6.3
onwards
the
method
removeLocalAttribute(Object attribute, boolean addToModel) is
available in the GraphLayoutCache to assist this process. The attribute is the key
to be removed and the flag indicates whether or not to re-add the deleted attribute to the
model cells.
As previously mentioned, if you perform an insert call to the model with a partial layout
cache, the cell is invisible to start with in the layout cache. If you perform an edit on the
model and you change an attribute which is view-local in a graph layout cache, the value
does not get passed to the cell views' attribute maps. Similarly, if you perform an edit
directly on a graph layout cache any view-local attributes are not passed onto the model
cells. This means you can have colors, cell positions and size, text font, any of the attributes
in GraphConstants display differently in one view to another by using partial layout
caches, setting the appropriate attributes to be view-local and editing those attributes using
the edit call on the partial layout cache.
In the examples directory of the package you received with this user manual you will find
the file org.jgraph.example.GraphEdMV.java. This is an example
implementation of a simple multi-view application. The following code in the constructor of
GraphEdMV sets the view-local attributes:
Set localAttributes = new HashSet();
localAttributes.add(GraphConstants.BOUNDS);
localAttributes.add(GraphConstants.POINTS);
localAttributes.add(GraphConstants.LABELPOSITION);
localAttributes.add(GraphConstants.ROUTING);
graph.getGraphLayoutCache().setLocalAttributes(localAttributes);
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