WIP: How to define the GraphViz record structure?

[clemens-tolboom]

As #9 was just a tiny start let's define how to build this new class.

• Define a class GraphVizRecord
• Define a subclass for a GraphvizDatabaseRecord structure?
• Define a subclass for a Class Diagram?
• Apply the subclass ClassDiagram?

Relates to

• Support extending Graph, Vertex and Edge graphp/graph#82
• [WIP] Add native cloning support graphp/graph#89

[clemens-tolboom]

While writing the issue summary I guess starting directly with a GraphVizRecord is too quick.

I should reread http://www.graphviz.org/content/node-shapes#record

rlabel :== field ( '|' field )*
field :== fieldId or '{' rlabel '}'
fieldId :== [ '<' string '>'] [ string ]

Has the usual escape sequences.

• do we have covered all these in GraphViz?

It also mentions port position to draw an edge to a field within the record.

So maybe we can build the tree using Graph with Layout() and using subclassing?

• Support extending Graph, Vertex and Edge graphp/graph#82
• [WIP] Add native cloning support graphp/graph#89

[clue]

Currently, the ClassDiagramBuilder is quite difficult to work with, as it doesn't even remotely resemble a SOLID design :)

I think we should start off by refactoring the code into smaller units:

• Create a new ClassVertex that extends the base Vertex (depends on Support extending Graph, Vertex and Edge graphp/graph#82). It should abstract the Reflection interface and do little more than that.
• Create a ClassVertexRecordExporter (or any better name) that merely operates on a given ClassVertex instance in order to produce the required GraphViz dot script.
• Update ClassDiagramBuilder to build a ClassVertex instead and make sure it's hardly any more than glue code remaining :)
• Consider building a ClassVertexHtmlExporter for future use (as per Use GraphViz HTML-Like Labels instead of record shapes #5)
• Consider how to embed GraphViz port attributes (depends on How to add ports for edges (GraphViz) graphp/graph#92)

[clemens-tolboom]

Let's close this issue as both graphviz as we think as stated on http://www.graphviz.org/content/node-shapes

The record-based shape has largely been superseded and greatly generalized by HTML-like labels.

[clemens-tolboom]

Subgraphs are requested in graphp/graph#36

[clue]

Closed via #23.