FAQ.md

Frequently Asked Questions

Where is the classes RTView

The class RTView belongs to Roassal2. A class that begins with RT belongs to Roassal2. In Roassal, classes begins with RS.

What about the book Agile Visualization

The book http://agilevisualization.com is about Roassal2. Very little can be reused from the book for Roassal. A new edition of Agile Visualization will appear during 2020.

How to export a visualization to PDF or SVG?

We provide a set of exporter in https://github.com/pharo-graphics/RoassalExporters We support PDF, SVG, MOV, and MP4. The last two file format are useful for animations.

How to export a visualization in a given size of a PDF?

You need to have the exporters https://github.com/pharo-graphics/RoassalExporters The following code exports a visualization as a PDF file, using letter size:

c := RSCanvas new.

lbls := RSGroup new.
Collection withAllSubclassesDo: [ :cls |
    lbl := RSLabel new text: cls name; model: cls.
    lbls add: lbl ].
c addAll: lbls.

RSNormalizer fontSize
    shapes: lbls;
    normalize: #numberOfMethods.
   
c @ RSHierarchyPacker.

c extent: (RSPageExtent letter).
c when: RSExtentChangedEvent do: [ :evt |
	c camera zoomToFit: c extent.
	].

c pdfExporter
	fileName: '/tmp/test3.pdf';
	export.

How to make an object visualizable using GTInspector?

GTInspector is a moldable inspector that is part of Pharo and was developed as part of the Glamorous Toolkit project. GTInspector offers a way to hook visualization in it.

MyClass>>gtInspectorViewIn: composite
	<gtInspectorPresentationOrder: -10>
	composite Roassal
		title: 'View';
		initializeCanvas: [ | c |
			c := RSCanvas new.
			...
			c ]
			

It is a good practice to have initializeCanvas: [ self visualize ] and define a method visualize in MyClass. Either way, you can now inspect an instance of MyClass.