We have released version 4.1 of JDiagram. It contains the following new features:

Tree map layout
Tree maps represent hierarchies by nesting child nodes within their parents, where the areas of leaf nodes are proportional to their Weight values. Unlike other layout algorithms, TreeMapLayout expects hierarchies to be defined via grouping or containment (see attachTo method and ContainerNode class), and will ignore any links in the diagram. The diagram area covered by the topmost nodes in a hierarchy is specified via the LayoutArea property. By default, the layout tries to keep the ratio of node sides as close as possible to one. However this could make it hard to distinguish separate levels of the hierarchy. To alleviate that, set Squarify to false, and child nodes will be arranged either as a row or a column inside their parent node, alternating directions for each level. The drawback is that when Weight ratios differ greatly or nodes contain many children, some nodes could end up with very narrow rectangles.



Decision flowchart layout
DecisionLayout arranges simple flowcharts consisting of decision boxes with up to three outgoing links per node and activity boxes with a single outgoing link per node. The nodes are arranged in columns and rows, whose distance depends on the HorizontalPadding and VerticalPadding property values. When links share the same row or column, they are placed at a distance specified via LinkPadding. The layout arranges nodes recursively starting from StartNode. If StartNode is not specified, the algorithm selects the root of the deepest branch of the graph's spanning tree as start node.



Composite nodes
The CompositeNode class implements nodes whose appearance can be defined via composition of components and layout containers. The content of a composite node can be loaded from XML files similar to .NET Xaml templates and Android XML layouts. This initial release includes layout containers such as StackPanel and GridPanel, and read-only components like ImageComponent, TextComponent, ShapeComponent, BorderComponent. Future versions will add interactive components like buttons and text editors.

Export Visio 2013 files
The VisioExporter class can export the content of Diagram and DiagramDocument objects to Visio 2013 VSDX files. In order to use it, import the com.mindfusion.diagramming.export namespace. VisioExporter relies on a template file, called Visio2013.vxt, containing some boilerplate Visio XML code. The template must be either located in same folder as the application, or its path must be specified via the TemplatePath property. At this time the exporter supports shapes from Visio basic stencil. Support for more shapes will be added upon request.

Miscellaneous
~ Layout algorithms now automatically resize diagram's Bounds if it's not large enough to fit the arranged content. To revert to old behavior and keep fixed Bounds size, set GrowToFit to false.
~ Improved PdfExporter performance.
~ VisioImporter now supports Visio group shapes. Child shapes in groups are no longer lost when importing, and their corresponding diagram nodes are attached to the corresponding group node.

Registered customers with an active upgrade subscription can download the licensed version from the clients area on our site.

A trial version is available for download here:
https://www.mindfusion.eu/JDiagramTrial.zip
    
Enjoy!