JDiagram version 4.4 contains the following new features and improvements:

New CompositeNode components
Component classes that support user interaction can now be used as part of CompositeNode templates:

• ButtonComponent implements clickable buttons inside nodes;
  
• CheckBoxComponent implements check-boxes that can be toggled on and off;
  
• EditComponent implements editable text area;
  
• NumericEditComponent implements number-entry area;
  
• SliderComponent allows selecting a value from numerical range by dragging a slider;
  
• SpinnerComponent represents a spin-edit component;
  

Code (xml):

<StackPanel Orientation="Vertical" GridColumn="1">      <Button Name="Button" Width="10" Height="10"/>      <Edit Name="Edit" Width="50" Height="30"/> </StackPanel>

Code (java):

if (node instanceof CompositeNode) {      CompositeNode cnode = (CompositeNode)node;      ButtonComponent button = (ButtonComponent)cnode.findComponent("Button");      button.addComponentMouseEventListener(          new ComponentMouseEventAdapter()          {                @Override                public void mouseClicked(Object sender, ComponentMouseEvent e)                {                      EditComponent edit = (EditComponent)cnode.findComponent("Edit");                      edit.setText("click");                }          }); }

Improved FlowchartLayout
FlowchartLayout can now arrange more types of graphs, no longer requiring them to represent strictly-nested source code structures.

If anyone is interested in trying the beta version, please download this archive containing updated JAR file:
https://mindfusion.eu/_beta/JDiagram44.zip

Any comments, questions and general feedback are welcome.