Custom Styles Tutorial

Using Data in Label Tag

This step shows how to use data from a business object, which is stored in the label's tag, for rendering. This mechanism also applies to nodes, edges and ports. In this example, a dummy business object, which only defines a color, is stored. This color is used to set the background of the label. You can store any object you like in the tag in order to use its data in the style.

Note that, in contrast to MySimpleNodeStyle, you can change the color of each label separately without affecting other labels that use the same style instance.

Things to Try

Change the label tags in method SampleApplication.createLabelTags() and see what happens.
Take a look at class MySimpleLabelStyle, especially method createRenderDataCache().

Left to Do

Create a custom edge style.
Create a custom port style for nodes.
Use the decorator pattern to add label edges to the nodes.
Create a custom group node style.