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Beta testing

The style feature is still in testing stage. Starting with version 1.2019.9, style in enabled by default for mindmap and wbs diagrams.

For other diagrams, you have to use skinparam useBetaStyle true to test this feature. There are some working examples on this page.

If you are interested in helping us to define this new feature, you can contribute on the discussions on the new #style slack channel.

 

 

Current situation

Currently, skinparam are used to change the rendering (fonts, colors...) of diagrams. Although the current system is working, it has some important limitations:

What we wish:

Note that even if the existing skinparam syntax may be deprecated, all existing legacy diagrams should still work with future versions of PlantUML.

 

 

Properties that can be styled

The following properties can be set in style:

 

 

Current Working Model

The current model has moved to work similarly to CSS, using a model of scoping and cascading styles to either element types or user-assigned styles (via <<stereotype>> notation).

Style can be inlined using <style> and </style> separators.

It is also possible to store style definition in some external file and to reference it using <style file=MyOwnFile.css>.

 

 

Basic styling for elements

 

 

Basic example of a Sequence Diagram style

@startuml
skinparam useBetaStyle true
' style enclosure declaration
<style>

	' scope to sequenceDiagram elements
	sequenceDiagram {   

	 ' scope to actor element types
	 actor { 
	   FontColor Blue 
	 }

	}
} 
</style> 

' printed in blue
actor Bob 
' also printed in blue
actor Sally 
@enduml

 

 

Basic example of a Work Breakdown Structure style

Let's at a different example, that of a Work Breakdown Structure:

@startwbs
<style>
' this time, scoping to wbsDiagram
wbsDiagram {
  
  ' Here we introduce a global style, i.e. not targeted to any element
  ' thus all lines (meaning connector and borders, 
  ' there are no other lines in WBS) are black by default
  Linecolor black
  
  ' But we can also target a diagram specific element, like arrow
   arrow {
	' note that Connectors are actually "Arrows"; this may change in the future
	' so this means all Connectors and Arrows are now going to be green
	LineColor green
  }
  
}
</style>
' all lines (i.e. arrow) are green,
' because the narrow scoped "arrow" overrides the global
* World
** America 
*** Canada 
** Europe
*** England
*** Germany
*** Spain
@endwbs

 

 

Adding user defined style targets

We can extend these examples to start targeting not just element types, but specific elements.

 

 

Using user defined styles in a Sequence Diagram

@startuml
skinparam useBetaStyle true
' style enclosure declaration
<style>
	' scope to sequenceDiagram elements
	sequenceDiagram {   

	 ' scope to actor element types
	  actor { 
	    FontColor Blue 
	  }
	 
	 ' define a new style, using CSS class syntax
	 .myStyle {
	    FontColor Red
	 }
 
	}
} 
</style> 

' printed in blue
actor Bob 
' this will now be printed in Red 
actor Sally <<myStyle>>
@enduml

NOTE: If the <<myStyle>> is showing, it is likely a bug, resolved in newer betas.

 

 

Using Dynamic Selectors

NOTE: This section is still very experimental and may change!

As we are following the CSS model now, then it should be possible to use selectors to simplify targeting groups of elements, like those "children" (or "downstream") of a given element in diagrams like Work Breakdown or MindMaps.

 

 

Using the depth selector in a WBS

@startwbs
<style>
wbsDiagram {
  ' all lines (meaning connector and borders, 
  ' there are no other lines in WBS) are black by default
  Linecolor black
  
  arrow {
	' Remember that currently connectors are "Arrows"
	' So now connectors are green
	LineColor green
  }
  :depth(0) {
	' Note the Background and connector change
	  BackgroundColor White
	  RoundCorner 10
	  LineColor red
  }
  arrow {
	:depth(2) {
	  ' Targetting only connector between Mexico-Chihuahua,
	  ' and USA-Texas
	  LineColor blue
	  LineStyle 4
	  LineThickness .5
	}
  }
  node {
	:depth(2) {
	' Targetting the Lines at a depth of 2
	  LineStyle 2
	  LineThickness 2.5
	}
  }
  
}
</style>
* World
** America 
*** Canada 
*** Mexico
**** Chihuahua
*** USA
**** Texas
***< New York 
** Europe
*** England
*** Germany
*** Spain
@endwbs

 

 

Using the "descendant" pseudo selector

Of course, sometimes you want to target all "child" (or "downstream") elements of a given element. The * selector works as in CSS, to say: "this element, and all elements of any type that is it's child".

An example:

@startwbs
<style>
wbsDiagram {
  Linecolor black
  arrow {
	LineColor green
  }
  :depth(1) {
	  BackgroundColor White
	  RoundCorner 10
	  LineColor red
  }
  
  ' A user defined style, with the addition
  ' of the * selector
 .mexicoStyle * {
	 BackgroundColor Red
	 FontColor White
	 RoundCorner 10
 }
}
</style>
* World
** America 
*** Canada 
' Mexico and its "child" Chihuahua
' will use the user defined .mexicoStyle 
*** Mexico <<mexicoStyle>>
**** Chihuahua
*** USA
**** Texas
***< New York 
** Europe
*** England
*** Germany
*** Spain
@endwbs

 

 

Using an external style file

NOTE: This is still a work in progress, and may not work as expected.

If a file named plantuml.skin is found in the same folder as the diagram, it will attempt to be loaded and used during diagram creation. This lays the groundwork--along with scoping styles to specific diagrams, and user defined styles--for creating truly complex and persistent styles, without including them in each of your diagrams.

 

 

Getting debug output

NOTE: This is still a work in progress, and may not show every element in every diagram.

You can use the -v (or -verbose) command line argument to get some debug output to help you determine what elements are in use, so you can target them.

java -jar plantuml.jar -v -tpng diagram.pu

results in:

(0.378 - 256 Mo) 238 Mo - Using style node.depth(0).root.wbsdiagram.rootnode.element
(0.546 - 256 Mo) 237 Mo - Using style depth(2).node.root.wbsdiagram.leafnode.element
(0.547 - 256 Mo) 237 Mo - Using style depth(2).node.root.*.wbsdiagram.element
(0.560 - 256 Mo) 236 Mo - Using style node.root.depth(3).wbsdiagram.leafnode.element
(0.561 - 256 Mo) 236 Mo - Using style node.root.depth(3).*.wbsdiagram.mexicostyle.element
(0.562 - 256 Mo) 236 Mo - Using style node.root.depth(3).*.wbsdiagram.element
(0.565 - 256 Mo) 236 Mo - Using style depth(2).node.root.wbsdiagram.mexicostyle.element
(0.569 - 256 Mo) 235 Mo - Using style depth(2).node.root.wbsdiagram.element
(0.571 - 256 Mo) 235 Mo - Using style node.depth(1).root.wbsdiagram.element
(0.572 - 256 Mo) 235 Mo - Using style node.depth(1).root.*.wbsdiagram.element
(1.963 - 256 Mo) 250 Mo - Using style depth(0).arrow.root.wbsdiagram.element
(1.964 - 256 Mo) 250 Mo - Using style depth(1).arrow.root.wbsdiagram.element
(1.965 - 256 Mo) 250 Mo - Using style depth(2).arrow.root.wbsdiagram.element