TreeElementStyle

is an option for Tree and related functions that specifies what style should be used for subtree elements.

Details

TreeElementStyle allows specifying the style of the root node of a tree, as well as that of any subtrees at positions matching a pattern.
The following option settings can be used:

	Automatic	use the automatic setting for style
	style	use style for the subtree element
	{pos₁style₁,pos₂style₂,…}	use style_i for the subtree element at relative position pos_i
	{patt₁style₁,patt₂style₂,…}	use style_i for the subtree elements at positions matching the pattern patt_i

Subtrees with no explicit element style are taken to use the automatic style.
TreeElementStyle can apply to points, lines and faces.
To specify multiple style directives, use Directive[style₁,style₂,…].
Subtree element style specifications are effectively applied in the order TreeElementStyle, TreeElementStyleFunction and TreeElementShapeFunction, with later specifications overriding earlier ones.
In TreeElementStyle, Allstyle uses style for all subtrees.
In TreeElementStyle, TreeCases[pattern]style uses style for all subtrees with data matching pattern.

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Style an individual subtree element:

Style all subtree elements:

Use the same style for all subtrees:

Specify positions using position patterns:

Specify positions using data patterns:

Styles for subtree elements can be specified by position:

Styles specified by a subtree take precedence over styles specified by its ancestors:

A position {i,j,…} in a subtree refers to its subtree at relative position {i,j,…}:

A relative position {2} at position {1} refers to the global position {1,2}:

In general, a pattern patt applies to subtrees at global positions {i,j,…} that match patt:

A list of patterns {patt₁,patt₂,…} applies to relative positions {i,j,…} that match the patt_i:

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