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- tree: Inserts a tree widget
-
- The 'tree' tag displays a dynamic tree widget by querying Zope
- objects.
-
- Syntax
-
- 'tree' tag syntax::
-
- <dtml-tree [VariableName|expr="VariableExpression"]>
- </dtml-tree>
-
- The 'tree' tag is a block tag. It renders a dynamic tree widget in
- HTML. The root of the tree is given by variable name or
- expression, if present, otherwise it defaults to the current
- object. The 'tree' block is rendered for each tree node, with the
- current node pushed onto the DTML namespace.
-
- Tree state is set in HTTP cookies. Thus for trees to work, cookies
- must be enabled. Also you can only have one tree per page.
-
- Attributes
-
- branches=string -- Finds tree branches by calling the named
- method. The default method is 'tpValues' which most Zope objects
- support.
-
- branches_expr=string -- Finds tree branches by evaluating the
- expression.
-
- id=string -- The name of a method or id to determine tree
- state. It defaults to 'tpId' which most Zope objects support. This
- attribute is for advanced usage only.
-
- url=string -- The name of a method or attribute to determine tree
- item URLs. It defaults to 'tpURL' which most Zope objects
- support. This attribute is for advanced usage only.
-
- leaves=string -- The name of a DTML Document or Method used to
- render nodes that don't have any children.
-
- header=string -- The name of a DTML Document or Method displayed
- before expanded nodes. If the header is not found, it is skipped.
-
- footer=string -- The name of a DTML Document or Method displayed
- after expanded nodes. If the footer is not found, it is skipped.
-
- nowrap=boolean -- If true then rather than wrap, nodes may be
- truncated to fit available space.
-
- sort=string -- Sorts the branches by the named attribute.
-
- reverse -- Reverses the order of the branches.
-
- assume_children=boolean -- Assumes that nodes have children. This
- is useful if fetching and querying child nodes is a costly
- process. This results in plus boxes being drawn next to all nodes.
-
- single=boolean -- Allows only one branch to be expanded at a
- time. When you expand a new branch, any other expanded branches
- close.
-
- skip_unauthorized -- Skips nodes that the user is unauthorized to
- see, rather than raising an error.
-
- urlparam=string -- A query string which is included in the
- expanding and contracting widget links. This attribute is for
- advanced usage only.
-
- Tag Variables
-
- tree-item-expanded -- True if the current node is expanded.
-
- tree-item-url -- The URL of the current node.
-
- tree-root-url -- The URL of the root node.
-
- tree-level -- The depth of the current node. Top-level nodes have
- a depth of zero.
-
- tree-colspan -- The number of levels deep the tree is being
- rendered. This variable along with the 'tree-level' variable can
- be used to calculate table rows and colspan settings when
- inserting table rows into the tree table.
-
- tree-state -- The tree state expressed as a list of ids and
- sub-lists of ids. This variable is for advanced usage only.
-
- Tag Control Variables
-
- You can control the tree tag by setting variables.
-
- expand_all -- If this variable is true then the entire tree is
- expanded.
-
- collapse_all -- If this variable is true then the entire tree is
- collapsed.
-
- Examples
-
- Display a rooted in the current object::
-
- <dtml-tree>
- <dtml-var title_or_id>
- </dtml-tree>
-
- Display a tree rooted in another object, using a custom branches
- method::
-
- <dtml-tree expr="folder.object" branches="objectValues">
- Node id : <dtml-var getId>
- </dtml-tree>
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