node <-
collapsed: bool*When @on, the
image related to this node is displayed, but all subnodes will be made
invisible. node->collapsed
and tree->zoom
make it possible to visualise only a small part of a large tree. A tree
might contain multiple collapsed nodes.
If the tree is displayed using tree->direction,
an image is displayed at the left-hand of the line connecting the node
to its parent. This image depends on the value of
node<-collapsed:
- @(on)
- Show a [+] sign (pce
.Tree.collapsedImage). If
the user lef-clicks on this sign, a message node->collapsed: @off
is sent to the node.
- @(off)
- Show a [-] sign (pce
.Tree.expandedImage). If
the user lef-clicks on this sign, a message node->collapsed: @on
is sent to the node.
- @(nil)
- Shows nothing, no events are handled for collapse/expand.
See library(pce_toc) for an example and a starting point
the visualisation of a hierarchy. See also tree->direction.
- See also
- - tree
->zoom
- node-displayed
- tree->collapsed_handler
