:   '''[BWidget]::Tree''' ''pathName'' ?''option value…''?

This is a [tree] widget that uses a [canvas] internally to display a hierarchical list of items (called nodes).

**Manual page**
http://tcllib.sourceforge.net/BWman/Tree.html

**Examples**
   * [Tree nodes in motion]
   * [Display a graph in a BWidget Tree]
   * [LemonTree]
   * [starDOM]

----
<<discussion>>Selection Improvements

[TR] - The '''Tree''' has no default binding for the selection of ranges. This is usually done by selectiong a node and then selecting another while pressing down the ''Shift'' key. This proc will do the work:

======
proc TreeSelectRange {tree node} {
        #
        # add a continuous range of nodes to an existing selection
        #
        # tree -> path to the BWidget tree
        # node -> the node that has been clicked on
        #
        
        # remember current selection:
        set sel [$tree selection get]
        # get last selected node:
        set last [lindex $sel end]
        # select the requested range:
        $tree selection range $last $node
        # add the remembered nodes:
        foreach node $sel {$tree selection add $node}
}
======
Then you just need something like
======
$tree bindText <Shift-Button-1> [list TreeSelectRange %W]
======
to make the binding work.



<<categories>> Widget | BWidget