Question

How to set selection mode single in dijit.Tree? What I mean by selection mode single is user should not be able to select multiple nodes by making use of shift key or ctrl key + mouse click on node.

Answer 1

The selection is handled by dijit/Tree::dndController, which defaults to dijit/tree/_dndSelector. There is a property singular in _dndSelector and its documentation states:

singular: Boolean

Allows selection of only one element, if true.

Tree hasn’t been tested in singular=true mode, unclear if it works.

Anyway, it seems to work:

var tree = new dijit.Tree({
    id: "tree1",
    model: model
}).placeAt(win.body());

tree.dndController.singular = true;

Check it out at jsFiddle: http://jsfiddle.net/phusick/UxWUs/