Using Tree Widgets

User Interface Programming

Using Tree Widgets

Tree widgets display information in a hierarchical structure or tree. Branches and sub-branches of the tree can be expanded and collapsed (either programmatically or by the user) to display or hide the information they contain. See WIDGET_TREE for a complete description of the function used to create tree widgets.

Figure 10-1: A tree widget.

Figure 10-1: A tree widget.

This section discusses the following topics:

Types of Tree Widgets

Example: A Simple Tree

Setting the Tree Selection State

Making a Tree Entry Visible

Replacing the Default Bitmaps

Dragging and Dropping Tree Nodes

Positioning Tree Nodes

IDL Online Help (March 06, 2007)