ui.Dialog.deleteNode

Deletes a node from the specified tree-view.

Syntax

deleteNode(
   name STRING,
   index INTEGER )
  1. name is the screen array name.
  2. index is the index of the node in the program array that has to be deleted (starts at 1).

Usage

The deleteNode() method is similar to deleteRow(), except that it has to be used when the dialog controls a tree view.

This method must be used when modifying the array of a tree view during the execution of the dialog, for example when implementing a dynamic tree with ON EXPAND / ON COLLAPSE triggers. Before the execution of the dialog, you can fill the program array directly. This includes the context of BEFORE DISPLAY or BEFORE DIALOG control blocks.

The main difference with deleteRow() is that deleteNode() will remove recursively all child nodes before removing the node identified by index.

If the index is zero, all root nodes will be deleted from the tree.