Table Of Contents

Tree Control Event Reference

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Last Modified: February 27, 2020

The following events occur when the user performs an action that involves a tree control.

Event Description Event Data Fields
Item closed

Occurs when the user closes an item in a tree control.

  • Time—Value of the millisecond timer when the event occurred.
  • Index—Index of the event source within an individual event diagram.
  • Control Reference—Reference to the control on which the event occurred.
  • Location—Hierarchical location of the closed item.
  • Data—Data for the closed item, including the hierarchical location and associated data for the columns.
Item opened

Occurs when the user expands an item in a tree control.

  • Time—Value of the millisecond timer when the event occurred.
  • Index—Index of the event source within an individual event diagram.
  • Control Reference—Reference to the control on which the event occurred.
  • Location—Hierarchical location of the expanded item.
  • Data—Data for the expanded item, including the hierarchical location and associated data for the columns.
Selection changed

Occurs when the user selects or deselects one or more items in a tree control.

  • Time—Value of the millisecond timer when the event occurred.
  • Index—Index of the event source within an individual event diagram.
  • Control Reference—Reference to the control on which the event occurred.
  • OldSelection—Hierarchical location of the previously selected item. This event data field can be a string or an array of strings, depending on the selection mode of the tree control.
  • NewSelection—Hierarchical location of the selected item. This event data field can be a string or an array of strings, depending on the selection mode of the tree control.
  • SelectedData—Data for the selected item, including the hierarchical location and associated data for the columns. This event data field can be a cluster or an array of clusters, depending on the selection mode of the tree control.

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