Table Tree Property: Events
You can use the Events property to enable or disable events or groups of events. Disabling events can improve performance, especially for operations that manipulate large chunks of data. Events may also be turned on and off temporarily.
Note that one event cannot be disabled: the DuplicatedKey event is always fired and cannot be turned off.
The following values are available for the Events property:
Value |
Description |
DisableAllTreeEvents = 0 |
Disable all events |
EnableTableCreate = 1 |
Fire event after associated table is created. (Not implemented yet) |
EnableTableClear = 2 |
Fire event after associated table is deleted (Not implemented yet) |
EnableTreeDataChange = 4 |
Not implemented yet. |
EnableNodeInsert = 8 |
Fire NodeInsert event after a node is inserted. |
EnableNodeRemove = 16 |
Fire NodeRemove event after a node is removed. |
EnableBeforeInput = 32 |
Fire BeforeLabelEdit event before user input. |
EnableAfterInput = 64 |
Fire AfterLabelEdit event after user input. |
EnableCollapse = 128 |
Fire Collapse event before a node is collapsed. |
EnableExpand = 256 |
Fire Expand event before a node is expanded. |
EnableClicks = 512 |
Fire Click, DblClick, ItemClick and ItemDblClick events. |
EnableKeyboardEvents =1024 |
Fire KeyUp and KeyDown events. |
EnableSelectionEvent = 2048 |
Fire SelChange event. |
EnableDragDropEvents = 4096 |
Fire DragSourceFill, DragComplete, DropEnter and Drop events. |
EnableTreeError = 16384 |
Fire Error event after an error occurred. |
EnableStandardTreeEvents |
Enable summary of standard events. |
EnableAllTreeEvents = 32767 |
Enable all events. |
All values may be combined through and or or operations.
‘ Enable NodeInsert and NodeRemove event
MyControl.Events = MyControl.Events or EnableOnNodeInsert or _ EnableOnNodeRemove
‘ Disable NodeInsert and NodeRemove event
MyControl.Events = MyControl.Events and not _
(EnableOnNodeInsert or EnableOnNodeRemove)