TValueEvent

All Units All Classes Properties, Methods and Events

TValueEvent

type TValueEvent = (veClear, veAdd, veDelete, veRefresh, veModify);

Unit
TeEngine

Description
The TChartSeries notify other series whenever points are added, deleted, modified, etc.

The TChartSeries.NotifyValue protected method uses the ValueEvent parameter to tell other series of a data change event.

veClear: The series points have been removed. The series has been cleared.
veAdd : A new point has been added
veDelete : A point has been removed.
veRefresh: After modifying points, the RefreshSeries method has been called.
veModify: A point value has been modified.

Series that are data-source objects for other series generate these events.

For example, if Series1.DataSource := Series2, Series2 will inform Series1 of the above events.