TiPlotComponent.OnBeforeZoomBox
TiPlotComponent
Occurs before properties are loaded into the component using the Runtime
Property Editor or LoadPropertiesFromFile method.
type TiPlotZoomBoxEvent = procedure(var ZoomRect: TRect; var Cancel: Boolean) of object;
property OnBeforeZoomBox : TiPlotZoomBoxEvent;
Description
Use OnBeforeZoomBox to specify actions to perform before the zoom is applied
to the chart or to cancel the zoom before the zoom is applied.
To cancel the zoom, set the Cancel property to True
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