JVCL Help:TJvCustomPageList.OnChanging

 JVCL Help: TJvCustomPageList.OnChanging Event

TJvCustomPageList

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[+] TJvCustomPageList Methods

► TJvCustomPageList Properties

[+] TJvCustomPageList Properties

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Summary

Occurs immediately before a new page is selected.

Pascal

 TJvPageChangingEvent = procedure (Sender: TObject; PageIndex: Integer; var AllowChange: Boolean) ofobject;
propertyOnChanging: TJvPageChangingEvent;

Parameters

Parameters	Description
AllowChange	Set to false to disallow the change. This parameter is true by default.
PageIndex	The index of the page that is to become selected.
Sender	The page list that triggered the event.

Description

Write an OnChanging event handler to take specific action immediately before the selected page changes. Set the AllowChange parameter to false to prevent the change.
Use an OnChanging event handler to prevent the user from leaving a page until certain conditions have been met. An OnChanging event handler can also be used to save information about the current state of the page before it is changed by a new page selection.
To access the currently active page, access either the ActivePage or ActivePageIndex properties.

See Also

TJvCustomPageList.ActivePage, TJvCustomPageList.ActivePageIndex, TJvCustomPageList.OnChange

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