FormHostCallbacksComplete property

Component: TPdf · Unit: PDFium

Reports whether every optional form host callback is wired

Syntax

property FormHostCallbacksComplete: Boolean read GetFormHostCallbacksComplete;

Description

FormHostCallbacksComplete returns True when the form host object has every optional callback slot populated, including the cursor, value-change, URI action, go-to action and selection-rectangle callbacks that back the OnForm* events

A False value means part of the interactive form surface falls back to default behaviour because the loaded runtime does not expose all entry points

Remarks

The value is meaningful only whilst a document with a form layer is loaded
Check it after LoadDocument when the host relies on OnFormSelectionRect or OnFormCursor being raised

Example

if not Pdf1.FormHostCallbacksComplete then
Log('Form host runs with reduced callbacks');