THotPDF.SetFormFieldAdditionalAction Method

方法摘要: THotPDF.SetFormFieldAdditionalAction MethodTHPDFActionBuilder under the field widget /AA dictionary

宣告

procedure SetFormFieldAdditionalAction(const FieldName: AnsiString; Trigger: THPDFFormFieldActionTrigger; Action: THPDFActionBuilder);

HPDFDoc

名稱	用途
`FieldName`	要在已產生欄位清單中尋找的既有 AcroForm 欄位名稱
`Trigger`	欄位 additional-action 觸發器：KeyStroke、Format、Validate 或 Calculate
`Action`	以 THPDFActionBuilder 建立的 action chain`THPDFActionBuilder`

請在建立目標欄位之後、EndDoc 之前呼叫此方法EndDoc
The method replaces any existing action for the same trigger key and keeps other /AA entries unchanged
Use ClearFormFieldAdditionalAction to remove one field trigger entry without disturbing other field actions
Use the named helpers in THotPDFFormFieldActionConvenienceMethods when code should call one method per field or widget trigger
此方法會替換同一觸發鍵的既有動作，並保持其他 /AA 項目不變
要移除單一欄位觸發器項目而不影響其他欄位動作，請使用 ClearFormFieldAdditionalActionAttachFieldKeyStrokeAction, AttachFieldFormatAction, AttachFieldValidateAction, or AttachFieldCalculateAction for the JavaScript-only convenience path