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Adds an AcroForm push button widget to the current page.
Delphi 语法:
procedure AddPushButton(const FieldName, Caption: AnsiString; Rectangle: TRect; Flags: THPDFFormFieldFlags = []);
说明
该方法创建带 Pushbutton flag 的 /Btn field，并通过 widget appearance characteristics 写入 caption。当按钮需要 submit form、reset form、run JavaScript、open a URI、trigger a named viewer command 或 hide another field 时，请使用 AddPushButtonWithAction；当一次点击需要顺序执行两个 action 时，请使用 AddPushButtonWithNextAction
THPDFButtonAction values
baNone — no /A action
baSubmitURL — /S /SubmitForm with /FS /URL filespec (PDF 1.2 §12.7.5.2). Param is the destination URL.
baResetForm — /S /ResetForm resets every form field (PDF 1.2 §12.7.5.3).
baJavaScript — /S /JavaScript /JS (Param) (PDF 1.3 §12.6.4.16).
baURI — /S /URI /URI (Param) (PDF 1.1 §12.6.4.7). Opens the URL in a browser.
baNamed (HotPDF v2.119.18) — /S /Named /N <Param> (PDF 1.1 §12.6.4.11). Param is the spec name token: NextPage / PrevPage / FirstPage / LastPage (the four standard navigation commands all PDF readers honour). Acrobat extensions like Print and SaveAs are also accepted by compatible viewers.
baHide (HotPDF v2.119.18) — /S /Hide /T (Param) /H true (PDF 1.2 §12.6.4.10). Param is the name of the form field or annotation to hide when the button is clicked.
Compliance
PDF/A（任何级别）依 ISO 19005-1 §6.6.1 / ISO 19005-2 §6.5.1 / ISO 19005-3 §6.5.1 拒绝 baJavaScript 和 baResetForm。PDF/X（任何级别）额外拒绝 baSubmitURL。baNamed 和 baHide 在 PDF/A 与 PDF/X 下都被规范允许。
另请参阅: AcroForm 支持, AddPushButtonWithNextAction, LastAnnotation
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