THotPDF.GetLoadedAnnotationInfo Method
Reads the subtype and position rectangle of a specific annotation on a specified page of the loaded PDF, facilitating rapid filtering and locating of specific annotations without parsing the entire dictionary
Declaration
function GetLoadedAnnotationInfo(PageIndex, AnnotationIndex: Integer; out ASubtype: AnsiString; out ARect: THPDFRect): boolean;Unit
HPDFDoc
Parameters
| Name | Purpose |
|---|---|
PageIndex | Zero-based index of the target page |
AnnotationIndex | The zero-based index of the target annotation in the page's Annots array |
ASubtype | 输出参数，接收注释的 Subtype 字符串，如 Text、Link、Widget |
ARect | Output parameter, receives the position rectangle of the annotation on the page (PDF coordinate system) |
Return value
若成功读取注释信息则返回 True，索引越界或注释解析失败时返回 False，且输出参数值未定义
Usage notes
- 调用前应先通过
GetLoadedAnnotationCount获取有效索引范围，避免越界访问 - 返回
False时，ASubtype和ARect的内容不可信，不得使用 - 如需访问注释的完整属性（如颜色、内容文本、动作），应进一步调用
GetLoadedAnnotationDict获取字典对象