THPDFPage

方法         屬性      總覽

THPDFPage represents a single page in the PDF document.

Unit

HPDFDoc.pas

Description

Use THPDFPage to draw paths, place text, render images, and control page-level settings such as size, orientation, and graphics state

Use TextFromBaseLine(True) when text coordinates should refer to the font baseline instead of the default top-edge position, use SetEmbeddedGlyphFont and DrawEmbeddedGlyphRun for exact caller-owned font programs and glyph IDs, use AppendScopedRawContent when expert PDF operators should be wrapped in an automatic graphics-state save and restore pair, and use TextOutBoxEx / WideTextOutBoxEx when wrapped text output should report written characters, written rows, and overflow status

一般流程中，執行個體由 THotPDF 建立並擁有：頁面在 BeginDoc 之後經由 AddPage、InsertPage 與 CurrentPage 屬性取得，以 EndDoc 收尾文件或銷毀元件時會釋放每一頁；公開的無參數 Create 建構子與 Destroy 解構子則可供文件工作階段之外的獨立頁面物件使用，單元測試正是這樣在不建完整元件的情況下驗證頁面層級預設值

單元

HPDFDoc.pas

說明

使用 THPDFPage 繪製 paths、放置文字、render images，並控制 size、orientation 與 graphics state 等 page-level settings

使用範例：

uses

  ...

  HPDFDoc,

  ...

type

   ...

   HPDF: THotPDF;

   ...

procedure TForm1.HelloWorldButtonClick(Sender: TObject);

begin

   HPDF.AutoLaunch := true;                                          // Show the PDF after it is created

   HPDF.FileName := '.\HelloWorld.pdf';

   HPDF.BeginDoc;                                                       // Start PDF generation

   HPDF.CurrentPage.TextOut(10, 10, 0, 'Hello World!');  // Write text on the first page

   HPDF.EndDoc;                                                         // Finalize and save the PDF

end;