THPDFViewer Highlights and Marquee Selection

在不修改 PDF 的前提下标记页面区域，并把交互式选区转换回 PDF 页面坐标

声明

function THPDFViewerModel.AddHighlightRegion(PageIndex: Integer;
  const PageRect: THPDFRectangle; Color: TColor= clYellow): Integer;
function THPDFViewerModel.RemoveHighlightRegion(Index: Integer): boolean;
procedure THPDFViewerModel.ClearHighlightRegions;
function THPDFViewerModel.TryGetHighlightRegion(Index: Integer;
  out Highlight: THPDFViewerHighlight): boolean;

property THPDFViewer.InteractionMode: THPDFViewerInteractionMode;
property THPDFViewer.HighlightColor: TColor;
property THPDFViewer.OnMarqueeSelect: THPDFViewerMarqueeSelectEvent;

编程式高亮

Region.Left:= 72;
Region.Bottom:= 540;
Region.Right:= 240;
Region.Top:= 600;
HighlightIndex:= Viewer.HighlightRegion(0, Region, clLime);

交互式选择

Viewer.InteractionMode:= vimHighlight;
Viewer.HighlightColor:= clYellow;
Viewer.OnMarqueeSelect:= ViewerMarqueeSelect;

使用说明