Coordinate Systems in PDF Viewer
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The PDF Viewer for WPF uses the following coordinate systems:
#Client Coordinate System
The PDF Viewer control uses the client coordinates (measured in pixels) to specify the points’ position. This coordinate system’s starting point is at the top-left corner of the PDF Viewer’s client area. Refer to the Windows Forms Coordinates article for more details.
#Page Coordinate System
The page coordinate system’s starting point (0,0) is the left-bottom corner of a page. The Y axis is directed from the bottom of the page to the top.
The page coordinate system uses points (1/72 of an inch) as a measurement unit.
#Use Coordinate Systems in API
The table below lists methods that work with client and page coordinates, and methods used to convert one coordinate type into another.
Use Client Coordinates | Use Page Coordinates | Convert Coordinates |
---|---|---|
Convert client coordinates to page coordinates when you need to determine what page was clicked in a document. Refer to the How to: Determine the Page Number of a Clicked Page example for more information.
Tip
You can use the Pdf