PDFViewer.php PDF viewer widget file. Tags copyright YetiForce S.A. license YetiForce Public License 6.5 (licenses/LicenseEN.txt or yetiforce.com) author Radosław Skrzypczak r.skrzypczak@yetiforce.com Interfaces, Classes, Traits and Enums Vtiger_PDFViewer_Widget PDF viewer class.