Use own Pdf viewer implementation. wip on universal InfoPanel

QuickLook.Plugin.PDFViewer/PageIdToImageConverter.cs

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+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace QuickLook.Plugin.PDFViewer
+{
+    public sealed class PageIdToImageConverter : IMultiValueConverter
+    {
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (values.Length < 2)
+                throw new Exception("PageIdToImageConverter");
+
+            var zoom = 0.5f;
+            if (parameter != null)
+                float.TryParse((string) parameter, out zoom);
+
+            var handle = values[0] as PdfFile;
+            if (handle == null) return null;
+
+            var pageId = (int) values[1];
+            if (pageId < 0) return null;
+
+            return handle.GetPage(pageId, zoom).ToBitmapSource();
+        }
+
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}