added wxPropertyGrid from Jaakko Salli (#9934)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55576 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/doxygen/mainpages/samples.h

@@ -107,6 +107,7 @@ TODO: Organize them in a more human-readable way.
 @li @sample{popup}
 @li @sample{power}
 @li @sample{printing}
+@li @sample{propgrid}
 </td><td>
 @li @sample{regtest}
 @li @sample{render}
@@ -688,6 +689,21 @@ commands through menu.
 
 @sampledir{printing}
 
+@section page_samples_propgrid wxPropertyGrid Sample
+
+Sample application has following additional examples of custom properties:
+- wxFontDataProperty ( edits wxFontData )
+- wxPointProperty ( edits wxPoint )
+- wxSizeProperty ( edits wxSize )
+- wxAdvImageFileProperty ( like wxImageFileProperty, but also has a drop-down
+  for recent image selection )
+- wxDirsProperty ( edits a wxArrayString consisting of directory strings)
+- wxArrayDoubleProperty ( edits wxArrayDouble )
+
+@sampleabout{wxPropertyGrid}
+
+@sampledir{propgrid}
+
 @section page_samples_regtest Registry Sample
 
 @sampleabout{wxRegKey}