Added a readme file explaining how to ensure the plugins are in

QT4's search path so they appear in designer


git-svn-id: http://svn.osgeo.org/qgis/trunk@5134 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: timlinux

src/designer/README.txt

@@ -0,0 +1,35 @@
+Notes on the useage of the QGIS custom designer plugins
+
+                 Tim Sutton, 2006
+--------------------------------------------------------
+
+Introduction:
+
+The purpose of the QGIS designer plugins is to all third
+party developers to create GIS enabled QT4 based applications
+with minimal programming. The idea being that you use the 
+standard Qt4 Designer GUI design tool to create your user
+interface and then add map canvas, legend, projection selector
+etc. type of widgets from the toolbox of widgets in designer
+- with QGIS having added its own group of custome widgets there.
+The QGIS custom widgets can then be graphically 'programmed' by
+setting widget properties and using interactive signal/slot 
+connectors.
+
+Plugin Paths:
+
+There are two options for having Qt4 Designer find your
+plugins at startup:
+
+1) copy the plugin from {QGIS Install Prefix}/lib/qgis/designer
+   into the standard Qt4 designer plugin directory at 
+   $QTDIR/plugins/designer/
+
+2) export the environment variable QT_PLUGIN_PATH with all the
+   places designer should look for your plugins in. Separate
+   each entry with a colon. So for example:
+   
+   export QT_PLUGIN_PATH={QGIS Install Prefix}/lib/qgis
+
+   Note that the 'designer' directory is ommitted from the path.
+