GeoExtPrintForm - PrintProxy - print legend

[yvesm]

How can we add a legend to the printed output of PDFPrint ?

[jlacroix]

See the following ticket and example:
​http://trac.geoext.org/ticket/153#comment:4
​http://dev.geoext.org/trunk/geoext/examples/print-page.html

Some documentation:
​http://www.geoext.org/lib/GeoExt/data/PrintProvider.html

[yvesm]

Looks like we need an updated version of the print server and also we should begin using GeoExt's simple print widget : ​http://lists.mapfish.org/pipermail/users/2010-March/002665.html

[adube]

The print server shouldn't be part of GP, but I agree about using the simple print widget.

[yvesm]

I have updated the build instructions for the MapFish? print server : ​http://trac.osgeo.org/geoprisma/ticket/5#comment:10.

I have run this on geoprisma.org today and the new war has been deployed and tested, so we are ready to implement a legend in the print output.

[yvesm]

Replying to adube:

Right. The server is a separate piece but instructions are provided in GP to build and deploy it because we depend on it.

[adube]

Having a legend in the pdf printed is a feature often heard, so I'm setting this in 1.1.0.

[adube]

No patch, pushed to 1.4.

[adube]

Here's a summary of the work to do to accomplish this task.

GeoExtPrintForm

• add a check box with "include legend" in the widget
• have an option to hide it
• display it by default
• on print, add &osmprintlegend=true to the url

PrintProxy

The 'legends' spec will be entirely built by the server. When detecting the osmprintlegend parameter, browse the resources inside the spec and add getLegendGraphic icons for the WMS layers present (only those of wms service type).

Sample

We'll update an existing sample and make the changes accordingly to show that new feature.

[adube]

Instead of adding a checkbox to the GeoExtPrintForm widget, with the according "no" and "default" options, we'll simply use one "legend" boolean option, defaults to false (for backward compatibility and you need to setup a "legends" in mapfish print too).

[adube]

Fixed in r1368, featuring :

• PrintProxy : if it detects the osmprintlegend parameter set to true, all resources having a wms service in the spec will be added to the legends spec.
• GeoExtPrintForm new 'legend' option, defaults to false, to set the osmprintlegend parameter on print.
• GeoExtPrintForm small fix to alert an error message if something's wrong with the spec returned by MapFishPrint.
• sample updated
• documentation added