Loading xi:include xml files from the program code

[davisjamesf]

I have been using the .earth file to organize annotations, features, labels etc. by storing them in different .xml files and loading them by using the <xi:include href="myData.xml"/> in the earth file.

I'd like to dynamically load and unload these same xml files in my c++ code instead of the .earth file by sending in the file name/location in as a function argument and appending a node to the earth node (or whatever is appropriate to add the child to).

Is this possible, and are there any examples I can follow? Thanks for your help.

[gwaldron]

I don't think there's a straight up example, but the steps would be something like:

• Use XmlDocument::load() to load the file
• Extract the Config object from the first XmlElement in the document by calling getConfig() on it
• Call Layer::create(config) to create your new map layer from the Config.

You can look at the code that processes <xi:include> for guidance, near XmlUtils.cpp:253
Hope this helps :)

[davisjamesf]

It was Layer::create(config) that was the missing piece of my puzzle. I'll try it out. Thanks!

[davisjamesf]

Here is the (very unpolished) code that worked for me. Hopefully it'll help someone else with the same question:

std::string layerfile = "myLayer.xml";
XmlDocument *doc = XmlDocument::load(layerfile);
XmlElement *el = static_cast<XmlElement*>(doc->getChildrent().front().get());
Config conf = static_cast<XmlElement*>(el)->getConfig(layerstr);
m_mapNode->getMap()->addLayer(Layer::create(conf));