Getting confused with this.render in the context of a controller (oops typo in the topic title, meant controller.render()).
My understanding was that on a controller, calling:
would create a new instance of the component of that xtype, and then add it to the render target of the controller as an item.
If it's not doing this, what does this.render do exactly? I've read somewhere that it's not compatible with a card layout. What if I need to use a card layout (am using a TabPanel) - how do I add items to that TabPanel from my controller if this.render doesn't do that?