In Eclipse, just highlight the reference you are interested in (in this case
render), right click and choose References->Project. This will display all
of the places in the project that reference your highlighted text in a
Search panel that you can arrow through. It understands Java, so it is much
better than simply doing a word search.
Larry
On 4/12/07, Sunburned Surveyor <[EMAIL PROTECTED]> wrote:
O.K.
I think I've narrowed down my NullPointerException problem, but I still
need some help with a complete fix. I am able to properly render a layer
when loading a new dataset in OpenJUMP with my pluggable rendering system
enabled.
However, when I try to zoom or pan the data in the LayerViewPanel I get a
NullPointerException. I also get this exception when I start OpenJUMP and an
emptyLayerViewPanel is displayed.
By default my pluggable rendering system only supports rendering
com.vividsolutions.jump.workbench.model.Layer objects and
com.vividsolutions.jump.model.WMSLayer objects. I thought I only needed to
include renderers for these two classes by default. I'm beginning to suspect
that another object is passed to the render() method of the RenderingManager
object. This would explain the NullPointerException. My pluggable rendering
system would return null for any object that was passed to the
RenderingManager.render() method that wasn't a Layer object or WMSLayer
object.
What other types of objects are passed to the RenderingManager.render()
method? I almost think we are passing a reference to the LayerViewPanel
itself. What else would need to get painted when OpenJUMP starts and an
empty LayerViewPanel is displayed?
This problem has me really stumped. I appreciate everyone's patience with
my efforts on this. I think the benefits of a pluggable rendering system
will be worth it.
If you can tell me what other classes might get passed to the
RenderingManager.render() method when OpenJUMP first loads, or when a
viewport is panned, I would appreciate it. Or, tell me how I could find out.
:]
The Sunburned Surveyor
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