Sorry, I forgot to attach the text files...
---------- Forwarded message ----------
From: Sunburned Surveyor <[EMAIL PROTECTED]>
Date: Dec 6, 2006 11:49 AM
Subject: Pluggable renderers for JUMP...
To: "List for discussion of JPP development and use."
<jump-pilot-devel@lists.sourceforge.net>
Cc: JUMP Developers <[EMAIL PROTECTED]>
I've done a little digging in the code and was able to track down the
changes made by Ole to allow "pluggable" renderers in OpenJUMP. He
basically changed to createRenderer() method of the RenderingMananger
class. It now looks up the appropriate Renderer to create for an
object based on its class name.
I have attached files showing the code for the createRenderer() method
in JUMP and OpenJUMP. I have also attached a text file with 2 new
methods added to the RenderingManager class by Ole to support this
functionality, the getRenderFactoryForLayerable() method and the
putRendererForLayerable() method.
I haven't gone over Ole's additions word by word, but I think I have a
pretty good understanding of what is going on here.
If Vivid Solutions is interested in supporting plugabble renderers I
can create a submission for the JUMP CVS for David or another Vivid
developer to review. I can even make some slight revisions to Ole's
code for Vivid's JUMP if some small changes need to be made.
The Sunburned Surveyor
protected Renderer createRenderer(Object contentID) {
if (contentID instanceof Layer) {
//[sstein] new
LayerRenderer lr = new LayerRenderer((Layer) contentID,
this.panel);
lr.setMaxFeatures(this.maxFeatures);
return lr;
//[sstein] old
//return new LayerRenderer((Layer) contentID, panel);
}
if (contentID instanceof WMSLayer) {
return new WMSLayerRenderer((WMSLayer) contentID,
panel);
}
//[sstein: 20.01.2006] Start: added by Ole
if(RenderingManager.getRenderFactoryForLayerable(contentID.getClass())!=null){
return
RenderingManager.getRenderFactoryForLayerable(contentID.getClass()).create(contentID);
}
//End: added by Ole*
if (contentIDToLowRendererFactoryMap.containsKey(contentID)) {
return ((Renderer.Factory)
contentIDToLowRendererFactoryMap
.get(contentID)).create();
}
if (contentIDToHighRendererFactoryMap.containsKey(contentID)) {
return ((Renderer.Factory)
contentIDToHighRendererFactoryMap
.get(contentID)).create();
}
Assert.shouldNeverReachHere(contentID.toString());
return null;
}
protected Renderer createRenderer(Object contentID) {
if (contentID instanceof Layer) {
return new LayerRenderer((Layer) contentID, panel);
}
if (contentID instanceof WMSLayer) {
return new WMSLayerRenderer((WMSLayer) contentID,
panel);
}
if (contentIDToLowRendererFactoryMap.containsKey(contentID)) {
return ((Renderer.Factory)
contentIDToLowRendererFactoryMap
.get(contentID)).create();
}
if (contentIDToHighRendererFactoryMap.containsKey(contentID)) {
return ((Renderer.Factory)
contentIDToHighRendererFactoryMap
.get(contentID)).create();
}
Assert.shouldNeverReachHere(contentID.toString());
return null;
}
//[sstein: 20.01.2006]
// Start: added by Ole
// everything is static to make it useable before a LayerManager
instance
// (containing a RenderingManager) is created
// which is the case, at the time the PlugIns are initialized and to
have one map
// for all RenderingManager
public static Renderer.ContentDependendFactory
getRenderFactoryForLayerable(Class clss){
if (layerableClassToRendererFactoryMap.containsKey(clss)){
return
(Renderer.ContentDependendFactory)layerableClassToRendererFactoryMap.get(clss);
}
return null;
}
public static void putRendererForLayerable(Class clss,
Renderer.ContentDependendFactory rendererFactory) {
if (!layerableClassToRendererFactoryMap.containsKey(clss)) {
layerableClassToRendererFactoryMap.put(clss,
rendererFactory);
}
}
// End: added by Ole*
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