[Gvsig_english] Issue with layer position when creating new layers
Flavio Pompermaier
fla83tn at gmail.com
Wed May 5 11:46:39 CEST 2010
Hi to all,
I'm using gvSIG 1.9 revision 1253 and I have some trouble whit layer
positioning.
I have a list of layer to add on login and, if this layer is not
present, I want to add it on the bottom of the toc and not on top as
default.
However, if I use Flayers.addLayer(0, layer) it is not added at the
bottom of the toc..
This is the code I use in my project (a simplified version):
// 1 store layer position before addition
for (MyLayer workLayer : workLayers) {
String layerName = workLayer.getLayerNameI();
int position = getLayerPostion(flayers, layerName);
if (position >= 0) {
layerPositions.put(layerName, position);
}
}
//2 remove layer to add if present and then add
for (MyLayer workLayer : workLayers) {
String layerName = workLayer.getLayerNameI();
/remove layer if it already exists
FLayer alreadyExistingLayer = flayers.getLayer(layerName);
if (alreadyExistingLayer != null) {
flayers.removeLayer(alreadyExistingLayer);
}
//and substitute with the new generated one
flayers.addLayer(createLayerInView(workLayer, projection));
log.debug("Layer substituted: " + workLayer.getServiceLayerName());
}
// 3 reorder as before removing/adding (point 2)
int numLayers = flayers.getLayersCount() - 1;
for (MyLayer workLayer : workLayers) {
String layerName = workLayer.getLayerNameI();
Integer oldPosition = layerPositions.get(layerName);
int currentPosition = getLayerPostion(flayers, layerName);
if (oldPosition != null) {
flayers.moveTo(numLayers - currentPosition, numLayers -
oldPosition.intValue());
}
}
and the function getLayerPostion():
private static int getLayerPostion(FLayers flayers, String layerName) {
for (int i = 0; i < flayers.getLayersCount(); i++) {
if (layerName.equals(flayers.getLayer(i).getName()))
return i;
}
return -1;
}
Any help?
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