/**
* Creates a list of the visible layers in Z-Order, the layer with the lowest Z-Order first, layer
* with the highest Z-Order last.
*
* @return a list of the visible in Z-Order, the layer with the lowest Z-Order first, layer with
* the highest Z-Order last.
*/
public List<Layer> getVisibleLayersInZOrder() {
layerLock.readLock().lock();
try {
List<Layer> ret = new ArrayList<>();
for (Layer l : layers) {
if (l.isVisible()) {
ret.add(l);
}
}
// sort according to position in the list of layers, with one exception:
// an active data layer always becomes a higher Z-Order than all other data layers
Collections.sort(
ret,
new Comparator<Layer>() {
@Override
public int compare(Layer l1, Layer l2) {
if (l1 instanceof OsmDataLayer && l2 instanceof OsmDataLayer) {
if (l1 == getActiveLayer()) return -1;
if (l2 == getActiveLayer()) return 1;
return Integer.compare(layers.indexOf(l1), layers.indexOf(l2));
} else return Integer.compare(layers.indexOf(l1), layers.indexOf(l2));
}
});
Collections.reverse(ret);
return ret;
} finally {
layerLock.readLock().unlock();
}
}
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getPropertyName().equals(Layer.VISIBLE_PROP)) {
repaint();
} else if (evt.getPropertyName().equals(Layer.OPACITY_PROP)) {
Layer l = (Layer) evt.getSource();
if (l.isVisible()) {
changedLayer = l;
repaint();
}
} else if (evt.getPropertyName().equals(OsmDataLayer.REQUIRES_SAVE_TO_DISK_PROP)
|| evt.getPropertyName().equals(OsmDataLayer.REQUIRES_UPLOAD_TO_SERVER_PROP)) {
OsmDataLayer layer = (OsmDataLayer) evt.getSource();
if (layer == getEditLayer()) {
refreshTitle();
}
}
}