private synchronized void updateChildren() {
// Collect all current mask layers
LayerFilter layerFilter =
layer -> {
PropertySet conf = layer.getConfiguration();
return conf.isPropertyDefined(MaskLayerType.PROPERTY_NAME_MASK)
&& conf.getValue(MaskLayerType.PROPERTY_NAME_MASK) != null;
};
List<Layer> maskLayers =
LayerUtils.getChildLayers(
LayerUtils.getRootLayer(this), LayerUtils.SEARCH_DEEP, layerFilter);
HashMap<Mask, Layer> currentLayers = new HashMap<>();
for (Layer maskLayer : maskLayers) {
Mask mask = maskLayer.getConfiguration().getValue(MaskLayerType.PROPERTY_NAME_MASK);
currentLayers.put(mask, maskLayer);
}
// Allign mask layers with available masks
if (raster != null && getProduct() != null) {
Mask[] availableMasks = getProduct().getMaskGroup().toArray(new Mask[0]);
HashSet<Layer> unusedLayers = new HashSet<>(maskLayers);
for (Mask availableMask : availableMasks) {
// todo add all mask layers as soon as the masks have been scaled to fit the raster
if (raster.getRasterSize().equals(availableMask.getRasterSize())) {
Layer layer = currentLayers.get(availableMask);
if (layer != null) {
unusedLayers.remove(layer);
} else {
layer = createLayer(availableMask);
getChildren().add(layer);
}
layer.setVisible(raster.getOverlayMaskGroup().contains(availableMask));
}
}
// Remove unused layers
for (Layer layer : unusedLayers) {
layer.dispose();
Layer layerParent = layer.getParent();
if (layerParent != null) {
layerParent.getChildren().remove(layer);
}
}
}
}
@Override
public void handleLayerPropertyChanged(Layer layer, PropertyChangeEvent event) {
if ("visible".equals(event.getPropertyName())) {
final Object value = layer.getConfiguration().getValue("mask");
if (value instanceof Mask) {
Mask mask = (Mask) value;
final ProductNodeGroup<Mask> overlayMaskGroup = getRaster().getOverlayMaskGroup();
if (layer.isVisible()) {
if (!overlayMaskGroup.contains(mask)) {
overlayMaskGroup.add(mask);
}
} else {
overlayMaskGroup.remove(mask);
}
}
}
}