/**
* Determines whether a given control can have a specified layer added to it.
*
* @param control existing control
* @param lcmd specifies layer to add
* @return true iff <code>control.addLayer(lcmd)</code> will work
*/
private static boolean isCompatible(MultiFormLayerControl control, LayerCommand lcmd) {
/* Note the implementation of this method is closely tied to the
* implementation of MultiFormLayerControl.addLayer. */
/* Must have the same table data. */
if (lcmd.getTopcatModel() != control.getTopcatModel()) {
return false;
}
/* Must have the same positional coordinates.
* This test currently requires all the coordinates to be the same,
* I think that could be relaxed to just the positional ones. */
if (!lcmd.getInputValues()
.equals(GuiCoordContent.getInputValues(control.getPositionCoordPanel().getContents()))) {
return false;
}
/* Must have the same, single, subset. It could be possible
* under some circumstances to add to a gang control with
* multiple subsets, but the logic is tricky, so this is not
* currently supported by addLayer. */
RowSubset rset = lcmd.getRowSubset();
SubsetStack subStack = control.getSubsetStack();
if (!Arrays.equals(subStack.getSelectedSubsets(), new RowSubset[] {rset})) {
return false;
}
/* Any config options specified for the new layer must not conflict
* with config options (probably colour) currently in force for
* the new layer's subset. */
SubsetConfigManager subManager = control.getSubsetManager();
if (subManager.hasConfigger(rset)) {
ConfigMap ctrlConfig = subManager.getConfigger(rset).getConfig();
ConfigMap cmdConfig = lcmd.getConfig();
for (ConfigKey<?> key : cmdConfig.keySet()) {
if (ctrlConfig.keySet().contains(key)
&& !PlotUtil.equals(ctrlConfig.get(key), cmdConfig.get(key))) {
return false;
}
}
}
/* If it passes all those tests, it's compatible. */
return true;
}
