/** Places a unit in the desired area. */
@Override
public void updateDOM(MapInfo mapInfo) {
// if we are not displayable, we exit, after remove the order (if
// it was created)
if (!GUIOrderUtils.isDisplayable(power, mapInfo)) {
removeFromDOM(mapInfo);
return;
}
// determine if any change has occured. If no change has occured,
// we will not change the DOM.
//
// we have nothing (yet) to check for change; isDependent() == false.
// so just return if we have not been drawn.
if (group != null) {
return;
}
// there has been a change, if we are at this point.
//
// if we've not yet been created, we will create; if we've
// already been created, we must remove the existing elements
// in our group
if (group == null) {
// create group
group =
(SVGGElement)
mapInfo
.getDocument()
.createElementNS(SVGDOMImplementation.SVG_NAMESPACE_URI, SVGConstants.SVG_G_TAG);
mapInfo.getPowerSVGGElement(power, LAYER_HIGHEST).appendChild(group);
} else {
// remove group children
GUIOrderUtils.deleteChildren(group);
}
// now, render the order
// (no highlight + shadow required here)
// no offset required
//
SVGElement[] elements = drawOrder(mapInfo);
for (int i = 0; i < elements.length; i++) {
group.appendChild(elements[i]);
}
// draw 'failed' marker, if appropriate.
if (!mapInfo.getTurnState().isOrderSuccessful(this)) {
SVGElement useElement = GUIOrderUtils.createFailedOrderSymbol(mapInfo, failPt.x, failPt.y);
group.appendChild(useElement);
}
} // updateDOM()
