/** Releases the mouse-selected node so that it readjusts in response to other node positions. */
public void dropSelected() {
if (!zoomer.isMouseCaptured()) {
if (selectedNode != null) {
nodes.get(selectedNode).makeFree();
selectedNode = null;
}
}
}
/** Allows a node to be selected with the mouse. */
public void selectNearestWithMouse() {
if (!zoomer.isMouseCaptured()) {
float mX = (zoomer.getMouseCoord().x - (width / 2)) / centroid.getZ() + centroid.getX();
float mY = (zoomer.getMouseCoord().y - (height / 2)) / centroid.getZ() + centroid.getY();
if (selectedNode == null) {
float nearestDSq = Float.MAX_VALUE;
for (Map.Entry<N, Particle> row : nodes.entrySet()) {
N node = row.getKey();
Particle p = row.getValue();
float px = p.position().x();
float py = p.position().y();
float dSq = (px - mX) * (px - mX) + (py - mY) * (py - mY);
if (dSq < nearestDSq) {
nearestDSq = dSq;
selectedNode = node;
}
}
}
}
}
