/**
* Ensures that the field <code>row/column</code> shows <code>figure</code>.
*
* @param row the row of the field
* @param column the column of the field
* @param figure the figure to show, can be <code>null</code> if the field should be cleared.
*/
public void put(int row, int column, ChessFigure figure) {
Field field = fields[row][column];
ChessFigure old = field.getFigure();
if (old != null) {
for (DockStationListener listener : listListeners()) listener.dockableRemoving(this, old);
field.set(null);
old.setDockParent(null);
for (DockStationListener listener : listListeners()) listener.dockableRemoved(this, old);
}
if (figure != null) {
Field oldField = getFieldOf(figure);
if (oldField == null) {
for (DockStationListener listener : listListeners()) listener.dockableAdding(this, figure);
field.set(figure);
figure.setDockParent(this);
for (DockStationListener listener : listListeners()) listener.dockableAdded(this, figure);
} else {
field.transfer(oldField);
if (!board.isEmpty(oldField.getRow(), oldField.getColumn())) {
board.move(oldField.getRow(), oldField.getColumn(), row, column);
Figure pawn = board.pawnReplacement();
if (pawn != null) {
pawn = pawnReplaceDialog.replace(pawn);
board.put(pawn);
figure.setFigure(pawn);
}
board.switchPlayer();
}
}
}
}
/**
* Gets the field which shows <code>figure</code>.
*
* @param figure the figure whose field is searched
* @return the field or <code>null</code> if nothing was found
*/
private Field getFieldOf(Dockable figure) {
for (Field field : usedFieldList) if (field.getFigure() == figure) return field;
return null;
}