source: trunk/src/org/expeditee/items/MagneticConstraint/Actions/NextItemAction.java@ 1102

package org.expeditee.items.MagneticConstraint.Actions;

import org.expeditee.gui.DisplayController;
import org.expeditee.items.Item;
import org.expeditee.items.Text;
import org.expeditee.items.MagneticConstraint.MagneticConstraintAction;
import org.expeditee.items.MagneticConstraint.MagneticConstraints;
import org.expeditee.items.MagneticConstraint.Utilities.Line;

public class NextItemAction extends MagneticConstraintAction {

        @Override
        public boolean exec(final Item item) {
                if(item.getParent() == null || !this.isSpIDERCodePage(item.getParent())) return false;
                final int idRight = item.getMagnetizedItemRight();
                final int idBottom = item.getMagnetizedItemBottom();
                if(idRight != -1) {
                        moveCursor(item.getParent().getItemWithID(idRight));
                        MagneticConstraints.Log(this.getClass(), new Item[]{item, item.getParent().getItemWithID(idRight)}, 
                                        Line.getLineContainingToken(item).toArray(new Item[]{}), 
                                        "NextItemAction does not move any items around.  Only moves the cursor.  Right neighbor found; second primary.");
                        return true;
                } else if(idBottom != -1) {
                        moveCursor(item.getParent().getItemWithID(idBottom));
                        MagneticConstraints.Log(this.getClass(), new Item[]{item, item.getParent().getItemWithID(idBottom)}, 
                                        Line.getLineContainingToken(item).toArray(new Item[]{}), 
                                        "NextItemAction does not move any items around.  Only moves the cursor.  Bottom neighbor found; second primary.");
                        return true;
                } else return false;
        }
        
        private boolean moveCursor(final Item toMoveTo) {
                if (toMoveTo == null)
                        return false;
                //System.err.println("Next item requests move to item with text: " + toMoveTo.getText());
                DisplayController.setTextCursor((Text)toMoveTo, Text.HOME);
                return true;
        }

        @Override
        public boolean invert(Item item) {
                System.err.println("Next item action does not have a inverted implementation.");
                return false;
        }
}