KeyEventListener.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package  org.turro.zkoss.grid;
 
import org.turro.elephant.util.Components;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.KeyEvent;
import org.zkoss.zul.Row;
 
public class KeyEventListener extends EditableEventListener {
 
  public KeyEventListener(EditableGrid grid) {
    super(grid);
  }
 
  @Override
  public void onEvent(Event event) throws Exception {
    Component comp = event.getTarget();
    Row row = Components.from(comp).parent(Row.class);
    KeyEvent kev = (KeyEvent) event;
    if(row != null) {
      if(kev.isCtrlKey()) {
        if(grid.isAllowDeletions() && kev.getKeyCode() == KeyEvent.DELETE) {
          grid.deleteSelectedRow(row);
        } else if(grid.isAllowInsertions() && kev.getKeyCode() == KeyEvent.INSERT) {
          grid.insertInSelectedRow(row);
        }
      } else {
        int cellIndex = row.getChildren().indexOf(comp);
        if(kev.getKeyCode() == KeyEvent.DOWN) {
          row = (Row) row.getNextSibling();
        } else if(kev.getKeyCode() == KeyEvent.UP) {
          row = (Row) row.getPreviousSibling();
        }
        if(row != null) {
          comp = (Component) row.getChildren().get(cellIndex);
        }
        if(comp == null) {
          if(grid.isAllowInsertions()) {
            row = grid.addNewRow();
          } else {
            row = (Row) grid.getRows().getFirstChild();
          }
          if(row != null) {
            comp = (Component) row.getChildren().get(cellIndex);
          }
        }
        if(row != null && comp != null) {
          grid.processEdition(new EditableCell(grid, row, comp));
        }
      }
    }
  }
 
}