DecrementDurationAction.java

/*
 * Created on 17-dic-2005
 * 
 * TODO To change the template for this generated file go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
package org.herac.tuxguitar.gui.actions.duration;

import org.eclipse.swt.events.TypedEvent;
import org.herac.tuxguitar.gui.TuxGuitar;
import org.herac.tuxguitar.gui.actions.Action;
import org.herac.tuxguitar.gui.editors.tab.Caret;
import org.herac.tuxguitar.gui.undo.undoables.measure.UndoableMeasureGeneric;
import org.herac.tuxguitar.song.models.TGDuration;

/**
 * @author julian
 * 
 *         TODO To change the template for this generated type comment go to
 *         Window - Preferences - Java - Code Style - Code Templates
 */
public class DecrementDurationAction extends Action {
  public static final String NAME = "action.note.duration.decrement-duration";

  public DecrementDurationAction() {
    super(NAME, AUTO_LOCK | AUTO_UNLOCK | AUTO_UPDATE | DISABLE_ON_PLAYING
        | KEY_BINDING_AVAILABLE);
  }

  private void changeDuration(int value) {
    Caret caret = getEditor().getTablature().getCaret();
    caret.getDuration().setValue(value);
    caret.getDuration().setDotted(false);
    caret.getDuration().setDoubleDotted(false);
    caret.changeDuration(caret.getDuration().clone());
  }

  @Override
  protected int execute(TypedEvent e) {
    TGDuration duration = getEditor().getTablature().getCaret().getDuration();
    if (duration.getValue() > TGDuration.WHOLE) {
      // comienza el undoable
      UndoableMeasureGeneric undoable = UndoableMeasureGeneric.startUndo();

      this.changeDuration(duration.getValue() / 2);

      TuxGuitar.instance().getFileHistory().setUnsavedFile();
      this.updateTablature();

      // termia el undoable
      addUndoableEdit(undoable.endUndo());
    }

    return 0;
  }

  @Override
  public void updateTablature() {
    fireUpdate(getEditor().getTablature().getCaret().getMeasure().getNumber());
  }
}