UndoableCaretHelper.java

package org.herac.tuxguitar.gui.undo.undoables;

import org.herac.tuxguitar.gui.TuxGuitar;
import org.herac.tuxguitar.gui.editors.tab.Caret;
import org.herac.tuxguitar.song.models.TGDuration;
import org.herac.tuxguitar.song.models.TGString;

public class UndoableCaretHelper {
  private static Caret getCaret() {
    return TuxGuitar.instance().getTablatureEditor().getTablature().getCaret();
  }

  private TGDuration duration;
  private long position;
  private int string;
  private int track;

  private int velocity;

  public UndoableCaretHelper() {
    Caret caret = getCaret();
    this.track = caret.getTrack().getNumber();
    this.position = caret.getPosition();
    this.velocity = caret.getVelocity();
    this.duration = caret.getDuration().clone();
    this.string = 1;
    TGString instrumentString = caret.getSelectedString();
    if (instrumentString != null) {
      this.string = instrumentString.getNumber();
    }
  }

  public void update() {
    getCaret().update(this.track, this.position, this.string, this.velocity);
    getCaret().setSelectedDuration(this.duration.clone());
  }

}