~ubuntu-branches/ubuntu/oneiric/tuxguitar/oneiric

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

 

import org.herac.tuxguitar.gui.TuxGuitar;

import org.herac.tuxguitar.gui.editors.tab.Caret;

import org.herac.tuxguitar.gui.undo.CannotRedoException;

import org.herac.tuxguitar.gui.undo.CannotUndoException;

import org.herac.tuxguitar.gui.undo.UndoableEdit;

import org.herac.tuxguitar.gui.undo.undoables.UndoableCaretHelper;

import org.herac.tuxguitar.song.helpers.TGSongSegment;

import org.herac.tuxguitar.song.helpers.TGSongSegmentHelper;

 

public class UndoableInsertMeasure implements UndoableEdit{

        private int doAction;

        private UndoableCaretHelper undoCaret;

        private UndoableCaretHelper redoCaret;

        private TGSongSegment tracksMeasures;

        private long insertPosition;

        private int toTrack;

        private int copyCount;

        private int fromNumber;

        private long theMove;

        

        public UndoableInsertMeasure(int toTrack){

                Caret caret = getCaret();

                this.doAction = UNDO_ACTION;

                this.toTrack = toTrack;

                this.undoCaret = new UndoableCaretHelper();

                this.insertPosition = caret.getPosition();

        }

        

        public void redo() throws CannotRedoException {

                if(!canRedo()){

                        throw new CannotRedoException();

                }

                TGSongSegmentHelper helper = new TGSongSegmentHelper(TuxGuitar.instance().getSongManager());

                helper.insertMeasures(this.tracksMeasures.clone(TuxGuitar.instance().getSongManager().getFactory()),this.fromNumber,this.theMove,this.toTrack);

                TuxGuitar.instance().fireUpdate();

                this.redoCaret.update();

                

                this.doAction = UNDO_ACTION;

        }

        

        public void undo() throws CannotUndoException {

                if(!canUndo()){

                        throw new CannotUndoException();

                }

                for(int i = 0;i < this.copyCount;i ++){

                        TuxGuitar.instance().getSongManager().removeMeasure(this.insertPosition);

                }

                TuxGuitar.instance().fireUpdate();

                this.undoCaret.update();

                

                this.doAction = REDO_ACTION;

        }

        

        public boolean canRedo() {

                return (this.doAction == REDO_ACTION);

        }

        

        public boolean canUndo() {

                return (this.doAction == UNDO_ACTION);

        }

        

        public UndoableInsertMeasure endUndo(TGSongSegment tracksMeasures,int copyCount,int fromNumber,long theMove){

                this.redoCaret = new UndoableCaretHelper();

                this.copyCount = copyCount;

                this.tracksMeasures = tracksMeasures;

                this.fromNumber = fromNumber;

                this.theMove = theMove;

                return this;

        }

        

        private static Caret getCaret(){

                return TuxGuitar.instance().getTablatureEditor().getTablature().getCaret();

        }

        

}