~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.TracksMeasures;

 

public class UndoableInsertMeasure implements UndoableEdit{

        private int doAction;

        private UndoableCaretHelper undoCaret;

        private UndoableCaretHelper redoCaret;          

        private TracksMeasures tracksMeasures;

        private long insertPosition;

        private int copyCount;

        private int fromNumber;

        private long theMove;

 

        public UndoableInsertMeasure(){

        Caret caret = getCaret();               

        this.doAction = UNDO_ACTION;

        this.undoCaret = new UndoableCaretHelper();         

        this.insertPosition = caret.getPosition();

        }       

        

        public void redo() throws CannotRedoException { 

                if(!canRedo()){

                        throw new CannotRedoException();

                } 

                TuxGuitar.instance().getSongManager().insertMeasures((TracksMeasures)tracksMeasures.clone(),fromNumber,theMove);

                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(insertPosition);

                }

                TuxGuitar.instance().fireUpdate();

                this.undoCaret.update();

                

                this.doAction = REDO_ACTION;

        }

 

    public boolean canRedo() {

        return (doAction == REDO_ACTION);

    }

 

    public boolean canUndo() {

        return (doAction == UNDO_ACTION);

    }

 

    public UndoableInsertMeasure endUndo(TracksMeasures 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();

    }  

 

}