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Viewing changes to TuxGuitar/src/org/herac/tuxguitar/gui/undo/undoables/custom/UndoableChangeMarker.java

  • Committer: Bazaar Package Importer
  • Author(s): Philippe Coval
  • Date: 2008-06-19 00:30:30 UTC
  • mto: (5.1.2 sid)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20080619003030-h719szrhsngou7c6
Tags: upstream-1.0
Import upstream version 1.0

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TuxGuitar/src/org/herac/tuxguitar/gui/undo/undoables/custom/UndoableChangeMarker.java
 
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package org.herac.tuxguitar.gui.undo.undoables.custom;
 
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import org.herac.tuxguitar.gui.TuxGuitar;
 
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import org.herac.tuxguitar.gui.marker.MarkerList;
 
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import org.herac.tuxguitar.gui.undo.CannotRedoException;
 
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import org.herac.tuxguitar.gui.undo.CannotUndoException;
 
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import org.herac.tuxguitar.gui.undo.UndoableEdit;
 
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import org.herac.tuxguitar.gui.undo.undoables.UndoableCaretHelper;
 
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import org.herac.tuxguitar.song.models.TGMarker;
 
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public class UndoableChangeMarker implements UndoableEdit{
 
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        private int doAction;
 
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        private UndoableCaretHelper undoCaret;
 
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        private UndoableCaretHelper redoCaret;
 
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        private TGMarker undoMarker;
 
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        private TGMarker redoMarker;
 
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        private UndoableChangeMarker(){
 
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                super();
 
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        }
 
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        public void redo() throws CannotRedoException {
 
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                if(!canRedo()){
 
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                        throw new CannotRedoException();
 
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                }
 
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                if(this.redoMarker != null){
 
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                        TuxGuitar.instance().getSongManager().updateMarker(this.redoMarker.clone(TuxGuitar.instance().getSongManager().getFactory()));
 
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                        MarkerList.instance().update(true);
 
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                }else if(this.undoMarker != null){
 
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                        TuxGuitar.instance().getSongManager().removeMarker(this.undoMarker.clone(TuxGuitar.instance().getSongManager().getFactory()));
 
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                        MarkerList.instance().update(false);
 
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                }
 
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                this.redoCaret.update();
 
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                this.doAction = UNDO_ACTION;
 
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        }
 
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        public void undo() throws CannotUndoException {
 
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                if(!canUndo()){
 
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                        throw new CannotUndoException();
 
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                }
 
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                if(this.undoMarker != null){
 
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                        TuxGuitar.instance().getSongManager().updateMarker(this.undoMarker.clone(TuxGuitar.instance().getSongManager().getFactory()));
 
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                        MarkerList.instance().update(true);
 
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                }else if(this.redoMarker != null){
 
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                        TuxGuitar.instance().getSongManager().removeMarker(this.redoMarker.clone(TuxGuitar.instance().getSongManager().getFactory()));
 
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                        MarkerList.instance().update(false);
 
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                }
 
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                this.undoCaret.update();
 
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                this.doAction = REDO_ACTION;
 
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        }
 
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        public boolean canRedo() {
 
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                return (this.doAction == REDO_ACTION);
 
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        }
 
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        public boolean canUndo() {
 
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                return (this.doAction == UNDO_ACTION);
 
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        }
 
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        public static UndoableChangeMarker startUndo(TGMarker marker){
 
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                UndoableChangeMarker undoable = new UndoableChangeMarker();
 
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                undoable.doAction = UNDO_ACTION;
 
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                undoable.undoCaret = new UndoableCaretHelper();
 
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                undoable.undoMarker = (marker == null)?null:(TGMarker)marker.clone(TuxGuitar.instance().getSongManager().getFactory());
 
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                return undoable;
 
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        }
 
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        public UndoableChangeMarker endUndo(TGMarker marker){
 
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                this.redoCaret = new UndoableCaretHelper();
 
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                this.redoMarker = (marker == null)?null:(TGMarker)marker.clone(TuxGuitar.instance().getSongManager().getFactory());
 
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                return this;
 
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        }
 
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}