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Viewing changes to src/org/herac/tuxguitar/gui/undo/undoables/measure/UndoableMeasureGeneric.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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src/org/herac/tuxguitar/gui/undo/undoables/measure/UndoableMeasureGeneric.java
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package org.herac.tuxguitar.gui.undo.undoables.measure;
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import org.herac.tuxguitar.gui.TuxGuitar;
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import org.herac.tuxguitar.gui.editors.tab.Caret;
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import org.herac.tuxguitar.gui.editors.tab.SongTrackCoords;
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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.Measure;
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import org.herac.tuxguitar.song.models.MeasureHeader;
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public class UndoableMeasureGeneric implements UndoableEdit{
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        private int doAction;
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        private int trackNumber;
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        private UndoableCaretHelper undoCaret;
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        private UndoableCaretHelper redoCaret;          
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        private Measure undoMeasure;
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        private Measure redoMeasure;
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        private UndoableMeasureGeneric(){
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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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                this.replace(this.redoMeasure); 
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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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                this.replace(this.undoMeasure);         
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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 (doAction == REDO_ACTION);
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    }
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    public boolean canUndo() {
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        return (doAction == UNDO_ACTION);
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    }
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    private void replace(Measure replace){
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                SongTrackCoords track = getCaret().getSongCoords().getTrack(trackNumber);    
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                if(track != null && replace != null){
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                        MeasureHeader header = TuxGuitar.instance().getSongManager().getMeasureHeader(replace.getNumber());
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                        Measure measure = (Measure)replace.clone(header);
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                        measure = TuxGuitar.instance().getSongManager().getTrackManager().replaceMeasure(track.getTrack(),measure);
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                        TuxGuitar.instance().getTablatureEditor().getTablature().getViewLayout().fireUpdate(measure.getNumber(),false);                         
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                }       
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    }
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    public static UndoableMeasureGeneric startUndo(){
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        UndoableMeasureGeneric undoable = new UndoableMeasureGeneric();
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        Caret caret = getCaret();               
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        undoable.doAction = UNDO_ACTION;
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        undoable.trackNumber = caret.getSongTrackCoords().getTrack().getNumber();
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        undoable.undoCaret = new UndoableCaretHelper();         
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        undoable.undoMeasure = (Measure)caret.getMeasureCoords().getMeasure().clone((MeasureHeader)caret.getMeasureCoords().getMeasure().getHeader().clone());                  
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        return undoable;
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    }
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    public UndoableMeasureGeneric endUndo(){    
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        Caret caret = getCaret(); 
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        this.redoCaret = new UndoableCaretHelper();
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        this.redoMeasure = (Measure)caret.getMeasureCoords().getMeasure().clone((MeasureHeader)caret.getMeasureCoords().getMeasure().getHeader().clone());      
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                return this;
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    }
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    private static Caret getCaret(){
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        return TuxGuitar.instance().getTablatureEditor().getTablature().getCaret();
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    }
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}