Examples of com.mxgraph.swing.mxGraphComponent

com.mxgraph.swing.mxGraphComponent
For setting the preferred size of the viewport for scrolling, use mxGraph.setMinimumGraphSize. This component is a combined scrollpane with an inner mxGraphControl. The control contains the actual graph display. To set the background color of the graph, use the following code:
```
 graphComponent.getViewport().setOpaque(true); graphComponent.getViewport().setBackground(newColor); 
```
This class fires the following events: mxEvent.START_EDITING fires before starting the in-place editor for an existing cell in startEditingAtCell. The cell property contains the cell that is being edit and the event property contains optional EventObject which was passed to startEditingAtCell. mxEvent.LABEL_CHANGED fires between begin- and endUpdate after the call to mxGraph.cellLabelChanged in labelChanged. The cell property contains the cell, the value property contains the new value for the cell and the optional event property contains the EventObject that started the edit. mxEvent.ADD_OVERLAY and mxEvent.REMOVE_OVERLAY fire afer an overlay was added or removed using add-/removeOverlay. The cell property contains the cell for which the overlay was added or removed and the overlay property contain the mxOverlay. mxEvent.BEFORE_PAINT and mxEvent.AFTER_PAINT fire before and after the paint method is called on the component. The g property contains the graphics context which is used for painting.

    {
      graph.getModel().endUpdate();
    }


    // Overrides method to create the editing value
    mxGraphComponent graphComponent = new mxGraphComponent(graph)
    {
      /**
       * 
       */
      private static final long serialVersionUID = 6824440535661529806L;


      public String getEditingValue(Object cell, EventObject trigger)
      {
        if (cell instanceof mxCell)
        {
          Object value = ((mxCell) cell).getValue();


          if (value instanceof Element)
          {
            Element elt = (Element) value;


            if (elt.getTagName().equalsIgnoreCase("person"))
            {
              String firstName = elt.getAttribute("firstName");
              String lastName = elt.getAttribute("lastName");


              return firstName + " " + lastName;
            }
          }
        }


        return super.getEditingValue(cell, trigger);
      };


    };
    
    getContentPane().add(graphComponent);
    
    // Stops editing after enter has been pressed instead
    // of adding a newline to the current editing value
    graphComponent.setEnterStopsCellEditing(true);
  }

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    finally
    {
      graph.getModel().endUpdate();
    }


    mxGraphComponent graphComponent = new mxGraphComponent(graph);
    getContentPane().add(graphComponent);
  }

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    finally
    {
       graph.getModel().endUpdate();
    }
    
    final mxGraphComponent graphComponent = new mxGraphComponent(graph);
    getContentPane().add(graphComponent);
    
    graphComponent.getGraphControl().addMouseListener(new MouseAdapter()
    {
    
      public void mouseReleased(MouseEvent e)
      {
        Object cell = graphComponent.getCellAt(e.getX(), e.getY());
        
        if (cell != null)
        {
          System.out.println("cell="+graph.getLabel(cell));
        }

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        "Target Must Have 1 Source", "Target Must Connect From Source",
        true);


    graph.setMultiplicities(multiplicities);


    final mxGraphComponent graphComponent = new mxGraphComponent(graph);
    graph.setMultigraph(false);
    graph.setAllowDanglingEdges(false);
    graphComponent.setConnectable(true);
    graphComponent.setToolTips(true);


    // Enables rubberband selection
    new mxRubberband(graphComponent);
    new mxKeyboardHandler(graphComponent);


    // Installs automatic validation (use editor.validation = true
    // if you are using an mxEditor instance)
    graph.getModel().addListener(mxEvent.CHANGE, new mxIEventListener()
    {
      public void invoke(Object sender, mxEventObject evt)
      {
        graphComponent.validateGraph();
      }
    });


    // Initial validation
    graphComponent.validateGraph();


    getContentPane().add(graphComponent);
  }

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  private static final long serialVersionUID = 6776304509649205465L;


  @SuppressWarnings("serial")
  public SchemaEditorMenuBar(final BasicGraphEditor editor)
  {
    final mxGraphComponent graphComponent = editor.getGraphComponent();
    final mxGraph graph = graphComponent.getGraph();
    JMenu menu = null;
    JMenu submenu = null;


    // Creates the file menu
    menu = add(new JMenu(mxResources.get("file")));


    menu.add(editor.bind(mxResources.get("new"), new NewAction(),
        "/com/mxgraph/examples/swing/images/new.gif"));
    menu.add(editor.bind(mxResources.get("openFile"), new OpenAction(),
        "/com/mxgraph/examples/swing/images/open.gif"));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("save"), new SaveAction(false),
        "/com/mxgraph/examples/swing/images/save.gif"));
    menu.add(editor.bind(mxResources.get("saveAs"), new SaveAction(true),
        "/com/mxgraph/examples/swing/images/saveas.gif"));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("pageSetup"),
        new PageSetupAction(),
        "/com/mxgraph/examples/swing/images/pagesetup.gif"));
    menu.add(editor.bind(mxResources.get("print"), new PrintAction(),
        "/com/mxgraph/examples/swing/images/print.gif"));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("exit"), new ExitAction()));


    // Creates the edit menu
    menu = add(new JMenu(mxResources.get("edit")));


    menu.add(editor.bind(mxResources.get("undo"), new HistoryAction(true),
        "/com/mxgraph/examples/swing/images/undo.gif"));
    menu.add(editor.bind(mxResources.get("redo"), new HistoryAction(false),
        "/com/mxgraph/examples/swing/images/redo.gif"));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("cut"), TransferHandler
        .getCutAction(), "/com/mxgraph/examples/swing/images/cut.gif"));
    menu.add(editor
        .bind(mxResources.get("copy"), TransferHandler.getCopyAction(),
            "/com/mxgraph/examples/swing/images/copy.gif"));
    menu.add(editor.bind(mxResources.get("paste"), TransferHandler
        .getPasteAction(),
        "/com/mxgraph/examples/swing/images/paste.gif"));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("delete"), mxGraphActions
        .getDeleteAction(),
        "/com/mxgraph/examples/swing/images/delete.gif"));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("selectAll"), mxGraphActions
        .getSelectAllAction()));
    menu.add(editor.bind(mxResources.get("selectNone"), mxGraphActions
        .getSelectNoneAction()));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("warning"), new WarningAction()));
    menu.add(editor.bind(mxResources.get("edit"), mxGraphActions
        .getEditAction()));


    // Creates the view menu
    menu = add(new JMenu(mxResources.get("view")));


    JMenuItem item = menu.add(new TogglePropertyItem(graphComponent,
        mxResources.get("pageLayout"), "PageVisible", true,
        new ActionListener()
        {
          /**
           * 
           */
          public void actionPerformed(ActionEvent e)
          {
            if (graphComponent.isPageVisible()
                && graphComponent.isCenterPage())
            {
              graphComponent.zoomAndCenter();
            }
          }
        }));


    item.addActionListener(new ActionListener()
    {
      /*
       * (non-Javadoc)
       * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
       */
      public void actionPerformed(ActionEvent e)
      {
        if (e.getSource() instanceof TogglePropertyItem)
        {
          final mxGraphComponent graphComponent = editor
              .getGraphComponent();
          TogglePropertyItem toggleItem = (TogglePropertyItem) e
              .getSource();


          if (toggleItem.isSelected())
          {
            // Scrolls the view to the center
            SwingUtilities.invokeLater(new Runnable()
            {
              /*
               * (non-Javadoc)
               * @see java.lang.Runnable#run()
               */
              public void run()
              {
                graphComponent.scrollToCenter(true);
                graphComponent.scrollToCenter(false);
              }
            });
          }
          else
          {
            // Resets the translation of the view
            mxPoint tr = graphComponent.getGraph().getView()
                .getTranslate();


            if (tr.getX() != 0 || tr.getY() != 0)
            {
              graphComponent.getGraph().getView().setTranslate(
                  new mxPoint());
            }
          }
        }
      }
    });


    menu.add(new TogglePropertyItem(graphComponent, mxResources
        .get("antialias"), "AntiAlias", true));


    menu.addSeparator();


    menu.add(new ToggleGridItem(editor, mxResources.get("grid")));
    menu.add(new ToggleRulersItem(editor, mxResources.get("rulers")));


    menu.addSeparator();


    submenu = (JMenu) menu.add(new JMenu(mxResources.get("zoom")));


    submenu.add(editor.bind("400%", new ScaleAction(4)));
    submenu.add(editor.bind("200%", new ScaleAction(2)));
    submenu.add(editor.bind("150%", new ScaleAction(1.5)));
    submenu.add(editor.bind("100%", new ScaleAction(1)));
    submenu.add(editor.bind("75%", new ScaleAction(0.75)));
    submenu.add(editor.bind("50%", new ScaleAction(0.5)));


    submenu.addSeparator();


    submenu.add(editor.bind(mxResources.get("custom"), new ScaleAction(0)));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("zoomIn"), mxGraphActions
        .getZoomInAction()));
    menu.add(editor.bind(mxResources.get("zoomOut"), mxGraphActions
        .getZoomOutAction()));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("page"), new ZoomPolicyAction(
        mxGraphComponent.ZOOM_POLICY_PAGE)));
    menu.add(editor.bind(mxResources.get("width"), new ZoomPolicyAction(
        mxGraphComponent.ZOOM_POLICY_WIDTH)));


    menu.addSeparator();


    menu.add(editor.bind(mxResources.get("actualSize"), mxGraphActions
        .getZoomActualAction()));


    // Creates the diagram menu
    menu = add(new JMenu(mxResources.get("diagram")));


    menu.add(new ToggleOutlineItem(editor, mxResources.get("outline")));


    menu.addSeparator();


    submenu = (JMenu) menu.add(new JMenu(mxResources.get("background")));


    submenu.add(editor.bind(mxResources.get("backgroundColor"),
        new BackgroundAction()));
    submenu.add(editor.bind(mxResources.get("backgroundImage"),
        new BackgroundImageAction()));


    submenu.addSeparator();


    submenu.add(editor.bind(mxResources.get("pageBackground"),
        new PageBackgroundAction()));


    submenu = (JMenu) menu.add(new JMenu(mxResources.get("grid")));


    submenu.add(editor.bind(mxResources.get("gridSize"),
        new PromptPropertyAction(graph, "Grid Size", "GridSize")));
    submenu.add(editor.bind(mxResources.get("gridColor"),
        new GridColorAction()));


    submenu.addSeparator();


    submenu.add(editor.bind(mxResources.get("dashed"), new GridStyleAction(
        mxGraphComponent.GRID_STYLE_DASHED)));
    submenu.add(editor.bind(mxResources.get("dot"), new GridStyleAction(
        mxGraphComponent.GRID_STYLE_DOT)));
    submenu.add(editor.bind(mxResources.get("line"), new GridStyleAction(
        mxGraphComponent.GRID_STYLE_LINE)));
    submenu.add(editor.bind(mxResources.get("cross"), new GridStyleAction(
        mxGraphComponent.GRID_STYLE_CROSS)));


    menu.addSeparator();


    submenu = (JMenu) menu.add(new JMenu(mxResources.get("layout")));


    submenu.add(editor.graphLayout("verticalHierarchical", true));
    submenu.add(editor.graphLayout("horizontalHierarchical", true));


    submenu.addSeparator();


    submenu.add(editor.graphLayout("verticalPartition", false));
    submenu.add(editor.graphLayout("horizontalPartition", false));


    submenu.addSeparator();


    submenu.add(editor.graphLayout("verticalStack", false));
    submenu.add(editor.graphLayout("horizontalStack", false));


    submenu.addSeparator();


    submenu.add(editor.graphLayout("verticalTree", true));
    submenu.add(editor.graphLayout("horizontalTree", true));


    submenu.addSeparator();


    submenu.add(editor.graphLayout("parallelEdges", false));


    submenu.addSeparator();


    submenu.add(editor.graphLayout("organicLayout", true));


    submenu = (JMenu) menu.add(new JMenu(mxResources.get("selection")));


    submenu.add(editor.bind(mxResources.get("selectPath"),
        new SelectShortestPathAction(false)));
    submenu.add(editor.bind(mxResources.get("selectDirectedPath"),
        new SelectShortestPathAction(true)));


    submenu.addSeparator();


    submenu.add(editor.bind(mxResources.get("selectTree"),
        new SelectSpanningTreeAction(false)));
    submenu.add(editor.bind(mxResources.get("selectDirectedTree"),
        new SelectSpanningTreeAction(true)));


    menu.addSeparator();


    submenu = (JMenu) menu.add(new JMenu(mxResources.get("stylesheet")));


    submenu
        .add(editor
            .bind(
                mxResources.get("basicStyle"),
                new StylesheetAction(
                    "/com/mxgraph/examples/swing/resources/basic-style.xml")));
    submenu
        .add(editor
            .bind(
                mxResources.get("defaultStyle"),
                new StylesheetAction(
                    "/com/mxgraph/examples/swing/resources/default-style.xml")));


    // Creates the options menu
    menu = add(new JMenu(mxResources.get("options")));


    submenu = (JMenu) menu.add(new JMenu(mxResources.get("display")));
    submenu.add(new TogglePropertyItem(graphComponent, mxResources
        .get("buffering"), "TripleBuffered", true));
    submenu.add(editor.bind(mxResources.get("dirty"),
        new ToggleDirtyAction()));


    submenu.addSeparator();


    item = submenu.add(new TogglePropertyItem(graphComponent, mxResources
        .get("centerPage"), "CenterPage", true, new ActionListener()
    {
      /**
       * 
       */
      public void actionPerformed(ActionEvent e)
      {
        if (graphComponent.isPageVisible()
            && graphComponent.isCenterPage())
        {
          graphComponent.zoomAndCenter();
        }
      }
    }));


    submenu.add(new TogglePropertyItem(graphComponent, mxResources

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     * Saves XML+PNG format.
     */
    protected void saveXmlPng(BasicGraphEditor editor, String filename,
        Color bg) throws IOException
    {
      mxGraphComponent graphComponent = editor.getGraphComponent();
      mxGraph graph = graphComponent.getGraph();


      // Creates the image for the PNG file
      BufferedImage image = mxCellRenderer.createBufferedImage(graph,
          null, 1, bg, graphComponent.isAntiAlias(), null,
          graphComponent.getCanvas());


      // Creates the URL-encoded XML data
      mxCodec codec = new mxCodec();
      String xml = URLEncoder.encode(
          mxXmlUtils.getXml(codec.encode(graph.getModel())), "UTF-8");

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    {
      BasicGraphEditor editor = getEditor(e);


      if (editor != null)
      {
        mxGraphComponent graphComponent = editor.getGraphComponent();
        mxGraph graph = graphComponent.getGraph();
        FileFilter selectedFilter = null;
        DefaultFileFilter xmlPngFilter = new DefaultFileFilter(".png",
            "PNG+XML " + mxResources.get("file") + " (.png)");
        FileFilter vmlFileFilter = new DefaultFileFilter(".html",
            "VML " + mxResources.get("file") + " (.html)");
        String filename = null;
        boolean dialogShown = false;


        if (showDialog || editor.getCurrentFile() == null)
        {
          String wd;


          if (lastDir != null)
          {
            wd = lastDir;
          }
          else if (editor.getCurrentFile() != null)
          {
            wd = editor.getCurrentFile().getParent();
          }
          else
          {
            wd = System.getProperty("user.dir");
          }


          JFileChooser fc = new JFileChooser(wd);


          // Adds the default file format
          FileFilter defaultFilter = xmlPngFilter;
          fc.addChoosableFileFilter(defaultFilter);


          // Adds special vector graphics formats and HTML
          fc.addChoosableFileFilter(new DefaultFileFilter(".mxe",
              "mxGraph Editor " + mxResources.get("file")
                  + " (.mxe)"));
          fc.addChoosableFileFilter(new DefaultFileFilter(".txt",
              "Graph Drawing " + mxResources.get("file")
                  + " (.txt)"));
          fc.addChoosableFileFilter(new DefaultFileFilter(".svg",
              "SVG " + mxResources.get("file") + " (.svg)"));
          fc.addChoosableFileFilter(vmlFileFilter);
          fc.addChoosableFileFilter(new DefaultFileFilter(".html",
              "HTML " + mxResources.get("file") + " (.html)"));


          // Adds a filter for each supported image format
          Object[] imageFormats = ImageIO.getReaderFormatNames();


          // Finds all distinct extensions
          HashSet<String> formats = new HashSet<String>();


          for (int i = 0; i < imageFormats.length; i++)
          {
            String ext = imageFormats[i].toString().toLowerCase();
            formats.add(ext);
          }


          imageFormats = formats.toArray();


          for (int i = 0; i < imageFormats.length; i++)
          {
            String ext = imageFormats[i].toString();
            fc.addChoosableFileFilter(new DefaultFileFilter("."
                + ext, ext.toUpperCase() + " "
                + mxResources.get("file") + " (." + ext + ")"));
          }


          // Adds filter that accepts all supported image formats
          fc.addChoosableFileFilter(new DefaultFileFilter.ImageFileFilter(
              mxResources.get("allImages")));
          fc.setFileFilter(defaultFilter);
          int rc = fc.showDialog(null, mxResources.get("save"));
          dialogShown = true;


          if (rc != JFileChooser.APPROVE_OPTION)
          {
            return;
          }
          else
          {
            lastDir = fc.getSelectedFile().getParent();
          }


          filename = fc.getSelectedFile().getAbsolutePath();
          selectedFilter = fc.getFileFilter();


          if (selectedFilter instanceof DefaultFileFilter)
          {
            String ext = ((DefaultFileFilter) selectedFilter)
                .getExtension();


            if (!filename.toLowerCase().endsWith(ext))
            {
              filename += ext;
            }
          }


          if (new File(filename).exists()
              && JOptionPane.showConfirmDialog(graphComponent,
                  mxResources.get("overwriteExistingFile")) != JOptionPane.YES_OPTION)
          {
            return;
          }
        }
        else
        {
          filename = editor.getCurrentFile().getAbsolutePath();
        }


        try
        {
          String ext = filename
              .substring(filename.lastIndexOf('.') + 1);


          if (ext.equalsIgnoreCase("svg"))
          {
            mxSvgCanvas canvas = (mxSvgCanvas) mxCellRenderer
                .drawCells(graph, null, 1, null,
                    new CanvasFactory()
                    {
                      public mxICanvas createCanvas(
                          int width, int height)
                      {
                        mxSvgCanvas canvas = new mxSvgCanvas(
                            mxDomUtils.createSvgDocument(
                                width, height));
                        canvas.setEmbedded(true);


                        return canvas;
                      }


                    });


            mxUtils.writeFile(mxXmlUtils.getXml(canvas.getDocument()),
                filename);
          }
          else if (selectedFilter == vmlFileFilter)
          {
            mxUtils.writeFile(mxXmlUtils.getXml(mxCellRenderer
                .createVmlDocument(graph, null, 1, null, null)
                .getDocumentElement()), filename);
          }
          else if (ext.equalsIgnoreCase("html"))
          {
            mxUtils.writeFile(mxXmlUtils.getXml(mxCellRenderer
                .createHtmlDocument(graph, null, 1, null, null)
                .getDocumentElement()), filename);
          }
          else if (ext.equalsIgnoreCase("mxe")
              || ext.equalsIgnoreCase("xml"))
          {
            mxCodec codec = new mxCodec();
            String xml = mxXmlUtils.getXml(codec.encode(graph
                .getModel()));


            mxUtils.writeFile(xml, filename);


            editor.setModified(false);
            editor.setCurrentFile(new File(filename));
          }
          else if (ext.equalsIgnoreCase("txt"))
          {
            String content = mxGdCodec.encode(graph);


            mxUtils.writeFile(content, filename);
          }
          else
          {
            Color bg = null;


            if ((!ext.equalsIgnoreCase("gif") && !ext
                .equalsIgnoreCase("png"))
                || JOptionPane.showConfirmDialog(
                    graphComponent, mxResources
                        .get("transparentBackground")) != JOptionPane.YES_OPTION)
            {
              bg = graphComponent.getBackground();
            }


            if (selectedFilter == xmlPngFilter
                || (editor.getCurrentFile() != null
                    && ext.equalsIgnoreCase("png") && !dialogShown))
            {
              saveXmlPng(editor, filename, bg);
            }
            else
            {
              BufferedImage image = mxCellRenderer
                  .createBufferedImage(graph, null, 1, bg,
                      graphComponent.isAntiAlias(), null,
                      graphComponent.getCanvas());


              if (image != null)
              {
                ImageIO.write(image, ext, new File(filename));
              }

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     */
    public void actionPerformed(ActionEvent e)
    {
      if (e.getSource() instanceof mxGraphComponent)
      {
        mxGraphComponent graphComponent = (mxGraphComponent) e
            .getSource();
        mxGraph graph = graphComponent.getGraph();
        mxIGraphModel model = graph.getModel();


        Object source = null;
        Object target = null;

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     */
    public void actionPerformed(ActionEvent e)
    {
      if (e.getSource() instanceof mxGraphComponent)
      {
        mxGraphComponent graphComponent = (mxGraphComponent) e
            .getSource();
        mxGraph graph = graphComponent.getGraph();
        mxIGraphModel model = graph.getModel();


        Object parent = graph.getDefaultParent();
        Object[] cells = graph.getSelectionCells();

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     */
    public void actionPerformed(ActionEvent e)
    {
      if (e.getSource() instanceof mxGraphComponent)
      {
        mxGraphComponent graphComponent = (mxGraphComponent) e
            .getSource();
        graphComponent.showDirtyRectangle = !graphComponent.showDirtyRectangle;
      }
    }

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