Examples of com.mxgraph.view.mxGraph

com.mxgraph.view.mxGraph
Implements a graph object that allows to create diagrams from a graph model and stylesheet.
Images
To create an image from a graph, use the following code for a given XML document (doc) and File (file): Image img = mxCellRenderer.createBufferedImage( graph, null, 1, Color.WHITE, false, null); ImageIO.write(img, "png", file); If the XML is given as a string rather than a document, the document can be obtained using mxUtils.parse. This class fires the following events: mxEvent.ROOT fires if the root in the model has changed. This event has no properties. mxEvent.ALIGN_CELLS fires between begin- and endUpdate in alignCells. The cells and align properties contain the respective arguments that were passed to alignCells. mxEvent.FLIP_EDGE fires between begin- and endUpdate in flipEdge. The edge property contains the edge passed to flipEdge. mxEvent.ORDER_CELLS fires between begin- and endUpdate in orderCells. The cells and back properties contain the respective arguments that were passed to orderCells. mxEvent.CELLS_ORDERED fires between begin- and endUpdate in cellsOrdered. The cells and back arguments contain the respective arguments that were passed to cellsOrdered. mxEvent.GROUP_CELLS fires between begin- and endUpdate in groupCells. The group, cells and border arguments contain the respective arguments that were passed to groupCells. mxEvent.UNGROUP_CELLS fires between begin- and endUpdate in ungroupCells. The cells property contains the array of cells that was passed to ungroupCells. mxEvent.REMOVE_CELLS_FROM_PARENT fires between begin- and endUpdate in removeCellsFromParent. The cells property contains the array of cells that was passed to removeCellsFromParent. mxEvent.ADD_CELLS fires between begin- and endUpdate in addCells. The cells, parent, index, source and target properties contain the respective arguments that were passed to addCells. mxEvent.CELLS_ADDED fires between begin- and endUpdate in cellsAdded. The cells, parent, index, source, target and absolute properties contain the respective arguments that were passed to cellsAdded. mxEvent.REMOVE_CELLS fires between begin- and endUpdate in removeCells. The cells and includeEdges arguments contain the respective arguments that were passed to removeCells. mxEvent.CELLS_REMOVED fires between begin- and endUpdate in cellsRemoved. The cells argument contains the array of cells that was removed. mxEvent.SPLIT_EDGE fires between begin- and endUpdate in splitEdge. The edge property contains the edge to be splitted, the cells, newEdge, dx and dy properties contain the respective arguments that were passed to splitEdge. mxEvent.TOGGLE_CELLS fires between begin- and endUpdate in toggleCells. The show, cells and includeEdges properties contain the respective arguments that were passed to toggleCells. mxEvent.FOLD_CELLS fires between begin- and endUpdate in foldCells. The collapse, cells and recurse properties contain the respective arguments that were passed to foldCells. mxEvent.CELLS_FOLDED fires between begin- and endUpdate in cellsFolded. The collapse, cells and recurse properties contain the respective arguments that were passed to cellsFolded. mxEvent.UPDATE_CELL_SIZE fires between begin- and endUpdate in updateCellSize. The cell and ignoreChildren properties contain the respective arguments that were passed to updateCellSize. mxEvent.RESIZE_CELLS fires between begin- and endUpdate in resizeCells. The cells and bounds properties contain the respective arguments that were passed to resizeCells. mxEvent.CELLS_RESIZED fires between begin- and endUpdate in cellsResized. The cells and bounds properties contain the respective arguments that were passed to cellsResized. mxEvent.MOVE_CELLS fires between begin- and endUpdate in moveCells. The cells, dx, dy, clone, target and location properties contain the respective arguments that were passed to moveCells. mxEvent.CELLS_MOVED fires between begin- and endUpdate in cellsMoved. The cells, dx, dy and disconnect properties contain the respective arguments that were passed to cellsMoved. mxEvent.CONNECT_CELL fires between begin- and endUpdate in connectCell. The edge, terminal and source properties contain the respective arguments that were passed to connectCell. mxEvent.CELL_CONNECTED fires between begin- and endUpdate in cellConnected. The edge, terminal and source properties contain the respective arguments that were passed to cellConnected. mxEvent.REPAINT fires if a repaint was requested by calling repaint. The region property contains the optional mxRectangle that was passed to repaint to define the dirty region.

  /**
   * 
   */
  public void update(MouseEvent e, mxCellState targetState, double x, double y)
  {
    mxGraph graph = graphComponent.getGraph();
    mxICell cell = (mxICell) previewState.getCell();


    mxRectangle dirty = graphComponent.getGraph().getPaintBounds(
        new Object[] { previewState.getCell() });


    if (cell.getTerminal(false) != null)
    {
      cell.getTerminal(false).removeEdge(cell, false);
    }


    if (targetState != null)
    {
      ((mxICell) targetState.getCell()).insertEdge(cell, false);
    }


    mxGeometry geo = graph.getCellGeometry(previewState.getCell());


    geo.setTerminalPoint(startPoint, true);
    geo.setTerminalPoint(transformScreenPoint(x, y), false);


    revalidate(graph.getView().getState(graph.getDefaultParent()),
        previewState.getCell());
    fireEvent(new mxEventObject(mxEvent.CONTINUE, "event", e, "x", x, "y",
        y));


    // Repaints the dirty region

View Full Code Here

  /**
   * 
   */
  protected mxPoint transformScreenPoint(double x, double y)
  {
    mxGraph graph = graphComponent.getGraph();
    mxPoint tr = graph.getView().getTranslate();
    double scale = graph.getView().getScale();


    return new mxPoint(graph.snap(x / scale - tr.getX()), graph.snap(y / scale - tr.getY()));
  }

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  /**
   * 
   */
  public void revalidate(mxCellState pState, Object cell)
  {
    mxGraph graph = graphComponent.getGraph();
    mxCellState tmp = graph.getView().getState(cell);
    tmp.setInvalid(true);


    graph.getView().validateBounds(pState, cell);
    graph.getView().validatePoints(pState, cell);


    mxIGraphModel model = graph.getModel();
    int childCount = model.getChildCount(cell);


    for (int i = 0; i < childCount; i++)
    {
      revalidate(tmp, model.getChildAt(cell, i));

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  {
    Object result = (sourceState != null) ? sourceState.getCell() : null;


    if (previewState != null)
    {
      mxGraph graph = graphComponent.getGraph();


      graph.getModel().beginUpdate();
      try
      {
        mxICell cell = (mxICell) previewState.getCell();
        Object src = cell.getTerminal(true);
        Object trg = cell.getTerminal(false);


        if (src != null)
        {
          ((mxICell) src).removeEdge(cell, true);
        }


        if (trg != null)
        {
          ((mxICell) trg).removeEdge(cell, false);
        }


        if (commit)
        {
          result = graph.addCell(cell, null, null, src, trg);
        }


        fireEvent(new mxEventObject(mxEvent.STOP, "event", e, "commit",
            commit, "cell", (commit) ? result : null));


        // Clears the state before the model commits
        if (previewState != null)
        {
          Rectangle dirty = getDirtyRect();
          graph.getView().clear(cell, false, true);
          previewState = null;


          if (!commit && dirty != null)
          {
            graphComponent.getGraphControl().repaint(dirty);
          }
        }
      }
      finally
      {
        graph.getModel().endUpdate();
      }
    }


    sourceState = null;
    startPoint = null;

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  /**
   * 
   */
  public Object[] getCells(mxCellState initialState)
  {
    mxGraph graph = graphComponent.getGraph();


    return graph.getMovableCells(graph.getSelectionCells());
  }

View Full Code Here

  /**
   * Returns the states that are affected by the move operation.
   */
  protected mxCellState[] getPreviewStates()
  {
    mxGraph graph = graphComponent.getGraph();
    Collection<mxCellState> result = new LinkedList<mxCellState>();


    for (Object cell : movingCells)
    {
      mxCellState cellState = graph.getView().getState(cell);


      if (cellState != null)
      {
        result.add(cellState);


        // Terminates early if too many cells
        if (result.size() >= threshold)
        {
          return null;
        }


        if (isContextPreview())
        {
          Object[] edges = graph.getAllEdges(new Object[] { cell });


          for (Object edge : edges)
          {
            if (!graph.isCellSelected(edge))
            {
              mxCellState edgeState = graph.getView().getState(
                  edge);


              if (edgeState != null)
              {
                // Terminates early if too many cells

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  /**
   * 
   */
  protected mxRectangle getPlaceholderBounds(mxCellState startState)
  {
    mxGraph graph = graphComponent.getGraph();


    return graph.getView().getBounds(graph.getSelectionCells());
  }

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  /**
   * Sets the translation of the preview.
   */
  public void update(MouseEvent e, double dx, double dy, boolean clone)
  {
    mxGraph graph = graphComponent.getGraph();


    if (placeholder != null)
    {
      Rectangle tmp = new Rectangle(placeholder);
      placeholder.x = initialPlaceholder.x + (int) dx;
      placeholder.y = initialPlaceholder.x + (int) dy;
      tmp.add(placeholder);
      graphComponent.getGraphControl().repaint(tmp);
    }
    else if (previewStates != null)
    {
      preview = createCellStatePreview();
      preview.setOpacity(graphComponent.getPreviewAlpha());


      // Combines the layout result with the move preview
      for (mxCellState previewState : previewStates)
      {
        preview.moveState(previewState, dx, dy, false, false);


        // FIXME: Move into show-handler?
        boolean visible = true;


        if ((dx != 0 || dy != 0) && clone && isContextPreview())
        {
          visible = false;
          Object tmp = previewState.getCell();


          while (!visible && tmp != null)
          {
            visible = graph.isCellSelected(tmp);
            tmp = graph.getModel().getParent(tmp);
          }
        }
      }


      mxRectangle dirty = lastDirty;

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  /**
   * 
   */
  protected void reset()
  {
    mxGraph graph = graphComponent.getGraph();


    if (placeholder != null)
    {
      Rectangle tmp = placeholder;
      placeholder = null;
      graphComponent.getGraphControl().repaint(tmp);
    }


    if (isHideSelectionHandler())
    {
      graphComponent.getSelectionCellsHandler().setVisible(true);
    }


    // Revalidates the screen
    // TODO: Should only revalidate moved cells
    if (!isClonePreview() && previewStates != null)
    {
      graph.getView().revalidate();
    }


    previewStates = null;
    movingCells = null;
    startState = null;

View Full Code Here

      boolean clone, Object target)
  {
    Object[] cells = movingCells;
    reset();


    mxGraph graph = graphComponent.getGraph();
    graph.getModel().beginUpdate();
    try
    {
      if (commit)
      {
        double s = graph.getView().getScale();
        cells = graph.moveCells(cells, dx / s, dy / s, clone, target,
            e.getPoint());
      }


      fireEvent(new mxEventObject(mxEvent.STOP, "event", e, "commit",
          commit));
    }
    finally
    {
      graph.getModel().endUpdate();
    }


    return cells;
  }

View Full Code Here

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Examples of com.mxgraph.view.mxGraph

Images

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