GroupManager.java :  » Natural-Language-Processing » Stanford-CoreNLP » com » jgraph » example » groupeditor » Java Open Source

package com.jgraph.example.groupeditor;

import java.awt.Component;
import java.awt.event.MouseEvent;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;

import javax.swing.event.MouseInputAdapter;

import org.jgraph.JGraph;
import org.jgraph.graph.CellView;

/**
 * Mananges the edition of the groups
 * @see com.jgraph.example.JGraphFoldingManager 
 */
public class GroupManager extends MouseInputAdapter {
  
  /**
   * Called when the mouse button is released to see if a collapse or expand
   * request has been made
   */
  public void mouseReleased(MouseEvent e) {
    if (e.getSource() instanceof JGraph) {
      final JGraph graph = (JGraph) e.getSource();
      getGroupByFoldingHandle(graph, e.getPoint());
      e.consume();
    }
  }

  /**
   * Called when the mouse button is released to see if a collapse or expand
   * request has been made
   */
  public static CellView getGroupByFoldingHandle(JGraph graph, Point2D pt) {
    CellView[] views = graph.getGraphLayoutCache().getCellViews();
    for (int i = 0; i < views.length; i++) {
      if (views[i].getBounds().contains(pt.getX(), pt.getY())) {
        Rectangle2D rectBounds = views[i].getBounds();
        Point2D containerPoint = graph.fromScreen((Point2D) pt.clone());
        containerPoint.setLocation(containerPoint.getX()
            - rectBounds.getX(), containerPoint.getY()
            - rectBounds.getY());
        Component renderer = views[i].getRendererComponent(graph,
            false, false, false);
        if (renderer instanceof EditableGroupRenderer) {
          Object[] list = {views[i].getCell()};
          graph.getGraphLayoutCache().toFront(list);
          graph.getGraphLayoutCache().refresh(views[i], false); 
          EditableGroupRenderer group = (EditableGroupRenderer) renderer;
          if (group.isEditAsked(containerPoint, rectBounds)) {
            graph.startEditingAtCell(views[i].getCell());
          }
        }
      }
    }
    return null;
  }

}