graphdisplaypanel.java

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// $Id: GraphDisplayPanel.java,v 1.2 2003/10/07 21:46:05 idgay Exp $

/*									tab:4
 * "Copyright (c) 2000-2003 The Regents of the University  of California.  
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */


/**
 * @author Wei Hong
 * @author modified for tinydb
 */

//*******************************************************
//*******************************************************
//This class is essentially a JPanel with the paint() function overridden
//IT cycles through the nodes, edges, nodePainters, edgePainters, and screenPainters
//and tells them all to draw on its graphics object
//Then I add some code for scaling and zooming the screen
//and converting from node coordinates to screen coordinates
//*******************************************************
//*******************************************************

package net.tinyos.surge;

import net.tinyos.surge.util.*;
import javax.swing.*;
import java.beans.*;
import java.awt.*;
import java.util.*;

public class GraphDisplayPanel extends javax.swing.JPanel
{
  //the following are member variables needed only for painting
  protected Image doubleBufferImage;
  protected Dimension doubleBufferImageSize;
  protected Graphics doubleBufferGraphic;
  protected boolean fitToScreenAutomatically = false;

  //the following are needed for scaling and zooming
  protected double xScale=534;
  protected double xScaleIntercept = -101;
  protected double yScale = 534;
  protected double yScaleIntercept=-65;
  protected double xMargin=10, yMargin=10;//value of 10 -> margin width of 10% of the screensize
  protected boolean screenIsEmpty=true;


  public GraphDisplayPanel()
  {
    //{{INIT_CONTROLS
    setLayout(null);
    Insets ins = getInsets();
    setSize(ins.left + ins.right + 430,ins.top + ins.bottom + 270);
    //}}

    //{{REGISTER_LISTENERS
    //}}
  }

  //----------------------------------------------------------------
  //PAINT
  //recall that paint() is called the first time the window
  //needs to be drawn, or if something damages the window,
  //and in this case by RefreshScreenNow()
  public void paint(Graphics g)
  {
    super.paint(g);//first paint the panel normally

    //the following block of code is used
    //if this is the first time being drawn or if the window was resized
    //Otherwise we don't creat a new buffer
    Dimension d = getSize();

    if ((doubleBufferImage == null) || (d.width != doubleBufferImageSize.width) || (d.height != doubleBufferImageSize.height))//if this is the first time being drawn or if the window was resized
    {
      doubleBufferImage = createImage(d.width, d.height);
      doubleBufferImageSize = d;
      if (doubleBufferGraphic != null) {
	doubleBufferGraphic.dispose();
      }
      doubleBufferGraphic = doubleBufferImage.getGraphics();
      doubleBufferGraphic.setFont(getFont());
    }

    doubleBufferGraphic.setColor(Color.white);
    doubleBufferGraphic.fillRect(0, 0, d.width, d.height);

    if( (fitToScreenAutomatically) || (screenIsEmpty)) 
    {     //if the user wants all the nodes on the screen, or if these are the first nodes on the screen, fit all nodes to the visible area
      //FitToScreen();
      ;
    }

    //draw things on the screen before any nodes or edges appear
    MainClass.displayManager.PaintUnderScreen(doubleBufferGraphic);

    //draw all the nodes
    DisplayManager.NodeInfo nodeDisplayInfo;
    int xCoord, yCoord, imageWidth, imageHeight;
    for(Enumeration nodes = MainClass.displayManager.GetNodeInfo(); nodes.hasMoreElements();) 
    {
      nodeDisplayInfo = (DisplayManager.NodeInfo)nodes.nextElement();
      //figure out where to put the node on the screen
      xCoord = ScaleNodeXCoordToScreenCoord(MainClass.locationAnalyzer.GetX(nodeDisplayInfo.GetNodeNumber()));
      yCoord = ScaleNodeYCoordToScreenCoord(MainClass.locationAnalyzer.GetY(nodeDisplayInfo.GetNodeNumber()));
      //if that spot is not on the visible area, don't draw it at all
      if(	(xCoord > this.getSize().getWidth()) ||
	  (yCoord > this.getSize().getHeight()))
      {
	continue;
      }

      // MDW: Don't scale size of dots
      //imageWidth = (int)Math.max(20,xScale*nodeDisplayInfo.GetImageWidth()/100);
      //imageHeight = (int)Math.max(20,yScale*nodeDisplayInfo.GetImageHeight()/100);
      imageWidth = imageHeight = 20;
      MainClass.displayManager.PaintAllNodes(nodeDisplayInfo.GetNodeNumber(), xCoord-imageWidth/2, yCoord-imageHeight/2, xCoord+imageWidth/2, yCoord+imageHeight/2, doubleBufferGraphic);



    }

    //draw all the edges
    DisplayManager.EdgeInfo edgeDisplayInfo;
    for(Enumeration edges = MainClass.displayManager.GetEdgeInfo(); edges.hasMoreElements();) 
    {
      edgeDisplayInfo = (DisplayManager.EdgeInfo)edges.nextElement();
      //figure out the coordinates of the endpoints of the edge
      int x1 = ScaleNodeXCoordToScreenCoord(MainClass.locationAnalyzer.GetX(edgeDisplayInfo.GetSourceNodeNumber()));
      int y1 = ScaleNodeYCoordToScreenCoord(MainClass.locationAnalyzer.GetY(edgeDisplayInfo.GetSourceNodeNumber()));
      int x2 = ScaleNodeXCoordToScreenCoord(MainClass.locationAnalyzer.GetX(edgeDisplayInfo.GetDestinationNodeNumber()));
      int y2 = ScaleNodeYCoordToScreenCoord(MainClass.locationAnalyzer.GetY(edgeDisplayInfo.GetDestinationNodeNumber()));

      //		edgeDisplayInfo.paint(doubleBufferGraphic);
      MainClass.displayManager.PaintAllEdges(edgeDisplayInfo.GetSourceNodeNumber(), edgeDisplayInfo.GetDestinationNodeNumber(), x1, y1, x2, y2, doubleBufferGraphic);
    }

    //draw things over the entire display
    MainClass.displayManager.PaintOverScreen(doubleBufferGraphic);

    //Make everything that was drawn visible
    g.drawImage(doubleBufferImage, 0, 0, null);

  }
  //END OF PAINT
  //----------------------------------------------------------------

  public void update(Graphics g)
  {
    paint(g);
  }

  public void repaint(Graphics g)
  {
    paint(g);
  }


  //*******************************************************
  //*******************************************************
  //the following code sets X and Y scaling factors for 
  //the X and Y coordinates of the nodes 
  //*******************************************************
  //the norm is to set scaling factors to keep everything
  //on the screen.  However, if the user attempts to zoom
  //the scaling factors can be larger and will be held 
  //constant
  //*******************************************************
  //*******************************************************



  //----------------------------------------------------------------
  //FIT TO SCREEN
  //this function will set the scaling factors above such
  //that all nodes are scaled to within the screen viewing area
  public void FitToScreen() //do not synchronize
  {
    double largestXCoord = Double.MIN_VALUE;
    double smallestXCoord = Double.MAX_VALUE;
    double largestYCoord = Double.MIN_VALUE;
    double smallestYCoord = Double.MAX_VALUE;
    double x, y;
    //find the largest and smallest coords for all nodes
    DisplayManager.NodeInfo currentDisplayInfo;
    for(Enumeration nodes = MainClass.displayManager.GetNodeInfo(); nodes.hasMoreElements();) 
    {
      currentDisplayInfo = (DisplayManager.NodeInfo)nodes.nextElement();
      if(screenIsEmpty){currentDisplayInfo.SetFitOnScreen(true);}
      if( ((currentDisplayInfo.GetDisplayThisNode() == true) && (currentDisplayInfo.GetFitOnScreen() == true) ))//If the current node is displayed and old enough, or if they are the first nodes to be drawn
      {
	x = MainClass.locationAnalyzer.GetX(currentDisplayInfo.GetNodeNumber());
	y = MainClass.locationAnalyzer.GetY(currentDisplayInfo.GetNodeNumber());
	if(x > largestXCoord) {largestXCoord = x;}
	if(x < smallestXCoord){smallestXCoord = x;}
	if(y > largestYCoord){largestYCoord = y;}
	if(y < smallestYCoord){smallestYCoord = y;}
      }
    }	
    //here we use the following equations to set the scaling factors:
    // xScale*SmallestXCoord + XIntercept = 0
    // xScale*LargestXCoord  + XIntercept = window.width();
    //
    //And the same for the y scaling factors.  
    //Note that I want a border of <Margin>% of the screen on both sides

    Dimension d = getSize();

    xScale = (d.width-2*(d.width/xMargin))/(largestXCoord - smallestXCoord);
    yScale = (d.height-2*(d.height/yMargin))/(largestYCoord - smallestYCoord);

    xScale = Math.min(xScale, yScale);//this is to make sure that the x and y coordinates are not warped
    yScale = xScale;

    xScaleIntercept = -xScale*smallestXCoord + d.width/xMargin;
    yScaleIntercept = -yScale*smallestYCoord + d.height/yMargin;
    screenIsEmpty = false;
    if(MainClass.displayManager.proprietaryNodeInfo.isEmpty())//if there are no nodes and none of this function was executed
    {
      screenIsEmpty = true;
      xScale = 1;
      yScale = 1;
      xScaleIntercept = 0;
      yScaleIntercept = 0;
    }
    //System.out.println(xScale + " " + yScale);
    //System.out.println(xScaleIntercept + " " + yScaleIntercept);
  }

  public int ScaleNodeXCoordToScreenCoord(double pXCoord)//do not synchronize
  {         //take the local coordinate system of the nodes and show it as a graphical coordinate system
    Double xCoord = new Double(xScale*pXCoord+xScaleIntercept);
    return xCoord.intValue();
  }

  public int ScaleNodeYCoordToScreenCoord(double pYCoord)       //do not synchronize
  {         //take the local coordinate system of the nodes and show it as a graphical coordinate system
    Double yCoord = new Double(yScale*pYCoord+yScaleIntercept);
    return yCoord.intValue();
  }

  public Double ScaleScreenXCoordToNodeCoord(double pXCoord)//do not synchronize
  {         //take a graphical coordinate system and show it as the local coordinate system of the nodes 
    return new Double((pXCoord-xScaleIntercept)/xScale);
  }

  public Double ScaleScreenYCoordToNodeCoord(double pYCoord)       //do not synchronize
  {         //take a graphical coordinate system and show it as the local coordinate system of the nodes 
    return new Double((pYCoord-yScaleIntercept)/yScale);
  }

  //------------------------------------------------------------------
  //GET/SET
  public boolean GetFitToScreenAutomatically(){return fitToScreenAutomatically;}
  public void SetFitToScreenAutomatically(boolean p){fitToScreenAutomatically=p;}
  public double GetXScale(){return xScale;}
  public double GetYScale(){return yScale;}
  //GET/SET
  //------------------------------------------------------------------

  //{{DECLARE_CONTROLS
  //}}

}