//
// WhiteSSCell.java
//

/*
You can get the DisplayImpl from a BasicSSCell (a spreadsheet cell)
by calling BasicSSCell.getDisplay().  However, whenever a BasicSSCell
switches dimensions, a new DisplayImpl must be initialized.  So, the
best way to ensure the spreadsheet always has cells with white
backgrounds is to make a simple extension.

Below is an extension of visad.ss.FancySSCell that does the trick.
*/

import java.io.*;
import java.awt.Frame;
import java.rmi.*;
import visad.*;
import visad.formula.*;
import visad.ss.*;

/** An extension of visad.ss.FancySSCell for cells with white backgrounds. */
public class WhiteSSCell extends FancySSCell {

  /** Extended from visad.ss.FancySSCell. */
  public WhiteSSCell(String name, FormulaManager fman, RemoteServer rs,
    boolean slave, String save, Frame parent) throws VisADException,
    RemoteException
  {
    super(name, fman, rs, slave, save, parent);
  }

  /**
   * Extends visad.ss.FancySSCell.constructDisplay so that whenever a
   * new DisplayImpl is constructed, its background is set to white.
   */
  public synchronized boolean constructDisplay() {
    boolean success = super.constructDisplay();
    if (success) {
      DisplayRenderer dRenderer = VDisplay.getDisplayRenderer();
      try {
        // set background color
        dRenderer.setBackgroundColor(1.0f, 1.0f, 1.0f); // white
        dRenderer.setBoxColor(0.0f, 0.0f, 0.0f); // black
      }
      catch (VisADException exc) { exc.printStackTrace(); }
      catch (RemoteException exc) { exc.printStackTrace(); }
    }
    return success;
  }

  public static void main(String[] args) {
    SpreadSheet.setSSCellClass(WhiteSSCell.class);
    SpreadSheet.main(args);
  }

}