// TileAction.java

package kmt;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.beans.*;
      
     // An action that tiles all internal frames when requested.
public class TileAction extends AbstractAction {
  private JDesktopPane desk; // the desktop to work with
      
  public TileAction(JDesktopPane desk) {
    super("Tile Frames");
    this.desk = desk;
  }
      
  public void actionPerformed(ActionEvent ev) {
      
    // How many frames do we have?
    JInternalFrame[] allframes = desk.getAllFrames();
    int count = allframes.length;
    if (count == 0) return;
      
    // Determine the necessary grid size
    int sqrt = (int)Math.sqrt(count);
    int rows = sqrt;
    int cols = sqrt;
    if (rows*cols < count) {
      cols++;
      if (rows*cols < count) {
	rows++;
      }
    }
      
    // Define some initial values for size & location
    Dimension size = desk.getSize();
      
    int w = size.width/cols;
    int h = size.height/rows;
    int x = 0;
    int y = 0;
      
    // Iterate over the frames, deiconifying any iconified frames and then
    // relocating & resizing each
    for (int i=0; i<rows; i++) {
      for (int j=0; j<cols && ((i*cols)+j<count); j++) {
	JInternalFrame f = allframes[(i*cols)+j];
      
	if ((f.isClosed() == false) && (f.isIcon() == true)) {

	  try {
	    f.setIcon(false);
	  }
	  catch (PropertyVetoException ex) {}
	}
      
	desk.getDesktopManager().resizeFrame(f, x, y, w, h);
	x += w;
      }
      y += h; // start the next row
      x = 0;
    }
  }
}