/*

 * To change this template, choose Tools | Templates

 * and open the template in the editor.

 */

package javaapplication1;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;



/**

 *

 * @author xtass

 */

public class CircleLayoutTest {

    public static void main(String args[]){

        EventQueue.invokeLater(new Runnable(){

            public void run(){

                CircleLayoutFrame frame=new CircleLayoutFrame();

                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                frame.setVisible(true);

            }

        });

    }

}



/**

 * A frame that shows buttons arranged along a circle

 */

class CircleLayoutFrame extends JFrame{

    public CircleLayoutFrame(){

        setTitle("CircleLayoutTest");

        

        setLayout(new CircleLayout());

        add(new JButton("Yellow"));

        add(new JButton("Blue"));

        add(new JButton("Red"));

        add(new JButton("Green"));

        add(new JButton("Orange"));

        add(new JButton("Fuchsia"));

        add(new JButton("Indigo"));

        pack();

    }





/**

 * A layout manager that lays out components along a circle

 */

class CircleLayout implements LayoutManager

{

    public void addLayoutComponents(String name,Component comp){

    }

    

    public void removeLayoutComponents(Component comp){

    }

    

    public void setSizes(Container parent){

        if(sizesSet) return;

        int n=parent.getComponentCount();

        

        preferredWidth=0;

        preferredHeight=0;

        minWidth=0;

        minHeight=0;

        maxComponentWidth=0;

        maxComponentHeight=0;

        

        //compute the maxium component widths and heights

        //and set the preferred size to the sum of the component sizes.

        for(int i=0;i<n;i++){

            Component c=parent.getComponent(i);

            if(c.isVisible()){

                Dimension d=c.getPreferredSize();

                maxComponentWidth=Math.max(maxComponentWidth,d.width);

                maxComponentHeight=Math.max(maxComponentHeight,d.height);

                preferredWidth+=d.width;

                preferredHeight+=d.height;

            }

        }

        minWidth=preferredWidth/2;

        minHeight=preferredHeight/2;

        sizesSet=true;

    }

    

    public Dimension preferredLayoutSize(Container parent){

        setSizes(parent);

        Insets insets=parent.getInsets();

        int width=preferredWidth+insets.left+insets.right;

        int height=preferredHeight+insets.top+insets.bottom;