clocklayout.java

This is Layout manager for java using swing.

package com.jhlabs.awt;

import java.awt.*;

public class ClockLayout extends ConstraintLayout {

	public ClockLayout() {
	}
	
	public void measureLayout(Container target, Dimension dimension, int type)  {
		int count = target.getComponentCount();
		if (count > 0) {
			Insets insets = target.getInsets();
			Dimension size = target.getSize();
			int x = 0;
			int y = 0;
			int maxWidth = 0;
			int maxHeight = 0;
			double radius = Math.min(size.width-insets.left-insets.right, size.height-insets.top-insets.bottom) / 2;

			Dimension[] sizes = new Dimension[count];

			for (int i = 0; i < count; i++) {
				Component c = target.getComponent(i);
				if (includeComponent(c)) {
					Dimension d = getComponentSize(c, type);
					int w = d.width;
					int h = d.height;
					sizes[i] = d;

					maxWidth = Math.max(maxWidth, w);
					maxHeight = Math.max(maxHeight, h);
				}
			}

			if (dimension != null) {
				dimension.width = (int)(2*radius-maxWidth);
				dimension.height = (int)(2*radius-maxHeight);
			} else {
				int mx = (size.width-insets.left-insets.right-2*hMargin)/2;
				int my = (size.height-insets.top-insets.bottom-2*vMargin)/2;
				x = 0;
				y = 0;
				
				radius -= Math.max(maxWidth, maxHeight)/2;
				for (int i = 0; i < count; i++) {
					Component c = target.getComponent(i);
					if (includeComponent(c)) {
						Dimension d = sizes[i];
						int w = d.width;
						int h = d.height;
				
						double angle = 2 * Math.PI * i / count;
						x = mx + (int)(Math.sin(angle) * radius);
						y = my - (int)(Math.cos(angle) * radius);
						c.setBounds(insets.left+hMargin+x-w/2, insets.top+vMargin+y-h/2, w, h);
					}
				}
			}
		}

	}

}