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Код: Выделить всё

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Код: Выделить всё

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.JCheckBoxMenuItem;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.border.AbstractBorder;
import javax.swing.plaf.basic.BasicInternalFrameUI;

public class Frames extends JFrame implements ActionListener {

	private static final long serialVersionUID = 1L;

	JInternalFrame left, top, right, bottom, main;
	JCheckBoxMenuItem leftMenuItem, rightMenuItem, topMenuItem, bottomMenuItem;

	public Frames() {
		super();

		setDefaultCloseOperation(EXIT_ON_CLOSE);

		setJMenuBar(createMenuBar());

		JDesktopPane desktop = new JDesktopPane();
		desktop.setLayout(new BorderLayout());

		setContentPane(desktop);

		createInternalFrames();
		add(main, BorderLayout.CENTER);

		setSize(800, 600);
		setVisible(true);
	}

	private void createInternalFrames() {
		left = new LayoutInternalFrame(100, 0);
		top = new LayoutInternalFrame(0, 100);
		bottom = new LayoutInternalFrame(0, 100);
		right = new LayoutInternalFrame(100, 0);

		main = new LayoutInternalFrame(0, 0);
		main.setResizable(false);
	}

	private JMenuBar createMenuBar() {
		JMenuBar menuBar = new JMenuBar();

		JMenu menu = new JMenu("View");
		menu.setMnemonic(KeyEvent.VK_V);
		menuBar.add(menu);

		leftMenuItem = new JCheckBoxMenuItem("Left");
		leftMenuItem.addActionListener(this);
		menu.add(leftMenuItem);

		rightMenuItem = new JCheckBoxMenuItem("Right");
		rightMenuItem.addActionListener(this);
		menu.add(rightMenuItem);

		topMenuItem = new JCheckBoxMenuItem("Top");
		topMenuItem.addActionListener(this);
		menu.add(topMenuItem);

		bottomMenuItem = new JCheckBoxMenuItem("Bottom");
		bottomMenuItem.addActionListener(this);
		menu.add(bottomMenuItem);

		return menuBar;
	}

	class LayoutInternalFrame extends JInternalFrame {

		private static final long serialVersionUID = 1L;

		public LayoutInternalFrame(int width, int height) {
			super();
			
			setBorder(new InternalFrameBorder());
			setSize(new Dimension(width, height));
			((BasicInternalFrameUI) getUI()).setNorthPane(null);
			
			setResizable(true);
			setVisible(true);
		}

		public void reshape(int x, int y, int width, int height) {
			super.reshape(x, y, width, height);
			setPreferredSize(new Dimension(width, height));
		}
	}
	
	class InternalFrameBorder extends AbstractBorder {

		private static final long serialVersionUID = 1L;

		private Insets insets = new Insets(2, 2, 2, 2);

		public void paintBorder(Component c, Graphics g, int x, int y, int w, int h) {		
			g.setColor(Color.BLACK);
			g.drawLine(1, 0, w - 2, 0);
			g.drawLine(0, 1, 0, h - 2);
			g.drawLine(w - 1, 1, w - 1, h - 2);
			g.drawLine(1, h - 1, w - 2, h - 1);
		}

		public Insets getBorderInsets(Component c) {
			return insets;
		}

		public Insets getBorderInsets(Component c, Insets newInsets) {
			newInsets.top = insets.top;
			newInsets.left = insets.left;
			newInsets.bottom = insets.bottom;
			newInsets.right = insets.right;
			return newInsets;
		}
	}

	public void actionPerformed(ActionEvent e) {
		if ("Top".equals(e.getActionCommand())) {
			if (topMenuItem.isSelected()) {
				add(top, BorderLayout.NORTH);
			} else {
				remove(top);
			}
		} else if ("Left".equals(e.getActionCommand())) {
			if (leftMenuItem.isSelected()) {
				add(left, BorderLayout.WEST);
			} else {
				remove(left);
			}
		} else if ("Right".equals(e.getActionCommand())) {
			if (rightMenuItem.isSelected()) {
				add(right, BorderLayout.EAST);
			} else {
				remove(right);
			}
		} else if ("Bottom".equals(e.getActionCommand())) {
			if (bottomMenuItem.isSelected()) {
				add(bottom, BorderLayout.SOUTH);
			} else {
				remove(bottom);
			}
		}

		validate();
		repaint();
	}

	public static void main(String[] args) {
		new Frames();
	}

}