Custom Layout Demo : Customized Layout « Swing JFC « Java






Custom Layout Demo

Custom Layout Demo
    
/* From http://java.sun.com/docs/books/tutorial/index.html */

/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

/*
 * CustomLayoutDemo.java is a 1.4 application that requires one other file:
 * DiagonalLayout.java
 */

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.LayoutManager;

import javax.swing.JButton;
import javax.swing.JFrame;

public class CustomLayoutDemo {
  public static void addComponentsToPane(Container pane) {
    pane.setLayout(new DiagonalLayout());

    pane.add(new JButton("Button 1"));
    pane.add(new JButton("Button 2"));
    pane.add(new JButton("Button 3"));
    pane.add(new JButton("Button 4"));
    pane.add(new JButton("Button 5"));
  }

  /**
   * Create the GUI and show it. For thread safety, this method should be
   * invoked from the event-dispatching thread.
   */
  private static void createAndShowGUI() {
    //Make sure we have nice window decorations.
    JFrame.setDefaultLookAndFeelDecorated(true);

    //Create and set up the window.
    JFrame frame = new JFrame("CustomLayoutDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Set up the content pane.
    addComponentsToPane(frame.getContentPane());

    //Display the window.
    frame.pack();
    frame.setVisible(true);
  }

  public static void main(String[] args) {
    //Schedule a job for the event-dispatching thread:
    //creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        createAndShowGUI();
      }
    });
  }
}

/*
 * 1.2+ version. Used by CustomLayoutDemo.java.
 */

class DiagonalLayout implements LayoutManager {
  private int vgap;

  private int minWidth = 0, minHeight = 0;

  private int preferredWidth = 0, preferredHeight = 0;

  private boolean sizeUnknown = true;

  public DiagonalLayout() {
    this(5);
  }

  public DiagonalLayout(int v) {
    vgap = v;
  }

  /* Required by LayoutManager. */
  public void addLayoutComponent(String name, Component comp) {
  }

  /* Required by LayoutManager. */
  public void removeLayoutComponent(Component comp) {
  }

  private void setSizes(Container parent) {
    int nComps = parent.getComponentCount();
    Dimension d = null;

    //Reset preferred/minimum width and height.
    preferredWidth = 0;
    preferredHeight = 0;
    minWidth = 0;
    minHeight = 0;

    for (int i = 0; i < nComps; i++) {
      Component c = parent.getComponent(i);
      if (c.isVisible()) {
        d = c.getPreferredSize();

        if (i > 0) {
          preferredWidth += d.width / 2;
          preferredHeight += vgap;
        } else {
          preferredWidth = d.width;
        }
        preferredHeight += d.height;

        minWidth = Math.max(c.getMinimumSize().width, minWidth);
        minHeight = preferredHeight;
      }
    }
  }

  /* Required by LayoutManager. */
  public Dimension preferredLayoutSize(Container parent) {
    Dimension dim = new Dimension(0, 0);
    int nComps = parent.getComponentCount();

    setSizes(parent);

    //Always add the container's insets!
    Insets insets = parent.getInsets();
    dim.width = preferredWidth + insets.left + insets.right;
    dim.height = preferredHeight + insets.top + insets.bottom;

    sizeUnknown = false;

    return dim;
  }

  /* Required by LayoutManager. */
  public Dimension minimumLayoutSize(Container parent) {
    Dimension dim = new Dimension(0, 0);
    int nComps = parent.getComponentCount();

    //Always add the container's insets!
    Insets insets = parent.getInsets();
    dim.width = minWidth + insets.left + insets.right;
    dim.height = minHeight + insets.top + insets.bottom;

    sizeUnknown = false;

    return dim;
  }

  /* Required by LayoutManager. */
  /*
   * This is called when the panel is first displayed, and every time its size
   * changes. Note: You CAN'T assume preferredLayoutSize or minimumLayoutSize
   * will be called -- in the case of applets, at least, they probably won't
   * be.
   */
  public void layoutContainer(Container parent) {
    Insets insets = parent.getInsets();
    int maxWidth = parent.getWidth() - (insets.left + insets.right);
    int maxHeight = parent.getHeight() - (insets.top + insets.bottom);
    int nComps = parent.getComponentCount();
    int previousWidth = 0, previousHeight = 0;
    int x = 0, y = insets.top;
    int rowh = 0, start = 0;
    int xFudge = 0, yFudge = 0;
    boolean oneColumn = false;

    // Go through the components' sizes, if neither
    // preferredLayoutSize nor minimumLayoutSize has
    // been called.
    if (sizeUnknown) {
      setSizes(parent);
    }

    if (maxWidth <= minWidth) {
      oneColumn = true;
    }

    if (maxWidth != preferredWidth) {
      xFudge = (maxWidth - preferredWidth) / (nComps - 1);
    }

    if (maxHeight > preferredHeight) {
      yFudge = (maxHeight - preferredHeight) / (nComps - 1);
    }

    for (int i = 0; i < nComps; i++) {
      Component c = parent.getComponent(i);
      if (c.isVisible()) {
        Dimension d = c.getPreferredSize();

        // increase x and y, if appropriate
        if (i > 0) {
          if (!oneColumn) {
            x += previousWidth / 2 + xFudge;
          }
          y += previousHeight + vgap + yFudge;
        }

        // If x is too large,
        if ((!oneColumn)
            && (x + d.width) > (parent.getWidth() - insets.right)) {
          // reduce x to a reasonable number.
          x = parent.getWidth() - insets.bottom - d.width;
        }

        // If y is too large,
        if ((y + d.height) > (parent.getHeight() - insets.bottom)) {
          // do nothing.
          // Another choice would be to do what we do to x.
        }

        // Set the component's size and position.
        c.setBounds(x, y, d.width, d.height);

        previousWidth = d.width;
        previousHeight = d.height;
      }
    }
  }

  public String toString() {
    String str = "";
    return getClass().getName() + "[vgap=" + vgap + str + "]";
  }
}
           
         
    
    
    
  








Related examples in the same category

1.Custom layout: EdgeLayout
2.Customized layout managerCustomized layout manager
3.ColumnLayoutColumnLayout
4.Applet GUI demo of TreeLayout layout manager
5.Relative Layout Manager for Java J2SE
6.Basically two (or more) columns of different, but constant, widths
7.GraphPaperLayoutGraphPaperLayout
8.Table Layout
9.Table Layout implements LayoutManager2
10.Table layout manager
11.Flex Layout
12.Square Layout
13.Center Layout
14.Wrapper Layout
15.Tile Layout
16.X Y Layout
17.DividerLayout is layout that divides two components with the column of actions
18.Stack Layout, uses an orientation to determine if the contents should be arranged horizontally or vertically.
19.A simple layoutmanager to overlay all components of a parent.
20.A layout manager that displays a single component in the center of its container.
21.A layout manager that spaces components over six columns in seven different formats.
22.Compents are laid out in a circle.
23.Special simple layout used in TabbedContainer
24.Place components at exact locations (x, y, width, height) and then determine how they behave when the window containing them (their parent) is resized
25.Specialised layout manager for a grid of components.