borderlayout2.java

修正了jdk1.6中对托盘事件产生异常的bug.

/*
 * Copyright (C) 2004 NNL Technology AB
 * Visit www.infonode.net for information about InfoNode(R) 
 * products and how to contact NNL Technology AB.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
 * MA 02111-1307, USA.
 */


// $Id: BorderLayout2.java,v 1.8 2005/02/16 11:28:12 jesper Exp $
package net.infonode.gui.layout;

import java.awt.*;

/**
 * @author $Author: jesper $
 * @version $Revision: 1.8 $
 */
public class BorderLayout2 implements LayoutManager2 {
  private Component[][] components;

  public BorderLayout2() {
    components = new Component[3][];

    for (int i = 0; i < components.length; i++) {
      components[i] = new Component[3];
    }
  }

  public void addLayoutComponent(String name, Component comp) {
  }

  public void addLayoutComponent(Component comp, Object constraints) {
    if (constraints instanceof Point) {
      Point p = (Point) constraints;
      components[p.x][p.y] = comp;
    }
    else
      throw new RuntimeException("BorderLayout2 constraint must be a Point!");
  }

  public float getLayoutAlignmentX(Container target) {
    return target.getAlignmentX();
  }

  public float getLayoutAlignmentY(Container target) {
    return target.getAlignmentY();
  }

  public void invalidateLayout(Container target) {
  }

  public Dimension maximumLayoutSize(Container target) {
    int width = 0;
    int height = 0;

    for (int i = 0; i < 3; i++) {
      width += getMaximumWidth(i);
      height += getMaximumHeight(i);
    }

    return new Dimension(width, height);
  }

  private int getPreferredHeight(int row) {
    int maxHeight = 0;

    for (int i = 0; i < 3; i++) {
      Component c = components[i][row];

      if (c != null && c.isVisible()) {
        int height = c.getPreferredSize().height;

        if (height > maxHeight)
          maxHeight = height;
      }
    }

    return maxHeight;
  }

//  private static int tt = 0;

  private int getPreferredWidth(int column) {
    int maxWidth = 0;

    for (int i = 0; i < 3; i++) {
      Component c = components[column][i];
      if (c != null && c.isVisible()) {
        int width = c.getPreferredSize().width;

        if (width > maxWidth)
          maxWidth = width;
      }
    }

    return maxWidth;
  }

  private int getMinimumHeight(int row) {
    int maxHeight = 0;

    for (int i = 0; i < 3; i++) {
      Component c = components[i][row];

      if (c != null && c.isVisible()) {
        int height = c.getMinimumSize().height;

        if (height > maxHeight)
          maxHeight = height;
      }
    }

    return maxHeight;
  }

  private int getMinimumWidth(int column) {
    int maxWidth = 0;

    for (int i = 0; i < 3; i++) {
      Component c = components[column][i];

      if (c != null && c.isVisible()) {
        int width = c.getMinimumSize().width;

        if (width > maxWidth)
          maxWidth = width;
      }
    }

    return maxWidth;
  }

  private int getMaximumHeight(int row) {
    int minHeight = Integer.MAX_VALUE;

    for (int i = 0; i < 3; i++) {
      Component c = components[i][row];

      if (c != null && c.isVisible()) {
        int height = c.getMaximumSize().height;

        if (height < minHeight)
          minHeight = height;
      }
    }

    return minHeight;
  }

  private int getMaximumWidth(int column) {
    int minWidth = 0;

    for (int i = 0; i < 3; i++) {
      Component c = components[column][i];

      if (c != null && c.isVisible()) {
        int width = c.getMaximumSize().width;

        if (width < minWidth)
          minWidth = width;
      }
    }

    return minWidth;
  }

  private static void setBounds(Component component, Rectangle bounds) {
    int width = Math.min(component.getMaximumSize().width, bounds.width);
    int height = Math.min(component.getMaximumSize().height, bounds.height);
    Rectangle r = new Rectangle(bounds.x + (int) (component.getAlignmentX() * (bounds.width - width)),
                                bounds.y + (int) (component.getAlignmentY() * (bounds.height - height)),
                                width,
                                height);
    component.setBounds(r);
  }

  public void layoutContainer(Container parent) {
    //System.out.println("Laying out container: " + components[2][0].isVisible());
    Insets insets = parent.getInsets();
    Dimension innerSize = LayoutUtil.getInteriorSize(parent);
    int[] w = {getPreferredWidth(0), getPreferredWidth(2)};
    int[] h = {getPreferredHeight(0), getPreferredHeight(2)};

    int y = insets.top;

    for (int row = 0; row < 3; row++) {
      int height = row == 1 ? innerSize.height - h[0] - h[1] : h[row / 2];
      int x = insets.left;

      for (int col = 0; col < 3; col++) {
        int width = col == 1 ? innerSize.width - w[0] - w[1] : w[col / 2];
        Component c = components[col][row];

        if (c != null && c.isVisible()) {
          setBounds(c, new Rectangle(x, y, width, height));
        }

        x += width;
      }

      y += height;
    }
    //System.out.println("Layout complete: " + components[2][0].isVisible());
  }

  public Dimension minimumLayoutSize(Container parent) {
    int width = 0;
    int height = 0;

    for (int i = 0; i < 3; i++) {
      width += getMinimumWidth(i);
      height += getMinimumHeight(i);
    }

    return new Dimension(width, height);
  }

  public Dimension preferredLayoutSize(Container parent) {
    int width = 0;
    int height = 0;

    for (int i = 0; i < 3; i++) {
      width += getPreferredWidth(i);
      height += getPreferredHeight(i);
    }

    return new Dimension(width, height);
  }

  public void removeLayoutComponent(Component comp) {
    for (int col = 0; col < 3; col++) {
      for (int row = 0; row < 3; row++) {
        if (components[col][row] == comp) {
          components[col][row] = null;
          return;
        }
      }
    }
  }
}