xylayout.java

eq跨平台查询工具源码 eq跨平台查询工具源码

/*
 * XYLayout.java
 *
 * Copyright (C) 2002, 2003, 2004, 2005, 2006 Takis Diakoumis
 *
 * 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 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.
 *
 */



package org.underworldlabs.swing.layouts;

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.LayoutManager2;
import java.awt.Rectangle;

import java.io.Serializable;

import java.util.Hashtable;

/* ----------------------------------------------------------
 * CVS NOTE: Changes to the CVS repository prior to the 
 *           release of version 3.0.0beta1 has meant a 
 *           resetting of CVS revision numbers.
 * ----------------------------------------------------------
 */

/**
 *
 * @author   Takis Diakoumis
 * @version  $Revision: 1.4 $
 * @date     $Date: 2006/05/14 06:56:07 $
 */
public class XYLayout implements LayoutManager2, Serializable {
    
    private static XYConstraints defaultConstraints;
    
    private int width;
    private int height;
    private Hashtable info;
    
    public XYLayout() {
        info = new Hashtable();
    }
    
    public XYLayout(int i, int j) {
        info = new Hashtable();
        width = i;
        height = j;
    }
    
    public int getWidth() {
        return width;
    }
    
    public void setWidth(int i) {
        width = i;
    }
    
    public int getHeight() {
        return height;
    }
    
    public void setHeight(int i) {
        height = i;
    }
    
    public String toString() {
        return "XYLayout [width = " + width + ", height = " + height + "]";
    }
    
    public void addLayoutComponent(String s, Component component) {}
    
    public void removeLayoutComponent(Component component) {
        info.remove(component);
    }
    
    public Dimension preferredLayoutSize(Container container) {
        return getLayoutSize(container, true);
    }
    
    public Dimension minimumLayoutSize(Container container) {
        return getLayoutSize(container, false);
    }
    
    public void layoutContainer(Container container) {
        Insets insets = container.getInsets();
        int i = container.getComponentCount();
        
        for(int j = 0; j < i; j++) {
            Component component = container.getComponent(j);
            if(component.isVisible()) {
                Rectangle rectangle = getComponentBounds(component, true);
                component.setBounds(insets.left + rectangle.x, insets.top +
                rectangle.y, rectangle.width, rectangle.height);
            } 
        } 
    }
/*
  public void addLayoutComponent(Component component, Object obj) {
    if(obj instanceof XYConstraints)
      info.put(component, obj);
  }
 */
    
    public void addLayoutComponent(Component component, Object obj) {
        if(obj instanceof XYConstraints)
            info.put(component, getComponentBounds(component, (XYConstraints)obj, true));
    }
    
    public Dimension maximumLayoutSize(Container container) {
        return new Dimension(0x7fffffff, 0x7fffffff);
    }
    
    public float getLayoutAlignmentX(Container container) {
        return 0.5F;
    }
    
    public float getLayoutAlignmentY(Container container) {
        return 0.5F;
    }
    
    public void invalidateLayout(Container container) {}
    
    Rectangle getComponentBounds(Component component, XYConstraints xyconstraints,
    boolean flag) {
        
        if(xyconstraints == null) {
            
            if (defaultConstraints == null)
                defaultConstraints = new XYConstraints();
            
            xyconstraints = defaultConstraints;
            
        } 
        
        Rectangle rectangle = new Rectangle(xyconstraints.x, xyconstraints.y,
        xyconstraints.width, xyconstraints.height);
        
        if(rectangle.width <= 0 || rectangle.height <= 0) {
            Dimension dimension = flag ? component.getPreferredSize() :
                component.getMinimumSize();
                
                if(rectangle.width <= 0)
                    rectangle.width = dimension.width;
                if(rectangle.height <= 0)
                    rectangle.height = dimension.height;
                
        } 
        
        return rectangle;
    }
    
    Rectangle getComponentBounds(Component component, boolean flag) {
        //    XYConstraints xyconstraints = (XYConstraints)info.get(component);
        Rectangle rectangle = (Rectangle)info.get(component);
        //      if(xyconstraints == null)
        //        xyconstraints = defaultConstraints;
        
        //      Rectangle rectangle = new Rectangle(xyconstraints.x, xyconstraints.y,
        //                                          xyconstraints.width, xyconstraints.height);
        
        if(rectangle.width <= 0 || rectangle.height <= 0) {
            Dimension dimension = flag ? component.getPreferredSize() :
                component.getMinimumSize();
                
                if(rectangle.width <= 0)
                    rectangle.width = dimension.width;
                if(rectangle.height <= 0)
                    rectangle.height = dimension.height;
                
        } 
        
        return rectangle;
    }
    
    Dimension getLayoutSize(Container container, boolean flag) {
        Dimension dimension = new Dimension(0, 0);
        
        if(width <= 0 || height <= 0) {
            
            int i = container.getComponentCount();
            
            for(int j = 0; j < i; j++) {
                Component component = container.getComponent(j);
                
                if(component.isVisible()) {
                    Rectangle rectangle = getComponentBounds(component, flag);
                    dimension.width = Math.max(dimension.width,
                    rectangle.x + rectangle.width);
                    dimension.height = Math.max(dimension.height,
                    rectangle.y + rectangle.height);
                } 
                
            } 
            
        } 
        
        if(width > 0)
            dimension.width = width;
        
        if(height > 0)
            dimension.height = height;
        
        Insets insets = container.getInsets();
        dimension.width += insets.left + insets.right;
        dimension.height += insets.top + insets.bottom;
        
        return dimension;
    }
    
} // class