dialoglayout.java

Manning - Java Swing 2nd Edition (2003) swing2e源代码

/** 
 *  Copyright 1999-2002 Matthew Robinson and Pavel Vorobiev. 
 *  All Rights Reserved. 
 * 
 *  =================================================== 
 *  This program contains code from the book "Swing" 
 *  2nd Edition by Matthew Robinson and Pavel Vorobiev 
 *  http://www.spindoczine.com/sbe 
 *  =================================================== 
 * 
 *  The above paragraph must be included in full, unmodified 
 *  and completely intact in the beginning of any source code 
 *  file that references, copies or uses (in any way, shape 
 *  or form) code contained in this file. 
 */ 

package dl;

import java.awt.*;
import java.util.*;

public class DialogLayout 
	implements LayoutManager {

	protected int m_divider = -1;
	protected int m_hGap = 10;
	protected int m_vGap = 5;

	public DialogLayout() {}

	public DialogLayout(int hGap, int vGap) {
		m_hGap = hGap;
		m_vGap = vGap;
	}

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

	public void removeLayoutComponent(Component comp) {}

	public Dimension preferredLayoutSize(Container parent) {
		int divider = getDivider(parent);
		
		int w = 0;
		int h = 0;
		for (int k=1 ; k<parent.getComponentCount(); k+=2) {
			Component comp = parent.getComponent(k);
			Dimension d = comp.getPreferredSize();
			w = Math.max(w, d.width);
			h += d.height + m_vGap;
		}
		h -= m_vGap;

		Insets insets = parent.getInsets();
		return new Dimension(divider+w+insets.left+insets.right, 
			h+insets.top+insets.bottom);
	}

	public Dimension minimumLayoutSize(Container parent) {
		return preferredLayoutSize(parent);
	}

	public void layoutContainer(Container parent) {
		int divider = getDivider(parent);
		
		Insets insets = parent.getInsets();
		int w = parent.getWidth() - insets.left - insets.right - divider;
		int x = insets.left;
		int y = insets.top;

		for (int k=1 ; k<parent.getComponentCount(); k+=2) {
			Component comp1 = parent.getComponent(k-1);
			Component comp2 = parent.getComponent(k);
			Dimension d = comp2.getPreferredSize();
			
			comp1.setBounds(x, y, divider-m_hGap, d.height);
			comp2.setBounds(x+divider, y, w, d.height);
			y += d.height + m_vGap;
		}
	}

	public int getHGap() {
		return m_hGap;
	}

	public int getVGap() {
		return m_vGap;
	}

	public void setDivider(int divider) {
		if (divider > 0)
			m_divider = divider;
	}
	
	public int getDivider() {
		return m_divider;
	}

	protected int getDivider(Container parent) {
		if (m_divider > 0)
			return m_divider;

		int divider = 0;
		for (int k=0 ; k<parent.getComponentCount(); k+=2) {
			Component comp = parent.getComponent(k);
			Dimension d = comp.getPreferredSize();
			divider = Math.max(divider, d.width);
		}
		divider += m_hGap;
		return divider;
	}

	public String toString() {
		return getClass().getName() + "[hgap=" + m_hGap + ",vgap=" 
			+ m_vGap + ",divider=" + m_divider + "]";
	}
}