dialoglayout.java

这是JFrame的一些例子(chapter4)。可以参考一下。想要做GUI的人不妨看一看

/**
	DialogLayout
*/
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 + "]";
	}
}