gridbaglayoutdemo.java

精通JBuilder2006 源代码 精通JBuilder2006 源代码

package chapter6.layout;

import java.awt.*;
import javax.swing.*;

public class GridBagLayoutDemo extends JFrame {

    private GridBagLayoutDemo() {
        Container contentPane = this.getContentPane();
        GridBagLayout gbLayout = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        contentPane.setLayout(gbLayout);
        c.fill = GridBagConstraints.BOTH;
        c.weightx = 1.0;
        makebutton("Button1", gbLayout, c);
        makebutton("Button2", gbLayout, c);
        makebutton("Button3", gbLayout, c);
        c.gridwidth = GridBagConstraints.REMAINDER; //本行结束
        makebutton("Button4", gbLayout, c);
        c.weightx = 0.0; //恢复初始设置
        makebutton("Button5", gbLayout, c); //另一行
        c.gridwidth = 1;
        makebutton("Button5a", gbLayout, c);
        c.gridwidth = GridBagConstraints.RELATIVE; //除了最后一个以外的网格
        makebutton("Button6", gbLayout, c);
        c.gridwidth = GridBagConstraints.REMAINDER; //本行结束
        makebutton("Button7", gbLayout, c);
        c.gridwidth = 1; //恢复初始设置
        c.gridheight = 2;
        c.weighty = 1.0;
        makebutton("Button8", gbLayout, c);
        c.weighty = 0.0; //恢复初始设置
        c.gridwidth = GridBagConstraints.REMAINDER;
        c.gridheight = 1; //恢复初始设置
        makebutton("Button9", gbLayout, c);
        makebutton("Button10", gbLayout, c);
        this.setTitle("GridBagLayoutDemo");
        this.setSize(600, 400);
        this.setLocation(400, 400);
        this.setVisible(true);
    }

    protected void makebutton(String name,
                              GridBagLayout gridbag, GridBagConstraints c) {
        Button button = new Button(name);
        gridbag.setConstraints(button, c);
        getContentPane().add(button);
    }

    public static void main(String[] args) {
        GridBagLayoutDemo test = new GridBagLayoutDemo();
    }
}