练手java GUI(五)

Dialog(模态和非模态两种，FileDialog不再举例)：

 

package gui.test08;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestDialog extends Frame {
	private TextField tf = new TextField(10);
	
	public TestDialog() {
		Button b1 = new Button("打开模态对话框");
		Button b2 = new Button("打开非模态对话框");
		add(tf,"North");
		add(b1,"Center");
		add(b2,BorderLayout.EAST);
		//
		b1.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				MyDialog dlg = new MyDialog(TestDialog.this,"modal dialog",true);
				dlg.setInfo(tf.getText());
				dlg.setVisible(true);//模态对话框阻塞在这里,直到它被关闭
				//...
				tf.setText(dlg.getInfo());
			}
		});
		//
		//
		b2.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				MyDialog dlg = new MyDialog(TestDialog.this,"nonModal dialog",false);
				dlg.setInfo(tf.getText());
				dlg.setVisible(true);//非模态对话框后面的代码会继续往下执行,不会阻塞
				//...
				//tf.setText(dlg.getInfo());
			}
		});
		//
		addWindowListener(new WindowAdapter() {

			@Override
			public void windowClosing(WindowEvent e) {
				dispose();
				System.exit(0);
			}
			
		});
	}
	
	
	public static void main(String[] args) {
		TestDialog mainFrame = new TestDialog();
		mainFrame.setSize(400, 400);
		mainFrame.setTitle("TestDialog");
		mainFrame.setVisible(true);
	}


	public void setInfo(String text) {
		tf.setText(text);
	}
}

 

///////////////////////////////////////////////

 

package gui.test08;

import java.awt.Button;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class MyDialog extends Dialog {
	private TextField tf = new TextField(10);
	private String strInfo = null;

	public MyDialog(Frame testDialog, String title, boolean modal) {
		super(testDialog, title, modal);
		setBounds(0, 0, 200, 150);

		Button b1 = new Button("应用");
		Button b2 = new Button("确定");

		//
		add(tf, "North");
		add(b1, "Center");
		add(b2, "East");

		if (this.isModal()) {
			b1.setEnabled(false);
		}
		//
		b1.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				((TestDialog)(MyDialog.this.getOwner())).setInfo(tf.getText());
			}
		});
		//
		//
		b2.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				if(isModal()){
					strInfo = tf.getText();
				}else{
					((TestDialog)(MyDialog.this.getParent())).setInfo(tf.getText());
				}
				dispose();
			}
		});
		//
	}

	public String getInfo() {
		return strInfo;
	}

	public void setInfo(String text) {
		tf.setText(text);
	}

}