interactortest.java

本程序通过两个简单的例子来说明Java acm包中的使用

import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import acm.graphics.*;
import acm.program.*;


public class InteractorTest extends GraphicsProgram{

	
	public void init(){
		
		initTextField();
		initAddButton();
		initRemoveButton();
		initClearButton();
		
		addMouseListeners();
		addActionListeners();
		text.addActionListener(this);
	}

	private void initClearButton() {
		clear = new JButton("Clear");	
		add(clear, SOUTH);
		
	}

	private void initRemoveButton() {
		remove = new JButton("Remove");	
		add(remove, SOUTH);
		
	}

	private void initAddButton() {
		add = new JButton("Add");	
		add(add, SOUTH);
	}

	private void initTextField() {
		
		text = new JTextField(40);
		add(new JLabel("Name   "), SOUTH);
		add(text, SOUTH);
		text.setActionCommand("Add");
	}
	
	private void addGBox(String str, double height){
		GBox rect = new GBox(str);
		rects.put(str, rect);
		add(rect,(getWidth()- rect.getWidth())/2, (getHeight() - rect.getHeight())/2 + height);
	}
	
	private void removeGBox(){
		String GBoxName = text.getText();
		for(String name: rects.keySet()){
			if(name.equals(GBoxName)){
				remove(rects.get(name));
			}
		}
	}
	
	public void actionPerformed(ActionEvent e){
		String cmd = e.getActionCommand();
		if(cmd.equals("Clear")){
			removeAll();
			height = 0;
		}
		else if(cmd.equals("Add")){
			addGBox(text.getText(), height);
			height = height + GBox.BOX_HEIGHT;
		}
		else if (cmd.equals("Remove")){
			removeGBox();
		}
	}
	
	public void mouseDragged(MouseEvent e){
		
		
	}
	
	private GBox getGBox(int x, int y){
		if(getElementAt(x, y) != null){
			GBox box = (GBox)getElementAt(x, y);
			return box;
		}
		return null;
	}
	
	private Map<String, GBox> rects = new HashMap<String, GBox>();
	
	
	
	private JTextField text;
	private JButton add;
	private JButton clear;
	private JButton remove;
	
	private double height;

}