wmvccontroller.java

来自「一个温度计的小程序」· Java 代码 · 共 56 行

/*
 * WmvcController - implements a general purpose Swing based
 *     Controler using the Command pattern - for Wmvc framework
 * Used to simplify Swing controls
 *
 * (c) 2001, Bruce E. Wampler
 */

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

public class WmvcController
        implements      ActionListener,
                        ItemListener
{
    protected JComponent myComponent;
    private WmvcExecutor wmvcExecutor;  // The Executor object

    // This constructor is use by the subobjects
    public WmvcController(JComponent comp,    // the component
			  String tip,
    			  WmvcExecutor wExec)
    {
	myComponent = comp;
	wmvcExecutor = wExec;
	if (tip != null)
	    myComponent.setToolTipText(tip);
    }

    public WmvcExecutor getWmvcExecutor()
        { return wmvcExecutor; }

    /* ------------------------------------------------------
     * Implement the Listeners for components.
     * Each listener will send a message to the appropriate
     * execute method from the associated WmvcExecutor. The type
     * of event determines the signature of the execute method.
     */

    // implment the ActionListener
    public void actionPerformed(ActionEvent event)
    {
        if (wmvcExecutor != null)
            wmvcExecutor.execute(event);
    }

    // implement ItemLisetener
    public void itemStateChanged(ItemEvent event)
    {
        if (wmvcExecutor != null)
            wmvcExecutor.execute(event);
    }
}