java - 用于检测三次单击而不触发双击或单击的通用类

Question

编辑——根据已接受的答案更正的代码显示在这篇文章的底部。

我找到了一种方法 ( written by Andremoniy ) 来捕捉双击和三次点击而不触发单击和双击。它非常适合我的目的。

我对其进行了修改，以便实现可以调整点击间隔。这也很好用。

我的修改包括使它成为一个抽象类，定义实现必须定义的 5 个 abstract 方法(single、double、triple 和“many”的方法“点击次数以及点击间隔调整器)。

这是修改后的版本(println 语句具有指导意义):

public abstract class Click123 extends JPanel  
{
  public abstract void singleClick();
  public abstract void doubleClick();
  public abstract void tripleClick();  
  public abstract void manyClick();
  public abstract int  getFreq(); 

  public Click123()
  {
    addMouseListener
    (
      new MouseAdapter() 
      {
        Thread cp = null;

        public void mouseClicked(MouseEvent e) 
        {
          if (cp != null && cp.isAlive())
            cp.interrupt(); 

          if (e.getClickCount() == 1) 
          {
            cp =  new Thread(new ClickProcessor(new Callable<Void>() {
              @Override public Void call() throws Exception {
                singleClick();
                return null;
              }
            }));
            cp.start();
          }
          else if (e.getClickCount() == 2) 
          {
            cp = new Thread(new ClickProcessor(new Callable<Void>() {
              @Override public Void call() throws Exception {
                doubleClick();
                return null;
              }
            }));
            cp.start();
          }
          else if (e.getClickCount() == 3) 
          {
            cp =  new Thread(new ClickProcessor(new Callable<Void>() 
            {
              @Override public Void call() throws Exception {
                tripleClick();
                return null;
              }
              })              
            );
            cp.start();
          }
          else manyClick();
        } // mouseClicked
      }  // new MouseAdapter
    ); // add mouseListener
  } // Click123  

  class ClickProcessor implements Runnable 
  {
    Callable<Void> eventProcessor;

    ClickProcessor(Callable<Void> eventProcessor) 
    {
        this.eventProcessor = eventProcessor;
    }

    @Override public void run() 
    {
      try 
      {
          Thread.sleep(getFreq());
          eventProcessor.call();
      } catch (InterruptedException e) { System.out.println(e);} 
        catch (Exception e)            { System.out.println(e);}
    }  // run
  }  // class ClickProcessor
} // class Click123

实现方案如下:

public class NewMain1 {
  static int INITIAL_CLICK_FREQUENCY = ((Integer)Toolkit.getDefaultToolkit()
      .getDesktopProperty("awt.multiClickInterval"));

  public static int CLICK_FREQUENCY;

  static       JSpinner spinner   = new JSpinner();
  static final JLabel   ch        = new JLabel("Click here to test");

  public static void main(String[] args) {

    CLICK_FREQUENCY = INITIAL_CLICK_FREQUENCY;
    spinner = new JSpinner();
    spinner.setModel(new SpinnerNumberModel(CLICK_FREQUENCY, 200, 900, 50));
    spinner.addChangeListener(new ChangeListener() {
      @Override
      public void stateChanged(ChangeEvent e) {
        CLICK_FREQUENCY = (int) spinner.getValue();
      }
    });

    Click123 frame = new Click123(){ 
      public void singleClick(){
        JOptionPane.showMessageDialog(null,"Single click at " + CLICK_FREQUENCY);
      }
      public void doubleClick(){
        JOptionPane.showMessageDialog(null,"Double click at " + CLICK_FREQUENCY);
      }
      public void tripleClick(){
        JOptionPane.showMessageDialog(null,"Triple click at " + CLICK_FREQUENCY);
      }
      public void manyClick(){
        JOptionPane.showMessageDialog(null,"Many clicks at " + CLICK_FREQUENCY);  
      }
      public int getFreq(){
        return CLICK_FREQUENCY; 
      }
    };
    frame.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    frame.setLayout(new FlowLayout());
    frame.setSize(500, 300);
              ch.setBorder(new EtchedBorder());
    frame.add(ch);
    frame.add(spinner);
    frame.setVisible(true);
  } // main
}

如最初所写，Click123 扩展了 JFrame。我修改了它(通过将顶行更改为 extends JTextField)以使用 JTextField 类型的网格。然后我添加了一个按钮来动态更改点击间隔。所以现在我有三个相同的(除了扩展类型)巨大的代码块。

我的问题是:我如何修改 Click123 以便在不做任何改动的情况下使任何组件都可以识别单、双和三连击？

编辑——必要更改的摘要(对于我自己的应用程序，抽象 方法需要传递 MouseEvent 以确定哪个组件触发了点击):

类定义:

 public abstract class Click123<T extends Component>  
 {
   public abstract void singleClick(MouseEvent e); // same for 3 others
    ...

    public Click123(T target)
    {
      target.addMouseListener
      (
        new MouseAdapter() ...
     } ...
  }

final 添加为修饰符以传递 MouseEvent:

    public void mouseClicked(final MouseEvent e) 

传递 MouseEvent:

    singleClick(e); // same for doubleClick and tripleClick and manyClick

接收 MouseEvent 以确定触发点击的组件:

  public void doubleClick(MouseEvent e)

实现:

frame = new JPanel();
new Click123(frame) {

Answer 1

泛型不是必需的。您只需将 MouseListener 添加到 Component。

public abstract class Click123 // doesn't extend anything
{
    public Click123(Component comp)
    {
        comp.addMouseListener(new MouseAdapter() {
           // ...
        }));
    }
}

现在您可以只传递 JFrame，或您想要的任何 Component:

Click123 handler = new Click123(myJFrame){ 
  public void singleClick(){
    JOptionPane.showMessageDialog(null,"Single click at " + CLICK_FREQUENCY);
  }
  // Other implementing methods here
}