JPopupMenu有一組非常具體的操作要求,是的,它們確實(shí)會(huì)在外觀和感覺(jué)之間發(fā)生變化.

您可以做的是使用未經(jīng)修飾的JFrame創(chuàng)建自己的彈出窗口.這里的技巧是模仿所需的彈出窗口,例如,當(dāng)另一個(gè)組件獲得焦點(diǎn)時(shí)自動(dòng)關(guān)閉,使用轉(zhuǎn)義鍵消除彈出窗口的功能…等等…

這只是提供概念驗(yàn)證的簡(jiǎn)單示例,我個(gè)人還為轉(zhuǎn)義鍵添加了鍵綁定,某種偵聽器界面,以允許搜索窗格請(qǐng)求關(guān)閉彈出窗口以及自動(dòng)聚焦的功能窗口可見時(shí)的某些組件,但是那只是我…

import java.awt.BorderLayout;

import java.awt.EventQueue;

import java.awt.GridBagLayout;

import java.awt.Point;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowEvent;

import java.awt.event.WindowFocusListener;

import javax.swing.JButton;

import javax.swing.JComponent;

import javax.swing.JFrame;

import javax.swing.JList;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextField;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

public class TestPopup {

public static void main(String[] args) {

new TestPopup();

}

public TestPopup() {

EventQueue.invokeLater(new Runnable() {

@Override

public void run() {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {

ex.printStackTrace();

}

JFrame frame = new JFrame("Testing");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.add(new TestPane());

frame.pack();

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

});

}

public class TestPane extends JPanel {

private JButton show;

public TestPane() {

setLayout(new GridBagLayout());

show = new JButton("...");

show.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

PopupWindow window = new PopupWindow();

window.show(show, 0, show.getHeight());

}

});

add(show);

}

}

public class SearchPane extends JPanel {

private JList list;

private JTextField search;

public SearchPane() {

setLayout(new BorderLayout());

list = new JList();

list.setPrototypeCellValue("This is just a test");

list.setVisibleRowCount(20);

search = new JTextField(10);

add(new JScrollPane(list));

add(search, BorderLayout.SOUTH);

}

}

public class PopupWindow extends JFrame {

private SearchPane searchPane;

public PopupWindow() {

setUndecorated(true);

setDefaultCloseOperation(DISPOSE_ON_CLOSE);

addWindowFocusListener(new WindowFocusListener() {

@Override

public void windowGainedFocus(WindowEvent e) {

}

@Override

public void windowLostFocus(WindowEvent e) {

dispose();

}

});

searchPane = new SearchPane();

add(searchPane);

pack();

}

public void show(JComponent parent, int x, int y) {

Point point = new Point(x, y);

SwingUtilities.convertPointToScreen(point, parent);

setLocation(point);

setVisible(true);

}

}

}

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