jdk/test/javax/swing/plaf/basic/BasicComboPopup/7072653/bug7072653.java

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 * version 2 for more details (a copy is included in the LICENSE file that
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/* @test
   @bug 7072653
   @summary JComboBox popup mispositioned if its height exceeds the screen height
   @author Semyon Sadetsky
  */


import javax.swing.*;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import java.awt.*;
import java.awt.Toolkit;

public class bug7072653 {

    private static JComboBox combobox;
    private static JFrame frame;

    public static void main(String[] args) throws Exception {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    frame = new JFrame("JComboBox Test");
                    setup(frame);
                }
            });
            test();
        }
        finally {
            frame.dispose();
        }

    }

    static void setup(JFrame frame)  {


        frame.setUndecorated(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setSize(320, 200);

        frame.getContentPane().setLayout(new FlowLayout());

        combobox = new JComboBox(new DefaultComboBoxModel() {
            public Object getElementAt(int index) { return "Element " + index; }
            public int getSize() {
                return 1000;
            }
        });


        combobox.setMaximumRowCount(100);
        frame.getContentPane().add(combobox);

        frame.setVisible(true);

    }

    static void test() throws Exception{
        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                combobox.addPopupMenuListener(new PopupMenuListener() {
                    @Override
                    public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
                    }

                    @Override
                    public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
                        int height = 0;
                        for (Window window : JFrame.getWindows()) {
                            if (Window.Type.POPUP == window.getType()) {
                                height = window.getSize().height;
                                break;
                            }
                        }
                        GraphicsConfiguration gc =
                                combobox.getGraphicsConfiguration();
                        Insets screenInsets = Toolkit.getDefaultToolkit()
                                .getScreenInsets(gc);

                        if (height == gc.getBounds().height - screenInsets.top -
                                screenInsets.bottom ) {
                            System.out.println("ok");
                            return;
                        }
                        throw new RuntimeException(
                                "Popup window height is wrong " + height);
                    }

                    @Override
                    public void popupMenuCanceled(PopupMenuEvent e) {
                    }
                });
                combobox.setPopupVisible(true);
                combobox.setPopupVisible(false);
            }
        });
    }


}