How to set the location of a JWindow below the textfield when the frame is being drag?

I am making an autocomplete project(just like Google). I have a jtextfield in my frame and whenever I type something to that field, a JWindow will appear below the textfield and that window is coming from another class.

Now the problem is how could I make the window always appear开发者_运维技巧 below the textfield whenever I drag the frame?

Any help would be much appreciated.. Thanks...

for manually set Location on the screen, you have to define something as private Point location; and getLocation from desired JComponent, don't forget dealyed show for Show Top-Level Container into invokeLater();

for example

public void showWindow() {   
    window.setVisible(false);
    location = myTextField.getLocationOnScreen();
    int x = location.x;
    int y = location.y;
    window.setLocation(x - 20, y - 20);
    Runnable doRun = new Runnable() {

         @Override
         public void run() {
             window.setVisible(true);
         }
    };
    SwingUtilities.invokeLater(doRun);
 }

Use SwingUtilities.convertPointToScreen()/convertPointFromScreen() pass JTextField's position and get coordinates on screen for the JWindow.

If I understood well, you're trying to do a JTextfield which propose a list of suggestions when the user enters some text.

I used this by the past: http://www.java2s.com/Code/Java/Swing-Components/AutocompleteComboBox.htm

It needs a bit of refactoring but your problem is what I said, it will help you solve it much more easily (and elegantly)!

To use the example:

Java2sAutoTextField textField = new Java2sAutoTextField(
   Arrays.asList(new String[] {"Value 1","Value 2"}));

You should not use a JWindow for that but a JComboBox instead of the TextField. JWindow's are designed to be toplevel windows ...