StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
text
Body
copied!<blockquote> <p>Is there a way to set a location relative to another JFrame</p> </blockquote> <p>You can:</p> <ul> <li>pass <code>JFrame</code> as argument for <a href="http://docs.oracle.com/javase/7/docs/api/java/awt/Window.html#setLocationRelativeTo%28java.awt.Component%29" rel="noreferrer">JDialog.setLocationRelativeTo(Component c)</a></li> <li>set to desired <code>Point</code> from <code>JFrame</code> to <a href="http://docs.oracle.com/javase/7/docs/api/java/awt/Window.html#setLocation%28java.awt.Point%29" rel="noreferrer">JDialog.setLocation(Point p)</a></li> </ul> <p>EDIT</p> <p>all Swing code must be done on <a href="http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html" rel="noreferrer">EventDispatchThread</a>, meaning that <code>setVisible(true)</code> should be wrapped into <code>invokeLater</code></p> <p>EDIT2</p> <blockquote> <p>when using the JFrame as Component c I am getting a cannot find symbol error </p> </blockquote> <p>not possible, some small mistake</p> <p><img src="https://i.stack.imgur.com/f2rg9.jpg" alt="enter image description here"></p> <pre><code>import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.border.EmptyBorder; public class ClosingFrameDialog extends JFrame { private JFrame frame = new JFrame(); private static final long serialVersionUID = 1L; private JMenuBar MenuBar; private JMenu File; private JMenuItem Exit; private JMenuItem ShowDialog; private JDialog dialog; private Point location; public ClosingFrameDialog() { Exit = new JMenuItem(" Exit "); Exit.addActionListener(new ExitListener()); ShowDialog = new JMenuItem(" Show Dialog "); ShowDialog.addActionListener(showingDialog()); File = new JMenu(" File "); File.add(Exit); File.add(ShowDialog); MenuBar = new JMenuBar(); MenuBar.add(File); frame.addWindowListener(exitListener); frame.setDefaultCloseOperation(EXIT_ON_CLOSE); frame.setJMenuBar(MenuBar); frame.setPreferredSize(new Dimension(400, 300)); frame.setLocation(100, 100); frame.pack(); frame.setVisible(true); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { createDialog(); } }); } private void createDialog() { JButton btn = new JButton(" Save changes "); btn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { //some stuff for saving whatewer programatically dialog.setVisible(false); } }); JButton btn1 = new JButton(" Ignore changes "); btn1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { dialog.setLocationRelativeTo(frame); dialog.setVisible(false); } }); dialog = new JDialog(); dialog.add(btn); dialog.add(btn1); dialog.setVisible(false); dialog.setAlwaysOnTop(true); dialog.setModal(true); dialog.setLayout(new GridLayout(2, 0, 10, 10)); JPanel pane = (JPanel) dialog.getContentPane(); pane.setBorder(new EmptyBorder(10, 10, 10, 10)); dialog.addWindowListener(closeListener); dialog.pack(); } // private WindowListener exitListener = new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { int confirm = JOptionPane.showOptionDialog(frame, "Are You Sure to Close this Application?", "Exit Confirmation", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, null, null); if (confirm == 0) { System.exit(1); } } @Override public void windowIconified(WindowEvent e) { int confirm = JOptionPane.showOptionDialog(frame, "Are You Sure to Close this Application?", "Exit Confirmation", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, null, null); if (confirm == 0) { //System.exit(1); } } }; // private WindowListener closeListener = new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { int confirm = JOptionPane.showOptionDialog(dialog, "Are you want to save changes", "Exit Confirmation", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, null, null); if (confirm == 0) { //some stuff for saving whatewer programatically dialog.setVisible(true); } else if (confirm == 1) {// nothing only hide JDialog dialog.setVisible(true); } } }; private Action showingDialog() { return new AbstractAction("Show Dialog") { private static final long serialVersionUID = 1L; @Override public void actionPerformed(ActionEvent e) { Runnable doRun = new Runnable() { @Override public void run() { dialog.setVisible(false); location = frame.getLocationOnScreen(); int x = location.x; int y = location.y; //dialog.setLocation(x, y); dialog.setLocationRelativeTo(frame); dialog.setVisible(true); } }; SwingUtilities.invokeLater(doRun); } }; } private class ExitListener implements ActionListener { @Override public void actionPerformed(ActionEvent e) { int confirm = JOptionPane.showOptionDialog(frame, "Are You Sure to Close this Application?", "Exit Confirmation", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, null, null); if (confirm == 0) { System.exit(1); } } } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { ClosingFrameDialog cf = new ClosingFrameDialog(); } }); } } </code></pre>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload