我怎样才能在 Java 中获得插入符号 position

Question

I want to have the X and Y position of the caret of my JTextPane.

Here is what i have now:

Rectangle2D rectangle = textPane.modelToView2D(textPane.getCaretPosition());
popupMenu.show(frame, (int)rectangle.getX(), 80 + (int)rectangle.getY());

This code is from: https://stackoverflow.com/a/18864392/14911094

But there is a problem with it!

This is ok but i also have a scroll pane with the JTextPane (this is code for the JFrame constructor):

editorPane = new JTextPane();
JScrollPane scrollPane = new JScrollPane(editorPane);
this.setLayout(new GridLayout(1, 1, 0, 0));
this.add(scrollPane);

And the code to show the popupmenu is being called by another function in a diff class:

popupMenu.removeAll();
for (String item : stringItems)
    popupMenu.add(new JMenuItem(item));
Rectangle2D rectangle = editorPane.modelToView2D(editorPane.getCaretPosition());`
popupMenu.show(frame, (int)rectangle.getX(), 80 + (int)rectangle.getY());
popupMenu.updateUI();

So when i get down to lower lines the popup moves out of screen as the rectangle.getY() is very high.

How can i solve this problem!

Here is a minimal reproducible example:

public class Try {
    public static void main(String args[]) throws Exception {
        JFrame frame = new JFrame();
        JTextPane textPane = new JTextPane();
        JScrollPane pane = new JScrollPane(textPane);
        JPopupMenu popupMenu = new JPopupMenu();
        textPane.setText("SOME RANDOME TEXT FHDFFHNGHNFKJ!");
        textPane.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                try {
                    Rectangle2D rectangle = textPane.modelToView2D(textPane.getCaretPosition());
                    popupMenu.show(frame, (int) rectangle.getX(), 80 + (int) rectangle.getY());
                } catch (Exception ex) {}
                frame.requestFocus();
                frame.requestFocusInWindow();
                textPane.requestFocusInWindow();
            }
        });
        String itms[] = {
            "HI",
            "Hello"
        };
        ArrayList < String > items = new ArrayList < > (Arrays.asList(itms));
        for (String item: items)
            popupMenu.add(new JMenuItem(item));
        frame.add(pane);
        frame.setSize(900, 500);
        frame.setVisible(true);
    }
}

Answer 1

The answer was suggested by https://stackoverflow.com/users/131872/camickr is the comments!

The problem with my code was that I was showing the popupmenu with respect to the frame instead of the textPane

Here would be a solution.

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.util.*;

public class Try {
    public static final int CARET_HEIGHT = 15;
    public static void main(String args[]) throws Exception {
        JFrame frame = new JFrame();
        JTextPane textPane = new JTextPane();
        JScrollPane pane = new JScrollPane(textPane);
        JPopupMenu popupMenu = new JPopupMenu();
        textPane.setText("SOME RANDOME TEXT FHDFFHNGHNFKJ!");
        textPane.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                try {
                    Rectangle2D rectangle = ((JTextPane)(e.getSource())).modelToView2D(textPane.getCaretPosition());
                    popupMenu.show(((JTextPane)(e.getSource())), (int) rectangle.getX(), CARET_HEIGHT + (int) rectangle.getY());
                } catch (Exception ex) {}
                frame.requestFocus();
                frame.requestFocusInWindow();
                textPane.requestFocusInWindow();
            }
        });
        String itms[] = {
            "HI",
            "Hello"
        };
        ArrayList < String > items = new ArrayList < > (Arrays.asList(itms));
        for (String item: items)
            popupMenu.add(new JMenuItem(item));
        frame.add(pane);
        frame.setSize(900, 500);
        frame.setVisible(true);
    }
}