Place a component over another

Question

Hello World !
First: sorry for my bad english.....
This is a great Forum with a lot of answers but I was not able to find my problem :(
I have a JTable with editable cells. Each Cell contains a CarretListener for quick validation of the entered text. But in one special cell you should be able to select entrys out of a list. The List is generated when you enter a text. The Programm serach in a list for entrys equal so the entered text, like google suggest. So far its all good. But i dont get it how to show the list at the right position. I tried the GlassPane but this doesn't work so well. I have problems to get the Cordinates of the cell and to show the JList.
Set the row height so show the whole list also dosn't work because i don't want to change the whole row.
Maybe there is a trick in the TableCellRenderer or so...?
I don't want a complete sourcecode or so, but a I need a push in the right direction.
Here is a pic of the programm: [http://img198.imageshack.us/img198/3227/sosollsseinh.jpg]
Thanks for your attention
Marc
Edited by: MercT on Nov 10, 2009 12:30 AM

Answer 1

hii,
that's ... http://www.java2s.com
private ArrayList<String> defListCities = new ArrayList<String>();
private final CityComboBox defCityCombo = new CityComboBox(defListCities);
//or
private ArrayList<String> defListCities = new ArrayList<String>();
private final CitiesTextField defCityTextField = new CitiesTextField(defListCities);
//or as needed
//defCityTextField.setDataList(defListCities);
//defCityTextField.setStrict(false);
import java.util.List;
import javax.swing.JTextField;
import javax.swing.text.*;
public class CitiesTextField extends JTextField {
    private static final long serialVersionUID = 1L;
    class AutoDocument extends PlainDocument {
        private static final long serialVersionUID = 1L;
        @Override
        public void replace(int i, int j, String s, AttributeSet attributeset) throws BadLocationException {
            super.remove(i, j);
            insertString(i, s, attributeset);
        @Override
        public void insertString(int i, String s, AttributeSet attributeset) throws BadLocationException {
            if (s == null || "".equals(s)) {
                return;
            String s1 = getText(0, i);
            String s2 = getMatch(s1 + s);
            int j = (i + s.length()) - 1;
            if (isStrict && s2 == null) {
                s2 = getMatch(s1);
                j--;
            } else if (!isStrict && s2 == null) {
                super.insertString(i, s, attributeset);
                return;
            if (citiesComboBox != null && s2 != null) {
                citiesComboBox.setSelectedValue(s2);
            super.remove(0, getLength());
            super.insertString(0, s2, attributeset);
            setSelectionStart(j + 1);
            //setSelectionStart(0);
            setSelectionEnd(getLength());
        @Override
        public void remove(int i, int j) throws BadLocationException {
            int k = getSelectionStart();
            if (k > 0) {
                k--;
            String s = getMatch(getText(0, k));
            if (!isStrict && s == null) {
                super.remove(i, j);
            } else {
                super.remove(0, getLength());
                super.insertString(0, s, null);
            if (citiesComboBox != null && s != null) {
                citiesComboBox.setSelectedValue(s);
            try {
                setSelectionStart(k);
                setSelectionEnd(getLength());
            } catch (Exception exception) {
    public CitiesTextField(List<String> list) {
        isCaseSensitive = false;
        isStrict = true;
        isStrict = false;
        citiesComboBox = null;
        if (list == null) {
            throw new IllegalArgumentException("values can not be null");
        } else {
            dataList = list;
            init();
            return;
    CitiesTextField(List<String> list, CitiesComboBox b) {
        isCaseSensitive = false;
        isStrict = true;
        isStrict = false;
        citiesComboBox = null;
        if (list == null) {
            throw new IllegalArgumentException("values can not be null");
        } else {
            dataList = list;
            citiesComboBox = b;
            init();
            return;
    private void init() {
        setDocument(new AutoDocument());
        if (isStrict && dataList.size() > 0) {
            setText(dataList.get(0).toString());
    private String getMatch(String s) {
        for (int i = 0; i < dataList.size(); i++) {
            String s1 = dataList.get(i).toString();
            if (s1 != null) {
                if (!isCaseSensitive && s1.toLowerCase().startsWith(s.toLowerCase())) {
                    return s1;
                if (isCaseSensitive && s1.startsWith(s)) {
                    return s1;
        return null;
    @Override
    public void replaceSelection(String s) {
        AutoDocument _lb = (AutoDocument) getDocument();
        if (_lb != null) {
            try {
                int i = Math.min(getCaret().getDot(), getCaret().getMark());
                int j = Math.max(getCaret().getDot(), getCaret().getMark());
                _lb.replace(i, j - i, s, null);
            } catch (Exception exception) {
    public boolean isCaseSensitive() {
        return isCaseSensitive;
    public void setCaseSensitive(boolean flag) {
        isCaseSensitive = flag;
    public boolean isStrict() {
        return isStrict;
    public void setStrict(boolean flag) {
        isStrict = flag;
    public List<String> getDataList() {
        return dataList;
    public void setDataList(List<String> list) {
        if (list == null) {
            throw new IllegalArgumentException("values can not be null");
        } else {
            dataList = list;
            return;
    private List<String> dataList;
    private boolean isCaseSensitive;
    private boolean isStrict;
    private CitiesComboBox citiesComboBox;
} to be continued for chained combo def.