Autocomplete JComboBox with image

[anchit pancholi]

Hi,

i am using JComboBox which have product name product image, to make it autocomplete i used below listener but name and image in drop down is not getting highlight :-

JTextComponent editor = (JTextComponent) comboBox.getEditor().getEditorComponent();
        editor.setDocument( new PlainDocument(){
        	
            public void remove(int offs, int len) throws BadLocationException {
                
                if (selecting) return;
                super.remove(offs, len);
            }
            
            public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
             
                if (selecting) return;
                super.insertString(offs, str, a);
                Object item = lookupItem(getText(0, getLength()));
                if (item != null) {
                    setSelectedItem(item);
                } else {
                    item = comboBox.getSelectedItem();
                    offs = offs-str.length();
                    comboBox.getToolkit().beep(); 
                }
                setText(item.toString());
                // select the completed part
                highlightCompletedText(offs+str.length());
            }
            
            private void setText(String text) {
                try {
                    super.remove(0, getLength());
                    super.insertString(0, text, null);
                } catch (BadLocationException e) {
                    throw new RuntimeException(e.toString());
                }
            }
            
            private void highlightCompletedText(int start) {
            	System.out.println(" getLength() "+getLength());
            	getlen = getLength();
                editor.setCaretPosition(getLength());
                editor.moveCaretPosition(start);
            }
            
            private void setSelectedItem(Object item) {
                selecting = true;
                
                comboBox.setSelectedItem(item);
                selecting = false;
            }
            
            private Object lookupItem(String pattern) {
                Object selectedItem = comboBox.getSelectedItem();
                System.out.println(" selectedItem is :- "+selectedItem);
                if (selectedItem != null && startsWithIgnoreCase(selectedItem.toString(), pattern)) {
                    return selectedItem;
                } else {
                    for (int i=0, n=name.length; i < n; i++) {
                        Object currentItem = name[i];
                        System.out.println(" currentItem is :- "+currentItem);
                        if (startsWithIgnoreCase(currentItem.toString(), pattern)) {
                            return currentItem;
                        }
                    }
                }
                return null;
            }
            private boolean startsWithIgnoreCase(String str1, String str2) {
                return str1.toUpperCase().startsWith(str2.toUpperCase());
            }
        	
        });
        comboBox.addActionListener(new ActionListener() {
        	
        	
            public void actionPerformed(ActionEvent e) {
               // if (!selecting) highlightCompletedText(0);
            	String item = (String) comboBox.getSelectedItem();
            	
            	if (item!=null) highlightCompletedText(0);
            	
            }
            private void highlightCompletedText(int start) {
            	String item = (String) comboBox.getSelectedItem();
            	//editor.setCaretPosition(getlen);
                editor.moveCaretPosition(start);
            }
        });
        editor.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
            	System.out.println(" ------- Key --------");
            	if (comboBox.isDisplayable()) comboBox.setPopupVisible(true);
            }
        });

Please let me know if code is not complete to understand.

looks CaretPosition is not getting set properly due to image in JCombobox. Any idea how can i set Caret Position to correct index?

Thanks
Anchit

[m Korbel]

- no idea how Icon/ImageIcon(s) is/are ... , because there are three-four (correct) ways, leaving any guessing, comments

- I would not recommend to use KeyListener, KeyEvent for this job, nor for JTextComponents (derived Editor from JComboBox) every those event are manageable in DocumentListener, DocumentFilter

- start with AutoComplete JComboBox/JTextField or decorator/highlighter by SwingX

- with standard rendering as is described in Oracle tutorial aboout How to use ComboBoxes