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POBlackBerry 6: ListFieldCallback.indexOfList() - how to filter while typing?
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copied!<p>I'm trying to display a TextField and a ListField below it:</p> <p><img src="https://i.stack.imgur.com/5DVIO.png" alt="enter image description here"></p> <p>And I would like to filter (aka "live search") the number of displayed rows, while the user is typing a word into the TextField.</p> <p>I've tried calling <a href="http://www.blackberry.com/developers/docs/4.6.0api/net/rim/device/api/ui/component/ListField.html#setSearchable%28boolean%29" rel="nofollow noreferrer">ListField.setSearchable(true)</a> but it doesn't change anything, even if I type words while having the ListField focussed.</p> <p>And by the way I wonder which TextField to take. I've used AutoCompleteField because it looks exactly as I want the field to be (white field with rounded corners), but it is probably not the best choice (because I don't need AutoCompleteField's drop down list while typing).</p> <p>Here is my current code -</p> <p><strong>MyScreen.java:</strong></p> <pre><code>private ListField presetListField = new ListField(); private MyList presetList = new MyList(presetListField); private MyScreen() { int size; getMainManager().setBackground(_bgOff); setTitle("Favorites"); BasicFilteredList filterList = new BasicFilteredList(); String[] days = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"}; int uniqueID = 0; filterList.addDataSet(uniqueID, days, "days", BasicFilteredList.COMPARISON_IGNORE_CASE); // XXX probably a bad choice here? AutoCompleteField autoCompleteField = new AutoCompleteField(filterList); add(autoCompleteField); presetListField.setEmptyString("* No Favorites *", DrawStyle.HCENTER); add(presetListField); presetList.insert("Monday"); presetList.insert("Tuesday"); presetList.insert("Wednesday"); for (int i = 0; i < 16; i++) { presetList.insert("Favorite #" + (1 + i)); } } </code></pre> <p><strong>MyList.java:</strong></p> <pre><code>public class MyList implements ListFieldCallback { private Vector _preset = new Vector(); private ListField _list; public MyList(ListField list) { _list = list; _list.setCallback(this); _list.setRowHeight(-2); // XXX does not seem to have any effect _list.setSearchable(true); } public void insert(String str) { insert(str, _preset.size()); } public void insert(String str, int index) { _preset.insertElementAt(str, index); _list.insert(index); } public void delete(int index) { _preset.removeElementAt(index); _list.delete(index); } public void drawListRow(ListField listField, Graphics g, int index, int y, int width) { Font f = g.getFont(); Font b = f.derive(Font.BOLD, f.getHeight() * 2); Font i = f.derive(Font.ITALIC, f.getHeight()); g.setColor(Color.WHITE); g.drawText((String)_preset.elementAt(index), Display.getWidth()/3, y); g.setFont(i); g.setColor(Color.GRAY); g.drawText("Click to get frequency", Display.getWidth()/3, y + g.getFont().getHeight()); g.setFont(b); g.setColor(Color.YELLOW); g.drawText(String.valueOf(100f + index/10f), 0, y); } public Object get(ListField list, int index) { return _preset.elementAt(index); } public int indexOfList(ListField list, String prefix, int start) { return _preset.indexOf(prefix, start); } public int getPreferredWidth(ListField list) { return Display.getWidth(); } } </code></pre> <p>Thank you! Alex</p>

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