/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pivot.tutorials.lists;
import java.net.URL;
import org.apache.pivot.beans.Bindable;
import org.apache.pivot.collections.Map;
import org.apache.pivot.collections.Sequence;
import org.apache.pivot.util.Resources;
import org.apache.pivot.wtk.Label;
import org.apache.pivot.wtk.ListView;
import org.apache.pivot.wtk.ListViewSelectionListener;
import org.apache.pivot.wtk.Span;
import org.apache.pivot.wtk.Window;
import org.apache.pivot.wtk.content.ListItem;
public class ListViews extends Window implements Bindable {
private Label selectionLabel = null;
private ListView listView = null;
@Override
public void initialize(Map<String, Object> namespace, URL location, Resources resources) {
selectionLabel = (Label)namespace.get("selectionLabel");
listView = (ListView)namespace.get("listView");
listView.getListViewSelectionListeners().add(new ListViewSelectionListener() {
@Override
public void selectedRangeAdded(ListView listView, int rangeStart, int rangeEnd) {
updateSelection(listView);
}
@Override
public void selectedRangeRemoved(ListView listView, int rangeStart, int rangeEnd) {
updateSelection(listView);
}
@Override
public void selectedRangesChanged(ListView listView, Sequence<Span> previousSelectedRanges) {
if (previousSelectedRanges != null
&& previousSelectedRanges != listView.getSelectedRanges()) {
updateSelection(listView);
}
}
@Override
public void selectedItemChanged(ListView listView, Object previousSelectedItem) {
// No-op
}
private void updateSelection(ListView listView) {
String selectionText = "";
Sequence<Span> selectedRanges = listView.getSelectedRanges();
for (int i = 0, n = selectedRanges.getLength(); i < n; i++) {
Span selectedRange = selectedRanges.get(i);
for (int j = selectedRange.start;
j <= selectedRange.end;
j++) {
if (selectionText.length() > 0) {
selectionText += ", ";
}
Object item = listView.getListData().get(j);
String text;
if (item instanceof ListItem) { // item is a listItem (for example because it has an image)
text = ((ListItem) item).getText();
} else { // item is a standard item for listData
text = item.toString();
}
selectionText += text;
}
}
selectionLabel.setText(selectionText);
}
});
}
}