| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Licensed 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 com.google.gwt.examples.view; |
| |
| import com.google.gwt.cell.client.TextCell; |
| import com.google.gwt.core.client.EntryPoint; |
| import com.google.gwt.user.cellview.client.CellList; |
| import com.google.gwt.user.cellview.client.SimplePager; |
| import com.google.gwt.user.client.ui.RootPanel; |
| import com.google.gwt.user.client.ui.VerticalPanel; |
| import com.google.gwt.view.client.Range; |
| import com.google.gwt.view.client.RangeChangeEvent; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Example of using a {@link RangeChangeEvent.Handler} to push data into a |
| * {@link CellList} when the range changes. |
| */ |
| public class RangeChangeHandlerExample implements EntryPoint { |
| |
| @Override |
| public void onModuleLoad() { |
| // Create a CellList. |
| final CellList<String> cellList = new CellList<String>(new TextCell()); |
| |
| // Add a range change handler. |
| cellList.addRangeChangeHandler(new RangeChangeEvent.Handler() { |
| @Override |
| public void onRangeChange(RangeChangeEvent event) { |
| Range range = event.getNewRange(); |
| int start = range.getStart(); |
| int length = range.getLength(); |
| |
| // Create the data to push into the view. At this point, you could send |
| // an asynchronous RPC request to a server. |
| List<String> data = new ArrayList<String>(); |
| for (int i = start; i < start + length; i++) { |
| data.add("Item " + i); |
| } |
| |
| // Push the data into the list. |
| cellList.setRowData(start, data); |
| } |
| }); |
| |
| // Force the cellList to fire an initial range change event. |
| cellList.setVisibleRangeAndClearData(new Range(0, 25), true); |
| |
| // Create paging controls. |
| SimplePager pager = new SimplePager(); |
| pager.setDisplay(cellList); |
| |
| // Add the widgets to the root panel. |
| VerticalPanel vPanel = new VerticalPanel(); |
| vPanel.add(pager); |
| vPanel.add(cellList); |
| RootPanel.get().add(vPanel); |
| } |
| } |