Java tutorial
/** * @author Nigel Cook * * (C) Copyright 2010-2012. Nigel Cook. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * Licensed under the terms described in LICENSE file that accompanied this code, (the "License"); you may not use this file * except in compliance with the License. * * 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 n3phele.client.view; import java.util.ArrayList; import java.util.List; import n3phele.client.N3phele; import n3phele.client.model.Repository; import n3phele.client.presenter.RepoListActivity; import n3phele.client.presenter.helpers.AuthenticatedRequestFactory; import n3phele.client.resource.ClickableCellTableResource; import n3phele.client.widgets.ActionDialogBox; import n3phele.client.widgets.CancelButtonCell; import n3phele.client.widgets.MenuItem; import n3phele.client.widgets.WorkspaceVerticalPanel; import com.google.gwt.user.cellview.client.CellTable; import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy; import com.google.gwt.user.cellview.client.TextColumn; import com.google.gwt.view.client.SelectionChangeEvent; import com.google.gwt.view.client.SingleSelectionModel; import com.google.gwt.user.cellview.client.Column; import com.google.gwt.user.client.Window; import com.google.gwt.cell.client.ActionCell.Delegate; import com.google.gwt.core.client.GWT; import com.google.gwt.http.client.Request; import com.google.gwt.http.client.RequestBuilder; import com.google.gwt.http.client.RequestCallback; import com.google.gwt.http.client.RequestException; import com.google.gwt.http.client.Response; public class RepoListView extends WorkspaceVerticalPanel { private CellTable<Repository> cellTable; private List<Repository> data = null; private RepoListActivity repositoryListActivity = null; private ActionDialogBox<Repository> dialog = null; private static ClickableCellTableResource resource = null; public RepoListView() { super(new MenuItem(N3phele.n3pheleResource.repositoryIcon(), "File Repositories", null), new MenuItem( N3phele.n3pheleResource.repositoryAddIcon(), "create a new repository", "repository:")); if (resource == null) resource = GWT.create(ClickableCellTableResource.class); cellTable = new CellTable<Repository>(15, resource); cellTable.setSize("455px", ""); //this.scrollPanel.add(this.cellTable); TextColumn<Repository> nameColumn = new TextColumn<Repository>() { @Override public String getValue(Repository item) { String result = ""; if (item != null) return item.getName(); return result; } }; cellTable.addColumn(nameColumn, "Name"); TextColumn<Repository> descriptionColumn = new TextColumn<Repository>() { @Override public String getValue(Repository item) { String result = ""; if (item != null) return item.getDescription(); return result; } }; cellTable.addColumn(descriptionColumn, "Description"); // Add a selection model to handle user selection. final SingleSelectionModel<Repository> selectionModel = new SingleSelectionModel<Repository>(); cellTable.setSelectionModel(selectionModel); selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() { public void onSelectionChange(SelectionChangeEvent event) { Repository selected = selectionModel.getSelectedObject(); if (selected != null) { if (repositoryListActivity != null) { repositoryListActivity.onSelect(selected); } } } }); cellTable.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.DISABLED); this.add(cellTable); Column<Repository, Repository> cancelColumn = new Column<Repository, Repository>( new CancelButtonCell<Repository>(new Delegate<Repository>() { @Override public void execute(Repository value) { if (value != null) { cellTable.getSelectionModel().setSelected(value, false); getDialog(value).show(); } } }, "remove repository")) { @Override public Repository getValue(Repository object) { return object; } }; cellTable.addColumn(cancelColumn); cellTable.setColumnWidth(cancelColumn, "26px"); } final private static List<Repository> nullList = new ArrayList<Repository>(0); public void setDisplayList(List<Repository> list) { if (list == null) { list = nullList; } this.data = list; this.cellTable.setRowData(this.data); } public void setPresenter(RepoListActivity repositoryListActivity) { this.repositoryListActivity = repositoryListActivity; } public void refresh(List<Repository> newProgressList) { setDisplayList(newProgressList); } public void refresh(int i, Repository update) { this.cellTable.setRowData(i, data.subList(i, i + 1)); } protected ActionDialogBox<Repository> getDialog(Repository item) { if (dialog == null) { dialog = new ActionDialogBox<Repository>("Remove Repository Confirmation", "No", "Yes", new Delegate<Repository>() { @Override public void execute(Repository object) { kill(object.getUri()); } }); dialog.setGlassEnabled(true); dialog.setAnimationEnabled(true); } dialog.setValue("Remove repository \"" + item.getName() + "\"?<p>" + "The contents of the repository store will not be affected.", item); dialog.center(); return dialog; } private void kill(String uri) { String url = uri; // Send request to server and catch any errors. RequestBuilder builder = AuthenticatedRequestFactory.newRequest(RequestBuilder.DELETE, url); try { builder.sendRequest(null, new RequestCallback() { public void onError(Request request, Throwable exception) { Window.alert("Couldn't delete " + exception.getMessage()); } public void onResponseReceived(Request request, Response response) { if (204 == response.getStatusCode()) { if (RepoListView.this.repositoryListActivity != null) RepoListView.this.repositoryListActivity.getRepositoryList(); } else { Window.alert("Couldn't delete (" + response.getStatusText() + ")"); } } }); } catch (RequestException e) { Window.alert("Couldn't delete " + e.getMessage()); } } }