Java tutorial
/* * Copyright 2012 Nabeel Mukhtar * * 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.appspot.socialinquirer.client.view; import java.util.Date; import com.appspot.socialinquirer.client.KeyProvider; import com.appspot.socialinquirer.client.constant.EverScribeConstants; import com.appspot.socialinquirer.shared.dto.Answer; import com.appspot.socialinquirer.shared.dto.Question; import com.google.gwt.cell.client.CheckboxCell; import com.google.gwt.cell.client.DateCell; import com.google.gwt.cell.client.SafeHtmlCell; import com.google.gwt.core.client.GWT; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlUtils; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.uibinder.client.UiTemplate; import com.google.gwt.user.cellview.client.CellTable; import com.google.gwt.user.cellview.client.Column; import com.google.gwt.user.cellview.client.SimplePager; import com.google.gwt.user.cellview.client.SimplePager.TextLocation; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Widget; import com.google.gwt.view.client.DefaultSelectionEventManager; import com.google.gwt.view.client.SelectionModel; import com.google.gwt.view.client.SingleSelectionModel; /** * The Class QuizViewImpl. */ public class QuizViewImpl extends Composite implements QuizView { /** The ui binder. */ private static QuizViewUiBinder uiBinder = GWT.create(QuizViewUiBinder.class); /** The presenter. */ private Presenter presenter; /** The question. */ private Question question; /** The answers table. */ @UiField(provided = true) CellTable<Answer> answersTable; /** The answers paginator. */ @UiField(provided = true) SimplePager answersPaginator; /** The question content. */ @UiField HTML questionTitle, questionContent; // menu items /** The constants. */ private EverScribeConstants constants; /** * The Interface QuizViewUiBinder. */ @UiTemplate("QuizView.ui.xml") interface QuizViewUiBinder extends UiBinder<Widget, QuizViewImpl> { } /** * Instantiates a new quiz view impl. * * @param constants the constants */ public QuizViewImpl(final EverScribeConstants constants) { this.constants = constants; answersTable = new CellTable<Answer>(); SimplePager.Resources ideasPagerResources = GWT.create(SimplePager.Resources.class); answersPaginator = new SimplePager(TextLocation.CENTER, ideasPagerResources, false, 0, true); answersPaginator.setDisplay(answersTable); final SelectionModel<Answer> answerSelectionModel = new SingleSelectionModel<Answer>( new KeyProvider<Answer>()); answersTable.setSelectionModel(answerSelectionModel, DefaultSelectionEventManager.<Answer>createCheckboxManager()); initTableColumns(answersTable, answerSelectionModel); initWidget(uiBinder.createAndBindUi(this)); } /* * (non-Javadoc) * * @see com.appspot.linkedhub.client.view.ProjectView#setName(java.lang.String) */ @Override public void setName(String name) { // TODO Auto-generated method stub } /* * (non-Javadoc) * * @see com.appspot.linkedhub.client.view.ProjectView#setPresenter(com.appspot.linkedhub.client.view.ProjectView.Presenter) */ @Override public void setPresenter(Presenter listener) { this.presenter = listener; } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.QuizView#setQuestion(com.appspot.socialinquirer.shared.dto.Question) */ @Override public void setQuestion(Question question) { this.question = question; if (question != null) { questionTitle.setHTML(question.getTitle()); questionContent.setHTML(question.getContent()); answersTable.setRowData(question.getAnswers()); } } /** * Inits the table columns. * * @param table the table * @param selectionModel the selection model */ private void initTableColumns(CellTable<Answer> table, final SelectionModel<Answer> selectionModel) { // Checkbox column. This table will uses a checkbox column for selection. // Alternatively, you can call cellTable.setSelectionEnabled(true) to enable // mouse selection. Column<Answer, Boolean> checkColumn = new Column<Answer, Boolean>(new CheckboxCell(true, false)) { @Override public Boolean getValue(Answer object) { // Get the value from the selection model. return selectionModel.isSelected(object); } }; table.addColumn(checkColumn, SafeHtmlUtils.fromSafeConstant("<br/>")); // Description. Column<Answer, SafeHtml> textColumn = new Column<Answer, SafeHtml>(new SafeHtmlCell()) { @Override public SafeHtml getValue(Answer object) { return SafeHtmlUtils.fromSafeConstant(object.getContent()); } }; table.addColumn(textColumn, constants.templatesTableColumnSummary()); // Status. Column<Answer, SafeHtml> authorColumn = new Column<Answer, SafeHtml>(new SafeHtmlCell()) { @Override public SafeHtml getValue(Answer object) { return SafeHtmlUtils.fromSafeConstant(object.getAuthor()); } }; table.addColumn(authorColumn, constants.templatesTableColumnAuthor()); // Due Date. Column<Answer, Date> dueDateColumn = new Column<Answer, Date>(new DateCell()) { @Override public Date getValue(Answer object) { return object.getPublishedDate(); } }; table.addColumn(dueDateColumn, constants.templatesTableColumnPostedDate()); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.QuizView#getQuestion() */ @Override public Question getQuestion() { return question; } }