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.ArrayList; import java.util.Date; import com.appspot.socialinquirer.client.KeyProvider; import com.appspot.socialinquirer.client.constant.EverScribeConstants; import com.appspot.socialinquirer.shared.TextLanguage; import com.appspot.socialinquirer.shared.dto.Classifier; import com.appspot.socialinquirer.shared.dto.Message; import com.appspot.socialinquirer.shared.dto.Question; import com.appspot.socialinquirer.shared.dto.Quiz; 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.cell.client.TextCell; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.KeyCodes; import com.google.gwt.event.dom.client.KeyPressEvent; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; 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.UiHandler; 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.Command; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.HTMLPanel; import com.google.gwt.user.client.ui.MenuBar; import com.google.gwt.user.client.ui.MenuItem; import com.google.gwt.user.client.ui.SuggestBox; import com.google.gwt.user.client.ui.Widget; import com.google.gwt.view.client.DefaultSelectionEventManager; import com.google.gwt.view.client.ListDataProvider; import com.google.gwt.view.client.SelectionModel; import com.google.gwt.view.client.SingleSelectionModel; /** * The Class HomeViewImpl. */ public class HomeViewImpl extends Composite implements HomeView { /** The ui binder. */ private static HomeViewUiBinder uiBinder = GWT.create(HomeViewUiBinder.class); /** The presenter. */ private Presenter presenter; /** The questions table. */ @UiField(provided = true) CellTable<Question> questionsTable; /** The questions paginator. */ @UiField(provided = true) SimplePager questionsPaginator; /** The questions search box. */ @UiField(provided = true) SuggestBox questionsSearchBox; /** The templates table. */ @UiField(provided = true) CellTable<Message> templatesTable; /** The templates paginator. */ @UiField(provided = true) SimplePager templatesPaginator; /** The data provider. */ private ListDataProvider<Message> dataProvider; /** The questions search. */ @UiField Button questionsSearch; /** The feeds. */ @UiField HTMLPanel searchResults, introduction, feeds; // menu items /** The run code menu. */ @UiField MenuItem viewMenu, analyzeMenu, summarizeMenu, suggestAnswerMenu, spellCheckMenu, speakMenu, runCodeMenu; /** The classifier bar. */ @UiField MenuBar quizBar, languageBar, classifierBar; /** The constants. */ private EverScribeConstants constants; /** * The Interface HomeViewUiBinder. */ @UiTemplate("HomeView.ui.xml") interface HomeViewUiBinder extends UiBinder<Widget, HomeViewImpl> { } /** * Instantiates a new home view impl. * * @param constants the constants * @param oracle the oracle */ public HomeViewImpl(final EverScribeConstants constants, SingleWordSuggestOracle oracle) { this.constants = constants; questionsTable = new CellTable<Question>(); SimplePager.Resources ideasPagerResources = GWT.create(SimplePager.Resources.class); questionsPaginator = new SimplePager(TextLocation.CENTER, ideasPagerResources, false, 0, true); questionsPaginator.setDisplay(questionsTable); final SelectionModel<Question> questionsSelectionModel = new SingleSelectionModel<Question>( new KeyProvider<Question>()); questionsTable.setSelectionModel(questionsSelectionModel, DefaultSelectionEventManager.<Question>createCheckboxManager()); initTableColumns(questionsTable, questionsSelectionModel); questionsSearchBox = new SuggestBox(oracle); templatesTable = new CellTable<Message>(); SimplePager.Resources linkedHubPagerResources = GWT.create(SimplePager.Resources.class); templatesPaginator = new SimplePager(TextLocation.CENTER, linkedHubPagerResources, false, 0, true); templatesPaginator.setPageSize(5); templatesTable.setPageSize(5); templatesPaginator.setDisplay(templatesTable); // final SelectionModel<Message> linkedHubConnectionsSelectionModel = new MultiSelectionModel<Message>( // new KeyProvider<Message>()); // templatesTable.setSelectionModel(linkedHubConnectionsSelectionModel, // DefaultSelectionEventManager.<Message>createCheckboxManager()); initTableColumns(templatesTable); initWidget(uiBinder.createAndBindUi(this)); searchResults.setVisible(false); introduction.setVisible(true); feeds.setVisible(false); viewMenu.setCommand(new Command() { @Override public void execute() { presenter.onViewClicked(getSelectedQuestion()); } }); // followMenu.setCommand(new Command() { // @Override // public void execute() { // presenter.onFollowClicked(getSelectedQuestion()); // } // }); analyzeMenu.setCommand(new Command() { @Override public void execute() { presenter.onAnalyzeClicked(getSelectedQuestion()); } }); summarizeMenu.setCommand(new Command() { @Override public void execute() { presenter.onSummarizeClicked(getSelectedQuestion()); } }); suggestAnswerMenu.setCommand(new Command() { @Override public void execute() { presenter.onSuggestAnswerClicked(getSelectedQuestion()); } }); spellCheckMenu.setCommand(new Command() { @Override public void execute() { presenter.onSpellCheckClicked(getSelectedQuestion()); } }); speakMenu.setCommand(new Command() { @Override public void execute() { presenter.onSpeakClicked(getSelectedQuestion()); } }); runCodeMenu.setCommand(new Command() { @Override public void execute() { presenter.onRunCodeClicked(getSelectedQuestion()); } }); for (final TextLanguage language : TextLanguage.values()) { MenuItem menuItem = new MenuItem(language.name(), new Command() { @Override public void execute() { presenter.onTranslateClicked(getSelectedQuestion(), language); } }); menuItem.setEnabled(true); languageBar.addItem(menuItem); } } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.HomeView#setClassifiers(java.util.ArrayList) */ public void setClassifiers(ArrayList<Classifier> classifiers) { for (final Classifier item : classifiers) { MenuItem menuItem = new MenuItem(item.getName(), new Command() { @Override public void execute() { presenter.onClassifyClicked(getSelectedQuestion(), item); } }); menuItem.setEnabled(true); classifierBar.addItem(menuItem); } } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.HomeView#setQuizzes(java.util.ArrayList) */ public void setQuizzes(ArrayList<Quiz> quizzes) { for (final Quiz item : quizzes) { MenuItem menuItem = new MenuItem(item.getName(), new Command() { @Override public void execute() { presenter.onAddToQuizClicked(getSelectedQuestion(), item); } }); menuItem.setEnabled(true); quizBar.addItem(menuItem); } } /** * On questions search box changed. * * @param e the e */ @UiHandler("questionsSearchBox") void onQuestionsSearchBoxChanged(KeyPressEvent e) { if (e.getCharCode() == ' ' || e.getCharCode() == KeyCodes.KEY_ENTER) { presenter.onQuestionsSearchPerformed(questionsSearchBox.getText()); } } /** * On search clicked. * * @param e the e */ @UiHandler("questionsSearch") void onSearchClicked(ClickEvent e) { presenter.onQuestionsSearchPerformed(questionsSearchBox.getText()); } /* * (non-Javadoc) * * @see com.appspot.linkedhub.client.view.ProjectView#setName(java.lang.String) */ @Override public void setIntroduction(String introduction) { // introductionText.setHTML(introduction); } /* (non-Javadoc) * @see com.appspot.linkedhub.client.view.TasksView#setQuestions(java.util.List) */ @Override public void setQuestions(ArrayList<Question> questions) { questionsTable.setRowData(questions); searchResults.setVisible(!questions.isEmpty()); introduction.setVisible(questions.isEmpty()); feeds.setVisible(false); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.HomeView#setMessages(java.util.ArrayList) */ @Override public void setMessages(ArrayList<Message> message) { templatesTable.setRowData(message); searchResults.setVisible(false); introduction.setVisible(message.isEmpty()); feeds.setVisible(!message.isEmpty()); } /* * (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; } /** * Gets the selected question. * * @return the selected question */ private Question getSelectedQuestion() { for (Question question : questionsTable.getVisibleItems()) { if (questionsTable.getSelectionModel().isSelected(question)) { return question; } } return null; } /** * Inits the table columns. * * @param table the table * @param selectionModel the selection model */ private void initTableColumns(CellTable<Question> table, final SelectionModel<Question> selectionModel) { // Checkbox column. This table will uses a checkbox column for selection. // Alternatively, you can call cellTable.setSelectionEnabled(true) to enable // mouse selection. Column<Question, Boolean> checkColumn = new Column<Question, Boolean>(new CheckboxCell(true, false)) { @Override public Boolean getValue(Question object) { // Get the value from the selection model. return selectionModel.isSelected(object); } }; table.addColumn(checkColumn, SafeHtmlUtils.fromSafeConstant("<br/>")); // Title. Column<Question, SafeHtml> titleColumn = new Column<Question, SafeHtml>(new SafeHtmlCell()) { @Override public SafeHtml getValue(Question object) { return SafeHtmlUtils.fromSafeConstant(object.getTitle()); } }; table.addColumn(titleColumn, constants.templatesTableColumnName()); // Description. Column<Question, SafeHtml> textColumn = new Column<Question, SafeHtml>(new SafeHtmlCell()) { @Override public SafeHtml getValue(Question object) { return SafeHtmlUtils.fromSafeConstant(object.getContent()); } }; table.addColumn(textColumn, constants.templatesTableColumnSummary()); // Due Date. Column<Question, Date> dueDateColumn = new Column<Question, Date>(new DateCell()) { @Override public Date getValue(Question object) { return object.getPublishedDate(); } }; table.addColumn(dueDateColumn, constants.templatesTableColumnTags()); } /** * Inits the table columns. * * @param table the table */ private void initTableColumns(CellTable<Message> table) { // Checkbox column. This table will uses a checkbox column for // selection. // Alternatively, you can call cellTable.setSelectionEnabled(true) to // enable // mouse selection. // Column<Message, Boolean> checkColumn = new Column<Message, Boolean>( // new CheckboxCell(true, false)) { // @Override // public Boolean getValue(Message object) { // // Get the value from the selection model. // return selectionModel.isSelected(object); // } // }; // table.addColumn(checkColumn, SafeHtmlUtils.fromSafeConstant("<br/>")); // Name. Column<Message, String> nameColumn = new Column<Message, String>(new TextCell()) { @Override public String getValue(Message object) { return object.getName(); } }; table.addColumn(nameColumn, constants.templatesTableColumnName()); // Headline. Column<Message, String> tagsColumn = new Column<Message, String>(new TextCell()) { @Override public String getValue(Message object) { StringBuilder builder = new StringBuilder(); builder.append(object.getRecipient().getDisplayName()); return builder.toString(); } }; table.addColumn(tagsColumn, constants.templatesTableColumnTags()); // Description Column<Message, SafeHtml> descColumn = new Column<Message, SafeHtml>(new SafeHtmlCell()) { @Override public SafeHtml getValue(Message object) { SafeHtmlBuilder builder = new SafeHtmlBuilder(); builder.appendHtmlConstant(object.getDescription()); return builder.toSafeHtml(); } }; table.addColumn(descColumn, constants.templatesTableColumnSummary()); } }