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 com.appspot.socialinquirer.client.HistoryToken; import com.appspot.socialinquirer.client.KeyProvider; import com.appspot.socialinquirer.client.constant.EverScribeConstants; import com.appspot.socialinquirer.client.util.UiUtils; import com.appspot.socialinquirer.shared.dto.Message; import com.appspot.socialinquirer.shared.dto.NamedBean; import com.appspot.socialinquirer.shared.dto.Page; import com.appspot.socialinquirer.shared.dto.Poll; import com.appspot.socialinquirer.shared.dto.Quiz; import com.appspot.socialinquirer.shared.dto.Task; import com.google.gwt.cell.client.CheckboxCell; import com.google.gwt.cell.client.ClickableTextCell; import com.google.gwt.cell.client.SafeHtmlCell; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ClickEvent; 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.ui.Composite; 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 ActivityViewImpl. */ public class ActivityViewImpl extends Composite implements ActivityView { /** The ui binder. */ private static ActivityViewUiBinder uiBinder = GWT.create(ActivityViewUiBinder.class); /** The presenter. */ private Presenter presenter; /** The name. */ private String name; /** The constants. */ private EverScribeConstants constants; /** The activities table. */ @UiField(provided = true) CellTable<NamedBean> activitiesTable; /** The activities paginator. */ @UiField(provided = true) SimplePager activitiesPaginator; /** The data provider. */ private ListDataProvider<NamedBean> dataProvider; /** * The Interface ActivityViewUiBinder. */ @UiTemplate("ActivityView.ui.xml") interface ActivityViewUiBinder extends UiBinder<Widget, ActivityViewImpl> { } /** * Instantiates a new activity view impl. * * @param constants the constants * @param master the master */ public ActivityViewImpl(final EverScribeConstants constants, final boolean master) { this.constants = constants; activitiesTable = new CellTable<NamedBean>(); SimplePager.Resources linkedHubPagerResources = GWT.create(SimplePager.Resources.class); activitiesPaginator = new SimplePager(TextLocation.CENTER, linkedHubPagerResources, false, 0, true); activitiesPaginator.setDisplay(activitiesTable); activitiesPaginator.setPageSize(5); activitiesTable.setPageSize(5); final SelectionModel<NamedBean> activitiesSelectionModel = new SingleSelectionModel<NamedBean>( new KeyProvider<NamedBean>()); activitiesTable.setSelectionModel(activitiesSelectionModel, DefaultSelectionEventManager.<NamedBean>createCheckboxManager()); initTableColumns(activitiesTable, activitiesSelectionModel); initWidget(uiBinder.createAndBindUi(ActivityViewImpl.this)); } /* * (non-Javadoc) * * @see com.appspot.linkedhub.client.view.ProjectView#setName(java.lang.String) */ @Override public void setName(String name) { this.name = name; } /* * (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; } /** * On add clicked. * * @param e the e */ @UiHandler("addButton") void onAddClicked(ClickEvent e) { if (name.equals(HistoryToken.Activity_Polls.token())) { presenter.onAddPollClicked(); } else if (name.equals(HistoryToken.Activity_Quizzes.token())) { presenter.onAddQuizzClicked(); } else if (name.equals(HistoryToken.Activity_Tasks.token())) { presenter.onAddTaskClicked(); } } /** * On view clicked. * * @param e the e */ @UiHandler("viewButton") void onViewClicked(ClickEvent e) { if (name.equals(HistoryToken.Activity_Polls.token())) { presenter.onViewPollClicked((Poll) getSelectedObject()); } else if (name.equals(HistoryToken.Activity_Quizzes.token())) { presenter.onViewQuizzClicked((Quiz) getSelectedObject()); } else if (name.equals(HistoryToken.Activity_Tasks.token())) { presenter.onViewTaskClicked((Task) getSelectedObject()); } else if (name.equals(HistoryToken.Activity_Messages.token()) || name.equals(HistoryToken.Activity_Endorsements.token())) { presenter.onViewMessageClicked((Message) getSelectedObject()); } } /** * On remove clicked. * * @param e the e */ void onRemoveClicked(ClickEvent e) { if (name.equals(HistoryToken.Activity_Tasks.token())) { presenter.onRemoveTaskClicked((Task) getSelectedObject()); } else { UiUtils.showErrorDialog(constants, "You cannot remove this object."); } } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#setTasks(java.util.ArrayList) */ @Override public void setTasks(ArrayList<Task> tasks) { ArrayList<NamedBean> activities = new ArrayList<NamedBean>(); for (Task task : tasks) { activities.add(task); } dataProvider = new ListDataProvider<NamedBean>(activities); dataProvider.addDataDisplay(activitiesTable); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#setPolls(java.util.ArrayList) */ @Override public void setPolls(ArrayList<Poll> polls) { ArrayList<NamedBean> activities = new ArrayList<NamedBean>(); for (Poll poll : polls) { activities.add(poll); } dataProvider = new ListDataProvider<NamedBean>(activities); dataProvider.addDataDisplay(activitiesTable); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#setQuizzes(java.util.ArrayList) */ @Override public void setQuizzes(ArrayList<Quiz> quizzes) { ArrayList<NamedBean> activities = new ArrayList<NamedBean>(); for (Quiz quiz : quizzes) { activities.add(quiz); } dataProvider = new ListDataProvider<NamedBean>(activities); dataProvider.addDataDisplay(activitiesTable); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#setPages(java.util.ArrayList) */ @Override public void setPages(ArrayList<Page> pages) { ArrayList<NamedBean> activities = new ArrayList<NamedBean>(); for (Page task : pages) { activities.add(task); } dataProvider = new ListDataProvider<NamedBean>(activities); dataProvider.addDataDisplay(activitiesTable); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#setMessages(java.util.ArrayList) */ @Override public void setMessages(ArrayList<Message> message) { ArrayList<NamedBean> activities = new ArrayList<NamedBean>(); for (Message quiz : message) { activities.add(quiz); } dataProvider = new ListDataProvider<NamedBean>(activities); dataProvider.addDataDisplay(activitiesTable); } /** * Gets the selected object. * * @return the selected object */ private NamedBean getSelectedObject() { for (NamedBean object : activitiesTable.getVisibleItems()) { if (activitiesTable.getSelectionModel().isSelected(object)) { return object; } } return null; } /** * Inits the table columns. * * @param table the table * @param selectionModel the selection model */ private void initTableColumns(CellTable<NamedBean> table, final SelectionModel<NamedBean> selectionModel) { // Checkbox column. This table will uses a checkbox column for // selection. // Alternatively, you can call cellTable.setSelectionEnabled(true) to // enable // mouse selection. Column<NamedBean, Boolean> checkColumn = new Column<NamedBean, Boolean>(new CheckboxCell(true, false)) { @Override public Boolean getValue(NamedBean object) { // Get the value from the selection model. return selectionModel.isSelected(object); } }; table.addColumn(checkColumn, SafeHtmlUtils.fromSafeConstant("<br/>")); // Name. Column<NamedBean, String> nameColumn = new Column<NamedBean, String>(new ClickableTextCell()) { @Override public String getValue(NamedBean object) { return object.getName(); } }; table.addColumn(nameColumn, constants.templatesTableColumnName()); // Headline. // Column<NamedBean, String> tagsColumn = new Column<NamedBean, String>( // new ClickableTextCell()) { // @Override // public String getValue(NamedBean object) { // StringBuilder builder = new StringBuilder(); // for (String tag : object.getTags()) { // builder.append(tag).append(" "); // } // return builder.toString(); // // } // }; // table.addColumn(tagsColumn, constants.templatesTableColumnTags()); // Description Column<NamedBean, SafeHtml> descColumn = new Column<NamedBean, SafeHtml>(new SafeHtmlCell()) { @Override public SafeHtml getValue(NamedBean object) { SafeHtmlBuilder builder = new SafeHtmlBuilder(); builder.appendHtmlConstant(object.getDescription()); return builder.toSafeHtml(); } }; table.addColumn(descColumn, constants.templatesTableColumnSummary()); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#addPolls(java.util.ArrayList) */ @Override public void addPolls(ArrayList<Poll> polls) { dataProvider.getList().addAll(polls); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#addQuizzes(java.util.ArrayList) */ @Override public void addQuizzes(ArrayList<Quiz> quizzes) { dataProvider.getList().addAll(quizzes); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#addTasks(java.util.ArrayList) */ @Override public void addTasks(ArrayList<Task> tasks) { dataProvider.getList().addAll(tasks); } /* (non-Javadoc) * @see com.appspot.socialinquirer.client.view.ActivityView#removeTasks(java.util.ArrayList) */ @Override public void removeTasks(ArrayList<Task> tasks) { dataProvider.getList().removeAll(tasks); } }