Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2012-2014 The OpenNMS Group, Inc. * OpenNMS(R) is Copyright (C) 1999-2014 The OpenNMS Group, Inc. * * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc. * * OpenNMS(R) is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * OpenNMS(R) is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with OpenNMS(R). If not, see: * http://www.gnu.org/licenses/ * * For more information contact: * OpenNMS(R) Licensing <license@opennms.org> * http://www.opennms.org/ * http://www.opennms.com/ *******************************************************************************/ package org.opennms.features.gwt.ksc.add.client.presenter; import java.util.ArrayList; import java.util.Collections; import java.util.List; import org.opennms.features.gwt.ksc.add.client.GraphInfo; import org.opennms.features.gwt.ksc.add.client.KscReport; import org.opennms.features.gwt.ksc.add.client.rest.DefaultKscReportService; import org.opennms.features.gwt.ksc.add.client.rest.KscReportService; import org.opennms.features.gwt.ksc.add.client.view.KscAddGraphView; import com.google.gwt.core.client.GWT; import com.google.gwt.dom.client.Style.Display; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.KeyCodeEvent; import com.google.gwt.event.dom.client.KeyCodes; import com.google.gwt.event.dom.client.KeyDownEvent; import com.google.gwt.event.dom.client.KeyUpEvent; import com.google.gwt.event.logical.shared.ResizeEvent; import com.google.gwt.event.logical.shared.ResizeHandler; import com.google.gwt.http.client.Request; import com.google.gwt.http.client.RequestCallback; import com.google.gwt.http.client.Response; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.HasWidgets; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.PopupPanel; public class KscAddGraphPresenter implements Presenter, KscAddGraphView.Presenter<KscReport> { private static final List<KscReport> EMPTY_KSCREPORT_LIST = Collections .unmodifiableList(new ArrayList<KscReport>()); private KscAddGraphView<KscReport> m_view; private List<KscReport> m_KscReports; private PopupPanel m_mainPopup; private final Image m_addImage; private GraphInfo m_graphInfo; private final KscReportService m_reportService = new DefaultKscReportService(); public KscAddGraphPresenter(final PopupPanel mainPopup, final KscAddGraphView<KscReport> addGraphView, final List<KscReport> kscReports, final GraphInfo graphInfo) { m_mainPopup = mainPopup; m_view = addGraphView; m_view.setPresenter(this); m_KscReports = kscReports; m_graphInfo = graphInfo; m_addImage = new Image("images/plus.gif"); m_addImage.setAltText("Add this graph to a KSC report."); m_addImage.setTitle("Add this graph to a KSC report."); } private List<KscReport> filterResultsByName(final String searchText) { final List<KscReport> list = new ArrayList<KscReport>(); for (final KscReport detail : m_KscReports) { if (detail.getLabel().toLowerCase().contains(searchText.toLowerCase())) { list.add(detail); } } return list; } @Override public void onKeyCodeEvent(final KeyCodeEvent<?> event, final String searchText) { final int keyCode = event.getNativeEvent().getKeyCode(); final boolean isKeyUp = event instanceof KeyUpEvent; final boolean isKeyDown = event instanceof KeyDownEvent; if (isKeyUp && keyCode == KeyCodes.KEY_ESCAPE) { GWT.log("escape, hiding results"); m_view.hidePopup(); } else if (isKeyUp && keyCode == KeyCodes.KEY_BACKSPACE && searchText.length() == 0) { m_view.hidePopup(); m_view.setDataList(EMPTY_KSCREPORT_LIST); m_view.clearSelection(); } else if (isKeyDown && keyCode == KeyCodes.KEY_ENTER && m_view.getSelectedReport() != null && m_view.getTitle() != null && !m_view.isPopupShowing()) { onAddButtonClicked(); } else if (isKeyUp) { if (searchText.length() == 0) { GWT.log("search text is empty"); m_view.setDataList(EMPTY_KSCREPORT_LIST); } else { GWT.log("search text is not empty"); final List<KscReport> results = filterResultsByName(searchText); if (keyCode == KeyCodes.KEY_ENTER && results.size() == 1) { m_view.hidePopup(); m_view.select(results.get(0)); } else { m_view.setDataList(results); m_view.showPopup(); m_view.clearSelection(); } } } } @Override public void onKscReportSelected() { GWT.log("selected report " + m_view.getSelectedReport().getId()); m_view.hidePopup(); } @Override public void onAddButtonClicked() { final String graphTitle = m_view.getTitle(); final int kscReportId = m_view.getSelectedReport().getId(); final String kscReportName = m_view.getSelectedReport().getLabel(); final String resourceId = m_graphInfo.getResourceId(); final String graphName = m_graphInfo.getReportName(); final String timeSpan = m_graphInfo.getTimespan(); final RequestCallback callback = new RequestCallback() { @Override public void onResponseReceived(final Request request, final Response response) { GWT.log("got response: " + response.getText() + " (" + response.getStatusCode() + ")"); } @Override public void onError(final Request request, final Throwable t) { GWT.log("got error: " + t.getLocalizedMessage()); } }; GWT.log("adding resource '" + resourceId + "' from graph report '" + graphName + "' to KSC report '" + kscReportName + "' (" + kscReportId + ") with title '" + graphTitle + "' and timespan '" + timeSpan + "'"); m_reportService.addGraphToReport(callback, kscReportId, graphTitle, graphName, resourceId, timeSpan); m_mainPopup.hide(); } @Override public void go(final HasWidgets container) { m_addImage.addClickHandler(new ClickHandler() { @Override public void onClick(final ClickEvent event) { GWT.log("clicked (showing = " + m_mainPopup.isShowing() + ", visible = " + m_mainPopup.isVisible() + ")"); if (m_mainPopup.isShowing()) { m_mainPopup.hide(); m_mainPopup.getElement().getStyle().setDisplay(Display.NONE); } else { m_mainPopup.getElement().getStyle().setDisplay(Display.BLOCK); m_mainPopup.showRelativeTo(m_addImage); } } }); m_mainPopup.setVisible(false); m_mainPopup.getElement().getStyle().setDisplay(Display.NONE); m_mainPopup.addAutoHidePartner(m_addImage.getElement()); Window.addResizeHandler(new ResizeHandler() { @Override public void onResize(final ResizeEvent event) { final int[] positions = calculateMainPopupPosition(); m_mainPopup.setPopupPosition(positions[0], positions[1]); } }); container.clear(); container.add(m_addImage); container.add(m_mainPopup.asWidget()); } public final native String getBaseHref() /*-{ try{ return $wnd.getBaseHref(); }catch(err){ return ""; } }-*/; private int[] calculateMainPopupPosition() { final int[] positions = { 0, 0 }; final int windowWidth = Window.getClientWidth(); final int imageRightEdge = m_addImage.getAbsoluteLeft() + m_addImage.getWidth(); if (imageRightEdge + 300 > windowWidth) { positions[0] = windowWidth - 320; } else { positions[0] = imageRightEdge - 3; } if (positions[0] < 0) positions[0] = 0; positions[1] = m_addImage.getAbsoluteTop() + m_addImage.getHeight() - 1; return positions; } }