Java tutorial
/* ------------------------------------------------------------------------- OpenTripPlanner GWT Client Copyright (C) 2015 Mecatran - info@mecatran.com This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. ------------------------------------------------------------------------- */ package com.mecatran.otp.gwt.client.view; import java.util.ArrayList; import java.util.List; import com.google.gwt.dom.client.BodyElement; import com.google.gwt.dom.client.Element; 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; import com.google.gwt.i18n.client.NumberFormat; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Widget; import com.mecatran.otp.gwt.client.i18n.I18nUtils; import com.mecatran.otp.gwt.client.model.ItineraryBean; import com.mecatran.otp.gwt.client.model.ItineraryLegBean; import com.mecatran.otp.gwt.client.model.ItineraryRoadLegBean; import com.mecatran.otp.gwt.client.model.ItineraryRoadStepBean; import com.mecatran.otp.gwt.client.model.ItineraryTransitLegBean; import com.mecatran.otp.gwt.client.model.TransitRouteBean; import com.mecatran.otp.gwt.client.model.Wgs84LatLonBean; import com.mecatran.otp.gwt.client.utils.FormatUtils; import com.mecatran.otp.gwt.client.utils.PolylineEncoder; /* * TODO Use html templating? */ public class PrintWidgetWindowImpl implements PrintWidget { private PrintWidgetListener printWidgetListener; private String printCss = ""; public PrintWidgetWindowImpl(String customCssUrl) { if (customCssUrl != null) downloadPrintCss(customCssUrl); } @Override public Widget getAsWidget() { return null; } @Override public void setPrintWidgetListener(PrintWidgetListener printWidgetListener) { this.printWidgetListener = printWidgetListener; } @Override public void printItinerary(ItineraryBean itinerary) { FlowPanel rootPanel = new FlowPanel(); /* Compute some values */ int nTransfers = 0; long walkDistanceMeter = 0; long bikeDistanceMeter = 0; for (ItineraryLegBean leg : itinerary.getLegs()) { switch (leg.getTravelType()) { case ROAD: switch (leg.getAsRoadLeg().getMode()) { case BICYCLE: case BICYCLE_RENTAL: bikeDistanceMeter += leg.getAsRoadLeg().getDistanceMeters(); break; case WALK: walkDistanceMeter += leg.getAsRoadLeg().getDistanceMeters(); break; default: // pass } break; case TRANSIT: nTransfers++; break; } } /* Display summary */ rootPanel.add(new HTML("<h1>" + I18nUtils.tr("print.itinerary.header", itinerary.getStartAddress(), itinerary.getEndAddress()) + "</h1>")); rootPanel.add(new HTML(I18nUtils.tr("print.summary.departure", FormatUtils.formatDateTime(itinerary.getDepartureTime()), itinerary.getStartAddress()))); rootPanel.add(new HTML(I18nUtils.tr("print.summary.arrival", FormatUtils.formatDateTime(itinerary.getArrivalTime()), itinerary.getEndAddress()))); rootPanel.add(new HTML( I18nUtils.tr("print.summary.duration", FormatUtils.formatDuration(itinerary.getDurationSeconds()), FormatUtils.formatDistance(itinerary.getDistanceMeters())))); StringBuffer infoHtml = new StringBuffer(); if (nTransfers > 0) { infoHtml.append(I18nUtils.tr("print.summary.transfers", nTransfers - 1)).append(", "); } if (walkDistanceMeter > 0) { infoHtml.append( I18nUtils.tr("print.summary.walk.distance", FormatUtils.formatDistance(walkDistanceMeter))) .append(", "); } if (bikeDistanceMeter > 0) { infoHtml.append( I18nUtils.tr("print.summary.bike.distance", FormatUtils.formatDistance(bikeDistanceMeter))) .append(", "); } // Remove last comma if (infoHtml.length() > 0) infoHtml.setLength(infoHtml.length() - 2); rootPanel.add(new HTML(infoHtml.toString())); rootPanel.add(new HTML("<h2>" + I18nUtils.tr("print.itinerary.details.header") + "</h2>")); /* Departure */ rootPanel.add(new HTML( "<h3>" + I18nUtils.tr("print.step.depart", FormatUtils.formatTime(itinerary.getDepartureTime()), FormatUtils.formatAddress(itinerary.getStartAddress())) + "</h3>")); /* Details */ for (ItineraryLegBean leg : itinerary.getLegs()) { switch (leg.getTravelType()) { case ROAD: rootPanel.add(getRoadDetails((ItineraryRoadLegBean) leg)); break; case TRANSIT: rootPanel.add(getTransitDetails((ItineraryTransitLegBean) leg)); break; default: throw new IllegalArgumentException("Unsupported leg type: " + leg.getTravelType()); } } /* Arrival */ rootPanel.add(new HTML( "<h3>" + I18nUtils.tr("print.step.arrival", FormatUtils.formatTime(itinerary.getArrivalTime()), FormatUtils.formatAddress(itinerary.getEndAddress())) + "</h3>")); openWindow(rootPanel.getElement()); } private void downloadPrintCss(String cssUrl) { RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, cssUrl); try { requestBuilder.sendRequest(null, new RequestCallback() { @Override public void onResponseReceived(Request request, Response response) { printCss = response.getText(); } @Override public void onError(Request request, Throwable exception) { } }); } catch (RequestException e) { } } private void openWindow(Element rootElement) { /* This is the hackish area ... */ BodyElement printBody = openWindow(I18nUtils.tr("print.button"), printCss); printBody.getOwnerDocument().getElementById("printarea").appendChild(rootElement); } /** * Implementation note: Including a CSS as script with href in the HTML * document below does not work. We need to include the CSS inline, * pre-downloaded. * * @param printLabel * @param cssContent * CSS CONTENT, not URL. * @return */ public static native BodyElement openWindow(String printLabel, String cssContent) /*-{ var win = window.open("", "win", "width=940,height=400,status=1,resizeable=1,scrollbars=1"); win.document.open("text/html", "replace"); win.document.write("<html><head><style>\n" + cssContent + "\n</style></head><body><div><button onclick='window.print()'>" + printLabel + "</button></div><div id='printarea'/></body></html>"); win.document.close(); win.focus(); return win.document.body; }-*/; private Widget getRoadDetails(ItineraryRoadLegBean leg) { FlowPanel line = new FlowPanel(); // Main instruction line.add( new HTML("<h3>" + leg.getInstructions() + " (" + FormatUtils.formatDistance(leg.getDistanceMeters()) + " - " + FormatUtils.formatDuration(leg.getDurationSeconds()) + ")</h3>")); // Steps StringBuilder stepsHtml = new StringBuilder(); stepsHtml.append("<ul>"); for (ItineraryRoadStepBean step : leg.getRoadSteps()) { if (step.getInstructions() == null) { // Can happen in case of transfers between two transit legs continue; } stepsHtml .append("<li>").append(step.getInstructions()).append( (step.getDistanceMeters() >= 5 ? " (" + FormatUtils.formatDistance(step.getDistanceMeters()) + " - " + FormatUtils.formatDuration(step.getDurationSeconds()) + ")" : "")) .append("</li>"); } // Map StringBuilder mapsHtml = new StringBuilder(); if (leg.getPath() != null && leg.getPath().length > 0) { for (String url : getMapUrl(leg.getPath())) { mapsHtml.append("<img style='width: 8cm' src='").append(url).append("'><br/><hr/>"); } } // Table StringBuilder tableHtml = new StringBuilder(); tableHtml.append("<table><tr><td>").append(mapsHtml.toString()).append("</td><td>") .append(stepsHtml.toString()).append("</td></tr></table>"); line.add(new HTML(tableHtml.toString())); return line; } private Widget getTransitDetails(ItineraryTransitLegBean leg) { FlowPanel line = new FlowPanel(); TransitRouteBean route = leg.getRoute(); String codeHtml = "<b><span class='route-code' style='color:" + route.getForegroundColor() + "; background-color:" + route.getBackgroundColor() + "'> " + route.getCode() + " </span></b>"; line.add(new HTML("<h3>" + I18nUtils.tr("print.take.the.route", codeHtml, FormatUtils.formatTime(leg.getDepartureTime()), leg.getDepartureStop().getName(), leg.getHeadsign()) + "</h3>")); line.add(new HTML("<h3>" + I18nUtils.tr("print.hop.off", "<span class='time'>" + FormatUtils.formatTime(leg.getArrivalTime()) + "</span>", leg.getArrivalStop().getName()) + "\"</h3>")); return line; } private List<String> getMapUrl(Wgs84LatLonBean[] path) { final int MAP_PATH_SIZE = 100; NumberFormat dec5Format = NumberFormat.getFormat("#.00000"); List<String> retval = new ArrayList<String>(); int n = (path.length - 1) / MAP_PATH_SIZE + 1; int m = path.length / n + 1; int js = 0; for (int i = 0; i < n; i++) { StringBuilder urlBuilder = new StringBuilder(); int je = js + m; if (je > path.length) je = path.length; boolean start = i == 0; boolean end = je == path.length; urlBuilder.append( "http://maps.googleapis.com/maps/api/staticmap?sensor=false&scale=2&size=800x800&maptype=roadmap"); if (start) urlBuilder.append("&markers=").append(dec5Format.format(path[0].getLat())).append(",") .append(dec5Format.format(path[0].getLon())); if (end && !start) urlBuilder.append("&markers="); else urlBuilder.append("|"); if (end) urlBuilder.append(dec5Format.format(path[path.length - 1].getLat())).append(",") .append(dec5Format.format(path[path.length - 1].getLon())); urlBuilder.append("&path=color:blue|enc:"); Wgs84LatLonBean[] subPath = new Wgs84LatLonBean[je - js]; // GWT does not have Arrays.copyOfRange() ... for (int k = js; k < je; k++) { subPath[k - js] = path[k]; } urlBuilder.append(PolylineEncoder.encode(subPath)); retval.add(urlBuilder.toString()); js = je; } assert (js == path.length); return retval; } }