com.mecatran.otp.gwt.client.view.AlertWidget.java Source code

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Here is the source code for com.mecatran.otp.gwt.client.view.AlertWidget.java

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/* -------------------------------------------------------------------------
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.Date;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FocusPanel;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.mecatran.otp.gwt.client.i18n.I18nUtils;
import com.mecatran.otp.gwt.client.model.AlertBean;

/**
 * A widget displaying a single alert, with an optional close button.
 * 
 */
public class AlertWidget extends Composite {

    // TODO Do we really need to print the date range for an itinerary alert?
    private final boolean DISPLAY_ALERT_DATE = false;

    public AlertWidget(AlertBean alert) {
        VerticalPanel rootPanel = new VerticalPanel();

        FocusPanel headerPanel = new FocusPanel();
        rootPanel.add(headerPanel);
        headerPanel.addStyleName("alert-header");
        HorizontalPanel titleAndButtonPanel = new HorizontalPanel();
        headerPanel.add(titleAndButtonPanel);
        Label icon = new Label("");
        icon.addStyleName(alert.getLevel() == AlertBean.LEVEL_INFO ? "info-icon" : "warn-icon");
        titleAndButtonPanel.add(icon);
        Label alertTitle = new Label(alert.getTitle());
        alertTitle.addStyleName("alert-title");
        titleAndButtonPanel.add(alertTitle);

        final SimplePanel collapsibleOuterPanel = new SimplePanel();
        rootPanel.add(collapsibleOuterPanel);
        collapsibleOuterPanel.addStyleName("alert-details-outer");
        VerticalPanel collapsibleInnerPanel = new VerticalPanel();
        collapsibleOuterPanel.add(collapsibleInnerPanel);
        collapsibleInnerPanel.addStyleName("alert-details-inner");
        if (DISPLAY_ALERT_DATE && alert.isPublishActiveRange()
                && (alert.getFrom() != null || alert.getTo() != null)) {
            Label dateRangeLabel = new Label(formatDateRange(alert.getFrom(), alert.getTo()));
            collapsibleInnerPanel.add(dateRangeLabel);
            dateRangeLabel.addStyleName("alert-datetime");
        }
        Label descriptionLabel = new Label(alert.getDescription());
        collapsibleInnerPanel.add(descriptionLabel);
        descriptionLabel.addStyleName("alert-description");
        if (alert.getUrl() != null && alert.getUrl().length() > 0) {
            final String url = alert.getUrl();
            Anchor moreInfoAnchor = new Anchor(I18nUtils.tr("more.info.alert"));
            moreInfoAnchor.addClickHandler(new ClickHandler() {
                @Override
                public void onClick(ClickEvent event) {
                    Window.open(url, "_blank", "");
                }
            });
            moreInfoAnchor.addStyleName("alert-url");
            collapsibleInnerPanel.add(moreInfoAnchor);
        }
        initWidget(rootPanel);
    }

    private String formatDateRange(Date from, Date to) {
        /*
         * TODO Make this more human-readable (if from and to are on the same
         * day, print only once the date; if from and to are today, do not print
         * the date; etc...)
         */
        // We assume the user will know the year... an alert is always nearby.
        DateTimeFormat dateTimeFormat = DateTimeFormat.getFormat("d MMM hh:mm");
        StringBuffer retval = new StringBuffer();
        if (from != null)
            retval.append(dateTimeFormat.format(from));
        else
            retval.append("...");
        if (from != null || to != null)
            retval.append("  ");
        if (to != null)
            retval.append(dateTimeFormat.format(to));
        else
            retval.append("...");
        return retval.toString();
    }
}