com.pronoiahealth.olhie.client.features.dialogs.ErrorDisplayDialog.java Source code

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Here is the source code for com.pronoiahealth.olhie.client.features.dialogs.ErrorDisplayDialog.java

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/*******************************************************************************
 * Copyright (c) 2013 Pronoia Health LLC.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Pronoia Health LLC - initial API and implementation
 *******************************************************************************/
package com.pronoiahealth.olhie.client.features.dialogs;

import javax.annotation.PostConstruct;
import javax.enterprise.context.Dependent;
import javax.enterprise.event.Observes;
import javax.inject.Inject;

import org.jboss.errai.bus.client.api.messaging.Message;
import org.jboss.errai.bus.client.api.messaging.MessageBus;
import org.jboss.errai.bus.client.api.messaging.MessageCallback;

import com.github.gwtbootstrap.client.ui.Button;
import com.github.gwtbootstrap.client.ui.Modal;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
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.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.Widget;
import com.pronoiahealth.olhie.client.shared.events.errors.ClientErrorEvent;
import com.pronoiahealth.olhie.client.shared.events.errors.ServiceErrorEvent;
import com.pronoiahealth.olhie.client.shared.events.local.CommunicationErrorEvent;

/**
 * ErrorDisplayDialog.java<br/>
 * Responsibilities:<br/>
 * 1. Displays errors in response to the ServiceErrorEvent<br/>
 * 
 * @author John DeStefano
 * @version 1.0
 * @since May 26, 2013
 * 
 */
@Dependent
public class ErrorDisplayDialog extends Composite {

    @Inject
    UiBinder<Widget, ErrorDisplayDialog> binder;

    @UiField
    public Modal errorDisplayModal;

    @UiField
    public ScrollPanel errorMsgPanel;

    @UiField
    public HTML errorMsg;

    @UiField
    public Button closeButton;

    @Inject
    private MessageBus bus;

    private boolean reloadWindow;

    /**
     * Constructor
     * 
     */
    public ErrorDisplayDialog() {
    }

    /**
     * Create the gui via uiBinder. Initialize the DataBinder
     */
    @PostConstruct
    private void postConstruct() {
        initWidget(binder.createAndBindUi(this));
        errorDisplayModal.setStyleName("ph-Error-Modal", true);

        // Set up message listener for JAX-RS errors
        bus.subscribe("ClientErrorDialog", new MessageCallback() {
            @Override
            public void callback(Message message) {
                String msg = message.get(String.class, "Message");
                displayError(msg, false);
            }
        });
    }

    /**
     * Observes ServiceErrorEvent
     * 
     * @param serviceErrorEvent
     */
    protected void observesServiceErrorEvent(@Observes ServiceErrorEvent serviceErrorEvent) {
        displayError(serviceErrorEvent.getErrorMsg(), false);
    }

    /**
     * Observes ClientErrorEvent
     * 
     * @param clientErrorEvent
     */
    protected void observesClientErrorEvent(@Observes ClientErrorEvent clientErrorEvent) {
        displayError(clientErrorEvent.getMessage(), false);
    }

    /**
     * Observes CommunicationErrorEvent
     * 
     * @param communicationErrorEvent
     */
    protected void observesCommunicationErrorEvent(@Observes CommunicationErrorEvent communicationErrorEvent) {
        boolean reloadWindow = communicationErrorEvent.isReloadWindow();
        displayError(communicationErrorEvent.getMsg(), reloadWindow);
    }

    private void displayError(String msg, boolean reloadWindow) {
        this.reloadWindow = reloadWindow;
        SafeHtmlBuilder builder = new SafeHtmlBuilder();
        if (msg == null) {
            msg = "No error message was reported.";
        }
        errorMsg.setHTML(builder.appendEscaped(msg).toSafeHtml());
        errorDisplayModal.show();
    }

    /**
     * Close the error dialog.
     * 
     * @param event
     */
    @UiHandler("closeButton")
    public void closeButtonClicked(ClickEvent event) {
        errorDisplayModal.hide();

        // Should the window be reloaded as a result of this error
        if (reloadWindow == true) {
            Window.Location.reload();
        }
    }

}