es.deusto.weblab.client.experiments.aquarium.ui.SingleWebcamPanel.java Source code

Introduction

Here is the source code for es.deusto.weblab.client.experiments.aquarium.ui.SingleWebcamPanel.java

Source

/*
* Copyright (C) 2012 onwards University of Deusto
* All rights reserved.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution.
*
* This software consists of contributions made by many individuals, 
* listed below:
*
* Author: Pablo Ordua <pablo.orduna@deusto.es>
*
*/

package es.deusto.weblab.client.experiments.aquarium.ui;

import com.google.gwt.core.client.GWT;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONValue;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Widget;

import es.deusto.weblab.client.configuration.IConfigurationRetriever;
import es.deusto.weblab.client.lab.experiments.IDisposableWidgetsContainer;
import es.deusto.weblab.client.ui.widgets.IWlDisposableWidget;
import es.deusto.weblab.client.ui.widgets.WlWebcam;

public class SingleWebcamPanel extends Composite implements IDisposableWidgetsContainer {

    private static SingleWebcamPanelUiBinder uiBinder = GWT.create(SingleWebcamPanelUiBinder.class);

    @UiField(provided = true)
    WlWebcam webcam;

    private IConfigurationRetriever configurationRetriever;

    interface SingleWebcamPanelUiBinder extends UiBinder<Widget, SingleWebcamPanel> {
    }

    public SingleWebcamPanel(IConfigurationRetriever configurationRetriever, String initialConfiguration,
            int camera) {

        this.configurationRetriever = configurationRetriever;

        this.webcam = GWT.create(WlWebcam.class);
        this.webcam.setTime(this.configurationRetriever);
        initWidget(uiBinder.createAndBindUi(this));

        parseWebcamConfig(initialConfiguration, camera);
    }

    public void start() {
        this.webcam.start();
    }

    private void parseWebcamConfig(String initialConfiguration, int camera) {
        System.out.println("Aquarium: initial config:" + initialConfiguration);
        final JSONValue initialConfigValue = JSONParser.parseStrict(initialConfiguration);
        final JSONObject initialConfigObject = initialConfigValue.isObject();
        if (initialConfigObject == null) {
            Window.alert("Error parsing aquarium configuration: not an object: " + initialConfiguration);
            return;
        }

        configureWebcam(this.webcam, initialConfigObject, camera);
    }

    private void configureWebcam(WlWebcam webcam, JSONObject initialConfigObject, int number) {
        final JSONValue webcamValue = initialConfigObject.get("webcam" + number);
        if (webcamValue != null) {
            final String urlWebcam = webcamValue.isString().stringValue();
            webcam.setUrl(urlWebcam);
        }

        final JSONValue mjpegValue = initialConfigObject.get("mjpeg" + number);
        if (mjpegValue != null) {
            final String mjpeg = mjpegValue.isString().stringValue();
            int width = 320;
            int height = 240;
            if (initialConfigObject.get("mjpegWidth" + number) != null) {
                final JSONValue mjpegWidth = initialConfigObject.get("mjpegWidth" + number);
                if (mjpegWidth.isNumber() != null) {
                    width = (int) mjpegWidth.isNumber().doubleValue();
                } else if (mjpegWidth.isString() != null) {
                    width = Integer.parseInt(mjpegWidth.isString().stringValue());
                }
            }
            if (initialConfigObject.get("mjpegHeight" + number) != null) {
                final JSONValue mjpegHeight = initialConfigObject.get("mjpegHeight" + number);
                if (mjpegHeight.isNumber() != null) {
                    height = (int) mjpegHeight.isNumber().doubleValue();
                } else if (mjpegHeight.isString() != null) {
                    height = Integer.parseInt(mjpegHeight.isString().stringValue());
                }
            }
            webcam.setStreamingUrl(mjpeg, width, height);
        }
    }

    @Override
    public IWlDisposableWidget[] getDisposableWidgets() {
        return new IWlDisposableWidget[] { this.webcam };
    }

    @Override
    public Widget asGwtWidget() {
        return this;
    }
}