annis.gui.widgets.gwt.client.ui.VJITWrapper.java Source code

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Here is the source code for annis.gui.widgets.gwt.client.ui.VJITWrapper.java

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/*
 * Copyright 2012 Corpuslinguistic working group Humboldt University Berlin.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package annis.gui.widgets.gwt.client.ui;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.DivElement;
import com.google.gwt.dom.client.Document;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.user.client.ui.Widget;
import com.vaadin.client.ApplicationConnection;
import com.vaadin.client.Paintable;
import com.vaadin.client.UIDL;
import com.vaadin.client.ValueMap;

/**
 *
 * @author Benjamin Weienfels <b.pixeldrama@gmail.com>
 */
public class VJITWrapper extends Widget implements Paintable {

    private Document doc = Document.get();

    private final String elementID;

    // javascript overlay object for the visualization
    private JITVisualization visualization;

    // the json data for the visualization
    private JSONObject jsonData;

    private JITConf config;

    // some css properties
    protected static final String background = "#ECF0F6";

    protected static final String width = "900px";

    protected static final String height = "600px";

    public VJITWrapper() {
        super();

        // build the html id
        elementID = Document.get().createUniqueId();

        // init container
        DivElement wrapper = doc.createDivElement();
        DivElement container = wrapper.appendChild(doc.createDivElement());
        setElement(wrapper);

        container.setAttribute("id", "container_" + elementID);
        wrapper.setAttribute("id", elementID);
    }

    @Override
    public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {

        // This call should be made first.
        // It handles sizes, captions, tooltips, etc. automatically.
        if (client.updateComponent(this, uidl, true)) {
            // If client.updateComponent returns true there has been no changes and we
            // do not need to update anything.
            return;
        }

        if (uidl.hasAttribute("visData")) {

            jsonData = parseStringToJSON(uidl.getStringAttribute("visData"));

            // setup config for visualization
            if (uidl.hasAttribute("mappings")) {
                setupConfig(uidl.getMapAttribute("mappings"));
            } else {
                setupConfig();
            }

            if (visualization == null) {
                visualization = visualizationInit(config.getJavaScriptObject());
            }

            if (jsonData != null) {
                visualization.render();
            } else {
                GWT.log("jsonData are null");
            }
        }
    }

    public native JITVisualization visualizationInit(JavaScriptObject config)/*-{
                                                                             return $wnd.$viz(config);
                                                                             }-*/;

    public JSONObject parseStringToJSON(String jsonString) {
        JSONObject json = null;

        try {
            json = JSONParser.parseStrict(jsonString).isObject();
        } catch (Exception ex) {
            GWT.log("this json " + jsonString + " is not parsed", ex);
        }

        return json;
    }

    private void setupConfig(ValueMap mappings) {
        if (config == null) {
            config = new JITConf();
        }

        for (String key : mappings.getKeySet()) {
            config.setProperty(key, mappings.getString(key));
        }

        setupConfig();
    }

    private void setupConfig() {
        if (config == null) {
            config = new JITConf();
        }

        config.setProperty("json", jsonData);
        config.setProperty("wrapper", elementID);
        config.setProperty("container", "container_" + elementID);
    }
}