org.unitime.timetable.gwt.client.TimeHint.java Source code

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Here is the source code for org.unitime.timetable.gwt.client.TimeHint.java

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/*
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 *
 * The Apereo Foundation licenses this file to you 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 org.unitime.timetable.gwt.client;

import org.unitime.timetable.gwt.client.page.UniTimeNotifications;
import org.unitime.timetable.gwt.command.client.GwtRpcRequest;
import org.unitime.timetable.gwt.command.client.GwtRpcResponse;
import org.unitime.timetable.gwt.command.client.GwtRpcService;
import org.unitime.timetable.gwt.command.client.GwtRpcServiceAsync;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.Element;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * @author Tomas Muller
 */
public class TimeHint {
    private static String sLastParameter = null;
    private static GwtRpcServiceAsync RPC = GWT.create(GwtRpcService.class);
    private static boolean sShowHint = false;

    public static Widget content(TimeHintResponse response) {
        SimplePanel panel = null;
        try {
            if (response.getContent().startsWith("$")) {
                HTML content = new HTML(ToolBox.eval(response.getContent()), false);
                panel = new SimplePanel(content);
            } else {
                panel = new SimplePanel();
                panel.getElement().setInnerHTML(response.getContent());
            }
        } catch (Exception e) {
            UniTimeNotifications.error("Failed to display: " + response.getContent(), e);
        }
        panel.setStyleName("unitime-TimeHint");
        return panel;
    }

    /** Never use from GWT code */
    public static void _showTimeHint(JavaScriptObject source, String parameter) {
        showHint((Element) source.cast(), parameter);
    }

    public static void showHint(final Element relativeObject, final String parameter) {
        sLastParameter = parameter;
        sShowHint = true;
        RPC.execute(new TimeHintRequest(parameter), new AsyncCallback<TimeHintResponse>() {
            @Override
            public void onFailure(Throwable caught) {
            }

            @Override
            public void onSuccess(TimeHintResponse result) {
                if (result != null && sLastParameter.equals(parameter) && sShowHint)
                    GwtHint.showHint(relativeObject, content(result));
            }
        });
    }

    public static void hideHint() {
        sShowHint = false;
        GwtHint.hideHint();
    }

    public static native void createTriggers()/*-{
                                              $wnd.showGwtTimeHint = function(source, content) {
                                              @org.unitime.timetable.gwt.client.TimeHint::_showTimeHint(Lcom/google/gwt/core/client/JavaScriptObject;Ljava/lang/String;)(source, content);
                                              };
                                              $wnd.hideGwtTimeHint = function() {
                                              @org.unitime.timetable.gwt.client.TimeHint::hideHint()();
                                              };
                                              }-*/;

    public static class TimeHintRequest implements GwtRpcRequest<TimeHintResponse> {
        private String iParameter;

        public TimeHintRequest() {
        }

        public TimeHintRequest(String parameter) {
            iParameter = parameter;
        }

        public String getParameter() {
            return iParameter;
        }

        public void setParameter(String parameter) {
            iParameter = parameter;
        }

        @Override
        public String toString() {
            return getParameter();
        }
    }

    public static class TimeHintResponse implements GwtRpcResponse {
        private String iContent = null;

        public TimeHintResponse() {
        }

        public TimeHintResponse(String content) {
            iContent = content;
        }

        public String getContent() {
            return iContent;
        }

        public void setContent(String content) {
            iContent = content;
        }

        @Override
        public String toString() {
            return getContent();
        }
    }
}