com.kk_electronic.kkportal.examples.modules.Inotify.java Source code

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Here is the source code for com.kk_electronic.kkportal.examples.modules.Inotify.java

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/*
 * Copyright 2010 kk-electronic a/s. 
 * 
 * This file is part of KKPortal.
 *
 * KKPortal is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KKPortal 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with KKPortal.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package com.kk_electronic.kkportal.examples.modules;

import java.util.ArrayList;
import java.util.List;

import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.DeferredCommand;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Widget;
import com.google.inject.Inject;
import com.kk_electronic.kkportal.core.event.INotificationEvent;
import com.kk_electronic.kkportal.core.event.INotificationHandler;
import com.kk_electronic.kkportal.core.moduleview.Module;
import com.kk_electronic.kkportal.core.services.Debug;

public class Inotify implements Module, INotificationHandler {
    private final Display display;

    public static interface UIBinder extends UiBinder<Widget, Display> {
    };

    public static class Display {
        Widget w;
        @UiField
        Element lineList;

        @Inject
        public Display(UIBinder binder) {
            w = binder.createAndBindUi(this);
        }

        public Widget asWidget() {
            return w;
        }

        public void setLines(List<String> lines) {
            StringBuilder sb = new StringBuilder();
            for (String line : lines) {
                if (sb.length() != 0) {
                    sb.append("<br />");
                }
                sb.append(line);
            }
            lineList.setInnerHTML(sb.toString());
            checkResize();
        }

        private void checkResize() {
            final int oldSize = lineList.getOffsetHeight();
            DeferredCommand.addCommand(new Command() {

                @Override
                public void execute() {
                    if (lineList.getOffsetHeight() != oldSize) {
                        GWT.log("resize");
                    }
                }
            });
        }
    }

    @Inject
    public Inotify(Display display, Debug debug, HandlerManager eventBus) {
        eventBus.addHandler(INotificationEvent.getType(), this);
        debug.inotify("server", new AsyncCallback<Object>() {

            @Override
            public void onFailure(Throwable caught) {
                GWT.log("INOTIFY-Could not listen", caught);
            }

            @Override
            public void onSuccess(Object result) {
                GWT.log("INOTIFY-Listening");
            }
        });
        this.display = display;
    }

    List<String> lines = new ArrayList<String>();

    public void addMessage(String s) {
        lines.add(s);
        while (lines.size() > 8) {
            lines.remove(0);
        }
        display.setLines(lines);
    }

    @Override
    public Widget asWidget() {
        return display.asWidget();
    }

    @Override
    public void onINotification(INotificationEvent event) {
        addMessage(event.getInotiytype() + ":" + event.getFilename());
    }
}