com.qut.gwtuilib.client.display.EventMessageLoggingPanel.java Source code

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Here is the source code for com.qut.gwtuilib.client.display.EventMessageLoggingPanel.java

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/* Copyright 2008, Queensland University of Technology
 * 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 com.qut.gwtuilib.client.display;

import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
import com.qut.gwtuilib.client.CSSConstants;
import com.qut.gwtuilib.client.eventdriven.eventmgr.BaseEvent;
import com.qut.gwtuilib.client.eventdriven.eventmgr.EventController;
import com.qut.gwtuilib.client.eventdriven.eventmgr.EventListener;
import com.qut.gwtuilib.client.eventdriven.events.EventConstants;
import com.qut.gwtuilib.client.eventdriven.events.MessageEvent;
import com.qut.gwtuilib.client.input.StyledButton;

public class EventMessageLoggingPanel extends HorizontalPanel implements EventListener {
    /* All events this editor instance will respond to */
    private String[] registeredEvents = { EventConstants.userMessage };

    private String areaID;

    ScrollPanel container;
    VerticalPanel loggingPanel;

    public EventMessageLoggingPanel(String areaID) {
        this.areaID = areaID;
        this.createInterface();

        EventController.registerListener(this);
    }

    private void createInterface() {
        StyledButton toggle = new StyledButton("application", "");

        toggle.addClickListener(new ClickListener() {

            public void onClick(Widget sender) {
                container.setVisible(!container.isVisible());
            }

        });

        this.loggingPanel = new VerticalPanel();

        this.container = new ScrollPanel(this.loggingPanel);
        this.container.setHeight("100px");
        this.container.setVisible(false);

        this.add(toggle);
        this.add(this.container);
        this.addStyleName(CSSConstants.eventMessageLoggingPanel);
    }

    public void executeEvent(BaseEvent event) {
        if (event instanceof MessageEvent) {
            MessageEvent messageEvent = (MessageEvent) event;
            LogStatement logStatement = new LogStatement(messageEvent.getMessage(), messageEvent.getType());

            if (loggingPanel.getWidgetCount() > 25) {
                loggingPanel.remove(25);
            }

            loggingPanel.insert(logStatement, 0);
        }
    }

    public String[] getRegisteredEvents() {
        return this.registeredEvents;
    }

    private class LogStatement extends HorizontalPanel {
        public LogStatement(String statement, int type) {
            this.setSpacing(5);

            Label log = new Label(statement);
            log.addStyleName(CSSConstants.logMessage);

            if (type == MessageEvent.error) {
                log.addStyleName(CSSConstants.errorText);
            }

            if (type == MessageEvent.information) {
                log.addStyleName(CSSConstants.infoText);
            }

            if (type == MessageEvent.ok) {
                log.addStyleName(CSSConstants.okText);
            }

            this.add(log);
        }
    }
}