Package org.jboss.errai.tools.source.client

Source Code of org.jboss.errai.tools.source.client.SourceViewWidget

/*
* Copyright 2009 JBoss, a divison Red Hat, Inc
*
* 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 org.jboss.errai.tools.source.client;

import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.TextBox;
import org.gwt.mosaic.ui.client.layout.BoxLayout;
import org.gwt.mosaic.ui.client.layout.BoxLayoutData;
import org.gwt.mosaic.ui.client.layout.LayoutPanel;
import org.jboss.errai.bus.client.ErraiBus;
import org.jboss.errai.bus.client.api.Message;
import org.jboss.errai.bus.client.api.MessageCallback;
import org.jboss.errai.bus.client.api.base.MessageBuilder;
import org.jboss.errai.bus.client.framework.MessageBus;
import org.jboss.errai.bus.client.protocols.MessageParts;

class SourceViewWidget extends LayoutPanel
{
  private SourcePanel formatted;
  private MessageBus bus = ErraiBus.get();

  public SourceViewWidget(boolean hasInput)
  {
    super(new BoxLayout(BoxLayout.Orientation.VERTICAL));

    if(hasInput)
    {
      final TextBox sourceName = new TextBox();

      this.add(sourceName);
      this.add(new Button("View Source", new ClickHandler()
      {
        public void onClick(ClickEvent clickEvent)
        {
          String text = sourceName.getText();
          requestSource(text);
        }
      }));

    }

    createSourcePanel(this);
    setupListener();
  }

  public SourceViewWidget(String[] sourceNames)
  {
    super(new BoxLayout(BoxLayout.Orientation.VERTICAL));

    LayoutPanel toolbar = new LayoutPanel(new BoxLayout(BoxLayout.Orientation.HORIZONTAL));
    final ListBox listBox = new ListBox();
    for(String s : sourceNames)
      listBox.addItem(s);
    toolbar.add(listBox, new BoxLayoutData(BoxLayoutData.FillStyle.HORIZONTAL));
    toolbar.add(new Button("View", new ClickHandler()
    {
      public void onClick(ClickEvent clickEvent)
      {
        requestSource(listBox.getItemText(listBox.getSelectedIndex()));
      }
    }));

    this.add(toolbar);

    listBox.addChangeHandler(new ChangeHandler()
    {
      public void onChange(ChangeEvent changeEvent)
      {
        requestSource(listBox.getItemText(listBox.getSelectedIndex()));
      }
    });

    createSourcePanel(this);
    setupListener();
  }

  public void requestSource(String className)
  {
    MessageBuilder.createMessage()
        .toSubject("SourceViewService")
        .signalling()
        .with(MessageParts.ReplyTo, "SourceViewClient")
        .with("className", className)
        .noErrorHandling()
        .sendNowWith(bus);
  }

  private void setupListener()
  {
    bus.subscribe("SourceViewClient", new MessageCallback()
    {
      public void callback(Message message)
      {
        String source = message.get(String.class, "source");
        formatted.setSource(source);
      }
    });
  }

  private void createSourcePanel(LayoutPanel panel)
  {
    formatted = new SourcePanel();
    panel.add(formatted, new BoxLayoutData(BoxLayoutData.FillStyle.BOTH));
  }
}
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