PanelContentSender.java :  » Database-Client » SQL-Workbench » workbench » gui » sql » Java Open Source

/*
 * PanelContentSender.java
 *
 * This file is part of SQL Workbench/J, http://www.sql-workbench.net
 *
 * Copyright 2002-2008, Thomas Kellerer
 * No part of this code maybe reused without the permission of the author
 *
 * To contact the author please send an email to: support@sql-workbench.net
 *
 */
package workbench.gui.sql;

import java.awt.EventQueue;
import workbench.gui.MainWindow;
import workbench.interfaces.ResultReceiver;
import workbench.util.WbThread;

/**
 * This class sends a SQL statement to one of the 
 * panels in the MainWindow
 * 
 * @author support@sql-workbench.net
 */
public class PanelContentSender
{
  public static final int NEW_PANEL = -1;
  
  protected MainWindow target;
  
  public PanelContentSender(MainWindow window)
  {
    this.target = window;
  }
  
  public void showResult(final String sql, final String comment, final int panelIndex, final boolean logText)
  {
    if (sql == null) return;
    
    // When adding a new panel, a new connection 
    // might be initiated automatically. As that is done in a separate
    // thread, the call to showResult() might occur
    // before the connection is actually established.
    // So we need to wait until the new panel is connected
    // that's what waitForConnection() is for. 
    // As this code might be execute on the EDT we have to make sure
    // we are not blocking the current thread, so a new thread
    // is created that will wait for the connection to succeed.
    // then the actual showing of the data can be executed (on the EDT)
    WbThread t = new WbThread("ShowThread")
    {
      public void run()
      {
        final boolean isCurrent = (target.getCurrentPanelIndex() == panelIndex);
        final SqlPanel panel = selectPanel(panelIndex);
        target.waitForConnection();
        
        EventQueue.invokeLater(new Runnable()
        {
          public void run()
          {
            if (panel != null)
            {
              target.requestFocus();
              panel.selectEditor();
              ResultReceiver.ShowType type;
              if (panelIndex == NEW_PANEL)
              {
                type = ResultReceiver.ShowType.replaceText;
              }
              else if (panel.hasFileLoaded())
              {
                type = ResultReceiver.ShowType.logText;
              }
              else
              {
                type = (logText ? ResultReceiver.ShowType.logText : ResultReceiver.ShowType.appendText);
              }
              panel.showResult(sql, comment, type);
            }
          }
        });
      }
    };
    t.start();
  }
  
  public void sendContent(final String text, final int panelIndex, final boolean appendText)
  {
    if (text == null) return;
    
    final SqlPanel panel = selectPanel(panelIndex);
    if (panel == null) return;
    
    EventQueue.invokeLater(new Runnable()
    {
      public void run()
      {
        if (appendText)
        {
          panel.appendStatementText(text);
        }
        else
        {
          panel.setStatementText(text);
        }
        target.requestFocus();
        panel.selectEditor();
      }
    });
  }
  
  private SqlPanel selectPanel(int index)
  {
    SqlPanel panel;
    
    if (index == NEW_PANEL)
    {
      panel = (SqlPanel)this.target.addTab(true, true);
    }
    else
    {
      panel = (SqlPanel)this.target.getSqlPanel(index);
      target.selectTab(index);
    }
    return panel;
  }
}