connectserver.java

来自「此文件为OPC Client IsVJTrend源代码,在VJ++开发环境下调试」· Java 代码 · 共 238 行

/////////////////////////////////////////////////////////////////////////////
//
//  OPC Trend VJ Client: ConnectServer.java
//                       (Source File)
//
/////////////////////////////////////////////////////////////////////////////
//
//          Author: Raphael Imhof
//    Initial Date: 11/04/98
//       $Workfile: ConnectServer.java $
//       $Revision: 1 $
//           $Date: 7/27/99 5:09p $
//   Target System: Microsoft Windows NT 4.0
//     Environment: Visual J++ 6.0 / OPC DataAccess 2.0
//         Remarks:
//
/////////////////////////////////////////////////////////////////////////////
//
//     Description: implementation of the server list class.
//
//
/////////////////////////////////////////////////////////////////////////////
//
//  History of Changes     (Please remove very old comments and blank lines!)
//            $Log: /IDK/OPCServer/clients/VJ++/ISVjTrend/ConnectServer.java $
// 
// 1     7/27/99 5:09p Imhof
// 
// 1     7/27/99 4:39p Imhof
// 
// 1     7/27/99 4:33p Imhof
// 
// 2     1/23/99 9:50a Imhof
// If server list is empty no item is selected.
// 
// 1     1/21/99 10:12a Imhof
//
//
//  $Nokeywords:$ (To avoid useless search while checking in.)
/////////////////////////////////////////////////////////////////////////////
//  Copyright (C) 1999, Siemens Building Technologies, Inc. Landis Division
//
//  SIEMENS BUILDING TECHNOLOGIES, INC. IS PROVIDING THE FOLLOWING EXAMPLES
//  OF CODE AS SAMPLE ONLY.
//  SIEMENS BUILDING TECHNOLOGIES, INC. MAKES NO REPRESENTATIONS OR WARRANTIES
//  OF ANY KIND WITH RESPECT TO THE VALIDTY OF THE CODES OR DESIRED RESULTS
//  AND DISCLAIMS ALL SUCH REPRESENTATIONS AND WARRANTIES, INCLUDING FOR EXAMPLE,
//  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//  SIEMENS BUILIDNG TECHNOLOGIES, INC. DOES NOT REPRESENT OR WARRANT THAT
//  THE FOLLOWING CODE SAMPLES ARE ACCURATE, VALID, COMPLETE OR CURRENT.
//
/////////////////////////////////////////////////////////////////////////////

import com.ms.wfc.app.*;
import com.ms.wfc.core.*;
import com.ms.wfc.ui.*;
import com.ms.wfc.html.*;

import opcdaauto.*;
import com.ms.com.*;

/**
 * This class can take a variable number of parameters on the command
 * line. Program execution begins with the main() method. The class
 * constructor is not invoked unless an object of type 'ConnectServer'
 * created in the main() method.
 */
public class ConnectServer extends Form
{
	public OPCServer server;
	public String sOPCServer;
	public int count = 0;

	public ConnectServer()
	{
		super();

		// Required for Visual J++ Form Designer support
		initForm();		

		// TODO: Add any constructor code after initForm call
	}

	/**
	 * ConnectServer overrides dispose so it can clean up the
	 * component list.
	 */
	public void dispose()
	{
		super.dispose();
		components.dispose();
	}

	private void Find_click(Object source, Event e)
	{
		Find();	
	}
	
	private void Find()
	{
		ServerList.removeAll();
    
		Variant Servers = new Variant();
		Variant node = new Variant();
		node.putString(ServerComputer.getText());
		
		Servers = server.GetOPCServers(node);
 		
		SafeArray DA_Server = Servers.toSafeArray();
	
		for(int i = 0; i < DA_Server.getUBound(); i++)
		{
			ServerList.addItem(DA_Server.getString(i + Server.vbArrayOffset));
		}
		
		if (ServerList.getItemCount() > 0)
			ServerList.setSelected(0, true);
	}
	
	private void ServerList_selectedIndexChanged(Object source, Event e)
	{
		sOPCServer = (String)ServerList.getSelectedItem();
		ServerName.setText(sOPCServer);
	}
	
	private void OnActivate(Object source, Event e)
	{
		// TODO: How many time is this called during activation ?
		Find();
	}
	
	/**
	 * NOTE: The following code is required by the Visual J++ form
	 * designer.  It can be modified using the form editor.  Do not
	 * modify it using the code editor.
	 */
	Container components = new Container();
	Button Cancel = new Button();
	Button OK = new Button();
	Edit ServerName = new Edit();
	Label label1 = new Label();
	Label label2 = new Label();
	Edit ServerComputer = new Edit();
	Label label3 = new Label();
	ListBox ServerList = new ListBox();
	Button Find = new Button();

	private void initForm()
	{
		Cancel.setLocation(new Point(472, 48));
		Cancel.setSize(new Point(80, 24));
		Cancel.setTabIndex(0);
		Cancel.setText("Cancel");
		Cancel.setDialogResult(DialogResult.CANCEL);

		OK.setLocation(new Point(472, 16));
		OK.setSize(new Point(80, 24));
		OK.setTabIndex(1);
		OK.setText("OK");
		OK.setDialogResult(DialogResult.OK);

		this.setText("Connect to OPC Server");
		this.setAcceptButton(OK);
		this.setAutoScaleBaseSize(new Point(7, 16));
		this.setBorderStyle(FormBorderStyle.FIXED_DIALOG);
		this.setCancelButton(Cancel);
		this.setClientSize(new Point(567, 241));
		this.setMaximizeBox(false);
		this.setMinimizeBox(false);
		this.setShowInTaskbar(false);
		this.addOnActivate(new EventHandler(this.OnActivate));

		ServerName.setLocation(new Point(128, 16));
		ServerName.setSize(new Point(328, 23));
		ServerName.setTabIndex(3);
		ServerName.setText("");

		label1.setLocation(new Point(8, 16));
		label1.setSize(new Point(64, 16));
		label1.setTabIndex(4);
		label1.setTabStop(false);
		label1.setText("Server:");

		label2.setLocation(new Point(8, 56));
		label2.setSize(new Point(112, 16));
		label2.setTabIndex(5);
		label2.setTabStop(false);
		label2.setText("Server Computer:");

		ServerComputer.setLocation(new Point(128, 56));
		ServerComputer.setSize(new Point(328, 23));
		ServerComputer.setTabIndex(6);
		ServerComputer.setText("");

		label3.setLocation(new Point(8, 96));
		label3.setSize(new Point(80, 16));
		label3.setTabIndex(7);
		label3.setTabStop(false);
		label3.setText("Server List:");

		ServerList.setLocation(new Point(128, 96));
		ServerList.setSize(new Point(328, 132));
		ServerList.setTabIndex(8);
		ServerList.setText("listBox1");
		ServerList.setUseTabStops(true);
		ServerList.addOnSelectedIndexChanged(new EventHandler(this.ServerList_selectedIndexChanged));
		
		Find.setLocation(new Point(472, 96));
		Find.setSize(new Point(80, 24));
		Find.setTabIndex(2);
		Find.setText("&Find");
		Find.addOnClick(new EventHandler(this.Find_click));

		this.setNewControls(new Control[] {
							Find, 
							ServerList, 
							label3, 
							ServerComputer, 
							label2, 
							label1, 
							ServerName, 
							OK, 
							Cancel});
		
	}

	/**
	 * The main entry point for the application. 
	 *
	 * @param args Array of parameters passed to the application
	 * via the command line.
	 */
	public static void main(String args[])
	{
		Application.run(new ConnectServer());
	}
}