<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<TITLE>Getting Started with SWT</TITLE>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" href="../../default_style.css">
</head>
<body>
&nbsp; 
<table BORDER=0 CELLSPACING=0 CELLPADDING=2 WIDTH="100%" >
  <tr> 
    <td ALIGN=left VALIGN=top COLSPAN="2" BGCOLOR="#0080c0"><b><font face="Arial,Helvetica"><font color="#ffffff">&nbsp;Eclipse 
      Corner Article</font></font></b></td>
  </tr>
</table>
<h1> <img SRC="../../images/Idea.jpg" height=86 width=120 align=center></h1>
<center>
  <h1> Getting Started with SWT</h1>
</center>
<center>
  <h3> Exploring the features of the Eclipse Standard Widget Toolkit</h3>
</center>
<blockquote><b>Summary</b> <br>
  This article contains several examples that show how to use the features of 
  the Eclipse Widget toolkit, SWT. Each example builds upon the ones before. The 
  first example shows how to create an empty window. The second example adds some 
  buttons to the window. The third example registers a listener for events on 
  one of the buttons.</blockquote>
<p> 
<hr WIDTH="100%">
<br>
<p>The examples below show how to use SWT to create stand-alone applications, 
  and provide a good basis for experimenting with SWT. The Eclipse Workbench defines 
  the UI paradigm and how editors and views are integrated. It provides the display 
  and shell that are created below so you don't need to create them for you Workbench 
  plug-in user interfaces.</p>
<p>For further details on SWT, take a look at the <a href="swt-widget-hierarchy.html">widget 
  hierarchy</a> and <a href="swt-style-bits.html">supported style bits</a>. Then 
  try modifying the example below with different widgets, styles, and actions.</p>
<h2> <a NAME="BM2_1_Example_1__Creating_your_first_win"></a>Creating your first 
  window</h2>
<pre>// Create a shell.&nbsp;
Display display = new Display(); // The "parent" of a shell is the display it is created on.

Shell shell =   
                 

     
                 

   new Shell (display); // Create the top level window.&nbsp;
shell.open (); // Open it

// This is the event loop.

while (!shell.isDisposed ())&nbsp;
&nbsp; if (!display.readAndDispatch ()) display.sleep ();</pre>
<h2> <a NAME="BM2_2_Example_2__Adding_a_widget"></a><b>Adding a widget</b></h2>
This example builds upon the first example and adds two buttons: A push button 
and a check box. Notice how the constructors in SWT require you to pass the parent 
widget and style bits. Style bits are used to specify values required to create 
the underlying OS resource. In this case it specifies the type of button to create. 
The code added by this example is marked in <i>italic.</i> 
<pre>Display display = new Display();

Shell shell = new Shell (display);

<i>Button b1 = new Button (shell, SWT.PUSH);&nbsp;
b1.setText ("Button 1");
b1.setBounds (0, 0, 100, 60);
Button b2 =      
  
    
        
  
    
   new Button (shell, SWT.CHECK);
b2.setText ("Button 2");&nbsp;
b2.setBounds (0, 60, 100, 45);

</i>shell.open ();&nbsp;
while (!shell.isDisposed ())&nbsp;
&nbsp; if (!display.readAndDispatch ()) display.sleep ();</pre>
<h2> <a NAME="BM2_3_Example_3__Adding_Event_Handlers"></a>Adding event handlers</h2>
Event handling is done by registering listeners in the same way as in AWT. The 
code added by this example is marked in <i>italic.</i> 
<pre>Shell shell = new Shell ();&nbsp;
Button b1 = new Button (shell, SWT.PUSH);&nbsp;
b1.setText ("Button 1");&nbsp;
b1.setBounds (0, 0, 100, 60);

<i>b1.addMouseListener(new MouseListener() {&nbsp;
&nbsp; public void mouseDown(MouseEvent e) {&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; System.out.println("mouseDown:");&nbsp;
&nbsp; };&nbsp;
&nbsp; public void mouseDoubleClick(MouseEvent e) {&nbsp;
&nbsp;&nbsp;&nbsp; System.out.println("mouseDoubleClick:");&nbsp;
&nbsp; };&nbsp;
&nbsp; public void mouseUp(MouseEvent e) {&nbsp;
&nbsp;&nbsp;&nbsp; System.out.println("mouseUp:");&nbsp;
&nbsp;};&nbsp;
});

</i>Button b2 = new Button (shell, SWT.CHECK);&nbsp;
b2.setText ("Button 2");&nbsp;
b2.setBounds (0, 60, 100, 45);&nbsp;
shell.open ();
&nbsp;&nbsp;<a NAME="BM2_4_LayoutManagers_in_SWT"></a>
Display display =
  
   shell.getDisplay ();&nbsp;
while (!shell.isDisposed ())&nbsp;
&nbsp; if (!display.readAndDispatch ()) display.sleep ();</pre>
<br>
&nbsp; 
</body>
</html>