Java Tutorial/SWT/Group

Add image to Group

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Shell; public class GroupImageAdding {

 public static void main(String[] args) {
   final Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new FillLayout());
   Group group = new Group(shell, SWT.NONE);
   group.setLayout(new FillLayout());
   group.setText("a square");
   Canvas canvas = new Canvas(group, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       e.gc.drawImage(new Image(display, "yourFile.gif"), 0, 0);
     }
   });
   shell.pack();
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   
   display.dispose();
 }

}</source>

Add Radio Buttons to a Group

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Shell; public class GroupWithRadioButtons {

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new FillLayout());

   // Create the first Group
   Group group1 = new Group(shell, SWT.SHADOW_IN);
   group1.setText("Who"s your favorite?");
   group1.setLayout(new RowLayout(SWT.VERTICAL));
   new Button(group1, SWT.RADIO).setText("A");
   new Button(group1, SWT.RADIO).setText("B");
   new Button(group1, SWT.RADIO).setText("C");
   new Button(group1, SWT.RADIO).setText("D");
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
   display.dispose();
 }

}</source>

Create a Group without grouping Radio Buttons (SWT.NO_RADIO_GROUP)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Shell; public class GroupWithoutGroupingRadioButtons {

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new FillLayout());

   // Create the second Group
   Group group2 = new Group(shell, SWT.NO_RADIO_GROUP);
   group2.setText("Who"s your favorite?");
   group2.setLayout(new RowLayout(SWT.VERTICAL));
   new Button(group2, SWT.RADIO).setText("A");
   new Button(group2, SWT.RADIO).setText("B");
   new Button(group2, SWT.RADIO).setText("C");
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
   display.dispose();
 }

}</source>

Create Shadow in Group

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Shell; public class GroupShadowCreate {

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new FillLayout());

   // Create the first Group
   Group group1 = new Group(shell, SWT.SHADOW_IN);
   group1.setText("Who"s your favorite?");
   group1.setLayout(new RowLayout(SWT.VERTICAL));
   new Button(group1, SWT.RADIO).setText("A");
   new Button(group1, SWT.RADIO).setText("B");
   new Button(group1, SWT.RADIO).setText("C");
   new Button(group1, SWT.RADIO).setText("D");
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
   display.dispose();
 }

}</source>

Introducing Group

1. Provide visual organization and structure.
2. A Group can display some text along its top, specified by the setText() method.
3. A Group derives from Composite, and it can contain other widgets.

Group Styles:

StyleDescriptionSWT.SHADOW_ETCHED_INCreates a Group with the "etched in" shadow style.SWT.SHADOW_ETCHED_OUTCreates a Group with the "etched out" shadow style.SWT.SHADOW_INCreates a Group with the "in" shadow style, which isn"t necessarily popular.SWT.SHADOW_OUTCreates a Group with the "out" shadow style.SWT.SHADOW_NONECreates a Group with no shadow style.SWT.NO_RADIO_GROUPCreate a Group without grouping radio button