Java Tutorial/SWT/Group

Add image to Group

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();
  }
}

Add Radio Buttons to a Group

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();
  }
}

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

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();
  }
}

Create Shadow in Group

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();
  }
}

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