How can i remove default space occupied by label from group?

Question

I want to create a label in one composite and group which contains 2 radio buttons. But I am facing problem while aligning it. It is not properly aligned wrt to label. The group has a text or header which I am not using. Due to that text it is not properly aligned. But for composite I am getting the proper behavior and it is aligned properly wrt to label. So is there any way to replicate the same thing using group. Below contains the snapshot and code which I used.

Code:

shell.setLayout(new GridLayout(2,false));
GridData grid=new GridData();
Composite comp=new Composite(shell, SWT.None);

comp.setLayout(new GridLayout());
comp.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false));
Label label = new Label(comp, SWT.None);
label.setText("Invertframe:");

org.eclipse.swt.widgets.Group group=new org.eclipse.swt.widgets.Group(shell, SWT.None);
GridLayout layout = new GridLayout(2, true);

layout.horizontalSpacing = 0;
layout.verticalSpacing = 10;
layout.marginBottom = 0;
layout.marginHeight = 0;
layout.marginWidth = 0;

group.setLayout(layout);

group.setLayoutData(grid);
Button button =new  Button(group, SWT.RADIO);
button.setText("ON");
Button button2 =new  Button(group, SWT.RADIO);
button2.setText("OFF");
comp=new Composite(shell, SWT.None);

comp.setLayout(new GridLayout());
comp.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false));
label = new Label(comp, SWT.None);
label.setText("Invertframe:");

Composite composite2=new Composite(shell, SWT.BORDER);
layout = new GridLayout(2, true);
composite2.setLayout(layout);
layout.horizontalSpacing = 0;
layout.verticalSpacing = 10;
layout.marginBottom = 0;
layout.marginHeight = 0;
layout.marginWidth = 0;

button =new  Button(composite2, SWT.RADIO);
button.setText("ON");
button2 =new  Button(composite2, SWT.RADIO);
button2.setText("OFF");

Answer 1

You might not have tried negative verticalIndent

protected void createContents()
{
    shell.setLayout(new GridLayout(2, false));
    GridData grid = new GridData();
    grid.verticalAlignment = SWT.FILL;
    grid.verticalIndent = -6;
    Composite comp = new Composite(shell, SWT.None);

    comp.setLayout(new GridLayout());
    comp.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false));
    Label label = new Label(comp, SWT.None);
    label.setText("Invertframe:");

    org.eclipse.swt.widgets.Group group = new org.eclipse.swt.widgets.Group(shell, SWT.None);
    GridLayout layout = new GridLayout(2, true);

    layout.horizontalSpacing = 0;
    layout.verticalSpacing = 0;
    layout.marginBottom = 0;
    layout.marginHeight = 0;
    layout.marginWidth = 0;

    group.setLayout(layout);

    group.setLayoutData(grid);
    Button button = new Button(group, SWT.RADIO);
    GridData gd_button = new GridData(SWT.LEFT, SWT.FILL, false, false, 1, 1);
    gd_button.verticalIndent = -2;
    button.setLayoutData(gd_button);

    button.setText("ON");
    Button button2 = new Button(group, SWT.RADIO);
    GridData gd_button2 = new GridData(SWT.LEFT, SWT.FILL, false, false, 1, 1);
    gd_button2.verticalIndent = -2;
    button2.setLayoutData(gd_button2);
    button2.setText("OFF");


    comp = new Composite(shell, SWT.None);

    comp.setLayout(new GridLayout());
    comp.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false));
    label = new Label(comp, SWT.None);
    label.setText("Invertframe:");

    Composite composite2 = new Composite(shell, SWT.BORDER);
    layout = new GridLayout(2, true);
    composite2.setLayout(layout);
    layout.horizontalSpacing = 0;
    layout.verticalSpacing = 10;
    layout.marginBottom = 0;
    layout.marginHeight = 0;
    layout.marginWidth = 0;

    button = new Button(composite2, SWT.RADIO);
    button.setText("ON");
    button2 = new Button(composite2, SWT.RADIO);
    button2.setText("OFF");
}

Answer 2

Well, you were right. That behaviour is caused by the Group 's empty title string.
I don't think you can get your desired behaviour, but you may want to try applying the following GridLayout to your group:

final GridLayout grid = (GridLayout) layout;
grid.horizontalSpacing = grid.marginBottom = grid.marginHeight = grid.marginLeft = grid.marginRight = grid.marginTop = grid.marginWidth = grid.verticalSpacing = 0;