Examples of org.eclipse.swt.layout.FormLayout

org.eclipse.swt.layout.FormLayout
Instances of this class control the position and size of the children of a composite control by using FormAttachments to optionally configure the left, top, right and bottom edges of each child.
The following example code creates a FormLayout and then sets it into a Shell:
```
 Display display = new Display (); Shell shell = new Shell(display); FormLayout layout = new FormLayout(); layout.marginWidth = 3; layout.marginHeight = 3; shell.setLayout(layout); 
```
To use a FormLayout, create a FormData with FormAttachment for each child of Composite. The following example code attaches button1 to the top and left edge of the composite and button2 to the right edge of button1 and the top and right edges of the composite:
```
 FormData data1 = new FormData(); data1.left = new FormAttachment(0, 0); data1.top = new FormAttachment(0, 0); button1.setLayoutData(data1); FormData data2 = new FormData(); data2.left = new FormAttachment(button1); data2.top = new FormAttachment(0, 0); data2.right = new FormAttachment(100, 0); button2.setLayoutData(data2); 
```
Each side of a child control can be attached to a position in the parent composite, or to other controls within the Composite by creating instances of FormAttachment and setting them into the top, bottom, left, and right fields of the child's FormData.

If a side is not given an attachment, it is defined as not being attached to anything, causing the child to remain at its preferred size. If a child is given no attachment on either the left or the right or top or bottom, it is automatically attached to the left and top of the composite respectively. The following code positions button1 and button2 but relies on default attachments:
```
 FormData data2 = new FormData(); data2.left = new FormAttachment(button1); data2.right = new FormAttachment(100, 0); button2.setLayoutData(data2); 
```
IMPORTANT: Do not define circular attachments. For example, do not attach the right edge of button1 to the left edge of button2 and then attach the left edge of button2 to the right edge of button1. This will over constrain the layout, causing undefined behavior. The algorithm will terminate, but the results are undefined.
@see FormData @see FormAttachment @since 2.0

     */
    public FilterCombo(Composite parent, String element) {
        
        super(parent, SWT.NONE);
        
        setLayout( new FormLayout() );
        
        theCombo = new Combo(this, SWT.DROP_DOWN | SWT.READ_ONLY);
        filters = new ArrayList();


        super.setBackground(theCombo.getBackground());

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                      List localizedUnits,
                      boolean isEmptyItemRequired) {


        super(parent, SWT.NONE);
        this.isEmptyItemRequired = isEmptyItemRequired;
        setLayout(new FormLayout());


        theCombo = new Combo(this, SWT.DROP_DOWN | SWT.READ_ONLY);


        // Populate the combo from the properties file
        populateWithUnits(localizedUnits);

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     */
    public Preview(Composite parent, int style) {
        super(parent, style);
        group = new Group(parent, SWT.NONE);
        group.setText(PREVIEW_TITLE);
        group.setLayout(new FormLayout());
        formData.left = new FormAttachment(0, MARGIN_LEFT);
        formData.right = new FormAttachment(100, -MARGIN_RIGHT);
        formData.top = new FormAttachment(0, MARGIN_TOP);
        formData.bottom = new FormAttachment(100, -MARGIN_BOTTOM);
        getChild().setLayoutData(formData);

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    if (secondaryId == null) {
      setMultiView(this);
      return;
    }
    FormData layoutData = null;
    FormLayout layout = new FormLayout();
    parent.setLayout(layout);


    SashForm sashHor = new SashForm(parent, SWT.HORIZONTAL);
    sashHor.setLayout(new FormLayout());
    
    // Left
    Composite compositeLeft = new Composite(sashHor, SWT.NONE);
    compositeLeft.setLayout(new FormLayout());
    // Right
    Composite compositeRight = new Composite(sashHor, SWT.NONE);
    compositeRight.setLayout(new FormLayout());


    layoutData = new FormData();
    layoutData.top = new FormAttachment(0, pad_frame);
    layoutData.left = new FormAttachment(0, pad_frame);
    layoutData.right = new FormAttachment(100, -pad_frame);

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      setMultiView(this);
      return;
    }


    FormData layoutData = null;
    FormLayout layout = new FormLayout();
    parent.setLayout(layout);
    
    final StyledText txtSource = new StyledText(parent, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL | SWT.WRAP);
    final Text txtResult = new Text(parent, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL | SWT.WRAP);
    final Label lblPattern = new Label(parent, SWT.NONE);

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      setMultiView(this);
      return;
    }


    FormData layoutData = null;
    FormLayout layout = new FormLayout();
    parent.setLayout(layout);
    
    Label lblCharset = new Label(parent, SWT.NONE);
    final Combo cboCharset = new Combo(parent, SWT.BORDER);
    final Button chkChunked = new Button(parent, SWT.CHECK);

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      setMultiView(this);
      return;
    }
    
    FormData layoutData = null;
    FormLayout layout = new FormLayout();
    parent.setLayout(layout);
    
    Label lblCharset = new Label(parent, SWT.NONE);
    Label lblDigest = new Label(parent, SWT.NONE);
    final Combo cboCharset = new Combo(parent, SWT.BORDER);

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      setMultiView(this);
      return;
    }
    
    FormData layoutData = null;
    FormLayout layout = new FormLayout();
    parent.setLayout(layout);


    SashForm sashHor = new SashForm(parent, SWT.HORIZONTAL);
    sashHor.setLayout(new FormLayout());
    
    // Left
    Composite compositeLeft = new Composite(sashHor, SWT.NONE);
    compositeLeft.setLayout(new FormLayout());
    // Right
    Composite compositeRight = new Composite(sashHor, SWT.NONE);
    compositeRight.setLayout(new FormLayout());


    layoutData = new FormData();
    layoutData.top = new FormAttachment(0, pad_frame);
    layoutData.left = new FormAttachment(0, pad_frame);
    layoutData.right = new FormAttachment(100, -pad_frame);

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      setMultiView(this);
      return;
    }
    
    FormData layoutData = null;
    FormLayout layout = new FormLayout();
    parent.setLayout(layout);
    
    Label lblCharset = new Label(parent, SWT.NONE);
    final Combo cboCharset = new Combo(parent, SWT.BORDER);
    final Text txtDEC = new Text(parent, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL | SWT.WRAP);

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  }


  @Override
  public void createPartControl(Composite parent) {
    FormData layoutData = null;
    FormLayout layout = new FormLayout();
    parent.setLayout(layout);
    Button btnTest = new Button(parent, SWT.PUSH);
    layoutData = new FormData();
    layoutData.top = new FormAttachment(0, pad_ctrl);
    layoutData.left = new FormAttachment(0, pad_ctrl);

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