Source Code : FormLayout: create a simple dialog using form layout

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FormLayout: create a simple dialog using form layout

/*
 * FormLayout example snippet: create a simple dialog using form layout
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;

public class Snippet65 {

  public static void main(String[] args) {
    Display display = new Display();
    final Shell shell = new Shell(display);
    Label label = new Label(shell, SWT.WRAP);
    label
        .setText("This is a long text string that will wrap when the dialog is resized.");
    List list = new List(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
    list.setItems(new String[] { "Item 1", "Item2" });
    Button button1 = new Button(shell, SWT.PUSH);
    button1.setText("Ok");
    Button button2 = new Button(shell, SWT.PUSH);
    button2.setText("Cancel");

    final int insetX = 4, insetY = 4;
    FormLayout formLayout = new FormLayout();
    formLayout.marginWidth = insetX;
    formLayout.marginHeight = insetY;
    shell.setLayout(formLayout);

    Point size = label.computeSize(SWT.DEFAULT, SWT.DEFAULT);
    final FormData labelData = new FormData(size.x, SWT.DEFAULT);
    labelData.left = new FormAttachment(0, 0);
    labelData.right = new FormAttachment(100, 0);
    label.setLayoutData(labelData);
    shell.addListener(SWT.Resize, new Listener() {
      public void handleEvent(Event e) {
        Rectangle rect = shell.getClientArea();
        labelData.width = rect.width - insetX * 2;
        shell.layout();
      }
    });

    FormData button2Data = new FormData();
    button2Data.right = new FormAttachment(100, -insetX);
    button2Data.bottom = new FormAttachment(100, 0);
    button2.setLayoutData(button2Data);

    FormData button1Data = new FormData();
    button1Data.right = new FormAttachment(button2, -insetX);
    button1Data.bottom = new FormAttachment(100, 0);
    button1.setLayoutData(button1Data);

    FormData listData = new FormData();
    listData.left = new FormAttachment(0, 0);
    listData.right = new FormAttachment(100, 0);
    listData.top = new FormAttachment(label, insetY);
    listData.bottom = new FormAttachment(button2, -insetY);
    list.setLayoutData(listData);

    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

           
       

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