Snippet69.java Source code

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Here is the source code for Snippet69.java

Source

/*
 * FormLayout example snippet: center a label and single line text using a 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.FontMetrics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class Snippet69 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        Label label = new Label(shell, SWT.NONE | SWT.BORDER);
        label.setText("Name");
        Text text = new Text(shell, SWT.NONE);

        FormLayout layout = new FormLayout();
        layout.marginWidth = layout.marginHeight = 5;
        shell.setLayout(layout);

        GC gc = new GC(text);
        FontMetrics fm = gc.getFontMetrics();
        int charWidth = fm.getAverageCharWidth();
        int width = text.computeSize(charWidth * 8, SWT.DEFAULT).x;
        gc.dispose();
        FormData data = new FormData(width, SWT.DEFAULT);
        text.setLayoutData(data);
        data.left = new FormAttachment(label, 5);
        data.top = new FormAttachment(label, 0, SWT.CENTER);

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