SpinnerCellEditor.java

package com.arm.cmsis.pack.ui.tree;

import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;

/**
 * A cell editor that presents a spinner. The cell editor's
 * value is the selection of the spinner. The bounds of the spinner
 * are set by first getting the spinner and then applying its setter.
 */
public class SpinnerCellEditor extends CellEditor {
	private NumberSpinner spinner;
	private Text text;

	public SpinnerCellEditor(Composite parent) {
		super(parent);
	}

	@Override
	protected Control createControl(Composite parent) {
		spinner = new NumberSpinner(parent, SWT.NONE);
		text = spinner.getText();
		text.addSelectionListener(new SelectionAdapter() {
            @Override
			public void widgetDefaultSelected(SelectionEvent e) {
                handleDefaultSelection(e);
            }
        });
		return spinner;
	}

	@Override
	protected Object doGetValue() {
		if (spinner != null) {
			return spinner.getContent();
		}
		return null;
	}

	@Override
	protected void doSetFocus() {
		spinner.setFocus();
	}

	@Override
	protected void doSetValue(Object value) {
		if (value != null && spinner != null) {
			if (value instanceof Long) {
				spinner.setSelection((long) value);
			}
		}
	}

	@Override
	public void performCut() {
        text.cut();
    }

	@Override
	public void performCopy() {
        text.copy();
    }

	@Override
	public void performPaste() {
        text.paste();
	}

	protected void handleDefaultSelection(SelectionEvent event) {
        // same with enter-key handling code in keyReleaseOccured(e);
        fireApplyEditorValue();
        deactivate();
    }

	/**
	 *
	 * @return the embedded spinner control
	 */
	public NumberSpinner getSpinner() {
		return spinner;
	}

}