package nl.hm.ilja.ui.databinding;

import java.util.Date;

import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.jface.databinding.swt.WidgetValueProperty;
import org.eclipse.nebula.widgets.datechooser.DateChooserCombo;
import org.eclipse.swt.SWT;

/**
 * Helper class which represents the <code>date</code> property of the
 * {@link DateChooserCombo} widget. It can be used for data binding. You can
 * obtain the {@link IObservableValue} of the <code>date</code> property with
 * this code:
 * 
 * <pre>
 * IObservableValue dateObservable = new DateChooserComboDateProperty()
 * 		.observe(dateChooserWidget);
 * </pre>
 * 
 * See also <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=246014">this
 * Eclipse feature request</a>.
 * 
 * @author Henno Vermeulen
 */
public class DateChooserComboDateProperty extends WidgetValueProperty {

	public DateChooserComboDateProperty() {
		super(SWT.Modify);
	}

	@Override
	protected Object doGetValue(Object source) {
		return ((DateChooserCombo) source).getValue();
	}

	@Override
	protected void doSetValue(Object source, Object value) {
		((DateChooserCombo) source).setValue((Date) value);
	}

	@Override
	public Object getValueType() {
		return Date.class;
	}

}

package nl.hm.ilja.ui.databinding;

import java.util.Date;

/**
 * Helper class which represents the <code>date</code> property of the
 * {@link CDateTime} widget. (Note that there does exist a
 * CDateTimeObservableValue but it did not work for me). It can be used for data
 * binding. You can obtain the {@link IObservableValue} of the <code>date</code>
 * property with this code:
 * 
 * <pre>
 * IObservableValue dateObservable = new CDateTimeDateProperty()
 * 		.observe(dateTimeWidget);
 * </pre>
 * 
 * @author Henno Vermeulen
 * @see DateChooserComboDateProperty
 */
public class CDateTimeDateProperty extends WidgetValueProperty {

	public CDateTimeDateProperty() {
		/*
		 * Note that SWT.Modify is not sufficient for CDateTime because it
		 * sometimes does not fire SWT.Modify when typing in the month.
		 * SWT.Selection works fine.
		 */
		super(SWT.Selection);
	}

	@Override
	protected Object doGetValue(Object source) {
		return ((CDateTime) source).getSelection();
	}

	@Override
	protected void doSetValue(Object source, Object value) {
		((CDateTime) source).setSelection((Date) value);
	}

	@Override
	public Object getValueType() {
		return Date.class;
	}

}

package nl.hm.ilja.ui.databinding;

import org.eclipse.nebula.widgets.datechooser.DateChooserCombo;
import org.eclipse.nebula.widgets.datechooser.DateChooserComboCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.widgets.Composite;

/**
 * Extension of {@link DateChooserComboCellEditor} which fixes two small bugs
 * (see {@link #doSetValue(Object)}, {@link #getDoubleClickTimeout()}) and
 * enhances usability by committing the value on enter (see
 * {@link #configureCommitOnEnter()}).
 * 
 * @author Henno Vermeulen
 */
public final class DateChooserComboCellEditorExtension extends
		DateChooserComboCellEditor {

	public DateChooserComboCellEditorExtension(Composite parent) {
		super(parent);
		init();
	}

	public DateChooserComboCellEditorExtension(Composite parent, int style) {
		super(parent, style);
		init();
	}

	private void init() {
		configureCommitOnEnter();
	}

	private void configureCommitOnEnter() {
		super.getCombo().addKeyListener(new KeyAdapter() {
			@Override
			public void keyPressed(KeyEvent e) {
				if (e.keyCode == SWT.KEYPAD_CR || e.character == SWT.CR) {
					fireApplyEditorValue();
					deactivate();
				}
			}
		});
	}

	/**
	 * Overridden to return 0 to solve the problem that the calendar button of
	 * the {@link DateChooserCombo} cannot be clicked but instead cell editing
	 * stops if you "triple" click on the right side of the cell. With this fix
	 * you can now start cell editing and open the calendar more quickly.
	 */
	@Override
	protected int getDoubleClickTimeout() {
		return 0;
	}

	/**
	 * Overridden to allow setting null values from the model to the editor.
	 * Without this fix, a null value is replaced by the last selected date in
	 * the combo cell editor even when you do not want to change anything.
	 */
	@Override
	protected void doSetValue(Object value) {
		if (value == null) {
			super.getCombo().setValue(null);
		} else {
			super.doSetValue(value);
		}
	}

}