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package org.eclipse.fx.ecp.ui.controls.numeric;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
import org.eclipse.fx.ecp.ui.ECPControl;
import org.eclipse.fx.ecp.ui.controls.ECPControlBase;

public class IntegerSpinner extends NumberSpinner {
	
	public static final Integer DEFAULT_VALUE = 0;

	public IntegerSpinner(IItemPropertyDescriptor propertyDescriptor, final EObject modelElement, final EditingDomain editingDomain) {
		super(propertyDescriptor, modelElement, editingDomain);

		
		setSkin(new NumberSpinnerSkin<NumberSpinner, Integer>(this) {

			@Override
			boolean validate(String literal) {
				if (literal.matches("^\\-?[0-9]*$")) {
					try {
						Integer.parseInt(literal);
						return true;
					} catch (NumberFormatException e) {
						// do nothing
					}
				}
				return false;
			}

			@Override
			Integer decrease(Integer value) {
				if(value == null)
					value = DEFAULT_VALUE;
				return value - 1;
			}

			@Override
			Integer increase(Integer value) {
				if(value == null)
					value = DEFAULT_VALUE;
				return value + 1;
			}

			@Override
			Integer parseValue(String literal) {
				try {
					return Integer.parseInt(literal);
				} catch (NumberFormatException e) {
					return DEFAULT_VALUE;
				}
			}

		});
	}
	
	public static class Factory implements ECPControl.Factory {

		@Override
		public ECPControlBase createControl(IItemPropertyDescriptor itemPropertyDescriptor, EObject modelElement, EditingDomain editingDomain) {
			return new IntegerSpinner(itemPropertyDescriptor, modelElement, editingDomain);
		}

	}

}

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