IntegerFieldSkin.java

package src.com.fxexperience.javafx.scene.control.skin;

import javafx.application.Platform;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.scene.Node;
import src.com.fxexperience.javafx.scene.control.IntegerField;

/**
 */
public class IntegerFieldSkin extends InputFieldSkin {

	private InvalidationListener integerFieldValueListener;

	/**
	 * Create a new IntegerFieldSkin.
	 * 
	 * @param control
	 *            The IntegerField
	 */
	public IntegerFieldSkin(final IntegerField control) {

		super(control);

		// Whenever the value changes on the control, we need to update the text
		// in the TextField. The only time this is not the case is when the
		// update
		// to the control happened as a result of an update in the text
		// textField.
		control.valueProperty().addListener(
				integerFieldValueListener = new InvalidationListener() {

					@Override
					public void invalidated(Observable observable) {

						updateText();
					}
				});
	}

	@Override
	public IntegerField getSkinnable() {

		return (IntegerField) control;
	}

	@Override
	public Node getNode() {

		return getTextField();
	}

	/**
	 * Called by a Skinnable when the Skin is replaced on the Skinnable. This
	 * method allows a Skin to implement any logic necessary to clean up itself
	 * after the Skin is no longer needed. It may be used to release native
	 * resources. The methods {@link #getSkinnable()} and {@link #getNode()}
	 * should return null following a call to dispose. Calling dispose twice has
	 * no effect.
	 */
	@Override
	public void dispose() {

		((IntegerField) control).valueProperty().removeListener(
				integerFieldValueListener);
		super.dispose();
	}

	protected boolean accept(String text) {

		if (text.length() == 0)
			return true;
		if (text.matches("[0-9]*")) {
			try {
				Integer.parseInt(text);
				return true;
			} catch (NumberFormatException ex) {
			}
		}
		return false;
	}

	protected void updateText() {

		getTextField().setText("" + ((IntegerField) control).getValue());
	}

	protected void updateValue() {

		int value = ((IntegerField) control).getValue();
		int newValue;
		String text = getTextField().getText() == null ? "" : getTextField()
				.getText().trim();
		try {
			newValue = Integer.parseInt(text);
			if (newValue != value) {
				((IntegerField) control).setValue(newValue);
			}
		} catch (NumberFormatException ex) {
			// Empty string most likely
			((IntegerField) control).setValue(0);
			Platform.runLater(new Runnable() {

				@Override
				public void run() {

					getTextField().positionCaret(1);
				}
			});
		}
	}
}