/*
 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.javafx.scene.control.skin;

import com.sun.javafx.scene.control.DoubleField;
import javafx.application.Platform;
import javafx.beans.InvalidationListener;
import javafx.scene.Node;

/**
 */
public class DoubleFieldSkin extends InputFieldSkin {
    private InvalidationListener doubleFieldValueListener;

    
Create a new DoubleFieldSkin.
Params:
control – The DoubleField/**
     * Create a new DoubleFieldSkin.
     * @param control The DoubleField
     */
    public DoubleFieldSkin(final DoubleField 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(doubleFieldValueListener = observable -> {
            updateText();
        });
    }

    @Override public DoubleField getSkinnable() {
        return (DoubleField) 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 getSkinnable() and getNode() should return null following a call to dispose. Calling dispose twice has no effect. /**
     * 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() {
        ((DoubleField) control).valueProperty().removeListener(doubleFieldValueListener);
        super.dispose();
    }

    protected boolean accept(String text) {
        if (text.length() == 0) return true;
        if (text.matches("[0-9\\.]*")) {
            try {
                Double.parseDouble(text);
                return true;
            } catch (NumberFormatException ex) { }
        }
        return false;
    }

    protected void updateText() {
        getTextField().setText("" + ((DoubleField) control).getValue());
    }

    protected void updateValue() {
        double value = ((DoubleField) control).getValue();
        double newValue;
        String text = getTextField().getText() == null ? "" : getTextField().getText().trim();
        try {
            newValue = Double.parseDouble(text);
            if (newValue != value) {
                ((DoubleField) control).setValue(newValue);
            }
        } catch (NumberFormatException ex) {
            // Empty string most likely
            ((DoubleField) control).setValue(0);
            Platform.runLater(() -> {
                getTextField().positionCaret(1);
            });
        }
    }
}