/*

 * Copyright (c) 1997, 2014, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.swing.plaf.basic;

import sun.awt.AppContext;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import javax.swing.text.View;

/**

 * BasicToggleButton implementation

 *

 * @author Jeff Dinkins

 */

public class BasicToggleButtonUI extends BasicButtonUI {

    private static final Object BASIC_TOGGLE_BUTTON_UI_KEY = new Object();

    // ********************************

    //          Create PLAF

    // ********************************

    /**

     * Returns an instance of {@code BasicToggleButtonUI}.

     *

     * @param b a component

     * @return an instance of {@code BasicToggleButtonUI}

     */

    public static ComponentUI createUI(JComponent b) {

        AppContext appContext = AppContext.getAppContext();

        BasicToggleButtonUI toggleButtonUI =

                (BasicToggleButtonUI) appContext.get(BASIC_TOGGLE_BUTTON_UI_KEY);

        if (toggleButtonUI == null) {

            toggleButtonUI = new BasicToggleButtonUI();

            appContext.put(BASIC_TOGGLE_BUTTON_UI_KEY, toggleButtonUI);

        }

        return toggleButtonUI;

    }

    protected String getPropertyPrefix() {

        return propertyPrefix;

    }

    // ********************************

    //          Paint Methods

    // ********************************

    public void paint(Graphics g, JComponent c) {

        AbstractButton b = (AbstractButton) c;

        ButtonModel model = b.getModel();

        Dimension size = b.getSize();

        FontMetrics fm = g.getFontMetrics();

        Insets i = c.getInsets();

        Rectangle viewRect = new Rectangle(size);

        viewRect.x += i.left;

        viewRect.y += i.top;

        viewRect.width -= (i.right + viewRect.x);

        viewRect.height -= (i.bottom + viewRect.y);

        Rectangle iconRect = new Rectangle();

        Rectangle textRect = new Rectangle();

        Font f = c.getFont();

        g.setFont(f);

        // layout the text and icon

        String text = SwingUtilities.layoutCompoundLabel(

            c, fm, b.getText(), b.getIcon(),

            b.getVerticalAlignment(), b.getHorizontalAlignment(),

            b.getVerticalTextPosition(), b.getHorizontalTextPosition(),

            viewRect, iconRect, textRect,

            b.getText() == null ? 0 : b.getIconTextGap());

        g.setColor(b.getBackground());

        if (model.isArmed() && model.isPressed() || model.isSelected()) {

            paintButtonPressed(g,b);

        }

        // Paint the Icon

        if(b.getIcon() != null) {

            paintIcon(g, b, iconRect);

        }

        // Draw the Text

        if(text != null && !text.equals("")) {

            View v = (View) c.getClientProperty(BasicHTML.propertyKey);

            if (v != null) {

               v.paint(g, textRect);

            } else {

               paintText(g, b, textRect, text);

            }

        }

        // draw the dashed focus line.

        if (b.isFocusPainted() && b.hasFocus()) {

            paintFocus(g, b, viewRect, textRect, iconRect);

        }

    }

    /**

     * Paints an icon in the specified location.

     *

     * @param g an instance of {@code Graphics}

     * @param b an instance of {@code Button}

     * @param iconRect bounds of an icon

     */

    protected void paintIcon(Graphics g, AbstractButton b, Rectangle iconRect) {

        ButtonModel model = b.getModel();

        Icon icon = null;

        if(!model.isEnabled()) {

            if(model.isSelected()) {

               icon = b.getDisabledSelectedIcon();

            } else {

               icon = b.getDisabledIcon();

            }

        } else if(model.isPressed() && model.isArmed()) {

            icon = b.getPressedIcon();

            if(icon == null) {

                // Use selected icon

                icon = b.getSelectedIcon();

            }

        } else if(model.isSelected()) {

            if(b.isRolloverEnabled() && model.isRollover()) {

                icon = b.getRolloverSelectedIcon();

                if (icon == null) {

                    icon = b.getSelectedIcon();

                }

            } else {

                icon = b.getSelectedIcon();

            }

        } else if(b.isRolloverEnabled() && model.isRollover()) {

            icon = b.getRolloverIcon();

        }

        if(icon == null) {

            icon = b.getIcon();

        }

        icon.paintIcon(b, g, iconRect.x, iconRect.y);

    }

    /**

     * Overriden so that the text will not be rendered as shifted for

     * Toggle buttons and subclasses.

     */

    protected int getTextShiftOffset() {

        return 0;

    }

}