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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 *
 * 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,
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 *
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package javax.swing.plaf.metal;

import sun.swing.SwingUtilities2;
import sun.awt.AppContext;

import java.awt.*;
import java.awt.event.*;
import java.lang.ref.*;
import java.util.*;
import javax.swing.plaf.basic.BasicToggleButtonUI;

import javax.swing.*;
import javax.swing.border.*;
import javax.swing.plaf.*;
import javax.swing.*;

import java.io.Serializable;


MetalToggleButton implementation


Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans
has been added to the java.beans package. Please see XMLEncoder. 
Author:Tom Santos
/**
 * MetalToggleButton implementation
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Tom Santos
 */
@SuppressWarnings("serial") // Same-version serialization only
public class MetalToggleButtonUI extends BasicToggleButtonUI {

    private static final Object METAL_TOGGLE_BUTTON_UI_KEY = new Object();

    
The color of a focused toggle button.

/**
     * The color of a focused toggle button.
     */
    protected Color focusColor;

    
The color of a selected button.

/**
     * The color of a selected button.
     */
    protected Color selectColor;

    
The color of a disabled text.

/**
     * The color of a disabled text.
     */
    protected Color disabledTextColor;

    private boolean defaults_initialized = false;

    // ********************************
    //        Create PLAF
    // ********************************

    
Constructs a MetalToggleButtonUI. 
/**
     * Constructs a {@code MetalToggleButtonUI}.
     */
    public MetalToggleButtonUI() {}

    
Constructs the MetalToogleButtonUI. 
Params:
  • b – a component
Returns:the MetalToogleButtonUI.
/**
     * Constructs the {@code MetalToogleButtonUI}.
     *
     * @param b a component
     * @return the {@code MetalToogleButtonUI}.
     */
    public static ComponentUI createUI(JComponent b) {
        AppContext appContext = AppContext.getAppContext();
        MetalToggleButtonUI metalToggleButtonUI =
                (MetalToggleButtonUI) appContext.get(METAL_TOGGLE_BUTTON_UI_KEY);
        if (metalToggleButtonUI == null) {
            metalToggleButtonUI = new MetalToggleButtonUI();
            appContext.put(METAL_TOGGLE_BUTTON_UI_KEY, metalToggleButtonUI);
        }
        return metalToggleButtonUI;
    }

    // ********************************
    //        Install Defaults
    // ********************************
    public void installDefaults(AbstractButton b) {
        super.installDefaults(b);
        if(!defaults_initialized) {
            focusColor = UIManager.getColor(getPropertyPrefix() + "focus");
            selectColor = UIManager.getColor(getPropertyPrefix() + "select");
            disabledTextColor = UIManager.getColor(getPropertyPrefix() + "disabledText");
            defaults_initialized = true;
        }
    }

    protected void uninstallDefaults(AbstractButton b) {
        super.uninstallDefaults(b);
        defaults_initialized = false;
    }

    // ********************************
    //         Default Accessors
    // ********************************
    
Returns the color of a selected button.

Returns:the color of a selected button
/**
     * Returns the color of a selected button.
     *
     * @return the color of a selected button
     */
    protected Color getSelectColor() {
        return selectColor;
    }

    
Returns the color of a disabled text.

Returns:the color of a disabled text
/**
     * Returns the color of a disabled text.
     *
     * @return the color of a disabled text
     */
    protected Color getDisabledTextColor() {
        return disabledTextColor;
    }

    
Returns the color of a focused toggle button.

Returns:the color of a focused toggle button
/**
     * Returns the color of a focused toggle button.
     *
     * @return the color of a focused toggle button
     */
    protected Color getFocusColor() {
        return focusColor;
    }


    // ********************************
    //        Paint Methods
    // ********************************
    
If necessary paints the background of the component, then invokes
paint.

Params:
  • g – Graphics to paint to
  • c – JComponent painting on
Throws:
See Also:
Since:1.5
/**
     * If necessary paints the background of the component, then invokes
     * <code>paint</code>.
     *
     * @param g Graphics to paint to
     * @param c JComponent painting on
     * @throws NullPointerException if <code>g</code> or <code>c</code> is
     *         null
     * @see javax.swing.plaf.ComponentUI#update
     * @see javax.swing.plaf.ComponentUI#paint
     * @since 1.5
     */
    public void update(Graphics g, JComponent c) {
        AbstractButton button = (AbstractButton)c;
        if ((c.getBackground() instanceof UIResource) &&
                        button.isContentAreaFilled() && c.isEnabled()) {
            ButtonModel model = button.getModel();
            if (!MetalUtils.isToolBarButton(c)) {
                if (!model.isArmed() && !model.isPressed() &&
                        MetalUtils.drawGradient(
                        c, g, "ToggleButton.gradient", 0, 0, c.getWidth(),
                        c.getHeight(), true)) {
                    paint(g, c);
                    return;
                }
            }
            else if ((model.isRollover() || model.isSelected()) &&
                        MetalUtils.drawGradient(c, g, "ToggleButton.gradient",
                        0, 0, c.getWidth(), c.getHeight(), true)) {
                paint(g, c);
                return;
            }
        }
        super.update(g, c);
    }

    protected void paintButtonPressed(Graphics g, AbstractButton b) {
        if ( b.isContentAreaFilled() ) {
            g.setColor(getSelectColor());
            g.fillRect(0, 0, b.getWidth(), b.getHeight());
        }
    }

    protected void paintText(Graphics g, JComponent c, Rectangle textRect, String text) {
        AbstractButton b = (AbstractButton) c;
        ButtonModel model = b.getModel();
        FontMetrics fm = SwingUtilities2.getFontMetrics(b, g);
        int mnemIndex = b.getDisplayedMnemonicIndex();

        /* Draw the Text */
        if(model.isEnabled()) {
            /*** paint the text normally */
            g.setColor(b.getForeground());
        }
        else {
            /*** paint the text disabled ***/
            if (model.isSelected()) {
                g.setColor(c.getBackground());
            } else {
                g.setColor(getDisabledTextColor());
            }
        }
        SwingUtilities2.drawStringUnderlineCharAt(c, g, text, mnemIndex,
                textRect.x, textRect.y + fm.getAscent());
    }

    protected void paintFocus(Graphics g, AbstractButton b,
                              Rectangle viewRect, Rectangle textRect, Rectangle iconRect){

        Rectangle focusRect = new Rectangle();
        String text = b.getText();
        boolean isIcon = b.getIcon() != null;

        // If there is text
        if ( text != null && !text.isEmpty()) {
            if ( !isIcon ) {
                focusRect.setBounds( textRect );
            }
            else {
                focusRect.setBounds( iconRect.union( textRect ) );
            }
        }
        // If there is an icon and no text
        else if ( isIcon ) {
            focusRect.setBounds( iconRect );
        }

        g.setColor(getFocusColor());
        g.drawRect((focusRect.x-1), (focusRect.y-1),
                  focusRect.width+1, focusRect.height+1);

    }

    
Paints the appropriate icon of the button b in the
space iconRect.

Params:
  • g – Graphics to paint to
  • b – Button to render for
  • iconRect – space to render in
Throws:
Since:1.5
/**
     * Paints the appropriate icon of the button <code>b</code> in the
     * space <code>iconRect</code>.
     *
     * @param g Graphics to paint to
     * @param b Button to render for
     * @param iconRect space to render in
     * @throws NullPointerException if any of the arguments are null.
     * @since 1.5
     */
    protected void paintIcon(Graphics g, AbstractButton b, Rectangle iconRect) {
        super.paintIcon(g, b, iconRect);
    }
}