/* * Copyright (c) 2002, 2010, 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.synth; import javax.swing.*;import java.awt.*;import java.beans.*;import javax.swing.plaf.*;import javax.swing.plaf.basic.BasicButtonUI;import javax.swing.plaf.basic.BasicHTML;import javax.swing.text.View; /** * Provides the Synth L&F UI delegate for * {@link javax.swing.JButton}. * * @author Scott Violet * @since 1.7 */public class SynthButtonUI extends BasicButtonUI implements                                 PropertyChangeListener, SynthUI {    private SynthStyle style;     /**     * Creates a new UI object for the given component.     *     * @param c component to create UI object for     * @return the UI object     */    public static ComponentUI createUI(JComponent c) {        return new SynthButtonUI();    }     /**     * @inheritDoc     */    @Override    protected void installDefaults(AbstractButton b) {        updateStyle(b);         LookAndFeel.installProperty(b, "rolloverEnabled", Boolean.TRUE);    }     /**     * @inheritDoc     */    @Override    protected void installListeners(AbstractButton b) {        super.installListeners(b);        b.addPropertyChangeListener(this);    }     void updateStyle(AbstractButton b) {        SynthContext context = getContext(b, SynthConstants.ENABLED);        SynthStyle oldStyle = style;        style = SynthLookAndFeel.updateStyle(context, this);        if (style != oldStyle) {            if (b.getMargin() == null ||                                (b.getMargin() instanceof UIResource)) {                Insets margin = (Insets)style.get(context,getPropertyPrefix() +                                                  "margin");                 if (margin == null) {                    // Some places assume margins are non-null.                    margin = SynthLookAndFeel.EMPTY_UIRESOURCE_INSETS;                }                b.setMargin(margin);            }             Object value = style.get(context, getPropertyPrefix() + "iconTextGap");            if (value != null) {                        LookAndFeel.installProperty(b, "iconTextGap", value);            }             value = style.get(context, getPropertyPrefix() + "contentAreaFilled");            LookAndFeel.installProperty(b, "contentAreaFilled",                                        value != null? value : Boolean.TRUE);             if (oldStyle != null) {                uninstallKeyboardActions(b);                installKeyboardActions(b);            }         }        context.dispose();    }     /**     * @inheritDoc     */    @Override    protected void uninstallListeners(AbstractButton b) {        super.uninstallListeners(b);        b.removePropertyChangeListener(this);    }     /**     * @inheritDoc     */    @Override    protected void uninstallDefaults(AbstractButton b) {        SynthContext context = getContext(b, ENABLED);         style.uninstallDefaults(context);        context.dispose();        style = null;    }     /**     * @inheritDoc     */    @Override    public SynthContext getContext(JComponent c) {        return getContext(c, getComponentState(c));    }     SynthContext getContext(JComponent c, int state) {        Region region = SynthLookAndFeel.getRegion(c);        return SynthContext.getContext(SynthContext.class, c, region,                                       style, state);    }     /**     * Returns the current state of the passed in <code>AbstractButton</code>.     */    private int getComponentState(JComponent c) {        int state = ENABLED;         if (!c.isEnabled()) {            state = DISABLED;        }        if (SynthLookAndFeel.selectedUI == this) {            return SynthLookAndFeel.selectedUIState | SynthConstants.ENABLED;        }        AbstractButton button = (AbstractButton) c;        ButtonModel model = button.getModel();         if (model.isPressed()) {            if (model.isArmed()) {                state = PRESSED;            }            else {                state = MOUSE_OVER;            }        }        if (model.isRollover()) {            state |= MOUSE_OVER;        }        if (model.isSelected()) {            state |= SELECTED;        }        if (c.isFocusOwner() && button.isFocusPainted()) {            state |= FOCUSED;        }        if ((c instanceof JButton) && ((JButton)c).isDefaultButton()) {            state |= DEFAULT;        }        return state;    }     /**     * @inheritDoc     */    @Override    public int getBaseline(JComponent c, int width, int height) {        if (c == null) {            throw new NullPointerException("Component must be non-null");        }        if (width < 0 || height < 0) {            throw new IllegalArgumentException(                    "Width and height must be >= 0");        }        AbstractButton b = (AbstractButton)c;        String text = b.getText();        if (text == null || "".equals(text)) {            return -1;        }        Insets i = b.getInsets();        Rectangle viewRect = new Rectangle();        Rectangle textRect = new Rectangle();        Rectangle iconRect = new Rectangle();        viewRect.x = i.left;        viewRect.y = i.top;        viewRect.width = width - (i.right + viewRect.x);        viewRect.height = height - (i.bottom + viewRect.y);         // layout the text and icon        SynthContext context = getContext(b);        FontMetrics fm = context.getComponent().getFontMetrics(            context.getStyle().getFont(context));        context.getStyle().getGraphicsUtils(context).layoutText(            context, fm, b.getText(), b.getIcon(),            b.getHorizontalAlignment(), b.getVerticalAlignment(),            b.getHorizontalTextPosition(), b.getVerticalTextPosition(),            viewRect, iconRect, textRect, b.getIconTextGap());        View view = (View)b.getClientProperty(BasicHTML.propertyKey);        int baseline;        if (view != null) {            baseline = BasicHTML.getHTMLBaseline(view, textRect.width,                                                 textRect.height);            if (baseline >= 0) {                baseline += textRect.y;            }        }        else {            baseline = textRect.y + fm.getAscent();        }        context.dispose();        return baseline;    }     // ********************************    //          Paint Methods    // ********************************     /**     * Notifies this UI delegate to repaint the specified component.     * This method paints the component background, then calls     * the {@link #paint(SynthContext,Graphics)} method.     *     * <p>In general, this method does not need to be overridden by subclasses.     * All Look and Feel rendering code should reside in the {@code paint} method.     *     * @param g the {@code Graphics} object used for painting     * @param c the component being painted     * @see #paint(SynthContext,Graphics)     */    @Override    public void update(Graphics g, JComponent c) {        SynthContext context = getContext(c);         SynthLookAndFeel.update(context, g);        paintBackground(context, g, c);        paint(context, g);        context.dispose();    }     /**     * Paints the specified component according to the Look and Feel.     * <p>This method is not used by Synth Look and Feel.     * Painting is handled by the {@link #paint(SynthContext,Graphics)} method.     *     * @param g the {@code Graphics} object used for painting     * @param c the component being painted     * @see #paint(SynthContext,Graphics)     */    @Override    public void paint(Graphics g, JComponent c) {        SynthContext context = getContext(c);         paint(context, g);        context.dispose();    }     /**     * Paints the specified component.     *     * @param context context for the component being painted     * @param g the {@code Graphics} object used for painting     * @see #update(Graphics,JComponent)     */    protected void paint(SynthContext context, Graphics g) {        AbstractButton b = (AbstractButton)context.getComponent();         g.setColor(context.getStyle().getColor(context,                                               ColorType.TEXT_FOREGROUND));        g.setFont(style.getFont(context));        context.getStyle().getGraphicsUtils(context).paintText(            context, g, b.getText(), getIcon(b),            b.getHorizontalAlignment(), b.getVerticalAlignment(),            b.getHorizontalTextPosition(), b.getVerticalTextPosition(),            b.getIconTextGap(), b.getDisplayedMnemonicIndex(),            getTextShiftOffset(context));    }     void paintBackground(SynthContext context, Graphics g, JComponent c) {        if (((AbstractButton) c).isContentAreaFilled()) {            context.getPainter().paintButtonBackground(context, g, 0, 0,                                                       c.getWidth(),                                                       c.getHeight());        }    }     /**     * @inheritDoc     */    @Override    public void paintBorder(SynthContext context, Graphics g, int x,                            int y, int w, int h) {        context.getPainter().paintButtonBorder(context, g, x, y, w, h);    }     /**     * Returns the default icon. This should not callback     * to the JComponent.     *     * @param b button the icon is associated with     * @return default icon     */    protected Icon getDefaultIcon(AbstractButton b) {        SynthContext context = getContext(b);        Icon icon = context.getStyle().getIcon(context, getPropertyPrefix() + "icon");        context.dispose();        return icon;    }     /**     * Returns the Icon to use for painting the button. The icon is chosen with     * respect to the current state of the button.     *     * @param b button the icon is associated with     * @return an icon     */    protected Icon getIcon(AbstractButton b) {        Icon icon = b.getIcon();        ButtonModel model = b.getModel();         if (!model.isEnabled()) {            icon = getSynthDisabledIcon(b, icon);        } else if (model.isPressed() && model.isArmed()) {            icon = getPressedIcon(b, getSelectedIcon(b, icon));        } else if (b.isRolloverEnabled() && model.isRollover()) {            icon = getRolloverIcon(b, getSelectedIcon(b, icon));        } else if (model.isSelected()) {            icon = getSelectedIcon(b, icon);        } else {            icon = getEnabledIcon(b, icon);        }        if(icon == null) {            return getDefaultIcon(b);        }        return icon;    }     /**     * This method will return the icon that should be used for a button.  We     * only want to use the synth icon defined by the style if the specific     * icon has not been defined for the button state and the backup icon is a     * UIResource (we set it, not the developer).     *     * @param b button     * @param specificIcon icon returned from the button for the specific state     * @param defaultIcon fallback icon     * @param state the synth state of the button     */    private Icon getIcon(AbstractButton b, Icon specificIcon, Icon defaultIcon,            int state) {        Icon icon = specificIcon;        if (icon == null) {            if (defaultIcon instanceof UIResource) {                icon = getSynthIcon(b, state);                if (icon == null) {                    icon = defaultIcon;                }            } else {                icon = defaultIcon;            }        }        return icon;    }     private Icon getSynthIcon(AbstractButton b, int synthConstant) {        return style.getIcon(getContext(b, synthConstant), getPropertyPrefix() + "icon");    }     private Icon getEnabledIcon(AbstractButton b, Icon defaultIcon) {        if (defaultIcon == null) {            defaultIcon = getSynthIcon(b, SynthConstants.ENABLED);        }        return defaultIcon;    }     private Icon getSelectedIcon(AbstractButton b, Icon defaultIcon) {        return getIcon(b, b.getSelectedIcon(), defaultIcon,                SynthConstants.SELECTED);    }     private Icon getRolloverIcon(AbstractButton b, Icon defaultIcon) {        ButtonModel model = b.getModel();        Icon icon;        if (model.isSelected()) {            icon = getIcon(b, b.getRolloverSelectedIcon(), defaultIcon,                    SynthConstants.MOUSE_OVER | SynthConstants.SELECTED);        } else {            icon = getIcon(b, b.getRolloverIcon(), defaultIcon,                    SynthConstants.MOUSE_OVER);        }        return icon;    }     private Icon getPressedIcon(AbstractButton b, Icon defaultIcon) {        return getIcon(b, b.getPressedIcon(), defaultIcon,                SynthConstants.PRESSED);    }     private Icon getSynthDisabledIcon(AbstractButton b, Icon defaultIcon) {        ButtonModel model = b.getModel();        Icon icon;        if (model.isSelected()) {            icon = getIcon(b, b.getDisabledSelectedIcon(), defaultIcon,                    SynthConstants.DISABLED | SynthConstants.SELECTED);        } else {            icon = getIcon(b, b.getDisabledIcon(), defaultIcon,                    SynthConstants.DISABLED);        }        return icon;    }     /**     * Returns the amount to shift the text/icon when painting.     */    private int getTextShiftOffset(SynthContext state) {        AbstractButton button = (AbstractButton)state.getComponent();        ButtonModel model = button.getModel();         if (model.isArmed() && model.isPressed() &&                               button.getPressedIcon() == null) {            return state.getStyle().getInt(state, getPropertyPrefix() +                                           "textShiftOffset", 0);        }        return 0;    }     // ********************************    //          Layout Methods    // ********************************     /**     * @inheritDoc     */    @Override    public Dimension getMinimumSize(JComponent c) {        if (c.getComponentCount() > 0 && c.getLayout() != null) {            return null;        }        AbstractButton b = (AbstractButton)c;        SynthContext ss = getContext(c);        Dimension size = ss.getStyle().getGraphicsUtils(ss).getMinimumSize(               ss, ss.getStyle().getFont(ss), b.getText(), getSizingIcon(b),               b.getHorizontalAlignment(), b.getVerticalAlignment(),               b.getHorizontalTextPosition(),               b.getVerticalTextPosition(), b.getIconTextGap(),               b.getDisplayedMnemonicIndex());         ss.dispose();        return size;    }     /**     * @inheritDoc     */    @Override    public Dimension getPreferredSize(JComponent c) {        if (c.getComponentCount() > 0 && c.getLayout() != null) {            return null;        }        AbstractButton b = (AbstractButton)c;        SynthContext ss = getContext(c);        Dimension size = ss.getStyle().getGraphicsUtils(ss).getPreferredSize(               ss, ss.getStyle().getFont(ss), b.getText(), getSizingIcon(b),               b.getHorizontalAlignment(), b.getVerticalAlignment(),               b.getHorizontalTextPosition(),               b.getVerticalTextPosition(), b.getIconTextGap(),               b.getDisplayedMnemonicIndex());         ss.dispose();        return size;    }     /**     * @inheritDoc     */    @Override    public Dimension getMaximumSize(JComponent c) {        if (c.getComponentCount() > 0 && c.getLayout() != null) {            return null;        }

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