/* * 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 javax.swing.plaf.*;import javax.swing.plaf.basic.*;import javax.swing.text.View;import java.awt.Dimension;import java.awt.Rectangle;import java.awt.Insets;import java.awt.Graphics;import java.awt.FontMetrics;import java.beans.PropertyChangeEvent; /** * Provides the Synth L&F UI delegate for * {@link javax.swing.JLabel}. * * @author Scott Violet * @since 1.7 */public class SynthLabelUI extends BasicLabelUI implements SynthUI {    private SynthStyle style;     /**     * Returns the LabelUI implementation used for the skins look and feel.     *     * @param c component to create UI object for     * @return the UI object     */    public static ComponentUI createUI(JComponent c){        return new SynthLabelUI();    }     /**     * @inheritDoc     */    @Override    protected void installDefaults(JLabel c) {        updateStyle(c);    }     void updateStyle(JLabel c) {        SynthContext context = getContext(c, ENABLED);        style = SynthLookAndFeel.updateStyle(context, this);        context.dispose();    }     /**     * @inheritDoc     */    @Override    protected void uninstallDefaults(JLabel c){        SynthContext context = getContext(c, ENABLED);         style.uninstallDefaults(context);        context.dispose();        style = null;    }     /**     * @inheritDoc     */    @Override    public SynthContext getContext(JComponent c) {        return getContext(c, getComponentState(c));    }     private SynthContext getContext(JComponent c, int state) {        return SynthContext.getContext(SynthContext.class, c,                    SynthLookAndFeel.getRegion(c), style, state);    }     private int getComponentState(JComponent c) {        int state = SynthLookAndFeel.getComponentState(c);        if (SynthLookAndFeel.selectedUI == this &&                        state == SynthConstants.ENABLED) {            state = SynthLookAndFeel.selectedUIState | SynthConstants.ENABLED;        }        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");        }        JLabel label = (JLabel)c;        String text = label.getText();        if (text == null || "".equals(text)) {            return -1;        }        Insets i = label.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(label);        FontMetrics fm = context.getComponent().getFontMetrics(            context.getStyle().getFont(context));        context.getStyle().getGraphicsUtils(context).layoutText(            context, fm, label.getText(), label.getIcon(),            label.getHorizontalAlignment(), label.getVerticalAlignment(),            label.getHorizontalTextPosition(), label.getVerticalTextPosition(),            viewRect, iconRect, textRect, label.getIconTextGap());        View view = (View)label.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;    }     /**     * 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);        context.getPainter().paintLabelBackground(context,                          g, 0, 0, c.getWidth(), c.getHeight());        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) {        JLabel label = (JLabel)context.getComponent();        Icon icon = (label.isEnabled()) ? label.getIcon() :                                          label.getDisabledIcon();         g.setColor(context.getStyle().getColor(context,                                               ColorType.TEXT_FOREGROUND));        g.setFont(style.getFont(context));        context.getStyle().getGraphicsUtils(context).paintText(            context, g, label.getText(), icon,            label.getHorizontalAlignment(), label.getVerticalAlignment(),            label.getHorizontalTextPosition(), label.getVerticalTextPosition(),            label.getIconTextGap(), label.getDisplayedMnemonicIndex(), 0);    }     /**     * @inheritDoc     */    @Override    public void paintBorder(SynthContext context, Graphics g, int x,                            int y, int w, int h) {        context.getPainter().paintLabelBorder(context, g, x, y, w, h);    }     /**     * @inheritDoc     */    @Override    public Dimension getPreferredSize(JComponent c) {        JLabel label = (JLabel)c;        Icon icon = (label.isEnabled()) ? label.getIcon() :                                          label.getDisabledIcon();        SynthContext context = getContext(c);        Dimension size = context.getStyle().getGraphicsUtils(context).            getPreferredSize(               context, context.getStyle().getFont(context), label.getText(),               icon, label.getHorizontalAlignment(),               label.getVerticalAlignment(), label.getHorizontalTextPosition(),               label.getVerticalTextPosition(), label.getIconTextGap(),               label.getDisplayedMnemonicIndex());         context.dispose();        return size;    }     /**     * @inheritDoc     */    @Override    public Dimension getMinimumSize(JComponent c) {        JLabel label = (JLabel)c;        Icon icon = (label.isEnabled()) ? label.getIcon() :                                          label.getDisabledIcon();        SynthContext context = getContext(c);        Dimension size = context.getStyle().getGraphicsUtils(context).            getMinimumSize(               context, context.getStyle().getFont(context), label.getText(),               icon, label.getHorizontalAlignment(),               label.getVerticalAlignment(), label.getHorizontalTextPosition(),               label.getVerticalTextPosition(), label.getIconTextGap(),               label.getDisplayedMnemonicIndex());         context.dispose();        return size;    }     /**     * @inheritDoc     */    @Override    public Dimension getMaximumSize(JComponent c) {        JLabel label = (JLabel)c;        Icon icon = (label.isEnabled()) ? label.getIcon() :                                          label.getDisabledIcon();        SynthContext context = getContext(c);        Dimension size = context.getStyle().getGraphicsUtils(context).               getMaximumSize(               context, context.getStyle().getFont(context), label.getText(),               icon, label.getHorizontalAlignment(),               label.getVerticalAlignment(), label.getHorizontalTextPosition(),               label.getVerticalTextPosition(), label.getIconTextGap(),               label.getDisplayedMnemonicIndex());         context.dispose();        return size;    }     /**     * @inheritDoc     */    @Override    public void propertyChange(PropertyChangeEvent e) {        super.propertyChange(e);        if (SynthLookAndFeel.shouldUpdateStyle(e)) {            updateStyle((JLabel)e.getSource());        }    }}