https://openjdk.java.net/ 
/*
 * Copyright (c) 2002, 2013, 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 java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.BasicEditorPaneUI;
import java.beans.PropertyChangeEvent;


Provides the Synth L&F UI delegate for JEditorPane. 
Author: Shannon Hickey
Since:1.7
/**
 * Provides the Synth L&F UI delegate for
 * {@link javax.swing.JEditorPane}.
 *
 * @author  Shannon Hickey
 * @since 1.7
 */
public class SynthEditorPaneUI extends BasicEditorPaneUI implements SynthUI {
    private SynthStyle style;
    /*
     * I would prefer to use UIResource instad of this.
     * Unfortunately Boolean is a final class
     */
    private Boolean localTrue = Boolean.TRUE;

    private boolean updateKBAction = true;

    
Creates a new UI object for the given component.

Params:
  • c – component to create UI object for
Returns:the UI object
/**
     * 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 SynthEditorPaneUI();
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void installDefaults() {
        // Installs the text cursor on the component
        super.installDefaults();
        JComponent c = getComponent();
        Object clientProperty =
            c.getClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES);
        if (clientProperty == null) {
            c.putClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES, localTrue);
        }
        updateStyle(getComponent(), true);
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void uninstallDefaults() {
        SynthContext context = getContext(getComponent(), ENABLED);
        JComponent c = getComponent();
        c.putClientProperty("caretAspectRatio", null);

        style.uninstallDefaults(context);
        style = null;

        Object clientProperty =
            c.getClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES);
        if (clientProperty == localTrue) {
            c.putClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES,
                                             Boolean.FALSE);
        }
        super.uninstallDefaults();
    }

    
This method gets called when a bound property is changed
on the associated JTextComponent.  This is a hook
which UI implementations may change to reflect how the
UI displays bound properties of JTextComponent subclasses.
This is implemented to rebuild the ActionMap based upon an
EditorKit change.

Params:
  • evt – the property change event
/**
     * This method gets called when a bound property is changed
     * on the associated JTextComponent.  This is a hook
     * which UI implementations may change to reflect how the
     * UI displays bound properties of JTextComponent subclasses.
     * This is implemented to rebuild the ActionMap based upon an
     * EditorKit change.
     *
     * @param evt the property change event
     */
    @Override
    protected void propertyChange(PropertyChangeEvent evt) {

        if (evt.getPropertyName().equals("keymap")) {
            if (evt.getNewValue() != null)
            {
                updateKBAction = false;
            } else {
                updateKBAction = true;
            }
        }
        if (SynthLookAndFeel.shouldUpdateStyle(evt)) {
            updateStyle((JTextComponent)evt.getSource(), updateKBAction);
        }
        super.propertyChange(evt);
    }

    private void updateStyle(JTextComponent comp, boolean updateKBAction) {
        SynthContext context = getContext(comp, ENABLED);
        SynthStyle oldStyle = style;

        style = SynthLookAndFeel.updateStyle(context, this);

        if (style != oldStyle) {
            SynthTextFieldUI.updateStyle(comp, context, getPropertyPrefix());

            if (oldStyle != null && updateKBAction) {
                uninstallKeyboardActions();
                installKeyboardActions();
            }
        }
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    public SynthContext getContext(JComponent c) {
        return getContext(c, getComponentState(c));
    }

    private SynthContext getContext(JComponent c, int state) {
        return SynthContext.getContext(c, style, state);
    }

    private int getComponentState(JComponent c) {
        return SynthLookAndFeel.getComponentState(c);
    }

    
Notifies this UI delegate to repaint the specified component. This method paints the component background, then calls the paint(SynthContext, Graphics) method. 
In general, this method does not need to be overridden by subclasses. All Look and Feel rendering code should reside in the paint method. 
Params:
  • g – the Graphics object used for painting
  • c – the component being painted
See Also:
/**
     * 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);
    }

    
Paints the specified component.

Params:
  • context – context for the component being painted
  • g – the Graphics object used for painting
See Also:
/**
     * 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) {
        super.paint(g, getComponent());
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void paintBackground(Graphics g) {
        // Overriden to do nothing, all our painting is done from update/paint.
    }

    void paintBackground(SynthContext context, Graphics g, JComponent c) {
        context.getPainter().paintEditorPaneBackground(context, g, 0, 0,
                                                  c.getWidth(), c.getHeight());
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    public void paintBorder(SynthContext context, Graphics g, int x,
                            int y, int w, int h) {
        context.getPainter().paintEditorPaneBorder(context, g, x, y, w, h);
    }
}