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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
 * 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).
 *
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 * 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.synth;

import javax.swing.*;
import javax.swing.text.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.BasicTextAreaUI;
import java.awt.*;
import java.awt.event.FocusListener;
import java.awt.event.FocusEvent;
import java.beans.PropertyChangeEvent;


Provides the look and feel for a plain text editor in the
Synth look and feel. In this implementation the default UI
is extended to act as a simple view factory.


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: Shannon Hickey
Since:1.7
/**
 * Provides the look and feel for a plain text editor in the
 * Synth look and feel. In this implementation the default UI
 * is extended to act as a simple view factory.
 * <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&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author  Shannon Hickey
 * @since 1.7
 */
@SuppressWarnings("serial") // Same-version serialization only
public class SynthTextAreaUI extends BasicTextAreaUI implements SynthUI {
    private Handler handler = new Handler();
    private SynthStyle style;
    private boolean updateKBAction = true;
    
Creates a UI object for a JTextArea.

Params:
  • ta – a text area
Returns:the UI object
/**
     * Creates a UI object for a JTextArea.
     *
     * @param ta a text area
     * @return the UI object
     */
    public static ComponentUI createUI(JComponent ta) {
        return new SynthTextAreaUI();
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void installDefaults() {
        // Installs the text cursor on the component
        super.installDefaults();
        updateStyle(getComponent(), true);
        getComponent().addFocusListener(handler);
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void uninstallDefaults() {
        SynthContext context = getContext(getComponent(), ENABLED);

        getComponent().putClientProperty("caretAspectRatio", null);
        getComponent().removeFocusListener(handler);

        style.uninstallDefaults(context);
        style = null;
        super.uninstallDefaults();
    }

    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, SynthLookAndFeel.getComponentState(c));
    }

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

    
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);
        context.getPainter().paintTextAreaBackground(context,
                          g, 0, 0, c.getWidth(), c.getHeight());
        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}
Overridden to do nothing.

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

    
{@inheritDoc}

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

    
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 View when the
WrapLine or the WrapStyleWord property changes.

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 View when the
     * <em>WrapLine</em> or the <em>WrapStyleWord</em> property changes.
     *
     * @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 final class Handler implements FocusListener {
        public void focusGained(FocusEvent e) {
            getComponent().repaint();
        }

        public void focusLost(FocusEvent e) {
            getComponent().repaint();
        }
    }
}