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 * Copyright (c) 2002, 2006, 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.
 *
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package javax.swing.plaf.synth;

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

import sun.swing.plaf.synth.SynthUI;

Basis of a look and feel for a JTextField in the Synth
look and feel.

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 JavaBeansTM
has been added to the java.beans package. Please see XMLEncoder. 
Author:
 Shannon Hickey/**
 * Basis of a look and feel for a JTextField in the Synth
 * look and feel.
 * <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<sup><font size="-2">TM</font></sup>
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author  Shannon Hickey
 */
class SynthTextFieldUI
    extends BasicTextFieldUI
    implements SynthUI, FocusListener
{
    private SynthStyle style;

    
Creates a UI for a JTextField.
Params:
c – the text field
Returns:
the UI/**
     * Creates a UI for a JTextField.
     *
     * @param c the text field
     * @return the UI
     */
    public static ComponentUI createUI(JComponent c) {
        return new SynthTextFieldUI();
    }

    public SynthTextFieldUI() {
        super();
    }

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

        style = SynthLookAndFeel.updateStyle(context, this);

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

            if (oldStyle != null) {
                uninstallKeyboardActions();
                installKeyboardActions();
            }
        }
        context.dispose();
    }

    static void updateStyle(JTextComponent comp, SynthContext context,
            String prefix) {
        SynthStyle style = context.getStyle();

        Color color = comp.getCaretColor();
        if (color == null || color instanceof UIResource) {
            comp.setCaretColor(
                (Color)style.get(context, prefix + ".caretForeground"));
        }

        Color fg = comp.getForeground();
        if (fg == null || fg instanceof UIResource) {
            fg = style.getColorForState(context, ColorType.TEXT_FOREGROUND);
            if (fg != null) {
                comp.setForeground(fg);
            }
        }

        Object ar = style.get(context, prefix + ".caretAspectRatio");
        if (ar instanceof Number) {
            comp.putClientProperty("caretAspectRatio", ar);
        }

        context.setComponentState(SELECTED | FOCUSED);

        Color s = comp.getSelectionColor();
        if (s == null || s instanceof UIResource) {
            comp.setSelectionColor(
                style.getColor(context, ColorType.TEXT_BACKGROUND));
        }

        Color sfg = comp.getSelectedTextColor();
        if (sfg == null || sfg instanceof UIResource) {
            comp.setSelectedTextColor(
                style.getColor(context, ColorType.TEXT_FOREGROUND));
        }

        context.setComponentState(DISABLED);

        Color dfg = comp.getDisabledTextColor();
        if (dfg == null || dfg instanceof UIResource) {
            comp.setDisabledTextColor(
                style.getColor(context, ColorType.TEXT_FOREGROUND));
        }

        Insets margin = comp.getMargin();
        if (margin == null || margin instanceof UIResource) {
            margin = (Insets)style.get(context, prefix + ".margin");

            if (margin == null) {
                // Some places assume margins are non-null.
                margin = SynthLookAndFeel.EMPTY_UIRESOURCE_INSETS;
            }
            comp.setMargin(margin);
        }

        Caret caret = comp.getCaret();
        if (caret instanceof UIResource) {
            Object o = style.get(context, prefix + ".caretBlinkRate");
            if (o != null && o instanceof Integer) {
                Integer rate = (Integer)o;
                caret.setBlinkRate(rate.intValue());
            }
        }
    }

    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) {
        return SynthLookAndFeel.getComponentState(c);
    }

    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 interface.  This is routed to the
paintSafely method under the guarantee that
the model won't change from the view of this thread
while it's rendering (if the associated model is
derived from AbstractDocument).  This enables the
model to potentially be updated asynchronously.
/**
     * Paints the interface.  This is routed to the
     * paintSafely method under the guarantee that
     * the model won't change from the view of this thread
     * while it's rendering (if the associated model is
     * derived from AbstractDocument).  This enables the
     * model to potentially be updated asynchronously.
     */
    protected void paint(SynthContext context, Graphics g) {
        super.paint(g, getComponent());
    }

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

    public void paintBorder(SynthContext context, Graphics g, int x,
                            int y, int w, int h) {
        context.getPainter().paintTextFieldBorder(context, g, x, y, w, h);
    }

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

    
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 do nothing (i.e. the response to
properties in JTextComponent itself are handled prior
to calling this method).
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 do nothing (i.e. the response to
     * properties in JTextComponent itself are handled prior
     * to calling this method).
     *
     * @param evt the property change event
     */
    protected void propertyChange(PropertyChangeEvent evt) {
        if (SynthLookAndFeel.shouldUpdateStyle(evt)) {
            updateStyle((JTextComponent)evt.getSource());
        }
        super.propertyChange(evt);
    }

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

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

    protected void installDefaults() {
        // Installs the text cursor on the component
        super.installDefaults();
        updateStyle(getComponent());
        getComponent().addFocusListener(this);
    }

    protected void uninstallDefaults() {
        SynthContext context = getContext(getComponent(), ENABLED);

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

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

    public void installUI(JComponent c) {
        super.installUI(c);
    }
}