Java example source code file (AquaTextPasswordFieldUI.java)

This example Java source code file (AquaTextPasswordFieldUI.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

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Java - Java tags/keywords

aquapasswordview, aquatextpasswordfieldui, awt, border, capslocksymbolpainter, component, element, event, generalpath, geometry, graphics, gui, insets, jcomponent, jtextcomponent, keyevent, override, shape, string, swing

The AquaTextPasswordFieldUI.java Java example source code

/*
 * Copyright (c) 2011, 2012, 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 com.apple.laf;

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;

import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.plaf.*;
import javax.swing.text.*;

import com.apple.laf.AquaUtils.RecyclableSingleton;
import com.apple.laf.AquaUtils.RecyclableSingletonFromDefaultConstructor;

public class AquaTextPasswordFieldUI extends AquaTextFieldUI {
    static final RecyclableSingleton<CapsLockSymbolPainter> capsLockPainter = new RecyclableSingletonFromDefaultConstructor(CapsLockSymbolPainter.class);
    static CapsLockSymbolPainter getCapsLockPainter() {
        return capsLockPainter.get();
    }

    public static ComponentUI createUI(final JComponent c) {
        return new AquaTextPasswordFieldUI();
    }

    @Override
    protected String getPropertyPrefix() {
        return "PasswordField";
    }

    @Override
    public View create(final Element elem) {
        return new AquaPasswordView(elem);
    }

    @Override
    protected void installListeners() {
        super.installListeners();
        getComponent().addKeyListener(getCapsLockPainter());
    }

    @Override
    protected void uninstallListeners() {
        getComponent().removeKeyListener(getCapsLockPainter());
        super.uninstallListeners();
    }

    @Override
    protected void paintBackgroundSafely(final Graphics g) {
        super.paintBackgroundSafely(g);

        final JTextComponent component = getComponent();
        if (component == null) return;
        if (!component.isFocusOwner()) return;

        final boolean capsLockDown = Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK);
        if (!capsLockDown) return;

        final Rectangle bounds = component.getBounds();
        getCapsLockPainter().paintBorder(component, g, bounds.x, bounds.y, bounds.width, bounds.height);
    }

    protected class AquaPasswordView extends PasswordView {
        public AquaPasswordView(final Element elem) {
            super(elem);
            setupDefaultEchoCharacter();
        }

        protected void setupDefaultEchoCharacter() {
            // this allows us to change the echo character in CoreAquaLookAndFeel.java
            final Character echoChar = (Character)UIManager.getDefaults().get(getPropertyPrefix() + ".echoChar");
            if (echoChar != null) {
                LookAndFeel.installProperty(getComponent(), "echoChar", echoChar);
            }
        }
    }

    static class CapsLockSymbolPainter extends KeyAdapter implements Border, UIResource {
        protected Shape capsLockShape;
        protected Shape getCapsLockShape() {
            if (capsLockShape != null) return capsLockShape;

            final RoundRectangle2D rect = new RoundRectangle2D.Double(0.5, 0.5, 16, 16, 8, 8);
            final GeneralPath shape = new GeneralPath(rect);
            shape.setWindingRule(Path2D.WIND_EVEN_ODD);

            // arrow
            shape.moveTo( 8.50,  2.00);
            shape.lineTo( 4.00,  7.00);
            shape.lineTo( 6.25,  7.00);
            shape.lineTo( 6.25, 10.25);
            shape.lineTo(10.75, 10.25);
            shape.lineTo(10.75,  7.00);
            shape.lineTo(13.00,  7.00);
            shape.lineTo( 8.50,  2.00);

            // base line
            shape.moveTo(10.75, 12.00);
            shape.lineTo( 6.25, 12.00);
            shape.lineTo( 6.25, 14.25);
            shape.lineTo(10.75, 14.25);
            shape.lineTo(10.75, 12.00);

            return capsLockShape = shape;
        }

        @Override
        public Insets getBorderInsets(final Component c) {
            return new Insets(0, 0, 0, 0);
        }

        @Override
        public boolean isBorderOpaque() {
            return false;
        }

        @Override
        public void paintBorder(final Component c, Graphics g, final int x, final int y, final int width, final int height) {
            g = g.create(width - 23, height / 2 - 8, 18, 18);

            g.setColor(UIManager.getColor("PasswordField.capsLockIconColor"));
            ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            ((Graphics2D)g).fill(getCapsLockShape());
            g.dispose();
        }

        @Override
        public void keyPressed(final KeyEvent e) {
            update(e);
        }

        @Override
        public void keyReleased(final KeyEvent e) {
            update(e);
        }

        void update(final KeyEvent e) {
            if (KeyEvent.VK_CAPS_LOCK != e.getKeyCode()) return;
            e.getComponent().repaint();
        }
    }
}