smoothgradienttitlepane.java

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package org.underworldlabs.swing.plaf.smoothgradient;

import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.LayoutManager;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import java.util.Locale;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JRootPane;
import javax.swing.JSeparator;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.plaf.UIResource;

/*
 * SmoothGradientTitlePane.java
 *
 * Copyright (C) 2002, 2003, 2004, 2005, 2006 Takis Diakoumis
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */


/**
 *
 * @author   Takis Diakoumis
 * @version  $Revision: 1.4 $
 * @date     $Date: 2006/05/14 06:56:07 $
 */
class SmoothGradientTitlePane extends JComponent {

    private static final Border handyEmptyBorder = new EmptyBorder(0,0,0,0);
    private static final int IMAGE_HEIGHT = 16;
    private static final int IMAGE_WIDTH = 16;

    /**
     * PropertyChangeListener added to the JRootPane.
     */
    private PropertyChangeListener propertyChangeListener;

    /**
     * JMenuBar, typically renders the system menu items.
     */
    private JMenuBar menuBar;
    /**
     * Action used to close the Window.
     */
    private Action closeAction;

    /**
     * Action used to iconify the Frame.
     */
    private Action iconifyAction;

    /**
     * Action to restore the Frame size.
     */
    private Action restoreAction;

    /**
     * Action to restore the Frame size.
     */
    private Action maximizeAction;

    /**
     * Button used to maximize or restore the Frame.
     */
    private JButton toggleButton;

    /**
     * Button used to maximize or restore the Frame.
     */
    private JButton iconifyButton;

    /**
     * Button used to maximize or restore the Frame.
     */
    private JButton closeButton;

    /**
     * Icon used for toggleButton when window is normal size.
     */
    private Icon maximizeIcon;

    /**
     * Icon used for toggleButton when window is maximized.
     */
    private Icon minimizeIcon;

    /**
     * Listens for changes in the state of the Window listener to update
     * the state of the widgets.
     */
    private WindowListener windowListener;

    /**
     * Window we're currently in.
     */
    private Window window;

    /**
     * JRootPane rendering for.
     */
    private JRootPane rootPane;

    /**
     * Room remaining in title for bumps.
     */
    private int buttonsWidth;

    /**
     * Buffered Frame.state property. As state isn't bound, this is kept
     * to determine when to avoid updating widgets.
     */
    private int state;

    /**
     * MetalRootPaneUI that created us.
     */
    private SmoothGradientRootPaneUI rootPaneUI;
    

    // Colors
    private Color inactiveBackground = UIManager.getColor("inactiveCaption");
    private Color inactiveForeground = UIManager.getColor("inactiveCaptionText");
    private Color inactiveShadow = UIManager.getColor("inactiveCaptionBorder");
    private Color activeBumpsHighlight = SmoothGradientLookAndFeel.getInternalFrameBumpsHighlight();
    private Color activeBumpsShadow = SmoothGradientLookAndFeel.getPrimaryControlDarkShadow();
    private Color activeBackground = null;
    private Color activeForeground = null;
    private Color activeShadow = null;

    public SmoothGradientTitlePane(JRootPane root, SmoothGradientRootPaneUI ui) {
        this.rootPane = root;
        rootPaneUI = ui;

        state = -1;

        installSubcomponents();
        determineColors();
        installDefaults();

        setLayout(createLayout());
    }

    /**
     * Uninstalls the necessary state.
     */
    private void uninstall() {
        uninstallListeners();
        window = null;
        removeAll();
    }

    /**
     * Installs the necessary listeners.
     */
    private void installListeners() {
        if (window != null) {
            windowListener = createWindowListener();
            window.addWindowListener(windowListener);
            propertyChangeListener = createWindowPropertyChangeListener();
            window.addPropertyChangeListener(propertyChangeListener);
        }
    }

    /**
     * Uninstalls the necessary listeners.
     */
    private void uninstallListeners() {
        if (window != null) {
            window.removeWindowListener(windowListener);
            window.removePropertyChangeListener(propertyChangeListener);
        }
    }

    /**
     * Returns the <code>WindowListener</code> to add to the
     * <code>Window</code>.
     */
    private WindowListener createWindowListener() {
        return new WindowHandler();
    }

    /**
     * Returns the <code>PropertyChangeListener</code> to install on
     * the <code>Window</code>.
     */
    private PropertyChangeListener createWindowPropertyChangeListener() {
        return new PropertyChangeHandler();
    }

    /**
     * Returns the <code>JRootPane</code> this was created for.
     */
    public JRootPane getRootPane() {
        return rootPane;
    }

    /**
     * Returns the decoration style of the <code>JRootPane</code>.
     */
    private int getWindowDecorationStyle() {
        return getRootPane().getWindowDecorationStyle();
    }

    public void addNotify() {
        super.addNotify();

        uninstallListeners();

        window = SwingUtilities.getWindowAncestor(this);
        if (window != null) {
            if (window instanceof Frame) {
                setState(((Frame)window).getExtendedState());
            }
            else {
                setState(0);
            }
            setActive(window.isActive());
            installListeners();
        }
    }

    public void removeNotify() {
        super.removeNotify();

        uninstallListeners();
        window = null;
    }

    /**
     * Adds any sub-Components contained in the <code>MetalTitlePane</code>.
     */
    private void installSubcomponents() {
        if (getWindowDecorationStyle() == JRootPane.FRAME) {
            createActions();
            menuBar = createMenuBar();
            add(menuBar);
            createButtons();
            add(iconifyButton);
            add(toggleButton);
            add(closeButton);
        }
    }

    /**
     * Determines the Colors to draw with.
     */
    private void determineColors() {

    Color _activeBumpsHighlight = activeBumpsHighlight;

        switch (getWindowDecorationStyle()) {
        case JRootPane.FRAME:
            activeBackground = UIManager.getColor("activeCaption");
            activeForeground = UIManager.getColor("activeCaptionText");
            activeShadow = UIManager.getColor("activeCaptionBorder");
            break;
        case JRootPane.ERROR_DIALOG:
            activeBackground = UIManager.getColor(
                "OptionPane.errorDialog.titlePane.background");
            activeForeground = UIManager.getColor(
                "OptionPane.errorDialog.titlePane.foreground");
            activeShadow = UIManager.getColor(
                "OptionPane.errorDialog.titlePane.shadow");
            break;
        case JRootPane.QUESTION_DIALOG:
        case JRootPane.COLOR_CHOOSER_DIALOG:
        case JRootPane.FILE_CHOOSER_DIALOG:
            activeBackground = UIManager.getColor(
                "OptionPane.questionDialog.titlePane.background");
            activeForeground = UIManager.getColor(
                "OptionPane.questionDialog.titlePane.foreground");
            activeShadow = UIManager.getColor(
                "OptionPane.questionDialog.titlePane.shadow");
            break;
        case JRootPane.WARNING_DIALOG:
            activeBackground = UIManager.getColor(
                "OptionPane.warningDialog.titlePane.background");
            activeForeground = UIManager.getColor(
                "OptionPane.warningDialog.titlePane.foreground");
            activeShadow = UIManager.getColor(
                "OptionPane.warningDialog.titlePane.shadow");
            break;
        case JRootPane.PLAIN_DIALOG:
        case JRootPane.INFORMATION_DIALOG:
        default:
            _activeBumpsHighlight = SmoothGradientLookAndFeel.getInternalFrameBumpsHighlight();
            activeBackground = UIManager.getColor("activeCaption");
            activeForeground = UIManager.getColor("activeCaptionText");
            activeShadow = UIManager.getColor("activeCaptionBorder");
            break;
        }

    }

    /**