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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).
 *
 * 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
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package com.apple.laf;

import java.awt.*;
import java.beans.PropertyVetoException;
import java.util.Vector;

import javax.swing.*;

Based on AquaInternalFrameManager
DesktopManager implementation for Aqua
Mac is more like Windows than it's like Motif/Basic
   From WindowsDesktopManager:
This class implements a DesktopManager which more closely follows
the MDI model than the DefaultDesktopManager.  Unlike the
DefaultDesktopManager policy, MDI requires that the selected
and activated child frames are the same, and that that frame
always be the top-most window.

The maximized state is managed by the DesktopManager with MDI,
instead of just being a property of the individual child frame.
This means that if the currently selected window is maximized
and another window is selected, that new window will be maximized.
See Also:
WindowsDesktopManager/**
 * Based on AquaInternalFrameManager
 *
 * DesktopManager implementation for Aqua
 *
 * Mac is more like Windows than it's like Motif/Basic
 *
 *    From WindowsDesktopManager:
 *
 * This class implements a DesktopManager which more closely follows
 * the MDI model than the DefaultDesktopManager.  Unlike the
 * DefaultDesktopManager policy, MDI requires that the selected
 * and activated child frames are the same, and that that frame
 * always be the top-most window.
 * <p>
 * The maximized state is managed by the DesktopManager with MDI,
 * instead of just being a property of the individual child frame.
 * This means that if the currently selected window is maximized
 * and another window is selected, that new window will be maximized.
 *
 * @see com.sun.java.swing.plaf.windows.WindowsDesktopManager
 */
public class AquaInternalFrameManager extends DefaultDesktopManager {
    // Variables

    /* The frame which is currently selected/activated.
     * We store this value to enforce Mac's single-selection model.
     */
    JInternalFrame fCurrentFrame;
    JInternalFrame fInitialFrame;
    AquaInternalFramePaneUI fCurrentPaneUI;

    /* The list of frames, sorted by order of creation.
     * This list is necessary because by default the order of
     * child frames in the JDesktopPane changes during frame
     * activation (the activated frame is moved to index 0).
     * We preserve the creation order so that "next" and "previous"
     * frame actions make sense.
     */
    Vector<JInternalFrame> fChildFrames = new Vector<JInternalFrame>(1);

    public void closeFrame(final JInternalFrame f) {
        if (f == fCurrentFrame) {
            activateNextFrame();
        }
        fChildFrames.removeElement(f);
        super.closeFrame(f);
    }

    public void deiconifyFrame(final JInternalFrame f) {
        JInternalFrame.JDesktopIcon desktopIcon;

        desktopIcon = f.getDesktopIcon();
        // If the icon moved, move the frame to that spot before expanding it
        // reshape does delta checks for us
        f.reshape(desktopIcon.getX(), desktopIcon.getY(), f.getWidth(), f.getHeight());
        super.deiconifyFrame(f);
    }

    void addIcon(final Container c, final JInternalFrame.JDesktopIcon desktopIcon) {
        c.add(desktopIcon);
    }

    
Removes the frame from its parent and adds its desktopIcon to the parent. /** Removes the frame from its parent and adds its desktopIcon to the parent. */
    public void iconifyFrame(final JInternalFrame f) {
        // Same as super except doesn't deactivate it
        JInternalFrame.JDesktopIcon desktopIcon;
        Container c;

        desktopIcon = f.getDesktopIcon();
        // Position depends on *current* position of frame, unlike super which reuses the first position
        final Rectangle r = getBoundsForIconOf(f);
        desktopIcon.setBounds(r.x, r.y, r.width, r.height);

        c = f.getParent();
        if (c == null) return;

        c.remove(f);
        addIcon(c, desktopIcon);
        c.repaint(f.getX(), f.getY(), f.getWidth(), f.getHeight());
    }

    // WindowsDesktopManager code
    public void activateFrame(final JInternalFrame f) {
        try {
            if (f != null) super.activateFrame(f);

            // If this is the first activation, add to child list.
            if (fChildFrames.indexOf(f) == -1) {
                fChildFrames.addElement(f);
            }

            if (fCurrentFrame != null && f != fCurrentFrame) {
                if (fCurrentFrame.isSelected()) {
                    fCurrentFrame.setSelected(false);
                }
            }

            if (f != null && !f.isSelected()) {
                f.setSelected(true);
            }

            fCurrentFrame = f;
        } catch(final PropertyVetoException e) {}
    }

    private void switchFrame(final boolean next) {
        if (fCurrentFrame == null) {
            // initialize first frame we find
            if (fInitialFrame != null) activateFrame(fInitialFrame);
            return;
        }

        final int count = fChildFrames.size();
        if (count <= 1) {
            // No other child frames.
            return;
        }

        final int currentIndex = fChildFrames.indexOf(fCurrentFrame);
        if (currentIndex == -1) {
            // the "current frame" is no longer in the list
            fCurrentFrame = null;
            return;
        }

        int nextIndex;
        if (next) {
            nextIndex = currentIndex + 1;
            if (nextIndex == count) {
                nextIndex = 0;
            }
        } else {
            nextIndex = currentIndex - 1;
            if (nextIndex == -1) {
                nextIndex = count - 1;
            }
        }
        final JInternalFrame f = fChildFrames.elementAt(nextIndex);
        activateFrame(f);
        fCurrentFrame = f;
    }

    
Activate the next child JInternalFrame, as determined by
the frames' Z-order.  If there is only one child frame, it
remains activated.  If there are no child frames, nothing
happens.
/**
     * Activate the next child JInternalFrame, as determined by
     * the frames' Z-order.  If there is only one child frame, it
     * remains activated.  If there are no child frames, nothing
     * happens.
     */
    public void activateNextFrame() {
        switchFrame(true);
    }

    
same as above but will activate a frame if none
 have been selected
/** same as above but will activate a frame if none
     *  have been selected
     */
    public void activateNextFrame(final JInternalFrame f) {
        fInitialFrame = f;
        switchFrame(true);
    }

    
Activate the previous child JInternalFrame, as determined by
the frames' Z-order.  If there is only one child frame, it
remains activated.  If there are no child frames, nothing
happens.
/**
     * Activate the previous child JInternalFrame, as determined by
     * the frames' Z-order.  If there is only one child frame, it
     * remains activated.  If there are no child frames, nothing
     * happens.
     */
    public void activatePreviousFrame() {
        switchFrame(false);
    }
}