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A Mavenisation of the Quaqua Mac OSX Swing Look and Feel (Java library) Quaqua Look and Feel (C) 2003-2010, Werner Randelshofer. Mavenisation by Matt Gumbley, DevZendo.org - for problems with Mavenisation, see Matt; for issues with Quaqua, see the Quaqua home page. For full license details, see http://randelshofer.ch/quaqua/license.html

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/*
 * @(#)QuaquaScrollPaneLayout.java  
 *
 * Copyright (c) 2005-2010 Werner Randelshofer, Immensee, Switzerland.
 * All rights reserved.
 *
 * You may not use, copy or modify this file, except in compliance with the
 * license agreement you entered into with Werner Randelshofer.
 * For details see accompanying license terms.
 */

package ch.randelshofer.quaqua;

import java.awt.*;
import javax.swing.*;
/**
 * The QuaquaScrollPaneLayout ensures that the vertical and the horizontal
 * scroll bar of a JScrollPane do not intersect with the grow-box of a
 * JFrame or a JDialog.
 * 
 * Note: This layout manager is only used, when we know that the grow-box
 * intrudes into frames and dialogs. Therefore we do not have to explicitly
 * check for this in this layout manager.
 *
 * @author  Werner Randelshofer
 * @version $Id: QuaquaScrollPaneLayout.java 361 2010-11-21 11:19:20Z wrandelshofer $
 */
public class QuaquaScrollPaneLayout extends ScrollPaneLayout {
    private final static int GROW_BOX_WIDTH = 15;
    private final static int GROW_BOX_HEIGHT = 15;
    /**
     * Creates a new instance.
     */
    public QuaquaScrollPaneLayout() {
    }
    
    public void layoutContainer(Container parent) {
        super.layoutContainer(parent);
        
        // In case of a regular sized scroll pane, check if only one of the
        // scroll bars is visible
        // In case of a small or mini sized scroll pane, check if at least
        // one of the scrollbars is visible
        boolean vsbVisible = vsb != null && vsb.isVisible();
        boolean hsbVisible = hsb != null && hsb.isVisible();
        int fontSize = Math.min(parent.getFont().getSize(),
        (vsb != null && vsb.getFont() != null) ? vsb.getFont().getSize() : Integer.MAX_VALUE)
        ;
        if (fontSize >= 13 && vsbVisible != hsbVisible
        || fontSize < 13 && (vsbVisible || hsbVisible)) {
            
            // Check if the parent is on a frame or a dialog with an intruding grow-box
            JRootPane rootPane = SwingUtilities.getRootPane(parent);
            if (rootPane != null
            && (rootPane.getParent() instanceof Frame && ((Frame) rootPane.getParent()).isResizable()
            || rootPane.getParent() instanceof Dialog && ((Dialog) rootPane.getParent()).isResizable()
            )
            ) {
                // Check if the bounds of the parent intersects with the bounds
                // of the grow-box
                int x = 0;
                int y = 0;
                for(Component c = parent; c != rootPane; c = c.getParent()) {
                    // Don't avoid grow-box if we are on a JViewport
                    if (c instanceof JViewport) {
                        return;
                    }
                    x += c.getX();
                    y += c.getY();
                }
                if (x + parent.getWidth() > rootPane.getWidth() - GROW_BOX_WIDTH
                && y + parent.getHeight() > rootPane.getHeight() - GROW_BOX_HEIGHT) {
                    Insets insets = parent.getInsets();

                    if (vsbVisible) {
                        vsb.setSize(
                        vsb.getWidth(), 
                        parent.getHeight() - insets.top - Math.max(insets.bottom, GROW_BOX_HEIGHT)
                        );
                    }
                    if (hsbVisible) {
                        hsb.setSize(
                        parent.getWidth() - insets.left - Math.max(insets.right, GROW_BOX_WIDTH),
                        hsb.getHeight()
                        );
                    }
                }
            }
        }
    }
    
    
    
    /**
     * The UI resource version of ScrollPaneLayout.
     */
    public static class UIResource extends QuaquaScrollPaneLayout implements javax.swing.plaf.UIResource {}
}