Java JTree autoscroll(JTree tree, Point cursorLocation)

Description

autoscroll

License

Open Source License

Declaration

private static void autoscroll(JTree tree, Point cursorLocation) 

Method Source Code

//package com.java2s;
/* Copyright (c) 2010, Carl Burch. License information is located in the
 * com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */

import java.awt.Insets;
import java.awt.Point;
import java.awt.Rectangle;

import javax.swing.JTree;

public class Main {
    private static final Insets DEFAULT_INSETS = new Insets(20, 20, 20, 20);

    private static void autoscroll(JTree tree, Point cursorLocation) {
        Insets insets = DEFAULT_INSETS;
        Rectangle outer = tree.getVisibleRect();
        Rectangle inner = new Rectangle(outer.x + insets.left, outer.y
                + insets.top, outer.width - (insets.left + insets.right),
                outer.height - (insets.top + insets.bottom));
        if (!inner.contains(cursorLocation)) {
            Rectangle scrollRect = new Rectangle(cursorLocation.x
                    - insets.left, cursorLocation.y - insets.top,
                    insets.left + insets.right, insets.top + insets.bottom);
            tree.scrollRectToVisible(scrollRect);
        }/*from   ww  w .  j  a  v  a2s .co  m*/
    }
}

Related

1. applyDefaultProperties(final JTree comp)
2. autoScrollIsDesirable(JTree tree)
3. clearTreeIcon(JTree tree)
4. correctRowHeight(JTree tree)
5. disposeExpressionsTree()