russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
76 lines
2.8 KiB
Java
76 lines
2.8 KiB
Java
/*
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* Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4270654
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* @summary Tests that selection change in JTree does not cause unnecessary
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scrolling.
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* @library /java/awt/regtesthelpers
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* @build PassFailJFrame
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* @run main/manual bug4270654
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*/
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import javax.swing.JFrame;
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import javax.swing.JScrollPane;
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import javax.swing.JTree;
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import javax.swing.tree.DefaultMutableTreeNode;
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public class bug4270654 {
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static final String INSTRUCTIONS = """
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Select the "dan" node and scroll to the right a little using the
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scrollbar. Then press down arrow key. If the tree unscrolls back
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to the left, the test FAILS. Otherwise, the test PASSES.
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""";
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public static void main(String[] args) throws Exception {
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PassFailJFrame.builder()
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.title("bug4270654 Test Instructions")
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.instructions(INSTRUCTIONS)
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.columns(40)
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.testUI(bug4270654::createUI)
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.build()
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.awaitAndCheck();
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}
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static JFrame createUI() {
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JFrame f = new JFrame("JTree Scroll Back Test");
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DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
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String[] lev1 = {"foo", "bar", "dan"};
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String[][] lev2 = {
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{},
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{"small", "a nice big node for testing"},
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{"xyz", "pqd", "a really really big node for testing"}};
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for (int i = 0; i < lev1.length; i++) {
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DefaultMutableTreeNode child = new DefaultMutableTreeNode(lev1[i]);
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root.add(child);
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for (int j = 0; j < lev2[i].length; j++)
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child.add(new DefaultMutableTreeNode(lev2[i][j]));
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}
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final JTree tree = new JTree(root);
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tree.expandRow(3);
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f.add(new JScrollPane(tree));
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f.setSize(200, 200);
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return f;
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}
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}
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