| /******************************************************************************* |
| * Copyright (c) 2019 Syntevo and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Syntevo - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.tests.manual; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public final class Bug548982_TreeAddRemoveMany { |
| // Options |
| // Java only |
| private static boolean CREATE_CTOR_2PARAM = false; |
| // Native & Java |
| private static boolean LOCK_REDRAW = false; |
| private static boolean CREATE_AFTER_EXPAND = false; |
| private static boolean CREATE_REVERSE_ORDER = false; |
| private static boolean DELETE_PARENT_ITEM = false; |
| private static boolean DELETE_AFTER_COLLAPSE = false; |
| private static int NUM_ITEMS = 20000; |
| |
| private static Tree tree; |
| private static TreeItem rootItem; |
| private static int iteration = 0; |
| |
| private static void CreateRootItem() { |
| rootItem = new TreeItem(tree, SWT.NONE, 0); |
| rootItem.setText("Root"); |
| |
| CreateExpanderSubItem(); |
| } |
| |
| private static void CreateExpanderSubItem() { |
| new TreeItem(rootItem, SWT.NONE); |
| } |
| |
| private static void CreateTreeItems() { |
| iteration++; |
| |
| final long start = System.currentTimeMillis(); |
| |
| if (LOCK_REDRAW) { |
| tree.setRedraw(false); |
| } |
| |
| // Delete artificial item from 'CreateExpanderSubItem' |
| rootItem.removeAll(); |
| |
| if (CREATE_REVERSE_ORDER) { |
| for (int i = NUM_ITEMS - 1; i >= 0; i--) { |
| TreeItem child = new TreeItem(rootItem, SWT.NONE, 0); |
| child.setText("Item:" + iteration + ":" + i); |
| } |
| } else { |
| for (int i = 0; i < NUM_ITEMS; i++) { |
| TreeItem child; |
| |
| if (CREATE_CTOR_2PARAM) |
| child = new TreeItem(rootItem, SWT.NONE); |
| else |
| child = new TreeItem(rootItem, SWT.NONE, i); |
| |
| child.setText("Item:" + iteration + ":" + i); |
| } |
| } |
| |
| if (LOCK_REDRAW) { |
| tree.setRedraw(true); |
| } |
| |
| final long end = System.currentTimeMillis(); |
| System.out.println("CreateTreeItems: " + (end - start) + " ms"); |
| } |
| |
| private static void DeleteTreeItems() { |
| final long start = System.currentTimeMillis(); |
| |
| if (LOCK_REDRAW) { |
| tree.setRedraw(false); |
| } |
| |
| if (DELETE_PARENT_ITEM) { |
| rootItem.dispose(); |
| CreateRootItem(); |
| } else { |
| rootItem.removeAll(); |
| CreateExpanderSubItem(); |
| } |
| |
| if (LOCK_REDRAW) { |
| tree.setRedraw(true); |
| } |
| |
| final long end = System.currentTimeMillis(); |
| System.out.println("DeleteTreeItems: " + (end - start) + " ms"); |
| } |
| |
| public static void main(String[] args) { |
| final Display display = new Display(); |
| final Shell shell = new Shell(display); |
| shell.setLayout(new GridLayout()); |
| shell.setSize(800, 600); |
| |
| Label lblHint = new Label(shell, 0); |
| lblHint.setText("Expand/collapse tree item. Timings will be printed to console. Various options are available in code near // Options."); |
| |
| tree = new Tree(shell, SWT.BORDER | SWT.VIRTUAL); |
| tree.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL)); |
| final TreeColumn col = new TreeColumn(tree, SWT.NONE); |
| col.setText("Column 1"); |
| col.setWidth(400); |
| |
| tree.addListener(SWT.Collapse, event -> { |
| if (!DELETE_AFTER_COLLAPSE) { |
| DeleteTreeItems(); |
| } else { |
| display.asyncExec(new Runnable() { |
| @Override |
| public void run() { |
| DeleteTreeItems(); |
| } |
| }); |
| } |
| }); |
| |
| tree.addListener(SWT.Expand, event -> { |
| if (!CREATE_AFTER_EXPAND) { |
| CreateTreeItems(); |
| } else { |
| display.asyncExec(new Runnable() { |
| @Override |
| public void run() { |
| CreateTreeItems(); |
| } |
| }); |
| } |
| }); |
| |
| CreateRootItem(); |
| |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| display.dispose(); |
| } |
| } |