| /******************************************************************************* |
| * Copyright (c) 2020 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.cocoa.snippets; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.internal.cocoa.OS; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.*; |
| |
| import java.util.ArrayList; |
| |
| public class Bug569529_macOS_LinkAndTextHogCPU { |
| public static void main(String[] args) { |
| System.setProperty("org.eclipse.swt.display.useSystemTheme", "true"); |
| |
| final Display display = new Display(); |
| final Shell shell = new Shell(display); |
| shell.setLayout(new GridLayout(1, true)); |
| |
| final Label hint = new Label(shell, 0); |
| hint.setText( |
| "1) Use macOS with Dark Theme\n" + |
| "2) Notice that snippet constantly hogs CPU\n" + |
| "3) On macOS 10.15, hiding controls helps but not on BigSur\n" + |
| "4) Destroying controls helps" |
| ); |
| |
| final Composite compColumns = new Composite(shell, 0); |
| compColumns.setLayout(new GridLayout(2, true)); |
| |
| { |
| final Composite parent = new Composite(compColumns, 0); |
| parent.setLayout(new GridLayout(1, true)); |
| |
| final Composite itemsParent = new Composite(parent, 0); |
| itemsParent.setLayout(new GridLayout(1, true)); |
| |
| final ArrayList<Link> items = new ArrayList<>(); |
| final Runnable createDestroy = () -> { |
| if (items.size() != 0) { |
| for (Link item : items) |
| { |
| item.dispose(); |
| } |
| items.clear(); |
| } else { |
| for (int i = 0; i < 10; i++) |
| { |
| Link item = new Link(itemsParent, 0); |
| items.add(item); |
| item.setText("This is <a>Link#" + i + "</a>"); |
| } |
| |
| itemsParent.layout(true, true); |
| } |
| }; |
| |
| Button btnCreateDestroy = new Button(parent, SWT.PUSH); |
| btnCreateDestroy.setText("Create/Destroy"); |
| btnCreateDestroy.addListener(SWT.Selection, event -> { |
| createDestroy.run(); |
| }); |
| |
| Button btnShowHide = new Button(parent, SWT.PUSH); |
| btnShowHide.setText("Show/hide"); |
| btnShowHide.addListener(SWT.Selection, event -> { |
| for (Link item : items) |
| { |
| item.setVisible(!item.getVisible()); |
| } |
| }); |
| |
| Button btnEnableDisable = new Button(parent, SWT.PUSH); |
| btnEnableDisable.setText("Enable/disable"); |
| btnEnableDisable.addListener(SWT.Selection, event -> { |
| for (Link item : items) |
| { |
| item.setEnabled(!item.getEnabled()); |
| } |
| }); |
| |
| Button btnSetRemoveColors = new Button(parent, SWT.PUSH); |
| btnSetRemoveColors.setText("Set/remove colors"); |
| final boolean[] hasColors = new boolean[]{false}; |
| btnSetRemoveColors.addListener(SWT.Selection, event -> { |
| hasColors[0] = !hasColors[0]; |
| for (Link item : items) |
| { |
| if (!hasColors[0]) { |
| item.setForeground(null); |
| item.setBackground(null); |
| } else { |
| item.setForeground(display.getSystemColor(SWT.COLOR_RED)); |
| item.setBackground(display.getSystemColor(SWT.COLOR_GREEN)); |
| } |
| } |
| }); |
| |
| createDestroy.run(); |
| } |
| |
| { |
| final Composite parent = new Composite(compColumns, 0); |
| parent.setLayout(new GridLayout(1, true)); |
| |
| final Composite itemsParent = new Composite(parent, 0); |
| itemsParent.setLayout(new GridLayout(1, true)); |
| |
| final ArrayList<Text> items = new ArrayList<>(); |
| final Runnable createDestroy = () -> { |
| if (items.size() != 0) { |
| for (Text item : items) |
| { |
| item.dispose(); |
| } |
| items.clear(); |
| } else { |
| for (int i = 0; i < 10; i++) |
| { |
| Text item = new Text(itemsParent, SWT.MULTI); |
| items.add(item); |
| item.setText("This is Text#" + i); |
| } |
| |
| itemsParent.layout(true, true); |
| } |
| }; |
| |
| Button btnCreateDestroy = new Button(parent, SWT.PUSH); |
| btnCreateDestroy.setText("Create/Destroy"); |
| btnCreateDestroy.addListener(SWT.Selection, event -> { |
| createDestroy.run(); |
| }); |
| |
| Button btnShowHide = new Button(parent, SWT.PUSH); |
| btnShowHide.setText("Show/hide"); |
| btnShowHide.addListener(SWT.Selection, event -> { |
| for (Text item : items) |
| { |
| item.setVisible(!item.getVisible()); |
| } |
| }); |
| |
| Button btnEnableDisable = new Button(parent, SWT.PUSH); |
| btnEnableDisable.setText("Enable/disable"); |
| btnEnableDisable.addListener(SWT.Selection, event -> { |
| for (Text item : items) |
| { |
| item.setEnabled(!item.getEnabled()); |
| } |
| }); |
| |
| Button btnSetRemoveColors = new Button(parent, SWT.PUSH); |
| btnSetRemoveColors.setText("Set/remove colors"); |
| final boolean[] hasColors = new boolean[]{false}; |
| btnSetRemoveColors.addListener(SWT.Selection, event -> { |
| hasColors[0] = !hasColors[0]; |
| for (Text item : items) |
| { |
| if (!hasColors[0]) { |
| item.setForeground(null); |
| item.setBackground(null); |
| } else { |
| item.setForeground(display.getSystemColor(SWT.COLOR_RED)); |
| item.setBackground(display.getSystemColor(SWT.COLOR_GREEN)); |
| } |
| } |
| }); |
| |
| createDestroy.run(); |
| } |
| |
| shell.pack(); |
| shell.open(); |
| |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| |
| display.dispose(); |
| } |
| } |