Java tutorial
package org.eclipse.swt.snippets; /******************************************************************************* * Copyright (c) 2018 IBM Corporation 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: * IBM Corporation - initial API and implementation *******************************************************************************/ import org.eclipse.swt.*; import org.eclipse.swt.custom.*; import org.eclipse.swt.events.*; /* * Snippet to display/refresh Monitor DPI dynamically if supported by OS. * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ * * @since 3.0 */ import org.eclipse.swt.graphics.*; import org.eclipse.swt.internal.*; import org.eclipse.swt.layout.*; import org.eclipse.swt.widgets.*; /** * Dynamic DPI with restart example snippet Display current monitors zoom * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ */ public class Snippet373 { private static final String IMAGE_100 = "eclipse16.png"; private static final String IMAGE_150 = "eclipse24.png"; private static final String IMAGE_200 = "eclipse32.png"; private static final String IMAGES_ROOT = "bin/org/eclipse/swt/snippets/"; private static final String IMAGE_PATH_100 = IMAGES_ROOT + IMAGE_100; private static final String IMAGE_PATH_150 = IMAGES_ROOT + IMAGE_150; private static final String IMAGE_PATH_200 = IMAGES_ROOT + IMAGE_200; static final ImageFileNameProvider filenameProvider = zoom -> { String path = null; switch (zoom) { case 150: path = IMAGE_PATH_150; break; case 200: path = IMAGE_PATH_200; break; default: path = IMAGE_PATH_100; } return path; }; @SuppressWarnings("restriction") public static void main(String[] args) { System.setProperty("swt.autoScale", "quarter"); Display display = new Display(); final Image eclipse = new Image(display, filenameProvider); final Image eclipseToolBar1 = new Image(display, filenameProvider); final Image eclipseToolBar2 = new Image(display, filenameProvider); final Image eclipseTableHeader = new Image(display, filenameProvider); final Image eclipseTableItem = new Image(display, filenameProvider); final Image eclipseTree1 = new Image(display, filenameProvider); final Image eclipseTree2 = new Image(display, filenameProvider); final Image eclipseCTab1 = new Image(display, filenameProvider); final Image eclipseCTab2 = new Image(display, filenameProvider); Shell shell = new Shell(display); shell.setText("Snippet 373"); shell.setImage(eclipse); shell.setText("DynamicDPI @ " + DPIUtil.getDeviceZoom()); shell.setLayout(new RowLayout(SWT.VERTICAL)); shell.setLocation(100, 100); shell.setSize(500, 600); shell.addListener(SWT.ZoomChanged, new Listener() { @Override public void handleEvent(Event e) { if (display.getPrimaryMonitor().equals(shell.getMonitor())) { MessageBox box = new MessageBox(shell, SWT.PRIMARY_MODAL | SWT.OK | SWT.CANCEL); box.setText(shell.getText()); box.setMessage("DPI changed, do you want to exit & restart ?"); e.doit = (box.open() == SWT.OK); if (e.doit) { shell.close(); System.out.println("Program exit."); } } } }); // Menu Menu bar = new Menu(shell, SWT.BAR); shell.setMenuBar(bar); MenuItem fileItem = new MenuItem(bar, SWT.CASCADE); fileItem.setText("&File"); fileItem.setImage(eclipse); Menu submenu = new Menu(shell, SWT.DROP_DOWN); fileItem.setMenu(submenu); MenuItem subItem = new MenuItem(submenu, SWT.PUSH); subItem.addListener(SWT.Selection, e -> System.out.println("Select All")); subItem.setText("Select &All\tCtrl+A"); subItem.setAccelerator(SWT.MOD1 + 'A'); subItem.setImage(eclipse); // CTabFolder CTabFolder folder = new CTabFolder(shell, SWT.BORDER); for (int i = 0; i < 2; i++) { CTabItem cTabItem = new CTabItem(folder, i % 2 == 0 ? SWT.CLOSE : SWT.NONE); cTabItem.setText("Item " + i); Text textMsg = new Text(folder, SWT.MULTI); textMsg.setText("Content for Item " + i); cTabItem.setControl(textMsg); cTabItem.setImage((i % 2 == 1) ? eclipseCTab1 : eclipseCTab2); } // PerMonitorV2 setting // Label label = new Label (shell, SWT.BORDER); // label.setText("PerMonitorV2 value before:after:Error"); // Text text = new Text(shell, SWT.BORDER); // text.setText(DPIUtil.BEFORE + ":" + DPIUtil.AFTER + ":" + DPIUtil.RESULT); // Composite for Label, Button, Tool-bar Composite composite = new Composite(shell, SWT.BORDER); composite.setLayout(new RowLayout(SWT.HORIZONTAL)); // Label with Image Label label1 = new Label(composite, SWT.BORDER); label1.setImage(eclipse); // Label with text only Label label2 = new Label(composite, SWT.BORDER); label2.setText("No Image"); // Button with text + Old Image Constructor Button oldButton1 = new Button(composite, SWT.PUSH); oldButton1.setText("Old Img"); oldButton1.setImage(new Image(display, IMAGE_PATH_100)); // Button with Old Image Constructor // Button oldButton2 = new Button(composite, SWT.PUSH); // oldButton2.setImage(new Image(display, filenameProvider.getImagePath(100))); // Button with Image Button createDialog = new Button(composite, SWT.PUSH); createDialog.setText("Child Dialog"); createDialog.setImage(eclipse); createDialog.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent event) { final Shell dialog = new Shell(shell, SWT.DIALOG_TRIM | SWT.RESIZE); dialog.setText("Child Dialog"); RowLayout rowLayout = new RowLayout(SWT.VERTICAL); dialog.setLayout(rowLayout); Label label = new Label(dialog, SWT.BORDER); label.setImage(eclipse); Point location = shell.getLocation(); dialog.setLocation(location.x + 250, location.y + 50); dialog.pack(); dialog.open(); } }); // Toolbar with Image ToolBar toolBar = new ToolBar(composite, SWT.FLAT | SWT.BORDER); Rectangle clientArea = shell.getClientArea(); toolBar.setLocation(clientArea.x, clientArea.y); for (int i = 0; i < 2; i++) { int style = i % 2 == 1 ? SWT.DROP_DOWN : SWT.PUSH; ToolItem toolItem = new ToolItem(toolBar, style); toolItem.setImage((i % 2 == 0) ? eclipseToolBar1 : eclipseToolBar2); toolItem.setEnabled(i % 2 == 0); } toolBar.pack(); Button button = new Button(shell, SWT.PUSH); button.setText("Refresh-Current Monitor : Zoom"); Text text1 = new Text(shell, SWT.BORDER); Monitor monitor = button.getMonitor(); text1.setText("" + monitor.getZoom()); button.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { Monitor monitor = button.getMonitor(); text1.setText("" + monitor.getZoom()); } }); Button button2 = new Button(shell, SWT.PUSH); button2.setText("Refresh-Both Monitors : Zoom"); Text text2 = new Text(shell, SWT.BORDER); Monitor[] monitors = display.getMonitors(); StringBuilder text2String = new StringBuilder(); for (int i = 0; i < monitors.length; i++) { text2String.append(monitors[i].getZoom() + (i < (monitors.length - 1) ? " - " : "")); } text2.setText(text2String.toString()); button2.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { Monitor[] monitors = display.getMonitors(); StringBuilder text2String = new StringBuilder(); for (int i = 0; i < monitors.length; i++) { text2String.append(monitors[i].getZoom() + (i < (monitors.length - 1) ? " - " : "")); } text2.setText(text2String.toString()); } }); // Table Table table = new Table(shell, SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION); table.setLinesVisible(true); table.setHeaderVisible(true); String titles[] = { "Title 1" }; for (int i = 0; i < titles.length; i++) { TableColumn column = new TableColumn(table, SWT.NONE); column.setText(titles[i]); column.setImage(eclipseTableHeader); } for (int i = 0; i < 1; i++) { TableItem item = new TableItem(table, SWT.NONE); item.setText(0, "Data " + i); item.setImage(0, eclipseTableItem); } for (int i = 0; i < titles.length; i++) { table.getColumn(i).pack(); } // Tree final Tree tree = new Tree(shell, SWT.BORDER); for (int i = 0; i < 1; i++) { TreeItem iItem = new TreeItem(tree, 0); iItem.setText("TreeItem (0) -" + i); iItem.setImage(eclipseTree1); TreeItem jItem = null; for (int j = 0; j < 1; j++) { jItem = new TreeItem(iItem, 0); jItem.setText("TreeItem (1) -" + j); jItem.setImage(eclipseTree2); jItem.setExpanded(true); } tree.select(jItem); } // Shell Location Monitor primary = display.getPrimaryMonitor(); Rectangle bounds = primary.getBounds(); Rectangle rect = shell.getBounds(); int x = bounds.x + (bounds.width - rect.width) / 2; int y = bounds.y + (bounds.height - rect.height) / 2; shell.setLocation(x, y); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } }