| /******************************************************************************* |
| * Copyright (c) 2015, 2016 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| /** |
| * Snippet to test the use of the DPI-aware Image constructors. |
| * Work in progress in https://bugs.eclipse.org/399786 |
| * <p> |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| */ |
| public class Snippet367 { |
| 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; |
| |
| public static void main (String [] args) { |
| final ImageFileNameProvider filenameProvider = zoom -> { |
| switch (zoom) { |
| case 150: |
| return IMAGE_PATH_150; |
| case 200: |
| return IMAGE_PATH_200; |
| default: |
| return IMAGE_PATH_100; |
| } |
| }; |
| final ImageDataProvider imageDataProvider = zoom -> { |
| switch (zoom) { |
| case 150: |
| return new ImageData (IMAGE_PATH_150); |
| case 200: |
| return new ImageData (IMAGE_PATH_200); |
| default: |
| return new ImageData (IMAGE_PATH_100); |
| } |
| }; |
| |
| final Display display = new Display (); |
| final Shell shell = new Shell (display); |
| shell.setText("Snippet367"); |
| shell.setLayout (new GridLayout (3, false)); |
| |
| Menu menuBar = new Menu(shell, SWT.BAR); |
| shell.setMenuBar(menuBar); |
| MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE); |
| fileItem.setText("&File"); |
| Menu fileMenu = new Menu(menuBar); |
| fileItem.setMenu(fileMenu); |
| MenuItem exitItem = new MenuItem(fileMenu, SWT.PUSH); |
| exitItem.setText("&Exit"); |
| exitItem.addListener(SWT.Selection, e -> shell.close()); |
| |
| new Label (shell, SWT.NONE).setText (IMAGE_200 + ":"); |
| new Label (shell, SWT.NONE).setImage (new Image (display, IMAGE_PATH_200)); |
| new Button(shell, SWT.PUSH).setImage (new Image (display, IMAGE_PATH_200)); |
| |
| new Label (shell, SWT.NONE).setText (IMAGE_150 + ":"); |
| new Label (shell, SWT.NONE).setImage (new Image (display, IMAGE_PATH_150)); |
| new Button(shell, SWT.NONE).setImage (new Image (display, IMAGE_PATH_150)); |
| |
| new Label (shell, SWT.NONE).setText (IMAGE_100 + ":"); |
| new Label (shell, SWT.NONE).setImage (new Image (display, IMAGE_PATH_100)); |
| new Button(shell, SWT.NONE).setImage (new Image (display, IMAGE_PATH_100)); |
| |
| createSeparator(shell); |
| |
| new Label (shell, SWT.NONE).setText ("ImageFileNameProvider:"); |
| new Label (shell, SWT.NONE).setImage (new Image (display, filenameProvider)); |
| new Button(shell, SWT.NONE).setImage (new Image (display, filenameProvider)); |
| |
| new Label (shell, SWT.NONE).setText ("ImageDataProvider:"); |
| new Label (shell, SWT.NONE).setImage (new Image (display, imageDataProvider)); |
| new Button(shell, SWT.NONE).setImage (new Image (display, imageDataProvider)); |
| |
| createSeparator(shell); |
| |
| new Label (shell, SWT.NONE).setText ("1. Canvas\n(PaintListener)"); |
| final Point size = new Point (550, 40); |
| final Canvas canvas = new Canvas (shell, SWT.NONE); |
| canvas.addPaintListener (e -> { |
| Point size1 = canvas.getSize (); |
| paintImage (e.gc, size1); |
| }); |
| GridData gridData = new GridData (size.x, size.y); |
| gridData.horizontalSpan = 2; |
| canvas.setLayoutData (gridData); |
| |
| createSeparator(shell); |
| |
| new Label (shell, SWT.NONE).setText ("2. Painted image\n (default resolution)"); |
| Image image = new Image (display, size.x, size.y); |
| GC gc = new GC (image); |
| try { |
| paintImage (gc, size); |
| } finally { |
| gc.dispose (); |
| } |
| Label imageLabel = new Label (shell, SWT.NONE); |
| imageLabel.setImage (image); |
| imageLabel.setLayoutData (new GridData (SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1)); |
| |
| createSeparator(shell); |
| |
| new Label (shell, SWT.NONE).setText ("3. Painted image\n(multi-res, unzoomed paint)"); |
| imageLabel = new Label (shell, SWT.NONE); |
| imageLabel.setImage (new Image (display, (ImageDataProvider) zoom -> { |
| Image temp = new Image (display, size.x * zoom / 100, size.y * zoom / 100); |
| GC gc1 = new GC (temp); |
| try { |
| paintImage (gc1, size); |
| return temp.getImageData (); |
| } finally { |
| gc1.dispose (); |
| temp.dispose (); |
| } |
| })); |
| imageLabel.setLayoutData (new GridData (SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1)); |
| |
| createSeparator(shell); |
| |
| new Label (shell, SWT.NONE).setText ("4. Painted image\n(multi-res, zoomed paint)"); |
| imageLabel = new Label (shell, SWT.NONE); |
| imageLabel.setImage (new Image (display, (ImageDataProvider) zoom -> { |
| Image temp = new Image (display, size.x * zoom / 100, size.y * zoom / 100); |
| GC gc1 = new GC (temp); |
| try { |
| paintImage2 (gc1, new Point (size.x * zoom / 100, size.y * zoom / 100), zoom / 100); |
| return temp.getImageData (); |
| } finally { |
| gc1.dispose (); |
| temp.dispose (); |
| } |
| })); |
| imageLabel.setLayoutData (new GridData (SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1)); |
| |
| createSeparator(shell); |
| |
| new Label (shell, SWT.NONE).setText ("5. 50x50 box\n(Display#getDPI(): " + display.getDPI().x + ")"); |
| Label box= new Label (shell, SWT.NONE); |
| box.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_DARK_SHADOW)); |
| box.setLayoutData (new GridData (50, 50)); |
| |
| shell.pack (); |
| shell.open (); |
| while (!shell.isDisposed ()) { |
| if (!display.readAndDispatch ()) display.sleep (); |
| } |
| display.dispose (); |
| } |
| |
| private static void createSeparator(Composite shell) { |
| new Label (shell, SWT.SEPARATOR | SWT.HORIZONTAL).setLayoutData (new GridData (SWT.FILL, SWT.FILL, true, false, 3, 1)); |
| } |
| |
| private static void paintImage (GC gc, Point size) { |
| gc.setBackground (gc.getDevice ().getSystemColor (SWT.COLOR_WIDGET_BACKGROUND)); |
| gc.fillRectangle (0, 0, size.x, size.y); |
| |
| gc.setBackground (gc.getDevice ().getSystemColor (SWT.COLOR_LIST_SELECTION)); |
| gc.fillRoundRectangle (0, 0, size.x - 1, size.y - 1, 10, 10); |
| |
| gc.setBackground (gc.getDevice ().getSystemColor (SWT.COLOR_WIDGET_BACKGROUND)); |
| gc.drawRoundRectangle (0, 0, size.x - 1, size.y - 1, 10, 10); |
| gc.drawText (gc.getFont ().getFontData ()[0].toString (), 10, 10, true); |
| } |
| |
| private static void paintImage2 (GC gc, Point size, int f) { |
| gc.setBackground (gc.getDevice ().getSystemColor (SWT.COLOR_WIDGET_BACKGROUND)); |
| gc.fillRectangle (0, 0, size.x, size.y); |
| |
| // Scale line width, corner roundness, and font size. |
| // Caveat: line width expands in all directions, so the origin also has to move. |
| |
| gc.setBackground (gc.getDevice ().getSystemColor (SWT.COLOR_LIST_SELECTION)); |
| gc.fillRoundRectangle (f/2, f/2, size.x - f, size.y - f, 10*f, 10*f); |
| |
| gc.setBackground (gc.getDevice ().getSystemColor (SWT.COLOR_WIDGET_BACKGROUND)); |
| gc.setLineWidth (f); |
| gc.drawRoundRectangle (f/2, f/2, size.x - f, size.y - f, 10*f, 10*f); |
| FontData fontData = gc.getFont ().getFontData ()[0]; |
| fontData.setHeight (fontData.getHeight ()*f); |
| Font font = new Font (gc.getDevice (), fontData); |
| try { |
| gc.setFont (font); |
| gc.drawText (fontData.toString (), 10*f, 10*f, true); |
| } finally { |
| font.dispose (); |
| } |
| } |
| } |