/*******************************************************************************
* 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 ();
}
}
}