в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

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2010-05-31T15:18:17Z

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== GC Transform ==



<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2005 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
*******************************************************************************/
/*
* Drawing with transformations, paths and alpha blending
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.1
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Path;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.Transform;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class TransformationDrawing {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
FontData fd = shell.getFont().getFontData()[0];
final Font font = new Font(display, fd.getName(), 60, SWT.BOLD | SWT.ITALIC);
final Image image = new Image(display, 640, 480);
final Rectangle rect = image.getBounds();
GC gc = new GC(image);
gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
gc.fillOval(rect.x, rect.y, rect.width, rect.height);
gc.dispose();
shell.addListener(SWT.Paint, new Listener() {
public void handleEvent(Event event) {
GC gc = event.gc;
Transform tr = new Transform(display);
tr.translate(50, 120);
tr.rotate(-30);
gc.drawImage(image, 0, 0, rect.width, rect.height, 0, 0, rect.width / 2, rect.height / 2);
gc.setAlpha(100);
gc.setTransform(tr);
Path path = new Path(display);
path.addString("SWT", 0, 0, font);
gc.setBackground(display.getSystemColor(SWT.COLOR_GREEN));
gc.setForeground(display.getSystemColor(SWT.COLOR_BLUE));
gc.fillPath(path);
gc.drawPath(path);
tr.dispose();
path.dispose();
}
});
shell.setSize(shell.ruputeSize(rect.width / 2, rect.height / 2));
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
image.dispose();
font.dispose();
display.dispose();
}
}</source>



== Rotate by 45 degrees ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.Transform;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class Rotate45Degrees {
public static void main(String[] args) {
final Display display = new Display();
final Image image = new Image(display, 110, 60);
GC gc = new GC(image);
Font font = new Font(display, "Times", 30, SWT.BOLD);
gc.setFont(font);
gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
gc.fillRectangle(0, 0, 110, 60);
gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
gc.drawText("SWT", 10, 10, true);
font.dispose();
gc.dispose();
final Rectangle rect = image.getBounds();
Shell shell = new Shell(display);
shell.setText("Matrix Tranformations");
shell.setLayout(new FillLayout());
final Canvas canvas = new Canvas(shell, SWT.DOUBLE_BUFFERED);
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
GC gc = e.gc;
gc.setAdvanced(true);
if (!gc.getAdvanced()) {
gc.drawText("Advanced graphics not supported", 30, 30, true);
return;
}
// Original image
int x = 30, y = 30;
gc.drawImage(image, x, y);
x += rect.width + 30;
Transform transform = new Transform(display);
// Rotate by 45 degrees
//float cos45 = (float)Math.cos(45);
float cos45 = (float)Math.cos(Math.PI/4);

//float sin45 = (float)Math.sin(45);
float sin45 = (float)Math.sin(Math.PI/4);

transform.setElements(cos45, sin45, -sin45, cos45, 0, 0);
gc.setTransform(transform);
gc.drawImage(image, 350, 100);

transform.dispose();
}
});
shell.setSize(350, 550);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
image.dispose();
display.dispose();
}
}</source>



== Shear in the x/y-direction ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.Transform;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class SheerXYDirection {
public static void main(String[] args) {
final Display display = new Display();
final Image image = new Image(display, 110, 60);
GC gc = new GC(image);
Font font = new Font(display, "Times", 30, SWT.BOLD);
gc.setFont(font);
gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
gc.fillRectangle(0, 0, 110, 60);
gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
gc.drawText("SWT", 10, 10, true);
font.dispose();
gc.dispose();
final Rectangle rect = image.getBounds();
Shell shell = new Shell(display);
shell.setText("Matrix Tranformations");
shell.setLayout(new FillLayout());
final Canvas canvas = new Canvas(shell, SWT.DOUBLE_BUFFERED);
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
GC gc = e.gc;
gc.setAdvanced(true);
if (!gc.getAdvanced()) {
gc.drawText("Advanced graphics not supported", 30, 30, true);
return;
}
// Original image
int x = 30, y = 30;
gc.drawImage(image, x, y);
x += rect.width + 30;
Transform transform = new Transform(display);
// Shear in the x-direction
transform.setElements(1, 0, -1, 1, 0, 0);
gc.setTransform(transform);
gc.drawImage(image, 300, y);

// Shear in y-direction
transform.setElements(1, -1, 0, 1, 0, 0);
gc.setTransform(transform);
gc.drawImage(image, 150, 475);
transform.dispose();
}
});
shell.setSize(350, 550);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
image.dispose();
display.dispose();
}
}</source>



== Transform: Reflect around the x/y axis. ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.Transform;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class TransformReflectionXYAxis {
public static void main(String[] args) {
final Display display = new Display();
final Image image = new Image(display, 110, 60);
GC gc = new GC(image);
Font font = new Font(display, "Times", 30, SWT.BOLD);
gc.setFont(font);
gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
gc.fillRectangle(0, 0, 110, 60);
gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
gc.drawText("SWT", 10, 10, true);
font.dispose();
gc.dispose();
final Rectangle rect = image.getBounds();
Shell shell = new Shell(display);
shell.setText("Matrix Tranformations");
shell.setLayout(new FillLayout());
final Canvas canvas = new Canvas(shell, SWT.DOUBLE_BUFFERED);
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
GC gc = e.gc;
gc.setAdvanced(true);
if (!gc.getAdvanced()) {
gc.drawText("Advanced graphics not supported", 30, 30, true);
return;
}
// Original image
int x = 30, y = 30;
gc.drawImage(image, x, y);
x += rect.width + 30;
Transform transform = new Transform(display);
// Reflect around the y axis.
transform.setElements(-1, 0, 0, 1, 0, 0);
gc.setTransform(transform);
gc.drawImage(image, -1 * x - rect.width, y);
x = 30;
y += rect.height + 30;
// Reflect around the x axis.
transform.setElements(1, 0, 0, -1, 0, 0);
gc.setTransform(transform);
gc.drawImage(image, x, -1 * y - rect.height);
transform.dispose();
}
});
shell.setSize(350, 550);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
image.dispose();
display.dispose();
}
}</source>

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в 17:44, 31 мая 2010

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