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| package test;
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.ItemEvent;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
public class Main extends JPanel {
public enum DrawMethod {
NO_CLIP,
CLIP,
CLIP_SHAPE,
SRC_IN_HARD,
MASK_HARD,
SRC_IN_SOFT,
MASK_SOFT;
}
private static final Color TRANSPARENT_COLOR = new Color(0, 0, 0, 0);
private final BufferedImage image;
private final Shape clip;
private final Color hardMask = Color.BLACK;
private final RadialGradientPaint softMask = new RadialGradientPaint(150, 150, 150, new float[]{0, 0.5f, 1}, new Color[]{Color.BLACK, Color.BLACK, TRANSPARENT_COLOR});
public Main() throws IOException {
super();
setDrawMethod(DrawMethod.CLIP);
addPropertyChangeListener("drawMethod", propertyChangeEvent -> {
buffer = null;
repaint();
});
setAntialias(true);
addPropertyChangeListener("antialias", propertyChangeEvent -> {
buffer = null;
repaint();
});
image = ImageIO.read(getClass().getResource("ME0000867589_2.jpg"));
clip = new Ellipse2D.Float(0, 0, 300, 300);
}
@Override
protected void paintComponent(final Graphics g) {
super.paintComponent(g);
final Graphics2D g2d = (Graphics2D) g.create();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, getAntialias() ? RenderingHints.VALUE_ANTIALIAS_ON : RenderingHints.VALUE_ANTIALIAS_OFF);
try {
final DrawMethod drawMethod = getDrawMethod();
switch (drawMethod) {
case CLIP: {
g2d.setClip(clip);
drawContent(g2d);
}
break;
case CLIP_SHAPE: {
g2d.setPaint(hardMask);
g2d.fill(clip);
}
break;
case SRC_IN_HARD:
case SRC_IN_SOFT: {
final Graphics2D gtemp = initializeBuffer();
initializeMask(gtemp, drawMethod);
gtemp.setComposite(AlphaComposite.SrcIn);
drawContent(gtemp);
gtemp.dispose();
drawBuffer(g2d);
}
break;
case MASK_HARD:
case MASK_SOFT: {
final Graphics2D gtemp = initializeBuffer();
initializeMask(gtemp, drawMethod);
gtemp.setComposite(AlphaComposite.SrcIn);
gtemp.dispose();
drawBuffer(g2d);
}
break;
case NO_CLIP:
default: {
drawContent(g2d);
}
}
} finally {
g2d.dispose();
}
}
private BufferedImage buffer;
private void drawContent(Graphics2D g2d) {
g2d.drawImage(image, 0, 0, null);
}
private void drawBuffer(Graphics2D g2d) {
g2d.drawImage(buffer, 0, 0, null);
}
private Graphics2D initializeBuffer() {
if (buffer == null) {
buffer = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_ARGB);
}
final Graphics2D g2d = buffer.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, getAntialias() ? RenderingHints.VALUE_ANTIALIAS_ON : RenderingHints.VALUE_ANTIALIAS_OFF);
g2d.setColor(TRANSPARENT_COLOR);
g2d.fillRect(0, 0, image.getWidth(), image.getHeight());
return g2d;
}
private void initializeMask(Graphics2D g2d, DrawMethod drawMethod) {
final Paint paint = (drawMethod == DrawMethod.SRC_IN_HARD || drawMethod == DrawMethod.MASK_HARD) ? hardMask : softMask;
g2d.setPaint(paint);
g2d.fill(clip);
}
////////////////////////////////////////////////////////////////////////////
public final void setDrawMethod(final DrawMethod value) {
putClientProperty("drawMethod", value);
}
public final DrawMethod getDrawMethod() {
return (DrawMethod) getClientProperty("drawMethod");
}
public final void setAntialias(final boolean value) {
putClientProperty("antialias", value);
}
public final boolean getAntialias() {
return (Boolean) getClientProperty("antialias");
}
////////////////////////////////////////////////////////////////////////////
public static void main(String[] args) {
SwingUtilities.invokeLater(Main::createUI);
}
private static void createUI() {
try {
final Main main = new Main();
final JComboBox combo = new JComboBox(DrawMethod.values());
combo.setSelectedItem(main.getDrawMethod());
combo.addItemListener(itemEvent -> {
switch (itemEvent.getStateChange()) {
case ItemEvent.SELECTED:
final DrawMethod drawMethod = (DrawMethod) combo.getSelectedItem();
main.setDrawMethod(drawMethod);
break;
default:
}
});
final JCheckBox checkBox = new JCheckBox("Antialiasing");
checkBox.setSelected(main.getAntialias());
checkBox.addChangeListener(changeEvent -> {
main.setAntialias(checkBox.isSelected());
});
final JToolBar toolBar = new JToolBar();
toolBar.add(combo);
toolBar.add(checkBox);
toolBar.setFloatable(false);
final JFrame jframe = new JFrame("Test");
jframe.setLayout(new BorderLayout());
jframe.add(main, BorderLayout.CENTER);
jframe.add(toolBar, BorderLayout.NORTH);
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jframe.setSize(500, 500);
jframe.setVisible(true);
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
}
} |
Peindre qu'une partie de ce qui est normallement dessiné dans un composant
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