Molto dipende da cosa si vuole raggiungere.
Ricordate, l'animazione è l'illusione del movimento ...
ho cambiato
- il
framesPerSecond
-60
che sembra aver aiutato.
- Ridotto l'altezza complessiva dell'area di stampa
- Calcolato l'area di modifica e semplice chiamato
repaint(Rectangle)
passando solo in quell'area che è stata modificata.
L'altro problema è che l'animazione ha una vasta area da coprire in un periodo di tempo molto breve. Aumentando la quantità di tempo anche renderlo più morbido (o ridurre la larghezza e/o altezza)
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ScratchSpace {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
AnimatedPanel panel = new AnimatedPanel();
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
panel.animate();
}
});
}
public static class AnimatedPanel extends JPanel {
private float progress = 0.0f; // a number between 0.0 and 1.0
public AnimatedPanel() {
setPreferredSize(new Dimension(800, 100));
}
public void animate() {
final int animationTime = 1000;
int framesPerSecond = 60;
int delay = 1000/framesPerSecond;
final long start = System.currentTimeMillis();
final Timer timer = new Timer(delay, null);
timer.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
final long now = System.currentTimeMillis();
final long elapsed = now - start;
int width = getWidth();
int height = getHeight();
int oldWidth = (int) (width * progress);
progress = (float) elapsed/animationTime;
int newWidth = (int) (width * progress);
repaint(new Rectangle(oldWidth, 0, newWidth - oldWidth, height));
if (elapsed >= animationTime) {
timer.stop();
}
}
});
timer.start();
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
int width = getWidth();
int progressWidth = (int) (width * progress);
g2d.setColor(Color.BLUE);
g2d.fillRect(0, 0, progressWidth, getHeight());
g2d.setColor(Color.RED);
g2d.fillRect(progressWidth, 0, width - progressWidth, getHeight());
}
}
}
Alternativly, si potrebbe generare ti propria backup buffer e aggiornarlo ...
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ScratchSpace {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
AnimatedPanel panel = new AnimatedPanel();
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
panel.animate();
}
});
}
public static class AnimatedPanel extends JPanel {
private float progress = 0.0f; // a number between 0.0 and 1.0
private BufferedImage buffer;
public AnimatedPanel() {
setPreferredSize(new Dimension(800, 600));
// setOpaque(true);
}
public void animate() {
final int animationTime = 1000;
int framesPerSecond = 60;
int delay = 1000/framesPerSecond;
final long start = System.currentTimeMillis();
final Timer timer = new Timer(delay, null);
timer.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
final long now = System.currentTimeMillis();
final long elapsed = now - start;
int width = getWidth();
progress = (float) elapsed/animationTime;
updateBuffer();
repaint();
if (elapsed >= animationTime) {
timer.stop();
}
}
});
timer.start();
}
@Override
public void invalidate() {
buffer = null;
updateBuffer();
super.invalidate();
}
protected void updateBuffer() {
if (getWidth() > 0 && getHeight() > 0) {
if (buffer == null) {
buffer = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);
}
Graphics2D g2d = buffer.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
int width = getWidth();
int height = getHeight();
float progressWidth = width * progress;
g2d.setColor(Color.BLUE);
g2d.fill(new Rectangle2D.Float(0, 0, progressWidth, height));
g2d.setColor(Color.RED);
g2d.fill(new Rectangle2D.Float(progressWidth, 0, width - progressWidth, height));
g2d.dispose();
}
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
if (buffer != null) {
g2d.drawImage(buffer, 0, 0, this);
}
// int width = getWidth();
// int progressWidth = (int) (width * progress);
// g2d.setColor(Color.BLUE);
// g2d.fillRect(0, 0, progressWidth, getHeight());
// g2d.setColor(Color.RED);
// g2d.fillRect(progressWidth, 0, width - progressWidth, getHeight());
}
}
}
L' il problema principale che hai è in sostanza l'area che stai cercando di dipingere è troppo grande per il tempo in cui vuoi dipingerlo.
Un'altra alternativa
si potrebbe creare una BufferedImage
che rappresenta la barra di avanzamento e muoversi come gli aggiornamenti sullo stato di avanzamento. Questo aggiornamento crea un'immagine compatibile tamponata, che dovrebbe renderlo più veloce al renderer
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.RenderingHints;
import java.awt.Transparency;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ScratchSpace {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
AnimatedPanel panel = new AnimatedPanel();
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
panel.animate();
}
});
}
public static class AnimatedPanel extends JPanel {
private float progress = 0.0f; // a number between 0.0 and 1.0
private BufferedImage buffer;
public AnimatedPanel() {
setPreferredSize(new Dimension(800, 600));
// setOpaque(true);
}
public void animate() {
final int animationTime = 1000;
int framesPerSecond = 60;
int delay = 1000/framesPerSecond;
final long start = System.currentTimeMillis();
final Timer timer = new Timer(delay, null);
timer.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
final long now = System.currentTimeMillis();
final long elapsed = now - start;
progress = (float) elapsed/animationTime;
repaint();
if (elapsed >= animationTime) {
timer.stop();
}
}
});
timer.start();
}
@Override
public void invalidate() {
buffer = null;
updateBuffer();
super.invalidate();
}
protected void updateBuffer() {
if (getWidth() > 0 && getHeight() > 0) {
if (buffer == null) {
GraphicsConfiguration config = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
buffer = config.createCompatibleImage(getWidth(), getHeight(), Transparency.TRANSLUCENT);
buffer.coerceData(true);
Graphics2D g2d = buffer.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
int width = getWidth();
int height = getHeight();
g2d.setColor(Color.BLUE);
g2d.fill(new Rectangle2D.Float(0, 0, width, height));
g2d.dispose();
}
}
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
int width = getWidth();
int progressWidth = (int) (width * progress);
int x = (progressWidth - width);
System.out.println(progressWidth + "; " + x);
// g2d.setColor(Color.BLUE);
// g2d.fillRect(0, 0, progressWidth, getHeight());
g2d.setColor(Color.RED);
g2d.fillRect(progressWidth, 0, width - progressWidth, getHeight());
g2d.drawImage(buffer, x, 0, this);
}
}
}
Il valore per isDoubleBuffered() nella JPanel è vero –
1) Utilizzare un BufferedImage per l'immagine di sfondo. 2) Limita quanto ridicherai usando un sovraccarico '' repaint (...) 'che ridipinge solo un'area limitata della GUI, quanto basta per i tuoi scopi. 3) Gioca con il tuo frame rate per vedere cosa funziona meglio. 4) Sperimenta con la libreria di animazione/GUI non Swing come Slick che può essere meglio ottimizzata per l'animazione. –
Riduci le dimensioni dell'area che stai pitturando – MadProgrammer