我怎样才能让一个的Java Swing动画更流畅(How can I make a Java Swi

2019-07-22 01:20发布

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我创建Java中的动画幻灯片过渡，这是我目前的模型的MacBook Pro和我岁的iMac震荡，在Java 6，7和8。

我能做些什么，使这个动画看起来更平滑在Mac OS X用户？ 

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class ScratchSpace {

    public static void main(String[] args) {
        AnimatedPanel panel = new AnimatedPanel();

        JFrame frame = new JFrame();
        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, 600));
            setOpaque(true);
        }

        public void animate() {
            final int animationTime = 1000;
            int framesPerSecond = 30;
            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
        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());
        }
    }
}

Answer 1:

这在很大程度上取决于它是什么，你最终想要达到的。

请记住，动画是运动的错觉...

我变了

  • 在framesPerSecond到60 ，这似乎已经帮助。
  • 减少了可打印区域的整体高度
  • 计算的改变和简单的叫的区域repaint(Rectangle)传递仅改变了该区域。

另一个问题是你的动画有一个大面积的时间很短的时间覆盖。 增加的时间量也将使其更平滑（或减少的宽度和/或高度） 

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，你可以生成你自己的备份缓冲区和更新... 

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());
        }
    }
}

你拥有的主要问题基本上是你想画的面积是很大的，你要画它的时间。

另一个或者

您可以创建一个BufferedImage表示进度条和移动的最新进展。 此更新将创建一个兼容的缓冲图像，这将使我们更快地向渲染 

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);
        }
    }
}


文章来源: How can I make a Java Swing animation smoother
标签： java swing animation
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