Java 重新喷漆,但不重新喷漆每个组件
我有一个包含jframe的应用程序,这个jframe然后添加一个包含图像的jpanel。jpanel将在给定的时间内显示,然后从jframe中删除并添加另一个jpanel 我想在图像之间淡入淡出,我是用定时器完成的Java 重新喷漆,但不重新喷漆每个组件,java,swing,Java,Swing,我有一个包含jframe的应用程序,这个jframe然后添加一个包含图像的jpanel。jpanel将在给定的时间内显示,然后从jframe中删除并添加另一个jpanel 我想在图像之间淡入淡出,我是用定时器完成的 private void fadeOut() { ActionListener fadeOutAc = new ActionListener() { @Override public void actionPerformed(ActionEve
private void fadeOut() {
ActionListener fadeOutAc = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
opacity += 10;
if (opacity >= 255) {
opacity = 255;
fadeOutT.stop();
}
repaint();
}
};
fadeOutT = new Timer(20, fadeOutAc);
fadeOutT.start();
}
private void fadeIn() {
ActionListener fadeInAc = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
opacity -= 10;
if (opacity <= 0) {
opacity = 0;
fadeInT.stop();
}
repaint();
}
};
fadeInT = new Timer(10, fadeInAc);
fadeInT.setInitialDelay(200);
fadeInT.start();
}
public void paint(Graphics g) {
super.paintComponent(g);
g.setColor(new Color(picColor.getRed(), picColor.getGreen(), picColor.getBlue(), opacity));
g.fillRect(0, 0, presWin.getWidth(), presWin.getHeight());
}
private void fadeOut(){
ActionListener fadeOutAc=新建ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
不透明度+=10;
如果(不透明度>=255){
不透明度=255;
fadeout.stop();
}
重新油漆();
}
};
淡出=新定时器(20,淡出);
fadeout.start();
}
私人空间{
ActionListener fadeInAc=新建ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
不透明度-=10;
如果(不透明度完全正常,将函数移动到JFrame
并调用repaint
函数实际上会调用JFrame的repaint
我认为最好的解决方案是将panel作为参数传递给fadeIn
和fadeOut
函数,并调用其repaint
方法,例如fadeIn:
private void fadeIn(JPanel panelParam) {
ActionListener fadeInAc = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
opacity -= 10;
if (opacity <= 0) {
opacity = 0;
fadeInT.stop();
}
panelParam.repaint(); // here call repaint of the panel.
}
};
fadeInT = new Timer(10, fadeInAc);
fadeInT.setInitialDelay(200);
fadeInT.start();
}
private void fadeIn(JPanel panelParam){
ActionListener fadeInAc=新建ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
不透明度-=10;
如果(不透明度对我来说,当你似乎想要的是一个可以淡入淡出内容的容器时,将功能放在JFrame
中似乎有点愚蠢。这样你就可以将责任隔离到一个容器/类上,这个容器/类可以以你想要的任何方式放置或使用到UI的其余部分
基本上,此示例使用FadingPane
(基于JPanel
)来控制淡入过程,但我将JLabel
放在其上,它保存实际图像
淡入淡出通过使用AlphaComposite来控制,这意味着该面板实际上会淡入淡出,而不仅仅是改变填充颜色;)
还有一个FadingListener
,它提供有关淡入过程的附加通知,真正感兴趣的是fadeoutdicomplete
,因此您可以切换图像并将面板淡入,但您永远不知道
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JLabel label;
private FadingPane fadingPane;
private File[] pictures;
private int index;
public TestPane() {
// Just for show
setBackground(Color.RED);
fadingPane = new FadingPane(new FadeListener() {
@Override
public void fadeDidStart(FadingPane panel) {
}
@Override
public void fadeDidStop(FadingPane panel) {
}
@Override
public void fadeOutDidComplete(FadingPane panel) {
nextPicture();
fadingPane.fadeIn();
}
@Override
public void fadeInDidComplete(FadingPane panel) {
}
});
setLayout(new BorderLayout());
fadingPane.setLayout(new BorderLayout());
label = new JLabel();
fadingPane.add(label);
add(fadingPane);
JButton next = new JButton("Next");
add(next, BorderLayout.SOUTH);
next.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
fadingPane.fadeOut();
}
});
pictures = new File("/Volumes/Disk02/Dropbox/MegaTokyo/thumnails").listFiles(new FileFilter() {
@Override
public boolean accept(File pathname) {
String name = pathname.getName().toLowerCase();
return name.endsWith(".jpg") || name.endsWith(".png");
}
});
nextPicture();
}
protected void nextPicture() {
index++;
if (index >= pictures.length) {
index = 0;
}
try {
BufferedImage img = ImageIO.read(pictures[index]);
label.setIcon(new ImageIcon(img));
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
public interface FadeListener {
public void fadeDidStart(FadingPane panel);
public void fadeDidStop(FadingPane panel);
public void fadeOutDidComplete(FadingPane panel);
public void fadeInDidComplete(FadingPane panel);
}
public class FadingPane extends JPanel {
private float delta;
private float alpha = 1f;
private Timer timer;
private FadeListener fadeListener;
public FadingPane(FadeListener fadeListener) {
this.fadeListener = fadeListener;
// This is important, as we may not always be opaque
// and we don't want to stuff up the painting process
setOpaque(false);
timer = new Timer(40, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
float alpha = getAlpha() + delta;
if (alpha < 0.001f) {
alpha = 0f;
timer.stop();
fadeListener.fadeOutDidComplete(FadingPane.this);
} else if (alpha >= 1.0f) {
alpha = 1.0f;
timer.stop();
fadeListener.fadeInDidComplete(FadingPane.this);
}
setAlpha(alpha);
}
});
}
public float getAlpha() {
return alpha;
}
public void setAlpha(float value) {
if (alpha != value) {
this.alpha = Math.min(1.0f, Math.max(0.0f, value));
repaint();
}
}
@Override
public void paint(Graphics g) {
// I don't normally recomamned overriding paint, but in this case,
// I want to affect EVERYTHING that might be added to this panel
Graphics2D g2d = (Graphics2D) g.create();
g2d.setComposite(AlphaComposite.SrcOver.derive(getAlpha()));
super.paint(g2d);
g2d.dispose();
}
public void fadeIn() {
timer.stop();
fadeListener.fadeDidStop(FadingPane.this);
delta = 0.05f;
timer.restart();
fadeListener.fadeDidStart(FadingPane.this);
}
public void fadeOut() {
timer.stop();
fadeListener.fadeDidStop(FadingPane.this);
delta = -0.05f;
timer.restart();
fadeListener.fadeDidStart(FadingPane.this);
}
}
}
导入java.awt.AlphaComposite;
导入java.awt.BorderLayout;
导入java.awt.Color;
导入java.awt.EventQueue;
导入java.awt.Graphics;
导入java.awt.Graphics2D;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.awt.image.buffereImage;
导入java.io.File;
导入java.io.FileFilter;
导入java.io.IOException;
导入javax.imageio.imageio;
导入javax.swing.ImageIcon;
导入javax.swing.JButton;
导入javax.swing.JFrame;
导入javax.swing.JLabel;
导入javax.swing.JPanel;
导入javax.swing.Timer;
导入javax.swing.UIManager;
导入javax.swing.UnsupportedLookAndFeelException;
公开课考试{
公共静态void main(字符串[]args){
新测试();
}
公开考试(){
invokeLater(新的Runnable(){
@凌驾
公开募捐{
试一试{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(ClassNotFoundException |实例化Exception | IllegalacessException |不支持ookandfeelException ex){
例如printStackTrace();
}
JFrame=新JFrame(“测试”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(newtestpane());
frame.pack();
frame.setLocationRelativeTo(空);
frame.setVisible(true);
}
});
}
公共类TestPane扩展了JPanel{
私人标签;
私人淡定窗格淡定窗格;
私有文件[]图片;
私有整数索引;
公共测试窗格(){
//只是作秀
挫折地面(颜色:红色);
fadingPane=新的fadingPane(新的FadeListener(){
@凌驾
公共无效FadEdStart(FadingPane面板){
}
@凌驾
公共无效fadeDidStop(FadingPane面板){
}
@凌驾
公共无效渐减完成(渐减窗格面板){
nextPicture();
fadingPane.fadeIn();
}
@凌驾
公共无效fadeInDidComplete(FadingPane面板){
}
});
setLayout(新的BorderLayout());
setLayout(新的BorderLayout());
label=新的JLabel();
fadingPane.add(标签);
添加(淡入淡出窗格);
JButton next=新JButton(“next”);
添加(下一步,BorderLayout.SOUTH);
next.addActionListener(新ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
fadingPane.fadeOut();
}
});
图片=新文件(“/Volumes/Disk02/Dropbox/MegaTokyo/thumnails”).listFiles(新文件过滤器(){
@凌驾
公共布尔接受(文件路径名){
String name=pathname.getName().toLowerCase();
返回name.endsWith(“.jpg”)| name.endsWith(“.png”);
}
});
nextPicture();
}
受保护的void nextPicture(){
索引++;
如果(索引>=图片长度){
指数=0;
}
试一试{
BuffereImage img=图像IO.read(图片[索引]);
标签设置图标(ne)