Java 使用计时器设置JPanel(滑入)动画
我正在尝试使用我制作的这个类从侧面制作JPanel幻灯片:Java 使用计时器设置JPanel(滑入)动画,java,swing,animation,timer,jpanel,Java,Swing,Animation,Timer,Jpanel,我正在尝试使用我制作的这个类从侧面制作JPanel幻灯片: public class AnimationClass { private int i; private int y; private JPanel panel; private int xTo; private Timer timer; private int xFrom; synchronized void slidePanelInFromRight(JPanel pane
public class AnimationClass {
private int i;
private int y;
private JPanel panel;
private int xTo;
private Timer timer;
private int xFrom;
synchronized void slidePanelInFromRight(JPanel panelInput, int xFromInput, int xToInput, int yInput, int width, int height) {
this.panel = panelInput;
this.xFrom = xFromInput;
this.xTo = xToInput;
this.y = yInput;
panel.setSize(width, height);
timer = new Timer(0, new ActionListener() {
public void actionPerformed(ActionEvent ae) {
for (int i = xFrom; i > xTo; i--) {
panel.setLocation(i, y);
panel.repaint();
i--;
timer.stop();
timer.setDelay(100);
if (i >= xTo) {
timer.stop();
}
}
timer.stop();
}
});
timer.start();
}
}
嗯,我不知道问题出在哪里。我尝试了很多不同的方法,但我似乎无法让它工作。计时器应该在每个刻度上改变位置,直到它就位。相反,在每个刻度上,您都在运行for next循环,它会阻止EDT,直到循环完成,从而阻止更新UI 使用示例更新 例如
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Action;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestAnimatedPane {
public static void main(String[] args) {
new TestAnimatedPane();
}
public TestAnimatedPane() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JPanel panel;
public TestPane() {
setLayout(null);
panel = new JPanel();
panel.setBackground(Color.RED);
add(panel);
Dimension size = getPreferredSize();
Rectangle from = new Rectangle(size.width, (size.height - 50) / 2, 50, 50);
Rectangle to = new Rectangle((size.width - 50) / 2, (size.height - 50) / 2, 50, 50);
Animate animate = new Animate(panel, from, to);
animate.start();
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
public static class Animate {
public static final int RUN_TIME = 2000;
private JPanel panel;
private Rectangle from;
private Rectangle to;
private long startTime;
public Animate(JPanel panel, Rectangle from, Rectangle to) {
this.panel = panel;
this.from = from;
this.to = to;
}
public void start() {
Timer timer = new Timer(40, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
long duration = System.currentTimeMillis() - startTime;
double progress = (double)duration / (double)RUN_TIME;
if (progress > 1f) {
progress = 1f;
((Timer)e.getSource()).stop();
}
Rectangle target = calculateProgress(from, to, progress);
panel.setBounds(target);
}
});
timer.setRepeats(true);
timer.setCoalesce(true);
timer.setInitialDelay(0);
startTime = System.currentTimeMillis();
timer.start();
}
}
public static Rectangle calculateProgress(Rectangle startBounds, Rectangle targetBounds, double progress) {
Rectangle bounds = new Rectangle();
if (startBounds != null && targetBounds != null) {
bounds.setLocation(calculateProgress(startBounds.getLocation(), targetBounds.getLocation(), progress));
bounds.setSize(calculateProgress(startBounds.getSize(), targetBounds.getSize(), progress));
}
return bounds;
}
public static Point calculateProgress(Point startPoint, Point targetPoint, double progress) {
Point point = new Point();
if (startPoint != null && targetPoint != null) {
point.x = calculateProgress(startPoint.x, targetPoint.x, progress);
point.y = calculateProgress(startPoint.y, targetPoint.y, progress);
}
return point;
}
public static int calculateProgress(int startValue, int endValue, double fraction) {
int value = 0;
int distance = endValue - startValue;
value = (int)Math.round((double)distance * fraction);
value += startValue;
return value;
}
public static Dimension calculateProgress(Dimension startSize, Dimension targetSize, double progress) {
Dimension size = new Dimension();
if (startSize != null && targetSize != null) {
size.width = calculateProgress(startSize.width, targetSize.width, progress);
size.height = calculateProgress(startSize.height, targetSize.height, progress);
}
return size;
}
}
更新
我应该在昨晚加上这句话(1岁的人不想睡觉,2个父母不想睡觉,不要再说了…)
动画是一个复杂的主题,尤其是当您开始关注可变速度时(示例是静态的)
不要重新发明轮子,你应该认真考虑一下……/P>
- -这是一个基本的动画框架,对您可能喜欢如何使用它没有任何假设
- -与计时框架类似,但也支持内置的基于Swing的组件(通过反射)
JLayeredPane
中封闭面板的首选尺寸
/**
* @see https://stackoverflow.com/a/16322007/230513
* @see https://stackoverflow.com/a/16316345/230513
*/
public class TestPane extends JLayeredPane {
private static final int WIDE = 200;
private static final int HIGH = 5 * WIDE / 8; // ~1/phi
private JPanel panel;
public TestPane() {
panel = new JPanel();
panel.setBackground(Color.RED);
panel.add(new JButton("Test"));
add(panel);
Dimension size = panel.getPreferredSize();
int half = HIGH / 2 - size.height / 2;
Rectangle from = new Rectangle(size);
from.translate(WIDE, half);
Rectangle to = new Rectangle(size);
to.translate(0, half);
panel.setBounds(from);
Animate animate = new Animate(panel, from, to);
animate.start();
}
@Override
public Dimension getPreferredSize() {
return new Dimension(WIDE, HIGH);
}
}
任何事都要以身作则
包测试包;
导入java.awt.Color;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.util.logging.Level;
导入java.util.logging.Logger;
导入javax.swing.JButton;
导入javax.swing.JFrame;
导入javax.swing.JLabel;
导入javax.swing.JPanel;
公共类ToggleBtn扩展了JPanel{
JFrame框架;
JPanel小组;
拉贝隆;
拉贝洛夫;
JButton-btn;
整数计数=1;
公共切换btn(){
frame=新的JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
机架立根(500300300300);
frame.setLayout(空);
panelOut=新的JPanel(空);
立根(50,100,120,30);
镶板。背景(颜色。灰色);
框架。添加(面板);
btn=新的JButton(“:”);
btn.立根(0,0,60,30);
添加(btn);
btn.addActionListener(新ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
startThread();
}
});
labelOn=新的JLabel(“ON”);
拉贝隆后缘(0,0,60,30);
面板。添加(labelOn);
labelOff=新的JLabel(“关闭”);
labelOff.立根(60,0,60,30);
面板。添加(labelOff);
frame.setVisible(true);
}
public void startThread(){
计数++;
新移动().start();
}
公共静态void main(字符串[]args){
新的ToggleBtn();
}
类移动扩展线程{
@凌驾
公开募捐{
如果(计数%2==0){
系统输出打印项次(“如果”);
对于(int i=0;i=0;i--){
试一试{
睡眠(3);
}捕获(中断异常例外){
Logger.getLogger(ToggleBtn.class.getName()).log(Level.SEVERE,null,ex);
}
btn.立根(i,0,60,30);
}
}
}
}
}
OP的代码中存在许多问题。正如MadProrammer所指出的,每个计时器滴答声只能移动一步。这里是一个简单的、经过测试的OPs代码修正,它将JPanel一次移动一个像素,每秒移动25次。请注意以下评论:
synchronized void slidePanelInFromRight(JPanel panelInput, int xFromInput, int xToInput, int yInput, int width, int height) {
this.panel = panelInput;
this.xFrom = xFromInput;
this.xTo = xToInput;
this.y = yInput;
panel.setSize(width, height);
// timer runs 25 times per second
timer = new Timer(40, new ActionListener() {
public void actionPerformed(ActionEvent ae) {
// Must 'remember' where we have slid panel to by using instance variable rather than automatic variable
// Only move one step at a time.
// No need to restart timer, it continues to run until stopped
if (xFrom > xTo){
xFrom = xFrom - 1;
panel.setLocation(xFrom, y);
panel.repaint();
} else {
timer.stop();
}
panel.setLocation(xFrom, y);
panel.repaint();
}
});
timer.start();
}
您的问题到底是什么,目前表现如何?非常感谢。这是可行的,但我还是想知道运动的速度。如何设置计时器中每个“循环”之间的等待时间?现在,它运行得非常慢(一次1px),但是如果我能减少每次px移动之间的等待时间,那就太完美了。虽然你有点不明白,但我还是不明白。你有很多可以影响速度的变量。第一个是实际计时器的滴答声延迟,我已将其设置为40,这将给您大约25fps。“运行时间”参数确定动画应播放多长时间,设置为2秒。我会在跑步时间玩。动画示例允许每个循环之间的可变延迟,这将为您提供更平滑的动画+1,以获得良好的因数;我无法抗拒。这种方法无法正确同步对
btn
的访问。
synchronized void slidePanelInFromRight(JPanel panelInput, int xFromInput, int xToInput, int yInput, int width, int height) {
this.panel = panelInput;
this.xFrom = xFromInput;
this.xTo = xToInput;
this.y = yInput;
panel.setSize(width, height);
// timer runs 25 times per second
timer = new Timer(40, new ActionListener() {
public void actionPerformed(ActionEvent ae) {
// Must 'remember' where we have slid panel to by using instance variable rather than automatic variable
// Only move one step at a time.
// No need to restart timer, it continues to run until stopped
if (xFrom > xTo){
xFrom = xFrom - 1;
panel.setLocation(xFrom, y);
panel.repaint();
} else {
timer.stop();
}
panel.setLocation(xFrom, y);
panel.repaint();
}
});
timer.start();
}