Lan*_*ler 3 java animation swing 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 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();
}
}
好吧,我不知道问题是什么.我尝试了很多不同的东西,但我似乎不能让它发挥作用.
计时器应该改变每个滴答的位置,直到它到位,而不是在每个滴答,你正在运行for-next循环,这阻止了EDT直到循环结束,阻止更新UI
以示例更新
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
我应该在昨晚添加这个(1年不想上床,2个父母,不再说...)
动画是一个复杂的主题,尤其是当您开始查看变速时(示例是静态的).
你应该认真考虑看看...而不是重新发明轮子.