动画ImageIcon作为按钮 [英] Animated ImageIcon as Button

问题描述

我有一个imageIcon作为Button，现在我将在鼠标悬停时对其进行动画处理.我试图在setRolloverIcon(Icon)上使用动画gif(无循环).但是当我再次将鼠标悬停在该按钮上时，gif不再播放.当我使用循环gif时，它会从随机帧播放它.我尝试使用paintComponent绘制一个Shape或图像作为Button，效果很好，但是即使我使用setPreferredSize()或setSize()或setMaximumSize()时，Button也使用其默认大小，如您在图片中所见(中间按钮).我正在使用GroupLayout，这可能是问题所在吗?

I have an imageIcon as Button, now i would to animate it when you rollover. I tried to use a animated gif (without loop) on setRolloverIcon(Icon). But when i hover again on the button the gif is not playing again. When i use a looped gif then it plays it from a random frame. I tried using paintComponent to draw a Shape or an image as Button, which works fine, but even when i use setPreferredSize() or setSize() or setMaximumSize() the Button uses its default size, as you can see in the picture (middle button). Im using GroupLayout, might this be the problem?

推荐答案

似乎对我来说很好...

Seems to work just fine for me...

我使用了以下图标...(png和gif)...

I used the following icons...(png and gif)...

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class AnimatedButton {

    public static void main(String[] args) {
        new AnimatedButton();
    }

    public AnimatedButton() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException ex) {
                } catch (InstantiationException ex) {
                } catch (IllegalAccessException ex) {
                } catch (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 ImageIcon animatedGif;

        public TestPane() {
            setLayout(new GridBagLayout());
            JButton btn = new JButton(new ImageIcon("WildPony.png"));
            btn.setRolloverEnabled(true);
            animatedGif = new ImageIcon("ajax-loader.gif");
            btn.setRolloverIcon(animatedGif);
            add(btn);

            btn.addMouseListener(new MouseAdapter() {

                @Override
                public void mouseEntered(MouseEvent e) {
                    animatedGif.getImage().flush();
                }

            });
        }    
    }
}

我刚刚意识到您正在使用非循环gif.这意味着您将不得不尝试重置"以重新开始播放.

I just realised that you are using a non-looping gif. This means you are going to nee to try and "reset" to start it playing again.

尝试使用类似icon.getImage().flush();的方式，其中icon是您的ImageIcon.您将必须在按钮上附加MouseListener来检测mouseEnter事件并重置ImageIcon ...

Try using something like icon.getImage().flush();, where icon is your ImageIcon. You're going to have to attach a MouseListener to the button to detect the mouseEnter event and reset the ImageIcon...

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