问题描述
Icon icon = new ImageIcon(getClass().getResource( "/img/icon.gif" ) );
aButton = new JButton("Its a button", icon);
是否存在某种可以阻止动画播放的方法?我当时想分配一个gif的静态jpg,然后当我将鼠标悬停时分配一个动画的gif,但是我不认为在MouseMotionListener
中有一个腾出鼠标的事件,因此我可以加载该静态jpg./p>
gif会在按钮中循环播放,但是,如果我将鼠标悬停在它上面,它将消失.
如果鼠标光标不在按钮上,如何使gif静态?
如果我使用MouseMotionListener
,如果我取下鼠标会触发事件吗?
@Override
public void mouseMoved(MouseEvent e) {
//play the gif
//if I take mouse off, call some method to stop playing animated gif
}
@Override
public void mouseDragged(MouseEvent e) {
}
请参阅:
-
setIcon(Icon)
-
setDisabledIcon(Icon)
-
setPressedIcon(Icon)
-
setRolloverIcon(Icon)
-
setSelectedIcon(Icon)
无需设置显式鼠标侦听器,切换会自动发生.
E.G.在此示例中,我没有添加MediaTracker
,因此将图像弹出到标签中以允许加载时间.最终用户是ImageObserver
(请等到看到它旋转后再关闭第一个对话框).
import java.awt.*;
import java.awt.image.BufferedImage;
import java.net.URL;
import javax.swing.*;
public class ImageSwapOnButton {
public static void main( String[] args ) throws Exception {
URL url = new URL("http://1point1c.org/gif/thum/plnttm.gif");
Image image = Toolkit.getDefaultToolkit().createImage(url);
ImageIcon spinIcon = new ImageIcon(image);
JOptionPane.showMessageDialog(null, new JLabel(spinIcon));
// create a static version of this icon
BufferedImage bi = new BufferedImage(150,150,BufferedImage.TYPE_INT_ARGB);
Graphics g = bi.getGraphics();
g.drawImage(image,0,0,null);
g.dispose();
ImageIcon staticIcon = new ImageIcon(bi);
JButton button = new JButton(staticIcon);
button.setRolloverIcon(spinIcon);
JOptionPane.showMessageDialog(null, button);
}
}
此外,请勿将静态图像制作为JPEG. JPEG有损,并且不支持透明性.使用单帧GIF或PNG.
Icon icon = new ImageIcon(getClass().getResource( "/img/icon.gif" ) );
aButton = new JButton("Its a button", icon);
Is there some kind of method that can stop an animated from playing?I was thinking of assigning a static jpg of the gif, then when I hover, assign the animated gif, but I don't think there is an event for taking off mouse in MouseMotionListener
so I can load back the static jpg.
The gif loops in the button, however, if I hover over it, it disappears.
How can I make the gif static if my mouse cursor is not on the button?
If I use MouseMotionListener
, does it fire an event if I take off my mouse?
@Override
public void mouseMoved(MouseEvent e) {
//play the gif
//if I take mouse off, call some method to stop playing animated gif
}
@Override
public void mouseDragged(MouseEvent e) {
}
See:
No need for setting an explicit mouse listener, the changeover happens automatically.
E.G. In this example I did not add a MediaTracker
so popped the image into a label to allow for load time. The end user is the ImageObserver
(wait till you see it spin before dismissing the first dialog).
import java.awt.*;
import java.awt.image.BufferedImage;
import java.net.URL;
import javax.swing.*;
public class ImageSwapOnButton {
public static void main( String[] args ) throws Exception {
URL url = new URL("http://1point1c.org/gif/thum/plnttm.gif");
Image image = Toolkit.getDefaultToolkit().createImage(url);
ImageIcon spinIcon = new ImageIcon(image);
JOptionPane.showMessageDialog(null, new JLabel(spinIcon));
// create a static version of this icon
BufferedImage bi = new BufferedImage(150,150,BufferedImage.TYPE_INT_ARGB);
Graphics g = bi.getGraphics();
g.drawImage(image,0,0,null);
g.dispose();
ImageIcon staticIcon = new ImageIcon(bi);
JButton button = new JButton(staticIcon);
button.setRolloverIcon(spinIcon);
JOptionPane.showMessageDialog(null, button);
}
}
Also, don't make the static image as JPEG. A JPEG is lossy and does not support transparency. Either use a single frame GIF or a PNG.
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