通过透明JFrame添加图像 [英] Adding Image over a Transparent JFrame
本文介绍了通过透明JFrame添加图像的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在透明的JFrame上显示图像.
图像显示不清晰.如果我添加任何组件(如JButton或其他任何组件),则显示得很好,除了任何内部有图像的组件.
I want to display an image over a transparent JFrame.
The image is not shown clearly.
If I add any component like JButton or anything else it is displayed well except
any component which has image inside it.
这是一个代码示例.
import java.awt.Color;
public class PunchFrame2 extends javax.swing.JFrame {
public PunchFrame2() {
initComponents();
setUndecorated(true);
setBackground(new Color(0,0,0,0));
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel2 = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBackground(java.awt.Color.black);
jLabel2.setFont(new java.awt.Font("Ubuntu", 1, 48)); // NOI18N
jLabel2.setForeground(java.awt.Color.white);
jLabel2.setText("Steve Jobs");
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap(234, Short.MAX_VALUE)
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel1)
.addGap(23, 23, 23))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel2)
.addContainerGap(21, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel1))
);
jLabel3.setIcon(new javax.swing.ImageIcon("/home/username/Desktop/stevejobs.png")); // NOI18N
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
.addGroup(layout.createSequentialGroup()
.addGap(200, 200, 200)
.addComponent(jLabel3)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel3)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screenSize.width-545)/2, (screenSize.height-290)/2, 545, 290);
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new PunchFrame2().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel jPanel1;
// End of variables declaration }
我尝试了很多类似的事情 jLabel1.setOpaque(false);
但徒劳.
I tried many things like
jLabel1.setOpaque(false);
but in vain.
如何解决这个问题?
使用的图像:
结果:
推荐答案
您只需调用 setVisible(true)
.但是默认的 JFrame
宽度和高度为零.它不会扩展 JFrame
.
You just call setVisible(true)
. But the default JFrame
width and height is zero. It will not expand the JFrame
.
尝试设置 JFrame
的大小.有两种方法:
Try to set the size of JFrame
.
there are two ways:
PunchFrame2 frame = new PunchFrame2();
-
frame.pack();//或
-
frame.setSize(300,300);
frame.setVisible(true);
这篇关于通过透明JFrame添加图像的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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