Java 透明按钮
是否可以使JButton透明(包括边框),但不透明文本?我扩展swing的JButton并覆盖以下内容:Java 透明按钮,java,swing,jbutton,Java,Swing,Jbutton,是否可以使JButton透明(包括边框),但不透明文本?我扩展swing的JButton并覆盖以下内容: @Override public void paint(Graphics g) { Graphics2D g2 = (Graphics2D) g.create(); g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0)); super.paint(g2); g2.dispo
@Override
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g.create();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0));
super.paint(g2);
g2.dispose();
}
但它使一切透明,包括文本。谢谢。以下内容应该可以解决这个问题
button.setOpaque(false);
button.setContentAreaFilled(false);
button.setBorderPainted(false);
public class PlainJButton extends JButton {
public PlainJButton (String text){
super(text);
setBorder(null);
setBorderPainted(false);
setContentAreaFilled(false);
setOpaque(false);
}
// sample test method
public static void main(String[] args) {
JFrame frame = new JFrame();
JPanel pane = new JPanel();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pane.add(new PlainJButton("HI!!!!"));
frame.add(pane);
frame.pack();
frame.setVisible(true);
}
}
您程序的用户无法将您的按钮城市化为按钮。使用可以认为它是一个标签。因此,我的解决方案是半透明的,边界出现和消失 这个代码改进了,改进了代码,更好,更好的性能,更漂亮,更专业
import java.awt.Color;
import static java.awt.Color.blue;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
class Test extends JFrame {
Test() {
setLayout(null);
JButton testButton = new JButton("Test_Button");
testButton.setBounds(200, 200, 200, 20);
testButton.setOpaque(false); // Must add
testButton.setContentAreaFilled(false); // No fill
testButton.setFocusable(false); // I'd like to set focusable false to the button.
testButton.setBorderPainted(true); // I'd like to enable it.
testButton.setBorder(null); // Border (No border for now)
add(testButton);
testButton.addMouseListener(new MouseAdapter(){
@Override
public void mouseEntered(MouseEvent e){
testButton.setBorder(BorderFactory.createLineBorder(blue, 2,true));
//When enter we can not know our mouse successfully entered to the button. So I'd like to add Border
}
@Override
public void mouseExited(MouseEvent e){
testButton.setBorder(null);
//When mouse exits no border.
}
});
// For a half of transparent I'd like a add JPanel behind JButton
JPanel backPanel = new JPanel();
backPanel.setBounds(testButton.getBounds()); // Same to buttons bounds.
backPanel.setBackground(new Color(0, 0, 0, 50)); // Background with transeparent
add(backPanel);
JLabel icon = new JLabel();
icon.setBounds(0, 0, 3840, 2160);
icon.setIcon(new ImageIcon(getClass().getResource("wallpaper_16105238065ffea49e5ec9d2.04136813.jpeg")));
add(icon);
//Background image for test up it.
testButton.addActionListener((ActionEvent e) -> {
testButton.setBorder(null); // When mouse clicked border will dissaprear.
System.out.println("Button clicked!");
//For check the button works correctly.
});
setSize(800, 500);
setVisible(true);
}
public static void main(String[] args) {
new Test();
}
}
那么你基本上想要一个没有文本的
JButton
?我想他想要一个只有文本的JButton。自定义绘制(如果需要)是通过覆盖paintComponent()方法而不是paint()方法来完成的。@camickr它来自于。哎呀,我的答案看起来和你的一样。setOpaque救了我的命:)button.setorderprograted(false)如果我们想在按钮“setOpaque
saved my life”周围画一条线,code>可以省略。实际上@Birdy,这是不必要的(至少在我刚才在Windows上测试的五个plaf中是这样)。正是setContentAreaFilled
使按钮BG消失。请看一个例子。很抱歉在这个问题上跳到(检查手表)有点晚,但今天我注意到它只是一个问题的副本。在我的情况下,我还必须添加按钮。setFocusPainted(false)
以完全删除我的按钮边框:)你可以使用JPanel的半透明