我试图复制这个组件（在帖子底部），但是我似乎无法让它看起来好看。
所以我想知道，我如何复制这个渐变涂料？或者如果不是渐变涂料，我该怎么做才能获得类似的结果？
我的尝试与这个组件相比非常平淡黑色。而且它有JFrame选项（关闭、最小化等），并且组件看起来没有“圆角”。我正在寻找一个可以改进我已有内容并解释我哪里错了的人。我知道我可以简单地使用已经制作好的外观，但我想让我的示例项目尽可能接近BitDefender GUI中的图像，不包括文本。（如果需要，我可以提供代码）
还请注意，我跳过了背景和“病毒防护盾”、“自动扫描”、“我的BitDefender”面板之间的面板。主要是因为我想尽可能保持我的SSCCE尽可能小。
另外，我想指出，在3个上设置insets为gbc.insets = new Insets(2,10,2,10);使其看起来更接近BitDefender GUI的间距。 （我只是没有时间上传图片。所以我把代码留在原地，但我意识到它可以更新到上述间隔）。
编辑-使用更多源更新
这是我的代码/ SSCCE（它是3个单独的类，但我将它们合并为一个.java）
package testgui;
import java.awt.*;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class TestGui {
public TestGui() {
JFrame frame = new JFrame();
MidPanel midPanel = new MidPanel();
TopPanel topPanel1 = new TopPanel();
TopPanel topPanel2 = new TopPanel();
TopPanel topPanel3 = new TopPanel();
JLabel appName = new JLabel("MyApplication");
JLabel verNum = new JLabel("version 1.0");
Font verFont = new Font("Tahoma", Font.BOLD, 11);
Font nameFont = new Font("Tahoma", Font.BOLD, 14);
GridBagConstraints gbc = new GridBagConstraints();
appName.setForeground(Color.WHITE);
appName.setFont(nameFont);
verNum.setForeground(Color.WHITE);
verNum.setFont(verFont);
//add program name and version number
gbc.gridx = 0;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.WEST;
gbc.insets = new Insets(5, 5, 5, 5);
midPanel.add(appName, gbc);
gbc.gridx = 0;
gbc.gridy = 1;
gbc.anchor = GridBagConstraints.WEST;
gbc.insets = new Insets(5, 5, 5, 5);
midPanel.add(verNum, gbc);
//add 3 example top panels to midpanel
gbc.gridx = 0;
gbc.gridy = 2;
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.insets = new Insets(1,2,1,2);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 1.0;
midPanel.add(topPanel1, gbc);
gbc.gridx = 0;
gbc.gridy = 3;
gbc.insets = new Insets(1,2,1,2);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 1.0;
midPanel.add(topPanel2, gbc);
gbc.gridx = 0;
gbc.gridy = 4;
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.insets = new Insets(1,2,1,2);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 1.0;
midPanel.add(topPanel3, gbc);
//add panel to push other panels to top
gbc.gridx = 0;
gbc.gridy = 5;
gbc.fill = GridBagConstraints.VERTICAL;
gbc.weighty = 1.0;
JPanel invisPanel = new JPanel();
invisPanel.setOpaque(false);
midPanel.add(invisPanel, gbc);
frame.getContentPane().add(midPanel);
frame.pack();
frame.setVisible(true);
}
//test it out
public static void main(String[] args) {
new TestGui();
}
//class for the top 3 panels
private class TopPanel extends JPanel {
private int maxLength;
private boolean cyclic;
public TopPanel() {
initComponents();
setOpaque(false);
cyclic = true;
maxLength = 0;
}
@Override
public void paintComponent(Graphics g) {
if(isOpaque()) {
super.paintComponent(g);
return;
}
int width = getWidth();
int height = getHeight();
GradientPaint paint = null;
Color top = new Color(50, 50, 50);
Color btm = new Color(19, 19, 19);
paint = new GradientPaint(width / 2, 0, top, width / 2, maxLength > 0 ? maxLength : height, btm, cyclic);
if(paint == null) {
throw new RuntimeException("Invalid direction specified in GamerTagPanel");
}
Graphics2D g2d = (Graphics2D) g;
Paint oldPaint = g2d.getPaint();
g2d.setPaint(paint);
g2d.fillRect(0, 0, width, height);
g2d.setPaint(oldPaint);
super.paintComponent(g);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 200);
}
private void initComponents() {
GridBagConstraints gbc;
JLabel jLabel1 = new JLabel();
JLabel jLabel2 = new JLabel();
setBorder(BorderFactory.createLineBorder(new Color(204,204,204)));
setLayout(new GridBagLayout());
jLabel1.setFont(new Font("Tahoma", Font.BOLD, 11));
jLabel1.setForeground(new Color(255, 255, 255));
jLabel1.setText("Scanning...");
gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.insets = new Insets(5, 5, 5, 5);
add(jLabel1, gbc);
jLabel2.setFont(new java.awt.Font("Tahoma", Font.BOLD, 11));
jLabel2.setForeground(new java.awt.Color(255, 255, 255));
jLabel2.setText("C:\\Directory\\Folder\\SubFolder\\SpecificFolder\\File.file");
gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 1;
gbc.gridwidth = 2;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.weightx = 1.0;
gbc.insets = new Insets(5, 5, 5, 5);
add(jLabel2, gbc);
}
}
public class MidPanel extends JPanel {
private int maxLength;
private boolean cyclic;
public MidPanel() {
setLayout(new GridBagLayout());
setOpaque(false);
maxLength = 0;
cyclic = false;
}
@Override
public void paintComponent(Graphics g) {
if(isOpaque()) {
super.paintComponent(g);
return;
}
int width = getWidth();
int height = getHeight();
GradientPaint paint = null;
Color top = new Color(75, 75, 75);
Color btm = new Color(19, 19, 19);
paint = new GradientPaint(width / 2, 0, top, width / 2, maxLength > 0 ? maxLength : height, btm, cyclic);
if(paint == null) {
throw new RuntimeException("Invalid direction specified in GamerTagPanel");
}
Graphics2D g2d = (Graphics2D) g;
Paint oldPaint = g2d.getPaint();
g2d.setPaint(paint);
g2d.fillRect(0, 0, width, height);
g2d.setPaint(oldPaint);
super.paintComponent(g);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 400);
}
}
}
感谢JoopEggen指出我的GradientPaint颜色问题。这对我帮助很大。我仍然在寻找有人能够制作一个更好/更接近实际的示例。这是我第一次尝试以这种方式重写paintComponent。
备注：
paintComponent()进行了编辑。 - WilliamShatner