我想要的是使不可编辑的文本区域的背景与其禁用的背景相同.
我知道UIManager可以使用TextArea.disabled键获得颜色：
DerivedColor(color=214,217,223 parent=control offsets=0.0,0.0,0 pColor=214,223
我首先尝试过：
textArea.setBackground(UIManager.getColor("TextArea.disabled"));
它什么都没改变,背景仍然是白色的.
然后我尝试了：
textArea.setBackground(new Color(UIManager.getColor("TextArea.disabled").getRGB()));
背景确实发生了变化,但与看起来更亮的残疾背景并不完全相同.
处理这种衍生颜色的正确方法是什么？
最佳答案
@Zhao Yi wrote There is no key for uneditable background
>再次看到Oracle Tutorial about Look and Feel,覆盖proper Keys for JTextArea
>键值适用于Painter
> TextArea [Disabled NotInScrollPane] .backgroundPainter
> TextArea [Disabled] .backgroundPainter
Java6的代码,必须更改Java7的导入
import com.sun.java.swing.Painter;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
public class TestNimbusUIManagerTextArea {
private static JFrame frame = new JFrame("Nimbus UIDeafaults");
private JTextArea testEnableTextArea = new JTextArea("enabled JTextArea");
private JTextArea testDisableTextArea = new JTextArea("disabled JTextArea");
public TestNimbusUIManagerTextArea() {
testDisableTextArea.setEnabled(false);
frame.setLayout(new GridLayout(2,20,20));
frame.add(testEnableTextArea);
frame.add(testDisableTextArea);
frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(200,105);
frame.pack();
frame.setVisible(true);
}
private static void customizeNimbusLaF() {
UIManager.getLookAndFeelDefaults().put(
"TextArea[Enabled+NotInScrollPane].backgroundPainter",new FillPainter(new Color(127,255,191)));
UIManager.getLookAndFeelDefaults().put(
"TextArea[Disabled+NotInScrollPane].backgroundPainter",191)));
SwingUtilities.updateComponentTreeUI(frame);
}
public static void main(String arg[]) {
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
customizeNimbusLaF();
break;
}
}
} catch (Exception e) {
}
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
TestNimbusUIManagerTextArea tNUIM = new TestNimbusUIManagerTextArea();
}
});
}
}
class FillPainter implements Painter