Hi, here is the reproducer;
OpenJDK version/OS version:
openjdk 11.0.8 2020-07-14 / Mint Linux 20
openjdk 1.8.0_265 / Ubuntu 20.04
import java.awt.*;
import javax.swing.*;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.StyleSheet;
public class Example {
private String toHex(Color color) {
return String.format("#%02x%02x%02x", color.getRed(), color.getGreen(),
color.getBlue());
}
public Example() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException |
IllegalAccessException | UnsupportedLookAndFeelException e) {
e.printStackTrace();
}
JFrame frame = new JFrame();
JTextPane pane = new JTextPane();
pane.setContentType("text/html");
((HTMLDocument) pane.getDocument()).setPreservesUnknownTags(false);
String text = "Displays the text using htmlDocument class <br/>"
+ "font color : TextPane.foreground=" +
toHex(UIManager.getColor("TextPane.foreground"))
+ "<br/> background color : TextPane.background=" +
toHex(UIManager.getColor("TextPane.background"))
+ "<br/><br/> background color should lighter when light mode
and darker when dark mode.";
StyleSheet styleSheet = ((HTMLDocument)
pane.getDocument()).getStyleSheet();
styleSheet.addRule("body { font-family: Arial; font-size: 24pt;
font-style: bold;"
+ " color: " + toHex(UIManager.getColor("TextPane.foreground"))
+ "; "
+ " background: " +
toHex(UIManager.getColor("TextPane.background")) + "; "
+ " }");
pane.setText(text);
pane.setPreferredSize(new Dimension(800, 200));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(pane, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
new Example();
}
}
** Attachment added: "Screencapture on Ubuntu 20.04 with reproducer"
https://bugs.launchpad.net/ubuntu/+source/openjdk-lts/+bug/1894419/+attachment/5416409/+files/Screenshot%20from%202020-10-02%2012-43-11.png
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https://bugs.launchpad.net/bugs/1894419
Title:
Wrong TextPane.background color with GTKLookAndFeel on dark theme
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