JTextField has wrong text render on RIGHT_TO_LEFT component orientation
We need a workaround, since whenever JTextField is filled with text that contains:
Right to left textlike Arabic,Latin numbers,- and
Latin text.
Then JTextField renders text parts at unexpected locations.
(It only renders right if the complete text Fits inside the
JTextField.)
The text we use to reproduce is:
صندوق ۴۰×۳۰ پایه دار وایرنگ میتر تک فاز
Other info:
- Above text is just name of a product, added inside an accounting software we created, but our users have match more render failures than we could reproduce.
- We reported at: JDK-8194733
- We have no experience with a custom-render in Java to make workaround, but render of entire text not considering the limit, and clipping that, should do the trick.
Source code for an executable test case:
//
// Like you may notice, below code shows simple JTextField,
// but once you resize the Window smaller than the text Fits,
// then you experience numbers dancing (moving around randomly).
//
// And trying to select parts of text is even more fatal (random parts are rendered).
//
package test;
import java.awt.ComponentOrientation;
public class JavaBug extends javax.swing.JFrame {
public static void main(String[] args) {
JavaBug frame = new JavaBug();
frame.show();
}
public JavaBug() {
javax.swing.JTextField textField = new javax.swing.JTextField();
textField.setFont(new java.awt.Font("Tahoma", 0, 24)); // NOI18N
// Below is just name of a product, added inside an accounting software.
textField.setText("u0635u0646u062Fu0648u0642 u06F4u06F0×u06F3u06F0 u067Eu0627u06CCu0647 u062Fu0627u0631 u0648u0627u06CCu0631u0646u06AF u0645u06CCu062Au0631 u062Au06A9 u0641u0627u0632");
textField.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
getContentPane().add(textField);
pack();
this.setLocationRelativeTo(null); //enusre get showed at screen center
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
}
}
Screen shots
Just running above code results to:
After resize, to something less:
Development Kit or Runtime version:
- java version “1.8.0_25”
- Java(TM) SE Runtime Environment (build 1.8.0_25-b18)
- Java HotSpot(TM) Client VM (build 25.25-b02, mixed mode)
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Answer
You can try this
import javax.swing.*;
import javax.swing.text.html.HTMLEditorKit;
import java.awt.*;
public class JavaBug extends javax.swing.JFrame {
public static void main(String[] args) {
JavaBug frame = new JavaBug();
frame.show();
}
public JavaBug() {
JTextPane textPane = new JTextPane();
textPane.setEditorKit(new HTMLEditorKit());
textPane.setText("<html><font size='+2'>u0635u0646u062Fu0648u0642 u06F4u06F0×u06F3u06F0 u067Eu0627u06CCu0647 u062Fu0627u0631 u0648u0627u06CCu0631u0646u06AF u0645u06CCu062Au0631 u062Au06A9 u0641u0627u0632</font></html>");
textPane.getDocument().putProperty("i18n", Boolean.TRUE);
JPanel noWrapPanel = new JPanel( new BorderLayout() );
noWrapPanel.add( textPane );
JScrollPane scrollPane = new JScrollPane( noWrapPanel );
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
/* without below right to left force there is an other bug when we press home and
* try to navigate to end using left key it will never get at end and fall back at start. kind of crazy bug */
java.util.Locale arabic = new java.util.Locale("ar", "KW");
ComponentOrientation arabicOrientation = ComponentOrientation.getOrientation(arabic);
textPane.applyComponentOrientation(arabicOrientation);
getContentPane().add(scrollPane);
pack();
this.setLocationRelativeTo(null); //enusre get showed at screen center
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
}
}