I have a JTextArea which displays HTML of an Arabic web page. So it's essentially a mix of English and Arabic. In the JTextArea, with columns set to 30, certain text just disappears instead of wrapping properly. The weird thing is that if I copy the invisible text and paste it into Notepad, then I can see it in Notepad. If I change the number of columns to 40, everything displays fine. Any ideas?
See this screenshot of the problem:
Elie, thanks for the response. Not sure I explained the problem properly though. On the left in the screenshot is the JTextArea. On the right is the selection from the JTextArea pasted into Notepad. Does this make more sense now?
Is it the 30th character which is disappearing? It's possible due to the script that the JTextArea cannot render the Arabic characters properly. So it's counting the characters correctly, but doesn't realize that they take up more space. Support for such fonts is not great, so you may want to write a custom renderer for your JTextArea to deal with this (so you can manually take into account the proper amount of space required per character in Arabic and adjust the line wrap accordingly).
Related
Please read before labelling this as a duplicate.
I am creating an application that calculates how fast a person can type by calculating WPM and CPM. However I have hit a snag with the UI as I found out that you cannot really highlight individual strings in a TextArea. My goal is to compare what the user is typing to the random text that is generated by having it so that the text is being dynamically coloured or highlighted as the user is typing.
See http://10fastfingers.com/typing-test/english to get an idea of what I mean
I recently read the following post Highlighting Strings in JavaFX TextArea
I was trying to achieve the same goal of highlighting individual strings inside a javaFX TextArea until I realised that it pretty much is not possible. So I looked into TextFlow which does allow me to edit individual strings. The problem with TextFlow is that all 200 of the generated words would have to appear at once which is not what I want. With a TextArea not all the text has to be displayed at once.
This is what I have so far just so that you can further get an idea of where I am heading with this.
I am working a java chat application and I am adding emoticons by replacing the emoticon shortcut, like :) ,with ◕‿◕ . Its not an image that I am replacing it with but simple text. Now the problem that I am facing is that sometimes I get just Square boxes instead of the actual thing that I want. I am making these images/texts in MS Word by converting the unicode to the actual image. I am also using various online resources to get these images/text.
Can anyone tell me how to get rid of the boxes and get the actual text.
My encoding is in UTF-8 and my font is also set to monospaced.
Your unicode-character is probably not supported by your font. Either the font implements the character as a box, or the operating system / font-renderer draws a box instead of the glyph.
I would say the Font used in your application just cannot show some chars. Find one which font really can and use it there.
Font has boolean canDisplay(char c) method which you can use.
See also the doc about font
In Browser the Unicode character (ரு) is showing properly. If I copy paste it in swing textfield it appears wrong.
PS: it is the combination of two character.
Please help on this.
For this type of characters font and uni coding must be supported by the system.
This is similar to my own previous question, but that solution didn't work here.
As mentioned in the previous question, I'm working on a cross platform(Windows/Ubuntu) application that has to transliterate English into one of several official Indian languages. The application has a custom input method, and typing in English and pressing space will transliterate the typed text into the specific local language. Urdu is different from the others in being right to left, like Arabic/Hebrew.
I managed to find an open licensed Urdu font that has both English and Urdu glyphs, but when I type characters in English, nothing shows up.
I don't understand whether it's a font painting issue, or related to the input method. So far, if I disable the custom input method (InputMethod.dispatchEvent() ) for this language, I am able to see the English text (but of course no transliteration takes place).
My findings:
Change font to one of Windows' built in Arabic fonts - same result.
Instead of using ComponentOrientation to align text in the text field, I used setHorizontalAlignment for when the locale is Urdu. Same result.
Decompiled the JDK's default input method provider on Windows (sun.awt.windows.WInputMethod). Here I see the dispatchEvent() makes a native call to the OS for handling IME. I can't do that here.
Found a custom IM for Hebrew - my version of dispatchEvent() is essentially the same.
Stepped through code for JTextField in Eclipse - wasn't able to find anything in the AbstractDocument and subclasses. The AbstractDocument.insertUpdate() method checks for and updates bidirectional text input, but there wasn't anything else significant.
I'm unable to understand what happens after the dispatchEvent() call. The characters are being registered, i.e. the transliteration engine is able to detect the typed characters and process them, but they just don't show up on screen.
Workaround
If I let the text field's orientation be as it is for regular left to right languages, I can see the English text. However, this would not be acceptable to an Urdu speaking user.
Can someone point me in the right direction?
I set the locale to ur_IN.
Sadly, ur_IN is not among the supported locales; I only see en_IN and hi_IN. In the example cited, I used the following code to get the image below:
spinner.setLocale(new Locale("hi", "IN"));
I'm trying and failing to understand how to use Java's text editor components to colorize text as you insert it. I don't want or need a fully featured syntax highlighting library.
Basically, I have a JTextField (or some other JText... component), and a list of words. I want any words in the field that appear in the list to be red, and the rest of the words be green. So for example, if "fire" is in the list, "fir" would appear green and "fire" would appear red.
I've tried using a JTextPane and a DefaultStyledDocument, using a KeyListener to go over the text in the document and using AbstractStyledDocument.replace to replace the existing words with versions that have the correct attributes. This didn't do anything. What am I doing wrong?
Neither JTextPane nor JTextField isn't able to present formatted text, i.e text having more than one format. For text-editor-like capabilities like you'd find in WordPad or HTML, the component to use is the JEditorPane or its descendant, JTextPane.
The simplest thing you can do is set the ContentType of the JEditorPane to "text/html" and simply set its text to a string containing HTML. The Java structured text components are surprisingly competent with HTML; you can display tables and/or DIVs, and there is support for much of CSS2. Simplest to do your styles inline, but you can even do external style hrefs.
If you want to get fancy programmatically, you can access the DocumentModel and create text from spans of text each having their own formatting. The DocumentModel works essentially like a programmable text editor.
EDIT: Re-reading your question, I see my answer doesn't quite address it. Since you want multi-colored text JEditorPane is your only option; but rather than just piping in pre-colored text via HTML or such, you'll have to put a listener on your document model to catch changes introduced when you type; and after every document change you'll want to examine the text (again from the Document model) for text that should or should not be highlighted, and you'll want to apply formatting to certain runs of text.
There are devils in the details, but this should get you started.