I am creating an open source document editor in Java Swing and I want to implement the CTRL-F (find) functionality in swing. Without starting from the ground up is there any open source Java code available which I can borrow where this functionality is already implemented?
Key Bindings is what you are looking for. Here is the tutorial: http://docs.oracle.com/javase/tutorial/uiswing/misc/keybinding.html
JDialog (or frame.showInputDialog) is what you should use after the ctrl+F action is fired. Enter the search string here and search the document from the returned string. Again the tutorial is in the java docs.
Highlighting is quite complicated and depends on what code you have written. You will have to use the repaint method on some selected text after using the seBackgroundColor(Color color)
You haven't placed any code so I can't answer with any code. But its a much better idea to see the tutorial and understand it yourself rather than copy-pasting code.
Related
I'm working on one of my first java applets and I want to start of fairly simple (though I have a good understanding of how code works I dont know much in terms of what methods I all have at my disposal when using java)
I have created a Jframe window that has a JTextarea in it. I would like to execute certain lines of code when certain things are typed into this box. In essence, its a simple text input system. How would I go about doing this or is there a better component to use for this?
in addition to getText(), for JTextField some prefer the getDocument() method. In Java, Listeners are used to capture events, such as "what was typed to the text area". This tutorial will get you started, if you have trouble implementing you can come back with a more specfic question and some code :)
I'm looking for a way to provide 'text folding' capabilities to a swing JTextArea or JTextPane
More specifically, I want to add a block of data in a text component and I want the component to display only some header line. Then the user can unfold the block by clicking some icon. This is just like the code folding feature in most IDE.
I've found ->some sample code<- after some thorough search, but the mechanisms used here are quite obscure to me and it stops working when I try to remove text from the document.
Maybe using XML as input could be a lead ?
This one how to add collapsible area
http://java-sl.com/collapse_area.html
This one how to represent XML
http://java-sl.com/xml_editor_kit.html
I would start by looking at the NetBeans API: http://bits.netbeans.org/dev/javadoc/org-netbeans-modules-editor-fold/overview-summary.html
If you were to do it yourself, you'd need to provide a Document implementation that makes the JTextComponent think that pieces are being added or removed, then attach click events that tell the document to update itself. A lot of work.
Visually, it may also be better to use JEditorPane, but that's probably more work.
I am not a java expert. Just learning as i go.. This is my way! I am now designing a IDE for C++ (just fun, not professional) . I have the project almost ready, now i want to add some text highlighting function to the IDE. For example i want the IDE to recognize a predefined set of words and color them green,red. How do i do it?
You could use HTML, but you probably would be better off using the TextAction methods for a JEditorPane.
Another alternative is the StyledDocument interface.
Added because of the comment: You can use the StyledEditorKit class to see implementations of TextAction.
Here's Oracle's tutorial on How to Use Editor Panes and Text Panes.
I'm looking for a highly efficient Swing Java component which I can just plug into my application UI. I already tried using the classes within Swing such as JTextArea with no avail; they simply aren't high-performance enough and have any crippling drawbacks. Additionally, it'd be nice if it had standard console features such as scroll-lock, clear console, colours, and so on.
Edit: Forgot to say, this console will have a lot of debug information streaming into it, and it needs to be fully scrollable.
Cheers,
Chris
I fail to see what is wrong with using a JTextPane. It supports attributes which you can specify as each piece of text is added to the console. Clearing it is also obviously a no brainer. When added to a scroll pane it also supports scrolling.
You can add scroll locking by using Smart Scrolling.
Plus, it removes text too early and
No idea what that means as text is never removed unless you specifically remove it from the document.
doesn't allow the user to scroll while
input is being entered (afaik). The
effect is that you just see text
flashing while the number of rows
remains the same.
By default the text scrolls automatically as text is append to the document assuming the code is executed on the EDT. This scrolling can be controlled the the example provided in the link above.
Edit:
but I'd still like a library solution
I don't know of any
auto-colourise text coming from
different streams
The Message Console might give you some ideas.
(i.e., detect [error] prefix on a
line) and colourise lines based on
this)
This is easily done by adding a DocumentFilter to the Document of the text pane. You can add attributes as text is inserted into the Document.
Be sure that you read about the Event Dispatching Thread (EDT) in swing!
BTW: a simple search 'java swing console' will give you a lots of hints OR you could use/adapt the beanshell textfield which is a jtextfield too ...
I have a small Java application that has a JTextArea where the user enters text. I would like to add spell checking capabilities to this component similar to the way that Microsoft Word does it, i.e. misspelled words are underlined and a popup menu with corrections is displayed when the user right clicks on the underlined word. Are there any open source libraries for adding this functionality to JTextAreas?
You could implement your own spell checker using a dictionary (can get quite large depending on languages you support), then distance metrics are calculated from the words in the text box to the dictionary. Underlining can be done using font styling, there as applet based sample here.
Jaspell is a Java implementation of the popular Aspell. In there are some explantions of the search algorithms used.
As mentioned previously Jazzy is also great and IBM provides a nice tutorial.
I haven't tried this before, but I came across it a little while ago: http://sourceforge.net/projects/jazzy/