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https://issues.apache.org/jira/browse/PIVOT-841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sandro Martini updated PIVOT-841:
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Assignee: (was: Noel Grandin)
> TextArea - ParagraphListener - textInserted method problem - count is equal 0
> -----------------------------------------------------------------------------
>
> Key: PIVOT-841
> URL: https://issues.apache.org/jira/browse/PIVOT-841
> Project: Pivot
> Issue Type: Bug
> Components: wtk
> Affects Versions: 2.0.1, 2.0.2
> Environment: Windows 7, Java 1.7.0_01
> Reporter: Imbue Lab
> Priority: Minor
> Fix For: 2.5
>
>
> I use TextArea and want to listen to the inserted text (simply by using
> keyboard). I do it using ParagraphListener. Every time new character is typed
> a listener's method textInserted(Paragraph paragraph, int index, int count)
> is invoked. Everything works fine till I press ENTER. In that case
> textInserted method is invoked with "count" parameter set to 0. Does it make
> any sense?
> I've prepared the simplest example I could imagine, it looks ugly, but it's
> simple and works :-)
> Please take a look on the code below and description after it:
> import org.apache.pivot.collections.Map;
> import org.apache.pivot.wtk.Application;
> import org.apache.pivot.wtk.DesktopApplicationContext;
> import org.apache.pivot.wtk.Display;
> import org.apache.pivot.wtk.TextArea;
> import org.apache.pivot.wtk.TextArea.Paragraph;
> import org.apache.pivot.wtk.TextArea.ParagraphListener;
> import org.apache.pivot.wtk.TextAreaContentListener;
> import org.apache.pivot.wtk.Window;
> public class TextAreaListenersExample extends Application.Adapter {
> @Override
> public void startup(Display display, Map<String, String> properties) throws
> Exception {
> TextArea textArea = new TextArea();
> textArea.setText("abcxyz");
> //---
> final ParagraphListener paragraphListener = new
> ParagraphListener.Adapter() {
> @Override
> public void textInserted(Paragraph paragraph, int index, int count) {
> System.out.println("Text inserted\n\tparagraph content: '" +
> paragraph.getCharacters() + "" + "'\n\tindex: " + index + "\n\tcount: " +
> count);
> }
> @Override
> public void textRemoved(Paragraph paragraph, int index, int count) {
> System.out.println("Text removed\n\tparagraph content: '" +
> paragraph.getCharacters() + "'\n\tindex: " + index + "\n\tcount: " + count);
> }
> };
>
>
> textArea.getParagraphs().get(0).getParagraphListeners().add(paragraphListener);
>
> textArea.getTextAreaContentListeners().add(new
> TextAreaContentListener.Adapter() {
> @Override
> public void paragraphInserted(TextArea textArea, int index) {
> Paragraph paragraph = textArea.getParagraphs().get(index);
>
> System.out.println("Paragraph inserted\n\tparagraph content: '" +
> paragraph.getCharacters() + "'\n\tindex: " + index);
>
> paragraph.getParagraphListeners().add(paragraphListener);
> }
> });
>
> Window window = new Window(textArea);
>
> window.open(display);
> }
> public static void main(String[] args) throws Exception {
> DesktopApplicationContext.main(TextAreaListenersExample.class, new
> String[0]);
> }
> }
> When you place carret after the "c" character in the TextArea and press
> ENTER, you get following output:
> Text removed
> paragraph content: 'abc' <- text 'xyz' was removed from the first
> paragraph 'abcxyz'
> index: 3
> count: 3
> Text inserted
> paragraph content: 'abc' <- first paragraph insertion, probably it was
> ENTER
> index: 3
> count: 0 <- count is 0!!!
> Paragraph inserted
> paragraph content: 'xyz' <- new paragraph is inserted together with the
> content
> index: 1
> Text inserted
> paragraph content: 'xyz' <- I don't know why insertion happens here
> index: 0
> count: 0 <- again, count is 0!!!
> One more thing, maybe it would be better to have paragraph insertion without
> any content (not like it is now), and after that text insertion with the all
> content of the new created paragraph, it would be more intuitive and easier
> to handle, I really struggle with that now. Can you consider that?
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