CODEWITHSUNDEEP
searchjavafxscroll
Marta
Marta

Reputation: 183

Searching a text and automatically scroll down

I have to code a full text search. If the word is found it's highlighted and if I press the 'Next' button the next word in the text is highlighted and so on. But the challange is, that the words further down in the text have to be highlighted in the middle of the window. Means, the text has to scroll automatically to the highlighted word. I read a few posts on Stackoverflow but I couldn't get it to work.

This is my find methode: 

   findButton.addEventHandler(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent e) {
                errorText.setText("");
                if (textFieldFind.getText() != null) {
                    findWord = Pattern.compile(textFieldFind.getText(), Pattern.CASE_INSENSITIVE);
                    matcher = findWord.matcher(textArea.getText());
                    if (matchCase.isSelected()) {
                        findWord = Pattern.compile(textFieldFind.getText());
                        matcher = findWord.matcher(textArea.getText());
                    }
                    if (matcher.find()) {
                        textArea.selectRange(matcher.start(), matcher.end());
                        textArea.scr
                    } 
                } else {
                    errorText.setText("Missing search key");
                } 
            }
        });

This is my 'Next' button methode:

      nextButton.addEventHandler(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent e) {
                if (matcher.find()) {
                    scroll.setVvalue(0.5); 
                    textArea.selectRange(matcher.start(), matcher.end());
                }
            }
        });

Upvotes: 1

Views: 340

Answers (1)

SedJ601
SedJ601

Reputation: 13859

Try something like this:

Platform.runLater(()->textArea.setScrollTop(matcher.start()));

This worked for me

Upvotes: 1

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