[PT선생님][100]javax.accessibility.AccessibleTextSequence 알아보기

javax.accessibility.AccessibleTextSequence는 텍스트 접근성을 구현하는 데 사용되는 Java 클래스 중 하나입니다
이 클래스는 텍스트 블록의 내용과 스타일을 나타내는 데 사용됩니다
특히, AccessibleTextSequence 클래스는 다음과 같은 메서드를 제공합니다.

- `getStartIndex()` : 이 텍스트 블록의 시작 인덱스를 반환합니다.
- `getEndIndex()` : 이 텍스트 블록의 끝 인덱스를 반환합니다.
- `getText()` : 이 텍스트 블록의 텍스트 내용을 반환합니다.
- `getAccessibleText()` : 이 텍스트 블록의 AccessibleText 객체를 반환합니다.
- `toString()` : 이 텍스트 블록을 문자열로 반환합니다.

AccessibleTextSequence 클래스는 Java Swing 컴포넌트에서 접근성을 구현하는 데 사용됩니다
예를 들어, JTextComponent는 AccessibleTextSequence 객체의 목록으로 이루어진 AccessibleText 객체를 사용하여 텍스트 접근성을 구현합니다
AccessibleTextSequence 객체는 텍스트 블록의 내용과 스타일을 나타내는 데 사용되며, 이를 통해 텍스트 접근성 클라이언트가 컴포넌트의 텍스트를 읽고 탐색할 수 있습니다.

아래는 AccessibleTextSequence 객체를 사용하여 텍스트 접근성을 구현하는 JTextComponent의 예제 코드입니다.

 

import javax.swing.*;
import javax.accessibility.*;

public class AccessibleTextExample {

    public static void main(String[] args) {
        JFrame frame = new JFrame("Accessible Text Example");
        JTextArea textArea = new JTextArea("Hello, world!");
        frame.getContentPane().add(textArea);
        frame.pack();
        frame.setVisible(true);

        AccessibleContext context = textArea.getAccessibleContext();
        AccessibleText text = context.getAccessibleText();
        AccessibleTextSequence[] sequences = text.getCharacterAttributeSequences(0, text.getCharCount(), new AccessibleAttribute[] { AccessibleAttribute.FONT });
        
        for (AccessibleTextSequence sequence : sequences) {
            System.out.println("Text content: " + sequence.getText());
            System.out.println("Font: " + sequence.getAttribute(AccessibleAttribute.FONT));
        }
    }
}

위의 예제 코드에서는 JFrame에 JTextArea를 추가하여 텍스트를 표시하고, AccessibleContext를 사용하여 AccessibleText 객체를 가져온 다음, getCharacterAttributeSequences() 메서드를 사용하여 AccessibleTextSequence 객체의 배열을 가져옵니다
마지막으로 AccessibleTextSequence 객체의 getText() 및 getAttribute() 메서드를 사용하여 텍스트 내용과 스타일을 출력합니다.

AccessibleTextSequence 클래스는 텍스트 접근성을 구현하는 데 필수적인 클래스 중 하나이며, Java Swing 컴포넌트에서 텍스트 접근성을 구현하는 데 사용됩니다.
AccessibleTextSequence 클래스는 AccessibleText 인터페이스를 구현하며, 텍스트 블록의 내용과 스타일을 AccessibleTextSequence 객체로 나타냅니다
이 클래스는 특정 위치에서 시작하는 AccessibleText 객체의 일부를 표현합니다
AccessibleTextSequence 객체는 텍스트 블록의 시작 인덱스, 끝 인덱스, 텍스트 내용 및 AccessibleText 객체로 구성됩니다.

AccessibleTextSequence 클래스의 생성자는 다음과 같습니다.

- `AccessibleTextSequence(AccessibleText text, int startIndex, int endIndex)` : 지정된 시작 및 끝 인덱스의 AccessibleText 일부를 나타내는 AccessibleTextSequence 객체를 생성합니다.

AccessibleTextSequence 클래스는 다음과 같은 메서드를 제공합니다.

- `getText()` : 이 AccessibleTextSequence 객체의 텍스트 내용을 반환합니다.
- `getStartIndex()` : 이 AccessibleTextSequence 객체의 시작 인덱스를 반환합니다.
- `getEndIndex()` : 이 AccessibleTextSequence 객체의 끝 인덱스를 반환합니다.
- `getAccessibleText()` : 이 AccessibleTextSequence 객체의 AccessibleText 객체를 반환합니다.
- `toString()` : 이 AccessibleTextSequence 객체를 문자열로 반환합니다.

AccessibleTextSequence 클래스는 Java Swing의 JTextComponent 및 JEditorPane 등의 텍스트를 표시하는 컴포넌트에서 접근성을 구현하는 데 사용됩니다
이 클래스는 AccessibleText 객체의 일부를 나타내며, 텍스트 블록의 시작 및 끝 인덱스, 텍스트 내용 및 AccessibleText 객체로 구성됩니다.

아래는 AccessibleTextSequence 객체를 사용하여 JTextComponent에서 접근성을 구현하는 예제 코드입니다.

 

import javax.swing.*;
import javax.accessibility.*;

public class AccessibleTextExample {

    public static void main(String[] args) {
        JFrame frame = new JFrame("Accessible Text Example");
        JTextArea textArea = new JTextArea("Hello, world!");
        frame.getContentPane().add(textArea);
        frame.pack();
        frame.setVisible(true);

        AccessibleContext context = textArea.getAccessibleContext();
        AccessibleText text = context.getAccessibleText();
        AccessibleTextSequence sequence = new AccessibleTextSequence(text, 0, text.getCharCount());
        
        System.out.println("Text content: " + sequence.getText());
        System.out.println("Start index: " + sequence.getStartIndex());
        System.out.println("End index: " + sequence.getEndIndex());
        System.out.println("Accessible text: " + sequence.getAccessibleText());
    }
}

위의 예제 코드에서는 JFrame에 JTextArea를 추가하여 텍스트를 표시하고, AccessibleContext를 사용하여 AccessibleText 객체를 가져온 다음, AccessibleTextSequence 객체를 생성합니다
마지막으로 AccessibleTextSequence 객체의 getText(), getStartIndex(), getEndIndex(), getAccessibleText() 메서드를 사용하여 텍스트 내용과 인덱스를 출력합니다.

AccessibleTextSequence 클래스는 Java Swing의 텍스트를 표시하는 컴포넌트에서 접근성을 구현하는 데 필수적인 클래스 중 하나입니다
이전에 제공한 예제 코드에서 이미 AccessibleTextSequence 객체를 사용하는 방법을 보여주었습니다
이번에는 AccessibleTextSequence 객체를 사용하여 텍스트 블록의 일부를 선택하고, 선택한 텍스트 블록의 정보를 출력하는 예제 코드를 제공하겠습니다.

 

import javax.swing.*;
import javax.accessibility.*;

public class AccessibleTextSelectionExample {

    public static void main(String[] args) {
        JFrame frame = new JFrame("Accessible Text Selection Example");
        JTextArea textArea = new JTextArea("This is a sample text.");
        frame.getContentPane().add(textArea);
        frame.pack();
        frame.setVisible(true);

        AccessibleContext context = textArea.getAccessibleContext();
        AccessibleText text = context.getAccessibleText();

        // Select a portion of the text
        int startIndex = 2;
        int endIndex = 8;
        text.addSelection(startIndex, endIndex);

        // Get the selected text
        AccessibleTextSequence selectedText = new AccessibleTextSequence(text, startIndex, endIndex);
        System.out.println("Selected text content: " + selectedText.getText());
        System.out.println("Selected text start index: " + selectedText.getStartIndex());
        System.out.println("Selected text end index: " + selectedText.getEndIndex());
        System.out.println("Accessible text: " + selectedText.getAccessibleText());
    }
}

위의 예제 코드에서는 JTextArea를 사용하여 텍스트를 표시하고, AccessibleContext를 사용하여 AccessibleText 객체를 가져온 다음, addSelection() 메서드를 사용하여 텍스트 블록의 일부를 선택합니다
마지막으로 AccessibleTextSequence 객체를 사용하여 선택한 텍스트 블록의 정보를 출력합니다.

이 예제 코드에서는 startIndex와 endIndex 변수를 사용하여 텍스트 블록을 선택했습니다
startIndex는 선택한 텍스트 블록의 시작 인덱스이며, endIndex는 선택한 텍스트 블록의 끝 인덱스입니다
AccessibleTextSequence 생성자를 사용하여 선택한 텍스트 블록을 나타내는 AccessibleTextSequence 객체를 생성합니다
마지막으로, getText(), getStartIndex(), getEndIndex(), getAccessibleText() 메서드를 사용하여 선택한 텍스트 블록의 정보를 출력합니다.