Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.awt.Rectangle;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class Main {
    /**
     * Scrolls a JScrollPane to a position in the JTextArea.
     * @param jScrollPane
     * @param jTextArea
     * @param position
     */
    public static void scrollToPosition(JScrollPane jScrollPane, JTextArea jTextArea, int position) {
        jScrollPane.getVerticalScrollBar().setValue((getLineNumber(jTextArea, position) - 3) * 18);
    }

    /**
     * Source: http://stackoverflow.com/questions/102171/method-that-returns-the-line-number-for-a-given-jtextpane-position
     * Returns an int containing the wrapped line index at the given position
     * @param component JTextPane
     * @param int pos
     * @return int
     */
    public static int getLineNumber(JTextArea component, int pos) {
        int posLine;
        int y = 0;

        try {
            Rectangle caretCoords = component.modelToView(pos);
            y = (int) caretCoords.getY();
        } catch (Exception ex) {
        }

        int lineHeight = component.getFontMetrics(component.getFont()).getHeight();
        posLine = (y / lineHeight);
        return posLine;
    }
}