Java JTextField isInHighlight(MouseEvent e, JTextField label, Highlighter h)

Description

Returns true if the given mouse event occurred within a highlight h on label.

License

Open Source License

Declaration

public static boolean isInHighlight(MouseEvent e, JTextField label,
        Highlighter h) 

Method Source Code

//package com.java2s;

import java.awt.FontMetrics;
import java.awt.event.MouseEvent;
import javax.swing.JTextField;

import javax.swing.text.Highlighter;
import javax.swing.text.Highlighter.Highlight;

public class Main {
    /**/*from w  w  w. j  ava  2s. c  o m*/
     * Returns true if the given mouse event occurred within a highlight h on label.
     */
    public static boolean isInHighlight(MouseEvent e, JTextField label,
            Highlighter h) {
        Highlight[] hls = h.getHighlights();
        if (hls == null || hls.length == 0)
            return false;
        Highlight hl = hls[0];
        FontMetrics fm = label.getFontMetrics(label.getFont());
        int offset = getCharOffset(fm, label.getText(), e.getX());
        return hl.getStartOffset() <= offset && offset < hl.getEndOffset();
    }

    private static int getCharOffset(FontMetrics fm, String characters,
            int xPos) {
        StringBuilder s = new StringBuilder();
        char[] sArray = characters.toCharArray();
        int i;
        for (i = 0; i < characters.length()
                && fm.stringWidth(s.toString()) < xPos; i++) {
            s.append(sArray[i]);
        }
        return i;
    }
}

Related

1. doAction(JTextField textField)
2. fieldSetErrorVisual(final JTextField field)
3. implyDisabled(final JCheckBox checked, final boolean checkedState, final JTextField changed)
4. isActiveComponents(JTextField... textFields)
5. isEmptyStr(javax.swing.JTextField input)
6. isJTextFieldNotEmpty(javax.swing.JTextField field)
7. isTelpValid(JTextField field)
8. IsTextFieldEmpty(javax.swing.JTextField tf)
9. isTextFieldModified(JTextField textField, String originalValue)