Java JTextComponent Column getDocumentPosition(JTextComponent editor, int line, int column)

Description

Get the closest position within the document of the component that has given line and column.

License

Apache License

Parameter

Parameter	Description
editor	a parameter
line	a parameter
column	a parameter

Return

the closest positon for the text component at given line and column

Declaration

public static int getDocumentPosition(JTextComponent editor, int line,
        int column) 

Method Source Code

//package com.java2s;
/*/*ww  w  . j av  a2s.  c o  m*/
 * Copyright 2008 Ayman Al-Sairafi ayman.alsairafi@gmail.com
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License 
 *       at http://www.apache.org/licenses/LICENSE-2.0 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License.  
 */

import java.awt.Point;

import javax.swing.text.JTextComponent;

public class Main {
    /**
     * Get the closest position within the document of the component that
     * has given line and column.  
     * @param editor
     * @param line
     * @param column
     * @return the closest positon for the text component at given line and
     * column
     */
    public static int getDocumentPosition(JTextComponent editor, int line,
            int column) {
        int lineHeight = editor.getFontMetrics(editor.getFont())
                .getHeight();
        int charWidth = editor.getFontMetrics(editor.getFont()).charWidth(
                'm');
        int y = line * lineHeight;
        int x = column * charWidth;
        Point pt = new Point(x, y);
        int pos = editor.viewToModel(pt);
        return pos;
    }
}

Related

1. getColumn(int pos, JTextComponent editor)
2. getColumn(JTextComponent editor, int pos)
3. getColumnAtPosition(JTextComponent editor, int caretPosition)
4. getColumnNumber(JTextComponent editor, int pos)
5. setCaretPosition(JTextComponent target, int line, int column)