Java JTable Row Visible ensureRowVisible(JTable table, int row)

Description

To make sure the row is visible.

License

Open Source License

Parameter

Parameter	Description
table	a parameter
row	a parameter

Declaration

public static void ensureRowVisible(JTable table, int row) 

Method Source Code

//package com.java2s;
import javax.swing.*;

import java.awt.*;

public class Main {
    /**// w  w w  .j a  v a2 s  .  co m
     * To make sure the row is visible. If the table's horizontal scroll bar is visible, the method will not change the
     * horizontal scroll bar's position.
     *
     * @param table
     * @param row
     */
    public static void ensureRowVisible(JTable table, int row) {
        Rectangle r = table.getVisibleRect();
        // Hack! make above and below visible if necessary
        // TODO: how to center it or make it the first?
        Rectangle rMid = table.getCellRect(row, 0, true);
        Rectangle rBefore = null, rAfter = null;
        if (row < table.getModel().getRowCount() - 1)
            rAfter = table.getCellRect(row + 1, 0, true);
        if (row > 0)
            rBefore = table.getCellRect(row - 1, 0, true);

        int yLow = (int) rMid.getMinY();
        int yHi = (int) rMid.getMaxY();
        int xLow = r.x;
        int xHi = r.x + r.width;

        if (rBefore != null)
            yLow = (int) rBefore.getMinY();

        if (rAfter != null) {
            yHi = (int) rAfter.getMaxY();
        }

        Rectangle rScrollTo = new Rectangle(xLow, yLow, xHi - xLow, yHi
                - yLow);
        if (!r.contains(rScrollTo) && rScrollTo.height != 0) {
            table.scrollRectToVisible(rScrollTo);
        }
    }
}

Related

1. computeVisibleRowsCount(JTable table)
2. ensureRowVisible(JTable table, int row)
3. getFirstVisibleRow(JTable p_Table)
4. getFirstVisibleRowIndex(JTable table)
5. getLastVisibleRow(JTable p_Table)