Scroll a Cell to the Center of a JTable in Java
Description
The following code shows how to scroll a Cell to the Center of a JTable.
Example
import java.awt.BorderLayout;
import java.awt.Rectangle;
// w ww. jav a 2 s.c o m
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JViewport;
public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Object rowData[][] = { { "Row1-Column1", "Row1-Column2", "Row1-Column3" },
{ "Row2-Column1", "Row2-Column2", "Row2-Column3" },
{ "Row3-Column1", "Row3-Column2", "Row3-Column3" }};
Object columnNames[] = { "Column One", "Column Two", "Column Three" };
final JTable table = new JTable(rowData, columnNames);
JScrollPane scrollPane = new JScrollPane(table);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
int rowIndex = 1;
int vColIndex = 2;
scrollToCenter(table, rowIndex, vColIndex);
}
public static void scrollToCenter(JTable table, int rowIndex, int vColIndex) {
if (!(table.getParent() instanceof JViewport)) {
return;
}
JViewport viewport = (JViewport) table.getParent();
Rectangle rect = table.getCellRect(rowIndex, vColIndex, true);
Rectangle viewRect = viewport.getViewRect();
rect.setLocation(rect.x - viewRect.x, rect.y - viewRect.y);
int centerX = (viewRect.width - rect.width) / 2;
int centerY = (viewRect.height - rect.height) / 2;
if (rect.x < centerX) {
centerX = -centerX;
}
if (rect.y < centerY) {
centerY = -centerY;
}
rect.translate(centerX, centerY);
viewport.scrollRectToVisible(rect);
}
}
The code above generates the following result.
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