CODEWITHSUNDEEP
javaswingjtablerowmouselistener
robert
robert

Reputation: 249

Unselect JTable row when row index < 0

My question is really simple, I just don't know how to query this on google.

What I want is just to print the selected row index when I click a row on a JTable.

sample

The problem is if I click a valid row index (which is index >= 0 && index < rowCount) and then I click outside of the valid rows on lower part of the table which has no rows (obviously it is now index < 0) the row index that is printed is still the last valid row index that I clicked. What I want for this is to print the "No row selected" and clears the row selection when I clicked on the lower blank part of the table which has no rows.

enter image description here

(I am already clicking outside of the rows here on the lower blank part of the table)

Here is my codes:

JTable table = new JTable(new MyTableModel());
table.setFillsViewportHeight(true);

table.addMouseListener(new MouseAdapter() {
    @Override
    public void mousePressed(MouseEvent e) {
        int rowIndex = table.getSelectedRow();
        if(rowIndex < 0) {
            System.out.println("No row selected");
            table.clearSelection();
        } else {
            System.out.println("Row " + rowIndex + " selected");
        }
    }
});

The only time that this simple program works the way I want it to do is when I set the setFillsViewportHeight to false or just omit it since it is false by default.

So how can I do this while the table.setFillsViewportHeight is set to true?

Upvotes: 0

Views: 355

Answers (1)

sorifiend
sorifiend

Reputation: 6307

You can use table.rowAtPoint(e.getPoint()) to get the clicked row. It will return -1 if the selection is not valid (When you click below the table):

public void mousePressed(MouseEvent e) {
    //Updated to use rowAtPoint
    int rowIndex = table.rowAtPoint(e.getPoint());

    //Existing code
    if(rowIndex < 0) {
        System.out.println("No row selected");
        table.clearSelection();
    } else {
        System.out.println("Row " + rowIndex + " selected");
    }
}

Upvotes: 3

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