How to make Scroll pane static?

问题

Observation::

Whenever the user reaches the last cell in the table and press Tab key, the focus is shifted to the first cell i.e the top the table.

Brought the table view back to the last cell, by using the function table.scrollRectToVisible(rect), but due this there is movement and looks like there is a false change in the table values.

The Scenario :: If I have make the make Scroll pane Static at particular position, so that I can control the movement. How can make this possible..

Thank You in Advance...

回答1:

The basic approach is to wrap the table's default navigation action into a custom Action which checks for the current cell: if it's the last, do nothing otherwise execute the wrapped action

code example:

    Object key = table.getInputMap(JTable.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
        .get(KeyStroke.getKeyStroke("ENTER"));
    final Action action = table.getActionMap().get(key);
    Action custom = new AbstractAction("wrap") {

        @Override
        public void actionPerformed(ActionEvent e) {
            // implement your prevention logic
            // here: don't perform if the current cell focus is the very cell of the table
            int row = table.getSelectionModel().getLeadSelectionIndex();
            if (row == table.getRowCount() - 1) {
                int column = table.getColumnModel().getSelectionModel().getLeadSelectionIndex();
                if (column == table.getColumnCount() -1) {
                    // if so, do nothing and return
                    return;
                }
            }
            // if not, call the original action
            action.actionPerformed(e);
        }

    };
    table.getActionMap().put(key, custom);

来源：https://stackoverflow.com/questions/7551502/how-to-make-scroll-pane-static

标签

java

swing

jtable