使用Cell渲染器获取Click JTable的位置

Question

I'm currently using a JTable in Java to display a large amount of text information, and as such have implemented text wrapping, using the following code:

MyCellRenderer mcr = new MyCellRenderer();
table.getColumnModel().getColumn(0).setCellRenderer(mcr);

class MyCellRenderer extends JTextArea implements TableCellRenderer {
  public MyCellRenderer() {
setLineWrap(true);
setWrapStyleWord(true);

 }

public Component getTableCellRendererComponent(JTable table, Object
    value, boolean isSelected, boolean hasFocus, int row, int column) {
setText(value.toString());
setSize(table.getColumnModel().getColumn(column).getWidth(),
        getPreferredSize().height);
if (table.getRowHeight(row) != getPreferredSize().height) {
        table.setRowHeight(row, getPreferredSize().height);
}
return this;
}
} 

However, when this is implemented, any attempt to detect the cell which is clicked, simply returns "-1" (out of bounds) as the point of click, I am using the following code to detect the click location:

table.addMouseListener(new java.awt.event.MouseAdapter() {

  public void mouseClicked(java.awt.event.MouseEvent e) {
    int row = table.rowAtPoint( e.getPoint() );
    int column = table.columnAtPoint( e.getPoint() );
  }
});
}

Is there any way, whilst maintaining the text wrapping, that I can text the cell which is clicked in the JTable?

Answer 1

My current situation requires a large amount of text information to be displayed next to [the] relevant data

Instead of a MouseListener , add a TableModelListener to your TableModel and update the Document model of an adjacent JTextComponent . In this related example , the TableModelListener updates the ListModel of an adjacent JList .

Alternatively, add a ListSelectionListener to your table's ListSelectionModel and update an adjacent component accordingly. In this related example using SINGLE_SELECTION , the ListSelectionListener updates an adjacent JButton .

Alternatively, look at this TablePopupEditor , which uses a JButton as a TableCellEditor . The button's ActionListener evokes a popup modal JDialog containing a JTextArea .

Answer 2

The following code gives the above functionality, (it ignores all wrapping cell renderers) table.addMouseListener(new java.awt.event.MouseAdapter() {

  public void mouseClicked(java.awt.event.MouseEvent e) {
    JTable target = (JTable)e.getSource();
    int row = target.getSelectedRow();
    int column = target.getSelectedColumn();
    if((row >=0) && (column >=0)){
      //Stuff
    }

  }
});