jTable选定行的网格线

Question

I have a jTable set so that it is read only, and selection is done by single row only.

However, when the user selects a row and the row is painted, the jTable's vertical grid lines between columns are removed, causing a single horizontal block of colour, instead of blocks of colour in each cell.

How can I get the selected row to show the vertical lines between each cell in adjacent columns?

Answer 1

Have you ensured that myTable.setShowGrid(true) , myTable.setShowVerticalLines(true) have been called? What's your grid colour, and could it be the same as the selection background colour?

Update: I used the following simple Jython script to create a read-only table:

from javax.swing import *
from java.awt import *
from javax.swing.table import DefaultTableModel, DefaultTableCellRenderer

class MyTableModel(DefaultTableModel):
    def isCellEditable(self, row, col):
        return False

class UnfocusableRenderer(DefaultTableCellRenderer):
    def getTableCellRendererComponent(self, table, value, isSelected, hasFocus, row, col):
        return DefaultTableCellRenderer.getTableCellRendererComponent(self, table, value, isSelected, False, row, col)

if __name__ == '__main__':
    frame = JFrame("Read-only JTable")
    frame.setSize(400, 150)
    frame.setLayout(BorderLayout())
    tableData = [
      ['', ''],
      ['', ''],
    ]
    colNames = ('Title 1','Title 2')
    dataModel = MyTableModel(tableData, colNames)
    table = JTable(dataModel)
    r = UnfocusableRenderer()
    for colindex in (0, 1):
        tc = table.columnModel.getColumn(colindex)
        tc.cellRenderer = r

    scrollPane = JScrollPane()
    scrollPane.setPreferredSize(Dimension(370,106))
    scrollPane.getViewport().setView(table)

    panel = JPanel()
    panel.add(scrollPane)
    panel.background = Color.blue.darker()

    frame.add(panel, BorderLayout.CENTER)
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE)
    frame.setVisible(True)

This is the screenshot when I select a row:

As this is showing the gridlines, could it be something to do with your renderers, colours or resources?

Answer 2

Did you implement your own cellrenderer ?

If you did make sure you still set a border in your

 public Component getTableCellRendererComponent(...)

method