I have an application that works with a JTable
, and in this JTable
, I want each cell to have both an ImageIcon
and some text.
I see at this link (https://docs.oracle.com/javase/tutorial/uiswing/components/table.html#editrender), JTable
supports ImageIcon
OR text, but seemingly not both at the same time.
I also see that on the bullet for ImageIcon
, it says rendered by a centered label.
Well, I know for a fact that I can put both an ImageIcon
and text together on the same JLabel
-- I am doing that already for a different part of my application.
How do I get access to that JLabel
, so that I can put some text alongside that icon?
I have been informed that my question is actually a duplicate. Here is a link to the original question.
https://stackoverflow.com/a/52065145/131872
But I can provide a bit more detail to how I implemented it for me.
In my case, I want to store both an ImageIcon
and some text. So, the first thing I should do is create a data type that contains both of these elements.
record TextIcon(String text, ImageIcon icon) {}
Next, I need to create a renderer that can render this data type. To do that, I will extend the DefaultTableCellRenderer
.
final class MyTableCellRenderer extends DefaultTableCellRenderer
{
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
{
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (value instanceof TextIcon textIcon)
{
this.setText(textIcon.text());
this.setIcon(textIcon.icon());
}
return this;
}
}
Doing it this way is nice because, now, I don't need to specify which column this applies to. I can apply this renderer to all of my columns, and then if they are not a TextIcon
, they will just do the default rendering they would have gotten.
Alternatively, if I need to create another data type for my table, I can just add another if statement to this method. This strategy is a powerful way to add custom rendering to your table.
Now that I have my renderer, I will add it to all of my columns. Here is the easiest way to do it.
table.setDefaultRenderer(Object.class, new MyTableCellRenderer());
I use Object.class
because I want this renderer to be used for all columns. Since Object
is a parent to all reference data types, then doing this essentially means that I am applying this renderer to all of my columns.
After that, I just continue as is, and things just work!