JTable Clickable Column Sorting: Sorting sorts content of cells, but doesn't update cell formatting?
Solution 1
you have to convert row index from View to the Model
int modelRow = convertRowIndexToModel(row);
Solution 2
You can enable table sorting by clicking on header using this
table.setAutoCreateRowSorter(true);
for more information visit this site http://www.codejava.net/java-se/swing/6-techniques-for-sorting-jtable-you-should-know
Panky
Updated on September 12, 2020Comments
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Panky over 3 years
I have a sortable
JTable
set up to use a custom extension of theAbstractTableModel
. However, some behavior of this table is what I expected, and I would love some advice on how to figure this out.I have the JTable set up to be sortable using:
thisJTable.setAutoCreateRowSorter(true);
This allows me to sort the table by clicking on the column headers as expected.
However, I find that when I sort the table by clicking on the column headers, the formatting (background and foreground color) of my rows are not sorted as well.
I had set up those rows to be color-coded based on the values they contain. When I sort by column header the formatting at a given row NUMBER stays the same (although the content that was previously in that row moved).
The color of the row is set by overriding the default
prepareRenderer
call for the JTable:thisTable = new JTable(thisModel){ //Set up custom rendering - Sets background color of row to correct value public Component prepareRenderer(TableCellRenderer renderer, int row, int column) { Component c = super.prepareRenderer(renderer, row, column); CustTableModel thisModel = (CustTableModel) getModel(); c.setBackground(thisModel.getRowBackgroundColor(row)); c.setForeground(thisModel.getRowForeColor(row)); return c; } };
Is there a better/different way to approach this?
Should I be using a different method to do my rendering, a method which would update the rendering of the JTable on a sort?
Or do I want to look into writing my own sorting method?
Solution (Thanks mKorbel!)
I thought I would post my solution, since I had to play with this a bit since I wasn't sure if the new index would be passed to the prepareRenderer as well.
thisTable = new JTable(thisModel){ //Set up custom rendering - Sets background color of row to correct value public Component prepareRenderer(TableCellRenderer renderer, int row, int column) { int viewIdx = row; int modelIdx = convertRowIndexToModel(viewIdx); Component c = super.prepareRenderer(renderer, row, column); CustTableModel thisModel = (CustTableModel) getModel(); c.setBackground(thisModel.getRowBackgroundColor(modelIdx)); c.setForeground(thisModel.getRowForeColor(modelIdx)); return c; } };
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kleopatra about 12 yearsdarn, you beat me (still fighting my new keyboard:-) +1, of course
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Panky about 12 yearsAwesome! Thanks for the tip, I had been looking at the Javadoc for JTable for a while but didn't stumble upon this somehow.
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trashgod about 12 years@Panky: "When using a sorter, always remember to translate cell coordinates."—Sorting and Filtering; sadly, I've had to look it up more than once. :-)
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Mijo almost 3 yearsI can't believe that this answer is not the accepted answer. So elegant and simple. Thanks