Coloring a Row in an NSTableView

What I am 开发者_如何学JAVAlooking to do is set the background color of the selected row in an NSTableView when a I button is clicked. I've seen other cases where people have used tableView:willDisplayCell:forTableColumn:row: and setBackgroundColor: but I don't think that will work in my situation where I want it to happen when a button is clicked.

I know that I can find the selected row with NSTableView's selectedRow method and set the Background color for a cell with setBackgroundColor:, but what I don't know how to do is get from a NSInteger for the selected row to an NSCell to set the background color of.

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NSTableView uses only one instance of NSCell for each column. When drawing the contents, the cell is updated for each row. That’s why there’s no method to get a cell for a specified row—you have to modify the cell in tableView:willDisplayCell:forTableColumn:row:.

You can tell the table view to update only one row using reloadDataForRowIndexes:columnIndexes:.

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To set background color to NSTableview Row

  - (void)tableView:(NSTableView *)tableView willDisplayCell:(id)cell1 forTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row 
{
      if(row==1)
         [cell1 setBackgroundColor:[NSColor redColor]];
      else if(row==2||row==3)
         [cell1 setBackgroundColor:[NSColor greenColor]];
      else
         [cell1 setBackgroundColor:[NSColor clearColor]];
}

using this method we can give different color to each row.. Make sure drawsBackground is enabled on the NSTextFieldCell otherwise this will have no effect!

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If you simply want to change the color of an entire selected row:

NSInteger selectedRow = [self.nsTableView selectedRow];
NSTableRowView* rowView = [self.nsTableView rowViewAtRow:selectedRow makeIfNecessary:NO];
[rowView setBackgroundColor:[NSColor blackColor]];

glhf