RE: Change the background colour of only one cell of a GtkTreeView.

["Freddie Unpenstein" <fredderic excite com>]

> I'm tying to change the background colour of an independant cell
> of a GtkTreeView.  I have utility functions to change the colour
> of a row, adding a new column to the GtkTreeModeland use it to
> set the row colour.  When i created the GtkTreeViewColumns, i've
> created a new GtkCellRendererText object for each column.
> Iterating between columns, i could change the colour of cells in
> the same column, but the last modification will be the final
> colour. My problem is that i want to change the clour of a unique
> cell.

As I understand it, you basically have two options;

1) an extra data field containing a colour can be linked to the colour setting of a column.  Then for each cell rendered in that column, the relevant field in the data set will be checked to obtain the colour to use for that cell.  Unfortunately, if you need to independantly control the colour of cells in three different columns, that would mean adding three extra colour fields to the data set.  If you've got a large number of rows to display, that could prove to be quite a few extra fields.

2) the other option, probably the better one, is to attach a function which is called for each row that gets rendered.  This function is then free to modify the cell renderer settings however it wishes (such as changing the colour) just before the cells for that column get rendered.  So by reconfiguring the colour of each column prior to the rendering of each row, you have compleate (and individual) control over each and every cell in the table.


Fredderic

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