Re: [gtkmm] Setting the background color of a specific cell in a Gtk::Treeview

[Liza Klerck <liza trdlnk com>]

I understand that I have to change the cellrender for that cell but the problem
is that I don't know how to get to the CellRenderer - what I have is a TreeViewColumn
and a TreeModelRow and from those two I need to get at the CellRenderer.
Any ideas ?

//------------------
Here is some code to show hot to change the color for an entire column:
class ModelColumns : public Gtk::TreeModel::ColumnRecord
{
public:
    ModelColumns()  {   add(m_col_i);    add(m_col_visible);   
  }
  Gtk::TreeModelColumn<int> m_col_i;
  Gtk::TreeModelColumn<bool> m_col_visible;
};

ModelColumns m_Columns;
Gtk::TreeView m_TreeView;
Glib::RefPtr<Gtk::TreeStore> m_refTreeModel; 

m_refTreeModel = Gtk::TreeStore::create(m_Columns);
m_TreeView.set_model(m_refTreeModel);

// Add a row with data
Gtk::TreeModel::Row row = *(m_refTreeModel->append());
row[m_Columns.m_col_i] = 99;
row[m_Columns.m_col_visible] = false;

// Append the column
int cols_count  = m_TreeView.append_column("i", m_Columns.m_col_i);
Gtk::TreeViewColumn* pColumn = m_TreeView.get_column(cols_count-1);
if(pColumn)
{
    // Set the background color for the entire column
   Gtk::CellRendererText* pRenderer = static_cast<Gtk::CellRendererText*>(pColumn->get_first_cell_renderer());
   Gdk::Color col("red");
   renderer->property_background_gdk().set_value(col); 
   pColumn->add_attribute(renderer->property_visible(), m_Columns.m_col_visible); 
}


Jarek Dukat wrote:
> On Thu, 2003-01-09 at 17:56, Liza Klerck wrote:
> > I have a [Gtk::TreeViewColumn] and a [Gtk::TreeModel::Row] - how do I 
> > get to the cellrenderer in order to set the background color of this 
> > specific cell for this column and row in a Gtk::Treeview ? I need to set 
> > and reset background colors for specific cells on certain events. I 
> > understand how to set the background color of an entire column but need 
> > to know how to set it for individual cells.
> >     
>
> For single cell you must change background color property of the cell
> renderer inside that cell.
> Could you please tell us how you do it for entire column?
>
>