Coloring a GTK::TreeView Cell

[Allen <allen saucier cas-inc com>]

I have figured out the way to color a cell:

1. Have a Model Column Class, such as -  class CAllTreeModelColumns : 
public Gtk::TreeModel::ColumnRecord
   CAllTreeModelColumns    atmcAllTreeModelColumns;  // w/in the Object 
so that it's easy to access

2. Have these 2 types of columns in it:
   Gtk::TreeModelColumn<std::string>               m_colThreat1;        
               ///< Threat Number associated with Sensor or Gun
   Gtk::TreeModelColumn<Glib::RefPtr<Gdk::Pixbuf>> 
m_colThreat1Color;    ///< the color of a legend object

3. Then, have a TreeView & a List/TreeStore
     Gtk::TreeView                    *m_tvpSensorTreeView;///< Sensors 
Tree View
     Glib::RefPtr<Gtk::ListStore>  m_lststorSensors;   ///< list store 
for Sensors

4. then set them up:
  m_lststorSensors = Gtk::ListStore::create( m_atmcAllTreeModelColumns 
);  // construct "MODEL"  
  m_tvpSensorTreeView->set_model(m_lststorSensors); // Add Model to 
TreeView
  m_tvpSensorTreeView->property_enable_grid_lines();
  m_tvpSensorTreeView->set_rules_hint();

5. Then Add 2 Model Columns to a Singular TreeView Column: Render is 
optional since both of these "types" are default types

Gtk::TreeView::Column* pColumn = Gtk::manage( new 
Gtk::TreeView::Column(gus_ColumnTitle) ); // Construct Model Column
 pColumn->pack_start( p_tmcstrThreatNumber,   false ); // Threat Number 
Model Column
 pColumn->pack_start( p_tmcpixDetectionColor, false ); // Sensor 
Detection Color Moldel Column


 // Set up Renderers for these Model Colums w/in the TreeView Column
 //
 Gtk::CellRendererPixbuf rendPix;
 Gtk::CellRendererText   rendTxt;
 pColumn->pack_start( rendPix, false);  // false so that the icon will 
consume as little space as needed w/in the cell
 pColumn->pack_start( rendTxt);

 Glib::PropertyProxy<Pango::Alignment> ali = rendTxt.property_alignment();
 ali.set_value(Pango::ALIGN_RIGHT);

  
 // Now, actually Add Model Column to Tree VIEW
 //
 TreeView->append_column( *pColumn ); // Passes a Reference (&) to what 
(*pColumn) points to.


6.  FINALLY     Add Data to the view

for (int i_row=0; i_row<N; i_row++)
 {
   Gtk::TreeModel::iterator  itr = p_lststorList->append(); // append 
New Row to List Store used by TreeView:
                                                                                      
//  whatever's in the liststore the treeview shows.
   Gtk::TreeModel::Row       row = *itr;                    // pointer 
to the actual Row in the List Store that was just instantiated
  
   // convert number to string number
   stringstream strstrm;
   strstrm << i_row+1;
   string str_row = strstrm.str();


   // THREAT  IMAGE COLOR
   //
   Glib::RefPtr<Gdk::Pixbuf>          pic  = 
m_imageSensorLegendAreaClear->get_pixbuf();  // some Image file or 
already loaded image
   Glib::RefPtr<Gdk::Pixbuf> scaledPic = 
pic->scale_simple(12,12,Gdk::INTERP_NEAREST); // 12px X 12px
  
  
   // THREATs
   //
    row[m_atmcAllTreeModelColumns.m_colThreat1]           = str_row ;
    row[m_atmcAllTreeModelColumns.m_colThreat1Color]  = scaledPic;
 }

--
Sincerely, Allen

Gene Allen Saucier, Jr
Senior Software Engineer
CAS, Inc
100 Quality Circle
Huntsville, AL  35806
or
PO Box 11190
Huntsville, AL  35814
(256) 922-6453 (w)
"...As for I and my house, we shall follow the Lord"  Joshua 24:15