Re: change font in treeview

[Kjell Ahlstedt <kjell ahlstedt bredband net>]

2011-12-29 02:32, kiet tran skrev:
> Hi,
>
> Could any1 show me how to change font and its size for each row in 
> TreeModel.
>
> cheers,
>
> Kiet Tran
The TreeModel stores the data, the TreeView shows the data. The TreeView 
gets help from CellRenderers, such as CellRendererText. What you need to 
do is change some properties of a CellRenderer.

I haven't tried this myself. Some details may be wrong, but basically 
something like this:

// Get a pointer to the CellRenderer in the column you want to change.
Gtk::CellRenderer* cellRenderer = 
m_TreeView.get_column_cell_renderer(iViewColumn);
// Assume you expect it to be a CellRendererText.
Gtk::CellRendererText* cellRendererText = 
dynamic_cast<CellRendererText*>(cellRenderer);
if (cellRendererText)
{
  cellRendererText->property_font() = "MyExcellentFont";
  cellRendererText->property_size() = 20;
}

If you want to specify properties for individual cells (not just whole 
columns), I think you should use attributes in TreeViewColumn's 
CellLayout interface. Your TreeModel must contain one extra column for 
each attribute you specify.

Gtk::TreeViewColumn* treeViewColumn = m_TreeView.get_column(iViewColumn);
Gtk::CellRenderer* cellRenderer = 
m_TreeView.get_column_cell_renderer(iViewColumn);
// Assume you expect it to be a CellRendererText.
Gtk::CellRendererText* cellRendererText = 
dynamic_cast<CellRendererText*>(cellRenderer);
if (cellRendererText)
{
  treeViewColumn->add_attribute(cellRendererText->property_font(), 
m_Columns.m_font);
  treeViewColumn->add_attribute(cellRendererText->property_size(), 
m_Columns.m_size);
}

Have you studied the TreeView widget chapter in the gtkmm tutorial?
http://developer.gnome.org/gtkmm-tutorial/stable/chapter-treeview.html.en

Kjell