Typedefed as TreeModel::ColumnRecord. More...

#include <gtkmm/treemodelcolumn.h>

Inheritance diagram for Gtk::TreeModelColumnRecord:

Public Member Functions
	TreeModelColumnRecord ()

virtual	~TreeModelColumnRecord () noexcept

void	add (TreeModelColumnBase & column)
	Adds a TreeModelColumn to this record. More...

unsigned int	size () const

const GType *	types () const

Detailed Description

Typedefed as TreeModel::ColumnRecord.

Keeps a record of TreeModelColumns.

ColumnRecord objects are used to setup a new instance of a TreeModel (or rather, a new instance of an implementation of the model, such as Gtk::ListStore or Gtk::TreeStore). It is convenient to do that by deriving from TreeModel::ColumnRecord:

class MyModelColumns : public Gtk::TreeModel::ColumnRecord
{
public:
  Gtk::TreeModelColumn<Glib::ustring>                filename;
  Gtk::TreeModelColumn<Glib::ustring>                description;
  Gtk::TreeModelColumn< Glib::RefPtr<Gdk::Pixbuf> >  thumbnail;
 
  MyModelColumns() { add(filename); add(description); add(thumbnail); }
};

Whether or not you derive your own ColumnRecord, you need to add the TreeModelColumns to the ColumnRecord with the add() method.

A ColumnRecord instance, such as an instance of MyModelColumns should then be passed to ListStore::create() or TreeStore::create(). The TreeModelColumns, such as the members filename, description and thumbnail can then be used with Gtk::TreeRow::operator[]() to specify the column you're interested in.

Neither TreeModel::ColumnRecord nor the TreeModelColumns contain any real data – they merely describe what C++ type is stored in which column of a TreeModel, and save you from having to repeat that type information in several places.

Thus TreeModel::ColumnRecord can be made a singleton (as long as you make sure it's instantiated after Gtk::Main), even when creating multiple models from it.

Constructor & Destructor Documentation

◆ TreeModelColumnRecord()

Gtk::TreeModelColumnRecord::TreeModelColumnRecord ( )

◆ ~TreeModelColumnRecord()

virtual Gtk::TreeModelColumnRecord::~TreeModelColumnRecord ( )

virtualnoexcept

Member Function Documentation

◆ add()

void Gtk::TreeModelColumnRecord::add ( TreeModelColumnBase & column )

Adds a TreeModelColumn to this record.

add() not only registers the column, but also assigns a column index to it. Once registered, the TreeModelColumn is final, and you're free to pass it around by value.

◆ size()

unsigned int Gtk::TreeModelColumnRecord::size ( ) const

◆ types()

const GType * Gtk::TreeModelColumnRecord::types ( ) const

Public Member Functions