gtkmm: Gtk::TreeModelColumnRecord Class Reference
Typedefed as TreeModel::ColumnRecord . More...
#include <gtkmm/treemodelcolumn.h>

Public Member Functions |
|
TreeModelColumnRecord () | |
virtual | ~TreeModelColumnRecord () noexcept |
void | add ( TreeModelColumnBase & column) |
Adds a
TreeModelColumn
to this record.
More...
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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 :
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
Gtk::TreeModelColumnRecord::TreeModelColumnRecord | ( | ) |
|
virtual noexcept |
Member Function Documentation
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.
unsigned int Gtk::TreeModelColumnRecord::size | ( | ) | const |
const GType* Gtk::TreeModelColumnRecord::types | ( | ) | const |