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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="combobox-example-full"></a>Full Example</h2></div></div></div>
<div class="figure">
<a name="figure-combobox-complex"></a><p class="title"><b>Figure 10.1. ComboBox</b></p>
<div class="figure-contents"><div class="screenshot"><div><img src="figures/combobox_complex.png" alt="ComboBox"></div></div></div>
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<br class="figure-break"><p><a class="ulink" href="http://git.gnome.org/browse/gtkmm-documentation/tree/examples/book/combobox/complex?h=master" target="_top">Source Code</a></p>
<p>File: <code class="filename">examplewindow.h</code> (For use with gtkmm 3, not gtkmm 2)
</p>
<pre class="programlisting">
#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H
#include <gtkmm/window.h>
#include <gtkmm/comboboxtext.h>
#include <gtkmm/liststore.h>
class ExampleWindow : public Gtk::Window
{
public:
ExampleWindow();
virtual ~ExampleWindow();
protected:
//Signal handlers:
void on_combo_changed();
//Tree model columns:
class ModelColumns : public Gtk::TreeModel::ColumnRecord
{
public:
ModelColumns()
{ add(m_col_id); add(m_col_name); }
Gtk::TreeModelColumn<int> m_col_id;
Gtk::TreeModelColumn<Glib::ustring> m_col_name;
};
ModelColumns m_Columns;
//Child widgets:
Gtk::ComboBox m_Combo;
Glib::RefPtr<Gtk::ListStore> m_refTreeModel;
};
#endif //GTKMM_EXAMPLEWINDOW_H
</pre>
<p>File: <code class="filename">examplewindow.cc</code> (For use with gtkmm 3, not gtkmm 2)
</p>
<pre class="programlisting">
#include "examplewindow.h"
#include <iostream>
ExampleWindow::ExampleWindow()
{
set_title("ComboBox example");
//Create the Tree model:
//m_refTreeModel = Gtk::TreeStore::create(m_Columns);
m_refTreeModel = Gtk::ListStore::create(m_Columns);
m_Combo.set_model(m_refTreeModel);
//Fill the ComboBox's Tree Model:
Gtk::TreeModel::Row row = *(m_refTreeModel->append());
row[m_Columns.m_col_id] = 1;
row[m_Columns.m_col_name] = "Billy Bob";
m_Combo.set_active(row);
/*
Gtk::TreeModel::Row childrow = *(m_refTreeModel->append(row.children()));
childrow[m_Columns.m_col_id] = 11;
childrow[m_Columns.m_col_name] = "Billy Bob Junior";
childrow = *(m_refTreeModel->append(row.children()));
childrow[m_Columns.m_col_id] = 12;
childrow[m_Columns.m_col_name] = "Sue Bob";
*/
row = *(m_refTreeModel->append());
row[m_Columns.m_col_id] = 2;
row[m_Columns.m_col_name] = "Joey Jojo";
row = *(m_refTreeModel->append());
row[m_Columns.m_col_id] = 3;
row[m_Columns.m_col_name] = "Rob McRoberts";
/*
childrow = *(m_refTreeModel->append(row.children()));
childrow[m_Columns.m_col_id] = 31;
childrow[m_Columns.m_col_name] = "Xavier McRoberts";
*/
//Add the model columns to the Combo (which is a kind of view),
//rendering them in the default way:
m_Combo.pack_start(m_Columns.m_col_id);
m_Combo.pack_start(m_Columns.m_col_name);
//Add the ComboBox to the window.
add(m_Combo);
//Connect signal handler:
m_Combo.signal_changed().connect( sigc::mem_fun(*this, &ExampleWindow::on_combo_changed) );
show_all_children();
}
ExampleWindow::~ExampleWindow()
{
}
void ExampleWindow::on_combo_changed()
{
Gtk::TreeModel::iterator iter = m_Combo.get_active();
if(iter)
{
Gtk::TreeModel::Row row = *iter;
if(row)
{
//Get the data for the selected row, using our knowledge of the tree
//model:
int id = row[m_Columns.m_col_id];
Glib::ustring name = row[m_Columns.m_col_name];
std::cout << " ID=" << id << ", name=" << name << std::endl;
}
}
else
std::cout << "invalid iter" << std::endl;
}
</pre>
<p>File: <code class="filename">main.cc</code> (For use with gtkmm 3, not gtkmm 2)
</p>
<pre class="programlisting">
#include "examplewindow.h"
#include <gtkmm/application.h>
int main(int argc, char *argv[])
{
Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.example");
ExampleWindow window;
//Shows the window and returns when it is closed.
return app->run(window);
}
</pre>
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