FontChooserDialog

The FontChooserDialog allows the user to choose a font. The FontButton opens a font chooser dialog when it is clicked.

Reference

15.4.1. Example

Figure 15-4FontChooserDialog

Source Code

File: examplewindow.h (For use with gtkmm 4)

#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H

#include <gtkmm.h>
#include <memory>

class ExampleWindow : public Gtk::Window
{
public:
  ExampleWindow();
  virtual ~ExampleWindow();

protected:
  //Signal handlers:
  void on_font_button_font_set();
  void on_button_dialog_clicked();
  void on_dialog_response(int response_id);

  //Child widgets:
  Gtk::Box m_ButtonBox;
  Gtk::FontButton m_FontButton;
  Gtk::Button m_Button_Dialog;

  std::unique_ptr<Gtk::FontChooserDialog> m_pDialog;
};

#endif //GTKMM_EXAMPLEWINDOW_H

File: main.cc (For use with gtkmm 4)

#include "examplewindow.h"
#include <gtkmm/application.h>

int main(int argc, char *argv[])
{
  auto app = Gtk::Application::create("org.gtkmm.example");

  //Shows the window and returns when it is closed.
  return app->make_window_and_run<ExampleWindow>(argc, argv);
}

File: examplewindow.cc (For use with gtkmm 4)

#include "examplewindow.h"
#include <iostream>

ExampleWindow::ExampleWindow()
: m_ButtonBox(Gtk::Orientation::VERTICAL),
  m_FontButton("Sans 10"),
  m_Button_Dialog("Choose Font")
{
  set_title("Gtk::FontChooserDialog example");

  set_child(m_ButtonBox);

  m_ButtonBox.append(m_FontButton);
  m_FontButton.set_expand(true);
  m_FontButton.set_use_font(true);
  m_FontButton.set_use_size(true);
  m_FontButton.signal_font_set().connect(sigc::mem_fun(*this,
    &ExampleWindow::on_font_button_font_set) );

  m_ButtonBox.append(m_Button_Dialog);
  m_Button_Dialog.set_expand(true);
  m_Button_Dialog.signal_clicked().connect(sigc::mem_fun(*this,
    &ExampleWindow::on_button_dialog_clicked) );
}

ExampleWindow::~ExampleWindow()
{
}

void ExampleWindow::on_font_button_font_set()
{
  auto font_name = m_FontButton.get_font();
  std::cout << "Font chosen: " << font_name << std::endl;
}

void ExampleWindow::on_button_dialog_clicked()
{
  if (!m_pDialog)
  {
    m_pDialog.reset(new Gtk::FontChooserDialog("Please choose a font", *this));
    m_pDialog->set_modal(true);
    m_pDialog->set_hide_on_close(true);
    m_pDialog->signal_response().connect(
      sigc::mem_fun(*this, &ExampleWindow::on_dialog_response));
  }

  //Get the previously selected font name from the FontButton:
  m_pDialog->set_font(m_FontButton.get_font());

  m_pDialog->show();
}

void ExampleWindow::on_dialog_response(int response_id)
{
  m_pDialog->hide();

  //Handle the response:
  switch (response_id)
  {
    case Gtk::ResponseType::OK:
    {
      auto font_name = m_pDialog->get_font();
      std::cout << "Font chosen: " << font_name << std::endl;
      m_FontButton.set_font(font_name);
      break;
    }
    case Gtk::ResponseType::CANCEL:
    {
      std::cout << "Cancel clicked." << std::endl;
      break;
    }
    default:
    {
      std::cout << "Unexpected button clicked: " << response_id << std::endl;
      break;
    }
  }
}