ColorSelectionDialog

#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H

#include <gtkmm.h>

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

protected:
  //Signal handlers:
  void on_button_color_set();

  //Child widgets:
  Gtk::VBox m_VBox;
  Gtk::ColorButton m_Button;
  Gtk::DrawingArea m_DrawingArea; //To show the color.

  Gdk::RGBA m_Color;
};

#endif //GTKMM_EXAMPLEWINDOW_H

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


ExampleWindow::ExampleWindow()
{
  set_title("Gtk::ColorButton example");
  set_default_size(200, 200);

  add(m_VBox);

  m_VBox.pack_start(m_Button, Gtk::PACK_SHRINK);
  m_Button.signal_color_set().connect(sigc::mem_fun(*this,
              &ExampleWindow::on_button_color_set) );

  //Set start color:
  m_Color.set_red(0);
  m_Color.set_blue(1);
  m_Color.set_green(0);
  m_Button.set_rgba(m_Color);

  m_DrawingArea.override_background_color(m_Color);

  m_VBox.pack_start(m_DrawingArea);

  show_all_children();
}

ExampleWindow::~ExampleWindow()
{
}

void ExampleWindow::on_button_color_set()
{
  //Store the chosen color, and show it:
  m_Color = m_Button.get_rgba();
  m_DrawingArea.override_background_color(m_Color);
}

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

int main(int argc, char *argv[])
{
  Gtk::Main kit(argc, argv);

  ExampleWindow window;
  //Shows the window and returns when it is closed.
  Gtk::Main::run(window);

  return 0;
}