Re: [gtkmm] how to set appended Notebook page active? Test program

["Andreas B. Thun" <abt gmx de>]

As requested I implemented a small test program
based on the notebook example to
show the effect of set_current_page()
works only if you call it AFTER show_all_children():

Check out on_button_append():
Swap the marked two lines and set_current_page() has no effect anymore


examplewindow.cc:
-----------------
//$Id: examplewindow.cc,v 1.1 2002/11/04 18:20:32 murrayc Exp $ -*- c++ -*-

/* gtkmm example Copyright (C) 2002 gtkmm development team
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

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

ExampleWindow::ExampleWindow()
: m_Label1("Contents of tab 1"),
  m_Button_Append("Append"),
  m_Button_Quit("Quit")
{
  set_title("Gtk::Notebook example");
  set_border_width(10);
  set_default_size(400, 200);

  add(m_VBox);

  //Add the Notebook, with the buttons underneath:
  m_Notebook.set_border_width(10);
  m_VBox.pack_start(m_Notebook);
  m_VBox.pack_start(m_ButtonBox, Gtk::PACK_SHRINK);

  m_ButtonBox.pack_start(m_Button_Quit, Gtk::PACK_SHRINK);
  m_ButtonBox.pack_start(m_Button_Append, Gtk::PACK_SHRINK);
  m_Button_Quit.signal_clicked().connect( SigC::slot(*this, &ExampleWindow::on_button_quit) );
  m_Button_Append.signal_clicked().connect( SigC::slot(*this, &ExampleWindow::on_button_append) );

  //Add the Notebook pages:
  m_Notebook.append_page(m_Label1, "First");
  show_all();
}

ExampleWindow::~ExampleWindow()
{
}

void ExampleWindow::on_button_quit()
{
  hide();
}

void ExampleWindow::on_button_append()
{
  m_Label2 = Gtk::manage(new Gtk::Label("Contents of new tab"));
  m_Notebook.append_page(*m_Label2, "More");

  // Problem: Swap the following two lines and set_current_page() has no effect anymore
  show_all_children();
  m_Notebook.set_current_page(-1); // set last one active
}


examplewindow.h:
----------------

//$Id: examplewindow.h,v 1.1 2002/11/04 18:20:32 murrayc Exp $ -*- c++ -*-

/* gtkmm example Copyright (C) 2002 gtkmm development team
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#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_quit();
  void on_button_append();

  //Child widgets:
  Gtk::VBox m_VBox;
  Gtk::Notebook m_Notebook;
  Gtk::Label m_Label1;
  Gtk::Label *m_Label2;

  Gtk::HButtonBox m_ButtonBox;
  Gtk::Button m_Button_Quit;
  Gtk::Button m_Button_Append;

};

#endif //GTKMM_EXAMPLEWINDOW_H


main.cc:
--------

//$Id: main.cc,v 1.2 2002/11/11 15:13:05 murrayc Exp $ -*- c++ -*-

/* gtkmm example Copyright (C) 2002 gtkmm development team
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

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

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

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

  return 0;
}