shinybutton.h


//---------------------------------------------------------------------------

/*

ShinyButton, toggle button class

Copyright (C) 2011 Richel Bilderbeek



This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.



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, see <http://www.gnu.org/licenses/>.

*/

//---------------------------------------------------------------------------

//From http://www.richelbilderbeek.nl/CppShinyButton.htm

//---------------------------------------------------------------------------

#ifndef SHINYBUTTON_H

#define SHINYBUTTON_H

//---------------------------------------------------------------------------

#include <string>

#include <vector>

//---------------------------------------------------------------------------

#include <boost/checked_delete.hpp>

#include <boost/signals2.hpp>

//---------------------------------------------------------------------------

///ShinyButton is a class for a toggle button

struct ShinyButton

{

  ShinyButton(

    const double color,

    const double gradient,

    const std::string& text = "");





  double GetColor() const { return m_color; }



  double GetGradient() const { return m_gradient; }



  const std::string& GetText() const { return m_text; }



  ///Set the ShinyButton its color

  void SetColor(

    const double color,

    const double gradient);



  ///Set the ShinyButton its text

  void SetText(const std::string& text);



  ///The signal that is emitted when ShinyButton changes color

  mutable boost::signals2::signal<void ()> m_signal_color_changed;



  ///The signal that is emitted when ShinyButton changes color

  mutable boost::signals2::signal<void ()> m_signal_text_changed;



  private:

  //ShinyButton can only be deleted by Boost smart pointers

  virtual ~ShinyButton() {}

  //ShinyButton can only be deleted by Boost smart pointers

  friend void boost::checked_delete<>(ShinyButton*);



  ///\brief

  ///The main color of the ShinyButton

  ///

  ///m_color denotes the fraction [0.0,1.0] on the rainbow:

  ///0.0 = red, 1.0 = magenta

  double m_color;



  ///\brief

  ///The change of gradient on the ShinyButton

  ///

  ///Gradient goes from [m_color-(0.5*m_gradient),m_color+(0.5*m_gradient)]

  ///0.0 = no gradient = a single color

  ///1.0 = show the entire rainbow with m_color in the middle

  double m_gradient;



  ///The text displayed by the ShinyButton

  std::string m_text;



  friend std::ostream& operator<<(std::ostream& os, const ShinyButton& button);



  public:

  static const std::string GetVersion();

  static const std::vector<std::string> GetVersionHistory();

};

//---------------------------------------------------------------------------

std::ostream& operator<<(std::ostream& os, const ShinyButton& button);

//---------------------------------------------------------------------------

#endif // SHINYBUTTON_H

//---------------------------------------------------------------------------

shinybutton.cpp


//---------------------------------------------------------------------------

/*

ShinyButton, toggle button class

Copyright (C) 2011 Richel Bilderbeek



This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.



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, see <http://www.gnu.org/licenses/>.

*/

//---------------------------------------------------------------------------

//From http://www.richelbilderbeek.nl/CppShinyButton.htm

//---------------------------------------------------------------------------

#include <cassert>

#include <cmath>

//---------------------------------------------------------------------------

#include "shinybutton.h"

#include "trace.h"

//---------------------------------------------------------------------------

ShinyButton::ShinyButton(

  const double color,

  const double gradient,

  const std::string& text)

  : m_color(color),

    m_gradient(gradient),

    m_text(text)

{



}

//---------------------------------------------------------------------------

const std::string ShinyButton::GetVersion()

{

  return "1.0";

}

//---------------------------------------------------------------------------

const std::vector<std::string> ShinyButton::GetVersionHistory()

{

  std::vector<std::string> v;

  v.push_back("2011-09-21: Version 1.0: initial version");

  return v;

}

//---------------------------------------------------------------------------

void ShinyButton::SetColor(

  const double color,

  const double gradient)

{

  if (color != m_color || gradient != m_gradient)

  {

    m_color = color;

    m_gradient = gradient;

    m_signal_color_changed();

  }

}

//---------------------------------------------------------------------------

void ShinyButton::SetText(

  const std::string& text)

{

  if (text != m_text)

  {

    m_text = text;

    m_signal_text_changed();

  }

}

//---------------------------------------------------------------------------

std::ostream& operator<<(std::ostream& os, const ShinyButton& button)

{

  os

    << "<ShinyButton>"

    << "<color>"

      << button.m_color

    << "</color>"

    << "<gradient>"

      << button.m_gradient

    << "</gradient>"

    << "<text>"

      << button.m_text

    << "</text>"

    << "</ShinyButton>";

  return os;



}

//---------------------------------------------------------------------------

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(C++) ShinyButton

shinybutton.h

shinybutton.cpp