(C++) QtToggleButtonWidget

QtToggleButtonWidget is a Qt widget class to display an ToggleButtonWidget.

qttogglebuttonwidget.h


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

/*

QtToggleButtonWidget, Qt widget for displaying the ToggleButtonWidget 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/CppQtToggleButtonWidget.htm

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

#ifndef QTTOGGLEBUTTONWIDGET_H

#define QTTOGGLEBUTTONWIDGET_H

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

#include <string>

#include <vector>

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

#include <boost/signals2.hpp>

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

#include <QWidget>

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

struct ToggleButton;

struct ToggleButtonWidget;

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

///QtToggleButtonWidget displays a ToggleButton

struct QtToggleButtonWidget : public QWidget

{

  ///A QtToggleButtonWidget is created by its toggle state and its color

  QtToggleButtonWidget(

    const bool toggled = false,

    const unsigned char red = 255,

    const unsigned char green = 255,

    const unsigned char blue = 255);



  ///Obtain a read-only pointer to the ToggleButton

  const ToggleButtonWidget * GetWidget() const { return m_widget.get(); }



  ///Obtain a read-and-write pointer to the ToggleButton

  ToggleButtonWidget * GetWidget() { return m_widget.get(); }



  ///Signal that is emitted when a QtToggleButtonWidget is toggled

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



  ///Obtain the QtToggleButtonWidget its version

  static const std::string GetVersion();



  ///Obtain the QtToggleButtonWidget its version history

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



  ///Draw a ToggleButton from a ToggleButton

  static void DrawToggleButton(

    QPainter& painter,

    const int left, const int top,

    const int width, const int height,

    const ToggleButton * const toggle_button);



  ///Draw a ToggleButton from a ToggleButtonWidget

  static void DrawToggleButton(

    QPainter& painter,

    const ToggleButtonWidget * const widget);



  protected:

  ///Paint the QtToggleButtonWidget

  void paintEvent(QPaintEvent * event);



  ///Resize the QtToggleButtonWidget

  void resizeEvent(QResizeEvent *);



  private:



  ///The ToggleButton

  boost::scoped_ptr<ToggleButtonWidget> m_widget;



  ///Repaint the QtToggleButtonWidget

  void DoRepaint();



  ///Respond to mouse click

  void mousePressEvent(QMouseEvent * e);

};

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

#endif // QTTOGGLEBUTTONWIDGET_H

qttogglebuttonwidget.cpp


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

/*

QtToggleButtonWidget, Qt widget for displaying the ToggleButtonWidget 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/CppQtToggleButtonWidget.htm

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

#include <iostream>

#include <boost/bind.hpp>

#include <boost/numeric/conversion/cast.hpp>

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

#include <QBrush>

#include <QMouseEvent>

#include <QPainter>

#include <QPen>

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

#include "togglebutton.h"

#include "togglebuttonwidget.h"

#include "qttogglebuttonwidget.h"

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

QtToggleButtonWidget::QtToggleButtonWidget(

  const bool toggled,

  const unsigned char red,

  const unsigned char green,

  const unsigned char blue)

  : m_widget(new ToggleButtonWidget(toggled,red,green,blue))

{

  assert(m_widget);

  m_widget->GetToggleButton()->m_signal_toggled.connect(

    boost::bind(

      &QtToggleButtonWidget::DoRepaint,

      this));



  this->resize(200,100);

  this->update();

}

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

void QtToggleButtonWidget::DoRepaint()

{

  this->update();

}

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

void QtToggleButtonWidget::DrawToggleButton(

  QPainter& painter,

  const int left, const int top,

  const int width, const int height,

  const ToggleButton * const button)

{

  painter.setBrush(QColor(

    button->GetRed(),

    button->GetGreen(),

    button->GetBlue()));

  //Draw base

  painter.drawArc(

    left + 0,

    top + (height * 1 / 3),

    width,

    height * 2 / 3,

    180 * 16,

    180 * 16);

  //Draw top

  painter.drawEllipse(

    left + 0,

    top + (button->IsPressed() ? (height * 1 / 3) - 2 : 0.0),

    width,

    height * 2 / 3);

  painter.drawLine(

    left,

    top + (button->IsPressed() ? (height * 2 / 3) - 2 : (height * 1 / 3)),

    left,

    top + (height * 2 / 3));

  painter.drawLine(

    left + (width),

    top + (button->IsPressed() ? (height * 2 / 3) - 2 : (height * 1 / 3)),

    left + width,

    top + (height * 2 / 3));

}

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

void QtToggleButtonWidget::DrawToggleButton(

  QPainter& painter,

  const ToggleButtonWidget * const widget)

{

  DrawToggleButton(

    painter,

    widget->GetGeometry().GetX(),

    widget->GetGeometry().GetY(),

    widget->GetGeometry().GetWidth(),

    widget->GetGeometry().GetHeight(),

    widget->GetToggleButton());

}

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

const std::string QtToggleButtonWidget::GetVersion()

{

  return "1.0";

}

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

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

{

  std::vector<std::string> v;

  v.push_back("YYYY-MM-DD: version X.Y: [description]");

  v.push_back("2011-06-16: version 1.0: initial version");

  return v;

}

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

void QtToggleButtonWidget::mousePressEvent(QMouseEvent * e)

{

  //m_widget its observers for a repaint

  m_widget->Click(e->x(),e->y());

}

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

void QtToggleButtonWidget::paintEvent(QPaintEvent *)

{

  QPainter painter(this);

  DrawToggleButton(painter,m_widget.get());

}

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

void QtToggleButtonWidget::resizeEvent(QResizeEvent *)

{

  this->m_widget->SetGeometry(Rect(0,0,this->width(),this->height()));

  repaint();

}

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

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