wg_range_control.h

// wg_range_control.h
//
// CRangeControl interface
//
//
// Copyright (c) 2002-2004 Rob Wiskow
// rob-dev@boxedchaos.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//


#ifndef _WG_RANGE_CONTROL_H_
#define _WG_RANGE_CONTROL_H_

#include "wg_window.h"
#include "wg_message_server.h"


namespace wGui
{


template<typename T>
class CRangeControl : public CWindow
{
public:
     CRangeControl(const CRect& WindowRect, CWindow* pParent, T minLimit, T maxLimit, T stepSize, T defaultValue) :
          CWindow(WindowRect, pParent), m_MinLimit(minLimit), m_MaxLimit(maxLimit), m_StepSize(stepSize), m_Value(defaultValue) { }

     virtual void SetMinLimit(T minLimit) { m_MinLimit = minLimit; }

     virtual T GetMinLimit(void) const { return m_MinLimit; }

     virtual void SetMaxLimit(T maxLimit) { m_MaxLimit = maxLimit; }

     virtual T GetMaxLimit(void) const { return m_MaxLimit; }

     virtual void SetStepSize(T stepSize) { m_StepSize = stepSize; }

     virtual T GetStepSize(void) const { return m_StepSize; }

     virtual void SetValue(T value, bool bRedraw = true)
     {
          m_Value = ConstrainValue(value);
          CMessageServer::Instance().QueueMessage(new CValueMessage<T>(CMessage::CTRL_VALUECHANGE, m_pParentWindow, this, m_Value));

          if (bRedraw)
          {
               Draw();
          }
     }

     virtual T GetValue(void) const { return m_Value; }

     virtual void Increment(bool bRedraw = true) { SetValue(m_Value + m_StepSize, bRedraw); }

     virtual void Decrement(bool bRedraw = true) { SetValue(m_Value - m_StepSize, bRedraw); }

     virtual T ConstrainValue(T value) const
     {
          if (value < m_MinLimit)
          {
               value = m_MinLimit;
          }
          if (value > m_MaxLimit)
          {
               value = m_MaxLimit;
          }
          return value;
     }


protected:
     T m_MinLimit;  
     T m_MaxLimit;  
     T m_StepSize;  
     T m_Value;  


private:
     void operator=(CRangeControl) { }  
};

}


#endif  // _WG_RANGE_CONTROL_H_

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