painter_holder.cpp

// painter_holder.cpp

// Copyright (C) 2004 Steven Weiß (steven11@gmx.de)
//
// Permission to copy, use, sell and distribute this software is granted
// provided this copyright notice appears in all copies.
// Permission to modify the code and to distribute modified code is granted
// provided this copyright notice appears in all copies, and a notice
// that the code was modified is included with the copyright notice.
//
// This software is provided "as is" without express or implied warranty,
// and with no claim as to its suitability for any purpose.


#include <background_wnd/painter_holder.hpp>


namespace win32 { namespace gui {

// ========================================================================================================== //
// painter_holder

// the big 4
painter_holder::painter_holder(painter_base* pPainter) : pPainter_(pPainter)
{}

painter_holder::painter_holder(const painter_holder& holder)
{
     painter_base* p = holder.pPainter_.get();
     if (p)
          set_raw_painter(p->clone());            
}

painter_holder::~painter_holder()
{}

const painter_holder& painter_holder::operator= (const painter_holder& holder)
{         
     if (&holder != this) {        
          release_painter();
          painter_base* p = holder.pPainter_.get();
          if (p)
               set_raw_painter(p->clone());
     }
     return *this;
}    

void painter_holder::set_painter(const painter_base& painter)
{
     set_raw_painter(painter.clone());
}

void painter_holder::release_painter()
{
     pPainter_.release();
}

painter_base& painter_holder::get_painter() const
{
     painter_base* p = pPainter_.get();
     if (p == NULL)
          throw no_painter(*this);
     return *p;          
}

bool painter_holder::painter_available() const
{
     return pPainter_.get() != NULL;
}

void painter_holder::swap(painter_holder& holder)
{
     std::swap(pPainter_, holder.pPainter_);
}

// resets the painter
void painter_holder::set_raw_painter(painter_base* pPainter)
{
     pPainter_.reset(pPainter);
}

} }  // namespace win32::gui

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