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filtercopyblock.cpp

/**********************************************************************************
* Copyright (c) 2003, Christoph Rueegg <opendev@cdrnet.ch> and Matthias Bader     *
* Partially based on ideas of Tim Weyrich <weyrich@inf.ethz.ch>                   *
* and/or the Swiss Federal Institute of Technology http://www.ethz.ch             *
* All rights reserved.                                                            *
*                                                                                 *
* Project Website: http://www.cdrnet.net/projects/painter/                        *
*                                                                                 *
* Redistribution and use in source and binary forms, with or without modification,*
* are permitted provided that the following conditions are met:                   *
*                                                                                 *
* 1. Redistributions of source code must retain the above copyright notice,       *
* this list of conditions and the following disclaimer.                           *
*                                                                                 *
* 2. Redistributions in binary form must reproduce the above copyright notice,    *
* this list of conditions and the following disclaimer in the documentation       *
* and/or other materials provided with the distribution.                          *
*                                                                                 *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"     *
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE       *
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE      *
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE        *
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR             *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF            *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS        *
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN         *
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)         *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF          *
* THE POSSIBILITY OF SUCH DAMAGE.                                                 *
**********************************************************************************/

#include "filtercopyblock.h"

CopyBlockFilter::CopyBlockFilter() : ChannelSelectBoxFilter()
{
  selected = false;
  topleftx = toplefty = 2;
  bottomrightx = bottomrighty = 22;
}

CopyBlockFilter::~CopyBlockFilter()
{
}

void CopyBlockFilter::OnAction(const int topleftx, const int toplefty, const int bottomrightx, const int bottomrighty)
{
  if(selected)
    InvertArea(this->topleftx,this->toplefty,this->bottomrightx,this->bottomrighty);
  selected = true;
  this->topleftx = topleftx;
  this->toplefty = toplefty;
  this->bottomrightx = bottomrightx;
  this->bottomrighty = bottomrighty;
  InvertArea(topleftx,toplefty,bottomrightx,bottomrighty);
}

ChannelFilter<unsigned char>* CopyBlockFilter::EmptyClone()
{
  CopyBlockFilter *copy = new CopyBlockFilter();
  copy->SetSubChannel(ChannelSelectBoxFilter::GetSubChannel());
  return(copy);
}

void CopyBlockFilter::OnMouseEvent(const int button, const int state, int x, int y)
{
  if(selected && button==0 && state==0)
  {
    InvertArea(topleftx,toplefty,bottomrightx,bottomrighty);
    ChannelSelectBoxFilter::Normalize(&x,&y);
    int diffx = x - topleftx;
    int diffy = y - toplefty;
    int width = ChannelSelectBoxFilter::GetWidth();
    int height = ChannelSelectBoxFilter::GetHeight();
    int xi, yi;
    if(diffy>0 || diffy==0 && diffx<0)
    {
      yi = bottomrighty-1+diffy<height ? yi = bottomrighty-1 : height-diffy-1;
      for(;yi>=toplefty; yi--)
        for(xi = topleftx; xi<bottomrightx && xi+diffx<width; xi++)
          ChannelSelectBoxFilter::Set(xi+diffx,yi+diffy,ChannelSelectBoxFilter::Get(xi,yi));
    }
    if(diffy<0 || diffy==0 && diffx>0)
    {
      for(yi = toplefty; yi<bottomrighty && yi+diffy<height; yi++)
      {
        xi = bottomrightx-1+diffx<width ? bottomrightx-1 : width-diffx-1;
        for(;xi>=topleftx; xi--)
          ChannelSelectBoxFilter::Set(xi+diffx,yi+diffy,ChannelSelectBoxFilter::Get(xi,yi));
      }
    }
  }
  if(selected && button==0 && state==1)
  {
    selected = false;
  }
  if(!selected || button != 0)
  {
    ChannelSelectBoxFilter::OnMouseEvent(button,state,x,y);
  }
}

void CopyBlockFilter::ResetChannel()
{
  if(selected)
  {
    InvertArea(this->topleftx,this->toplefty,this->bottomrightx,this->bottomrighty);
    selected = false;
  }
  ChannelSelectBoxFilter::ResetChannel();
}

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