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[wxWidgets.git] / src / gtk1 / region.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        region.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////


#ifdef __GNUG__
#pragma implementation "region.h"
#endif

#include "wx/region.h"

//-----------------------------------------------------------------------------
// wxRegion
//-----------------------------------------------------------------------------

class wxRegionRefData: public wxObjectRefData
{
  public:
  
    wxRegionRefData(void);
    ~wxRegionRefData(void);
  
  public:    

    GdkRegion  *m_region;
    wxList      m_rects;
};

wxRegionRefData::wxRegionRefData(void)
{
  m_region = (GdkRegion *) NULL;
}

wxRegionRefData::~wxRegionRefData(void)
{
  if (m_region) gdk_region_destroy( m_region );
  
  wxNode *node = m_rects.First();
  while (node)
  {
    wxRect *r = (wxRect*)node->Data();
    delete r;
    node = node->Next();
  }
}

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

#define M_REGIONDATA ((wxRegionRefData *)m_refData)

IMPLEMENT_DYNAMIC_CLASS(wxRegion,wxGDIObject);
  
wxRegion::wxRegion( long x, long y, long w, long h )
{
  m_refData = new wxRegionRefData();
  GdkRegion *reg = gdk_region_new();
  GdkRectangle rect;
  rect.x = x;
  rect.y = y;
  rect.width = w;
  rect.height = h;
  M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
  gdk_region_destroy( reg );
  M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,w,h) );
}

wxRegion::wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
{
  m_refData = new wxRegionRefData();
  GdkRegion *reg = gdk_region_new();
  GdkRectangle rect;
  rect.x = topLeft.x;
  rect.y = topLeft.y;
  rect.width = bottomRight.x - rect.x;
  rect.height = bottomRight.y - rect.y;
  M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
  gdk_region_destroy( reg );
  M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(topLeft,bottomRight) );
}

wxRegion::wxRegion( const wxRect& rect )
{
  m_refData = new wxRegionRefData();
  GdkRegion *reg = gdk_region_new();
  GdkRectangle g_rect;
  g_rect.x = rect.x;
  g_rect.y = rect.y;
  g_rect.width = rect.width;
  g_rect.height = rect.height;
  M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &g_rect );
  gdk_region_destroy( reg );
  
  wxNode *node = M_REGIONDATA->m_rects.First();
  while (node)
  {
    wxRect *r = (wxRect*)node->Data();
    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
    node = node->Next();
  }
}

wxRegion::wxRegion(void)
{
  m_refData = new wxRegionRefData();
  M_REGIONDATA->m_region = gdk_region_new();
}

wxRegion::~wxRegion(void)
{
}

bool wxRegion::operator == ( const wxRegion& region )
{
  return m_refData == region.m_refData; 
}

bool wxRegion::operator != ( const wxRegion& region )
{
  return m_refData != region.m_refData; 
}

void wxRegion::Clear(void)
{
  UnRef();
  m_refData = new wxRegionRefData();
  M_REGIONDATA->m_region = gdk_region_new();
}

bool wxRegion::Union( long x, long y, long width, long height )
{
  GdkRectangle rect;
  rect.x = x;
  rect.y = y;
  rect.width = width;
  rect.height = height;
  GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
  gdk_region_destroy( M_REGIONDATA->m_region );
  M_REGIONDATA->m_region = reg;
  M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,width,height) );
  return TRUE;
}

bool wxRegion::Union( const wxRect& rect )
{
  GdkRectangle g_rect;
  g_rect.x = rect.x;
  g_rect.y = rect.y;
  g_rect.width = rect.width;
  g_rect.height = rect.height;
  GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &g_rect );
  gdk_region_destroy( M_REGIONDATA->m_region );
  M_REGIONDATA->m_region = reg;
  M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(rect.x,rect.y,rect.width,rect.height) );
  return TRUE;
}

bool wxRegion::Union( const wxRegion& region )
{
  GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
  gdk_region_destroy( M_REGIONDATA->m_region );
  M_REGIONDATA->m_region = reg;
  
  wxNode *node = region.GetRectList()->First();
  while (node)
  {
    wxRect *r = (wxRect*)node->Data();
    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
    node = node->Next();
  }
  
  return TRUE;
}

bool wxRegion::Intersect( long x, long y, long width, long height )
{
  wxRegion reg( x, y, width, height );
  Intersect( reg );
  return TRUE;
}

bool wxRegion::Intersect( const wxRect& rect )
{
  wxRegion reg( rect );
  Intersect( reg );
  return TRUE;
}

bool wxRegion::Intersect( const wxRegion& region )
{
  GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
  gdk_region_destroy( M_REGIONDATA->m_region );
  M_REGIONDATA->m_region = reg;
  return TRUE;
}

bool wxRegion::Subtract( long x, long y, long width, long height )
{
  wxRegion reg( x, y, width, height );
  Subtract( reg );
  return TRUE;
}

bool wxRegion::Subtract( const wxRect& rect )
{
  wxRegion reg( rect );
  Subtract( reg );
  return TRUE;
}

bool wxRegion::Subtract( const wxRegion& region )
{
  GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
  gdk_region_destroy( M_REGIONDATA->m_region );
  M_REGIONDATA->m_region = reg;
  return TRUE;
}

bool wxRegion::Xor( long x, long y, long width, long height )
{
  wxRegion reg( x, y, width, height );
  Xor( reg );
  return TRUE;
}

bool wxRegion::Xor( const wxRect& rect )
{
  wxRegion reg( rect );
  Xor( reg );
  return TRUE;
}

bool wxRegion::Xor( const wxRegion& region )
{
  GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
  gdk_region_destroy( M_REGIONDATA->m_region );
  M_REGIONDATA->m_region = reg;
  
  wxNode *node = region.GetRectList()->First();
  while (node)
  {
    wxRect *r = (wxRect*)node->Data();
    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
    node = node->Next();
  }
  
  return TRUE;
}

void wxRegion::GetBox( long& x, long& y, long&w, long &h ) const
{
  x = 0;
  y = 0;
  w = -1;
  h = -1;
  wxNode *node = GetRectList()->First();
  while (node)
  {
    wxRect *r = (wxRect*)node->Data();
    if (node == GetRectList()->First())
    {
      x = r->x;
      y = r->y;
      w = r->width;
      h = r->height;
    }
    else
    {
      if (r->x < x)
      {
        x = r->x;
        w += x - r->x;
      }
      if (r->y < y) 
      {
        y = r->y;
        h += y - r->y;
      }
      if (r->width+r->x > x+w) 
      {
        w = r->x + r->width - x;
      }
      if (r->height+r->y > y+h) 
      {
        h = r->y + r->height - y;
      }
    }
    node = node->Next();
  }
}

wxRect wxRegion::GetBox(void) const
{
  long x = 0;
  long y = 0;
  long w = -1;
  long h = -1;
  GetBox( x, y, w, h );
  return wxRect( x, y, w, h );
}

bool wxRegion::Empty(void) const
{
  return gdk_region_empty( M_REGIONDATA->m_region );
}

wxRegionContain wxRegion::Contains( long x, long y ) const
{
  if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
    return wxInRegion;
  else
    return wxOutRegion;
}

wxRegionContain wxRegion::Contains( long x, long y, long w, long h ) const
{
  GdkRectangle rect;
  rect.x = x;
  rect.y = y;
  rect.width = w;
  rect.height = h;
  GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
  switch (res)
  {
   case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
   case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
   case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
  }
  return wxOutRegion;
}

wxRegionContain wxRegion::Contains(const wxPoint& pt) const
{
  return Contains( pt.x, pt.y );
}

wxRegionContain wxRegion::Contains(const wxRect& rect) const
{
  return Contains( rect.x, rect.y, rect.width, rect.height );
}

GdkRegion *wxRegion::GetRegion(void) const
{
  return M_REGIONDATA->m_region;
}

wxList *wxRegion::GetRectList() const
{
  return &(M_REGIONDATA->m_rects);
}

//-----------------------------------------------------------------------------
// wxRegion
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
  
wxRegionIterator::wxRegionIterator(void)
{
  m_current = 0;
}

wxRegionIterator::wxRegionIterator( const wxRegion& region )
{
  m_region = region;
  m_current = 0;
}

void wxRegionIterator::Reset( const wxRegion& region )
{
  m_region = region;
  m_current = 0;
}

wxRegionIterator::operator bool (void) const 
{ 
  return m_current < m_region.GetRectList()->Number(); 
}

bool wxRegionIterator::HaveRects(void) const 
{ 
  return m_current < m_region.GetRectList()->Number(); 
}

void wxRegionIterator::operator ++ (void)
{
  if (m_current < m_region.GetRectList()->Number()) ++m_current;
}

void wxRegionIterator::operator ++ (int)
{
  if (m_current < m_region.GetRectList()->Number()) ++m_current;
}

long wxRegionIterator::GetX(void) const
{
  wxNode *node = m_region.GetRectList()->Nth( m_current );
  if (!node) return 0;
  wxRect *r = (wxRect*)node->Data();
  return r->x;
}

long wxRegionIterator::GetY(void) const
{
  wxNode *node = m_region.GetRectList()->Nth( m_current );
  if (!node) return 0;
  wxRect *r = (wxRect*)node->Data();
  return r->y;
}

long wxRegionIterator::GetW(void) const
{
  wxNode *node = m_region.GetRectList()->Nth( m_current );
  if (!node) return 0;
  wxRect *r = (wxRect*)node->Data();
  return r->width;
}

long wxRegionIterator::GetH(void) const
{
  wxNode *node = m_region.GetRectList()->Nth( m_current );
  if (!node) return 0;
  wxRect *r = (wxRect*)node->Data();
  return r->height;
}