/////////////////////////////////////////////////////////////////////////////
// Name: msw/region.cpp
-// Purpose: Region handling for wxWindows/X11
-// Author: Markus Holzem
+// Purpose: wxRegion implementation using Win32 API
+// Author: Vadim Zeitlin
// Modified by:
// Created: Fri Oct 24 10:46:34 MET 1997
// RCS-ID: $Id$
-// Copyright: (c) 1997 Julian Smart and Markus Holzem
+// Copyright: (c) 1997-2002 wxWindows team
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
#ifdef __GNUG__
-#pragma implementation "region.h"
+ #pragma implementation "region.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#pragma hdrstop
#endif
-#include "wx/msw/region.h"
+#include "wx/region.h"
#include "wx/gdicmn.h"
-#include "wx/window.h"
#include "wx/msw/private.h"
IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
// wxRegionRefData implementation
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
class WXDLLEXPORT wxRegionRefData : public wxGDIRefData
{
#endif
}
- ~wxRegionRefData()
+ virtual ~wxRegionRefData()
{
::DeleteObject(m_region);
m_region = 0;
}
HRGN m_region;
+
+private:
+// Cannot use
+// DECLARE_NO_COPY_CLASS(wxRegionRefData)
+// because copy constructor is explicitly declared above;
+// but no copy assignment operator is defined, so declare
+// it private to prevent the compiler from defining it:
+ wxRegionRefData& operator=(const wxRegionRefData&);
};
#define M_REGION (((wxRegionRefData*)m_refData)->m_region)
+#define M_REGION_OF(rgn) (((wxRegionRefData*)(rgn.m_refData))->m_region)
-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+// ============================================================================
+// wxRegion implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// ctors and dtor
+// ----------------------------------------------------------------------------
-/*
- * Create an empty region.
- */
wxRegion::wxRegion()
{
m_refData = (wxRegionRefData *)NULL;
return new wxRegionRefData(*(wxRegionRefData *)data);
}
-//-----------------------------------------------------------------------------
-// Modify region
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxRegion operations
+// ----------------------------------------------------------------------------
// Clear current region
void wxRegion::Clear()
bool wxRegion::Offset(wxCoord x, wxCoord y)
{
+ wxCHECK_MSG( M_REGION, FALSE, _T("invalid wxRegion") );
+
if ( !x && !y )
{
// nothing to do
return TRUE;
}
-// Combine rectangle (x, y, w, h) with this.
-bool wxRegion::Combine(wxCoord x, wxCoord y, wxCoord width, wxCoord height, wxRegionOp op)
+// combine another region with this one
+bool wxRegion::Combine(const wxRegion& rgn, wxRegionOp op)
{
- AllocExclusive();
-
- HRGN rectRegion = ::CreateRectRgn(x, y, x + width, y + height);
-
- int mode = 0;
- switch (op)
+ // we can't use the API functions if we don't have a valid region handle
+ if ( !m_refData )
{
- case wxRGN_AND: mode = RGN_AND; break ;
- case wxRGN_OR: mode = RGN_OR; break ;
- case wxRGN_XOR: mode = RGN_XOR; break ;
- case wxRGN_DIFF: mode = RGN_DIFF; break ;
- case wxRGN_COPY:
- default:
- mode = RGN_COPY; break ;
+ // combining with an empty/invalid region works differently depending
+ // on the operation
+ switch ( op )
+ {
+ case wxRGN_COPY:
+ case wxRGN_OR:
+ case wxRGN_XOR:
+ *this = rgn;
+ break;
+
+ default:
+ wxFAIL_MSG( _T("unknown region operation") );
+ // fall through
+
+ case wxRGN_AND:
+ case wxRGN_DIFF:
+ // leave empty/invalid
+ return FALSE;
+ }
}
-
- bool success = ::CombineRgn(M_REGION, M_REGION, rectRegion, mode) != ERROR;
- if ( !success )
+ else // we have a valid region
{
- wxLogLastError(_T("CombineRgn"));
- }
+ AllocExclusive();
- ::DeleteObject(rectRegion);
+ int mode;
+ switch ( op )
+ {
+ case wxRGN_AND:
+ mode = RGN_AND;
+ break;
- return success;
-}
+ case wxRGN_OR:
+ mode = RGN_OR;
+ break;
-// Union /e region with this.
-bool wxRegion::Combine(const wxRegion& region, wxRegionOp op)
-{
- if (region.Empty())
- return FALSE;
+ case wxRGN_XOR:
+ mode = RGN_XOR;
+ break;
- AllocExclusive();
+ case wxRGN_DIFF:
+ mode = RGN_DIFF;
+ break;
- int mode = 0;
- switch (op)
- {
- case wxRGN_AND: mode = RGN_AND; break ;
- case wxRGN_OR: mode = RGN_OR; break ;
- case wxRGN_XOR: mode = RGN_XOR; break ;
- case wxRGN_DIFF: mode = RGN_DIFF; break ;
- case wxRGN_COPY:
- default:
- mode = RGN_COPY; break ;
+ default:
+ wxFAIL_MSG( _T("unknown region operation") );
+ // fall through
+
+ case wxRGN_COPY:
+ mode = RGN_COPY;
+ break;
+ }
+
+ if ( ::CombineRgn(M_REGION, M_REGION, M_REGION_OF(rgn), mode) == ERROR )
+ {
+ wxLogLastError(_T("CombineRgn"));
+
+ return FALSE;
+ }
}
- return (ERROR != ::CombineRgn(M_REGION, M_REGION, ((wxRegionRefData*)region.m_refData)->m_region, mode));
+ return TRUE;
+}
+
+// Combine rectangle (x, y, w, h) with this.
+bool wxRegion::Combine(wxCoord x, wxCoord y,
+ wxCoord width, wxCoord height,
+ wxRegionOp op)
+{
+ return Combine(wxRegion(x, y, width, height), op);
}
bool wxRegion::Combine(const wxRect& rect, wxRegionOp op)
{
- return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op);
+ return Combine(rect.GetLeft(), rect.GetTop(),
+ rect.GetWidth(), rect.GetHeight(), op);
}
-//-----------------------------------------------------------------------------
-// Information on region
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxRegion bounding box
+// ----------------------------------------------------------------------------
// Outer bounds of region
void wxRegion::GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const
return (w == 0) && (h == 0);
}
-//-----------------------------------------------------------------------------
-// Tests
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxRegion hit testing
+// ----------------------------------------------------------------------------
// Does the region contain the point (x,y)?
wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y) const
if (!m_refData)
return wxOutRegion;
- if (::PtInRegion(M_REGION, (int) x, (int) y))
- return wxInRegion;
- else
- return wxOutRegion;
+ return ::PtInRegion(M_REGION, (int) x, (int) y) ? wxInRegion : wxOutRegion;
}
// Does the region contain the point pt?
wxRegionContain wxRegion::Contains(const wxPoint& pt) const
{
- if (!m_refData)
- return wxOutRegion;
-
- if (::PtInRegion(M_REGION, (int) pt.x, (int) pt.y))
- return wxInRegion;
- else
- return wxOutRegion;
+ return Contains(pt.x, pt.y);
}
// Does the region contain the rectangle (x, y, w, h)?
-wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const
+wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y,
+ wxCoord w, wxCoord h) const
{
if (!m_refData)
return wxOutRegion;
rect.right = x + w;
rect.bottom = y + h;
- if (::RectInRegion(M_REGION, & rect))
- return wxInRegion;
- else
- return wxOutRegion;
+ return ::RectInRegion(M_REGION, &rect) ? wxInRegion : wxOutRegion;
}
// Does the region contain the rectangle rect
wxRegionContain wxRegion::Contains(const wxRect& rect) const
{
- if (!m_refData)
- return wxOutRegion;
-
- wxCoord x, y, w, h;
- x = rect.x;
- y = rect.y;
- w = rect.GetWidth();
- h = rect.GetHeight();
- return Contains(x, y, w, h);
+ return Contains(rect.x, rect.y, rect.width, rect.height);
}
// Get internal region handle
WXHRGN wxRegion::GetHRGN() const
{
- if (!m_refData)
- return (WXHRGN) 0;
- return (WXHRGN) M_REGION;
+ return (WXHRGN)(m_refData ? M_REGION : 0);
}
-///////////////////////////////////////////////////////////////////////////////
-// //
-// wxRegionIterator //
-// //
-///////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// wxRegionIterator implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxRegionIterator ctors/dtor
+// ----------------------------------------------------------------------------
-/*
- * Initialize empty iterator
- */
-wxRegionIterator::wxRegionIterator() : m_current(0), m_numRects(0), m_rects(NULL)
+void wxRegionIterator::Init()
{
+ m_current =
+ m_numRects = 0;
+
+ m_rects = NULL;
}
wxRegionIterator::~wxRegionIterator()
{
- if (m_rects)
- delete[] m_rects;
+ delete [] m_rects;
}
-/*
- * Initialize iterator for region
- */
+// Initialize iterator for region
wxRegionIterator::wxRegionIterator(const wxRegion& region)
{
m_rects = NULL;
Reset(region);
}
-/*
- * Reset iterator for a new /e region.
- */
+wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri)
+{
+ delete [] m_rects;
+
+ m_current = ri.m_current;
+ m_numRects = ri.m_numRects;
+ if ( m_numRects )
+ {
+ m_rects = new wxRect[m_numRects];
+ for ( long n = 0; n < m_numRects; n++ )
+ m_rects[n] = ri.m_rects[n];
+ }
+ else
+ {
+ m_rects = NULL;
+ }
+
+ return *this;
+}
+
+// ----------------------------------------------------------------------------
+// wxRegionIterator operations
+// ----------------------------------------------------------------------------
+
+// Reset iterator for a new region.
void wxRegionIterator::Reset(const wxRegion& region)
{
m_current = 0;
m_region = region;
if (m_rects)
+ {
delete[] m_rects;
- m_rects = NULL;
+ m_rects = NULL;
+ }
if (m_region.Empty())
m_numRects = 0;
m_rects = new wxRect[header->nCount];
- RECT* rect = (RECT*) ((char*)rgnData + sizeof(RGNDATAHEADER)) ;
+ RECT* rect = (RECT*) ((char*)rgnData + sizeof(RGNDATAHEADER));
size_t i;
for (i = 0; i < header->nCount; i++)
{
m_numRects = header->nCount;
delete[] (char*) rgnData;
-#else
+#else // Win16
RECT rect;
::GetRgnBox(((wxRegionRefData*)region.m_refData)->m_region, &rect);
m_rects = new wxRect[1];
m_rects[0].height = rect.bottom - rect.top;
m_numRects = 1;
-#endif
+#endif // Win32/16
}
}
-/*
- * Increment iterator. The rectangle returned is the one after the
- * incrementation.
- */
-void wxRegionIterator::operator ++ ()
+wxRegionIterator& wxRegionIterator::operator++()
{
if (m_current < m_numRects)
++m_current;
+
+ return *this;
}
-/*
- * Increment iterator. The rectangle returned is the one before the
- * incrementation.
- */
-void wxRegionIterator::operator ++ (int)
+wxRegionIterator wxRegionIterator::operator ++ (int)
{
+ wxRegionIterator tmp = *this;
if (m_current < m_numRects)
++m_current;
+
+ return tmp;
}
+// ----------------------------------------------------------------------------
+// wxRegionIterator accessors
+// ----------------------------------------------------------------------------
+
wxCoord wxRegionIterator::GetX() const
{
- if (m_current < m_numRects)
- return m_rects[m_current].x;
- return 0;
+ wxCHECK_MSG( m_current < m_numRects, 0, _T("invalid wxRegionIterator") );
+
+ return m_rects[m_current].x;
}
wxCoord wxRegionIterator::GetY() const
{
- if (m_current < m_numRects)
- return m_rects[m_current].y;
- return 0;
+ wxCHECK_MSG( m_current < m_numRects, 0, _T("invalid wxRegionIterator") );
+
+ return m_rects[m_current].y;
}
wxCoord wxRegionIterator::GetW() const
{
- if (m_current < m_numRects)
- return m_rects[m_current].width ;
- return 0;
+ wxCHECK_MSG( m_current < m_numRects, 0, _T("invalid wxRegionIterator") );
+
+ return m_rects[m_current].width;
}
wxCoord wxRegionIterator::GetH() const
{
- if (m_current < m_numRects)
- return m_rects[m_current].height;
- return 0;
+ wxCHECK_MSG( m_current < m_numRects, 0, _T("invalid wxRegionIterator") );
+
+ return m_rects[m_current].height;
}
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