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- //----------------------------------------------------------------------------
- // ObjectWindows - (C) Copyright 1992, 1993 by Borland International
- // source\owl\region.cpp
- // Implementation of GDI Region object class
- //----------------------------------------------------------------------------
- #include <owl\owlpch.h>
- #include <owl\gdiobjec.h>
-
- DIAG_DECLARE_GROUP(OwlGDI); // General GDI diagnostic group
-
- TRegion::TRegion()
- {
- Handle = ::CreateRectRgn(0, 0, 0, 0);
- WARNX(OwlGDI, !Handle, 0, "Cannot create empty rect region");
- CheckValid();
- }
-
- TRegion::TRegion(HRGN handle, TAutoDelete autoDelete)
- : TGdiBase(handle, autoDelete)
- {
- }
-
- TRegion::TRegion(const TRegion& source)
- {
- Handle = ::CreateRectRgn(0, 0, 0, 0);
- WARNX(OwlGDI, !Handle, 0, "Cannot create copy of region " <<
- UINT(HRGN(source)));
- CheckValid();
- ::CombineRgn((HRGN)Handle, source, 0, RGN_COPY);
- }
-
- TRegion::TRegion(const TRect& rect)
- {
- Handle = ::CreateRectRgnIndirect(&rect);
- WARNX(OwlGDI, !Handle, 0, "Cannot create rect region " << rect);
- CheckValid();
- }
-
- TRegion::TRegion(const TRect& rect, TRegion::TEllipse)
- {
- Handle = ::CreateEllipticRgnIndirect(&rect);
- WARNX(OwlGDI, !Handle, 0, "Cannot create elliptic region " << rect);
- CheckValid();
- }
-
- TRegion::TRegion(const TRect& rect, const TSize& corner)
- {
- Handle = ::CreateRoundRectRgn(rect.left, rect.top, rect.right, rect.bottom,
- corner.cx, corner.cy);
- WARNX(OwlGDI, !Handle, 0, "Cannot create roundrect region " << rect << corner);
- CheckValid();
- }
-
- TRegion::TRegion(const TPoint* points, int count, int fillMode)
- {
- Handle = ::CreatePolygonRgn(points, count, fillMode);
- WARNX(OwlGDI, !Handle, 0, "Cannot create poly region " << count <<
- "pts @" << hex << DWORD(LPVOID(points)));
- CheckValid();
- }
-
- TRegion::TRegion(const TPoint* points, const int* polyCounts, int count,
- int fillMode)
- {
- Handle = ::CreatePolyPolygonRgn(points, polyCounts, count, fillMode);
- WARNX(OwlGDI, !Handle, 0, "Cannot create polypoly region " << count <<
- "polies @" << hex << DWORD(LPVOID(points)));
- CheckValid();
- }
-
- //
- // No orphan control for regions since they are not selectable into DCs,
- // just delete
- //
- TRegion::~TRegion()
- {
- if (ShouldDelete)
- if (!::DeleteObject(Handle))
- THROW( TGdiObject::TXGdi(IDS_GDIDELETEFAIL, Handle) );
- }
-
- TRegion&
- TRegion::operator &=(const TRect& source)
- {
- ::CombineRgn((HRGN)Handle, (HRGN)Handle, TRegion(source), RGN_AND);
- return *this;
- }
-
- TRegion&
- TRegion::operator |=(const TRect& source)
- {
- ::CombineRgn((HRGN)Handle, (HRGN)Handle, TRegion(source), RGN_OR);
- return *this;
- }
-
- TRegion&
- TRegion::operator ^=(const TRect& source)
- {
- ::CombineRgn((HRGN)Handle, (HRGN)Handle, TRegion(source), RGN_XOR);
- return *this;
- }
-