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/////////////////////////////////////////////////////////////////////////////
// Name: region.h
// Purpose: wxRegion class
// Author: Stefan Csomor
// Modified by:
// Created: 1998-01-01
// RCS-ID: $Id: region.h 41020 2006-09-05 20:47:48Z VZ $
// Copyright: (c) Stefan Csomor
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_REGION_H_
#define _WX_REGION_H_
#include "wx/list.h"
#include "wx/gdiobj.h"
#include "wx/gdicmn.h"
class WXDLLEXPORT wxRect;
class WXDLLEXPORT wxPoint;
// So far, for internal use only
enum wxRegionOp {
wxRGN_AND, // Creates the intersection of the two combined regions.
wxRGN_COPY, // Creates a copy of the region identified by hrgnSrc1.
wxRGN_DIFF, // Combines the parts of hrgnSrc1 that are not part of hrgnSrc2.
wxRGN_OR, // Creates the union of two combined regions.
wxRGN_XOR // Creates the union of two combined regions except for any overlapping areas.
};
class WXDLLEXPORT wxRegion : public wxGDIObject {
DECLARE_DYNAMIC_CLASS(wxRegion);
friend class WXDLLEXPORT wxRegionIterator;
public:
wxRegion(long x, long y, long w, long h);
wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
wxRegion(const wxRect& rect);
wxRegion( WXHRGN hRegion );
wxRegion();
wxRegion( const wxBitmap& bmp)
{
Union(bmp);
}
wxRegion( const wxBitmap& bmp,
const wxColour& transColour, int tolerance = 0)
{
Union(bmp, transColour, tolerance);
}
virtual ~wxRegion();
//# Modify region
// Clear current region
void Clear();
// Union rectangle or region with this.
bool Union(long x, long y, long width, long height)
{ return Combine(x, y, width, height, wxRGN_OR); }
bool Union(const wxRect& rect)
{ return Combine(rect, wxRGN_OR); }
bool Union(const wxRegion& region)
{ return Combine(region, wxRGN_OR); }
// Intersect rectangle or region with this.
bool Intersect(long x, long y, long width, long height)
{ return Combine(x, y, width, height, wxRGN_AND); }
bool Intersect(const wxRect& rect)
{ return Combine(rect, wxRGN_AND); }
bool Intersect(const wxRegion& region)
{ return Combine(region, wxRGN_AND); }
// Subtract rectangle or region from this:
// Combines the parts of 'this' that are not part of the second region.
bool Subtract(long x, long y, long width, long height)
{ return Combine(x, y, width, height, wxRGN_DIFF); }
bool Subtract(const wxRect& rect)
{ return Combine(rect, wxRGN_DIFF); }
bool Subtract(const wxRegion& region)
{ return Combine(region, wxRGN_DIFF); }
// XOR: the union of two combined regions except for any overlapping areas.
bool Xor(long x, long y, long width, long height)
{ return Combine(x, y, width, height, wxRGN_XOR); }
bool Xor(const wxRect& rect)
{ return Combine(rect, wxRGN_XOR); }
bool Xor(const wxRegion& region)
{ return Combine(region, wxRGN_XOR); }
//# Information on region
// Outer bounds of region
void GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const;
wxRect GetBox() const ;
// Is region empty?
bool Empty() const;
inline bool IsEmpty() const { return Empty(); }
//# Tests
// Does the region contain the point (x,y)?
wxRegionContain Contains(long x, long y) const;
// Does the region contain the point pt?
wxRegionContain Contains(const wxPoint& pt) const;
// Does the region contain the rectangle (x, y, w, h)?
wxRegionContain Contains(long x, long y, long w, long h) const;
// Does the region contain the rectangle rect?
wxRegionContain Contains(const wxRect& rect) const;
// Convert the region to a B&W bitmap with the white pixels being inside
// the region.
wxBitmap ConvertToBitmap() const;
// Use the non-transparent pixels of a wxBitmap for the region to combine
// with this region. First version takes transparency from bitmap's mask,
// second lets the user specify the colour to be treated as transparent
// along with an optional tolerance value.
// NOTE: implemented in common/rgncmn.cpp
bool Union(const wxBitmap& bmp);
bool Union(const wxBitmap& bmp,
const wxColour& transColour, int tolerance = 0);
// Internal
bool Combine(long x, long y, long width, long height, wxRegionOp op);
bool Combine(const wxRegion& region, wxRegionOp op);
bool Combine(const wxRect& rect, wxRegionOp op);
const WXHRGN GetWXHRGN() const ;
};
class WXDLLEXPORT wxRegionIterator : public wxObject
{
DECLARE_DYNAMIC_CLASS(wxRegionIterator)
public:
wxRegionIterator();
wxRegionIterator(const wxRegion& region);
wxRegionIterator(const wxRegionIterator& iterator);
virtual ~wxRegionIterator();
wxRegionIterator& operator=(const wxRegionIterator& iterator);
void Reset() { m_current = 0; }
void Reset(const wxRegion& region);
operator bool () const { return m_current < m_numRects; }
bool HaveRects() const { return m_current < m_numRects; }
wxRegionIterator& operator++();
wxRegionIterator operator++(int);
long GetX() const;
long GetY() const;
long GetW() const;
long GetWidth() const { return GetW(); }
long GetH() const;
long GetHeight() const { return GetH(); }
wxRect GetRect() const { return wxRect(GetX(), GetY(), GetWidth(), GetHeight()); }
private:
void SetRects(long numRects, wxRect *rects);
long m_current;
long m_numRects;
wxRegion m_region;
wxRect* m_rects;
};
#endif
// _WX_REGION_H_
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