wxWidgets/include/wx/mgl/region.h

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/////////////////////////////////////////////////////////////////////////////
// Name: region.h
// Purpose: wxRegion class
// Author: Vaclav Slavik
// Created: 2001/03/12
// RCS-ID: $Id$
// Copyright: (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
// 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;
class MGLRegion;
class WXDLLEXPORT wxRegion : public wxGDIObject
{
DECLARE_DYNAMIC_CLASS(wxRegion);
friend class WXDLLEXPORT wxRegionIterator;
public:
wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
wxRegion(const wxRect& rect);
wxRegion(const MGLRegion& region);
wxRegion( const wxBitmap& bmp)
{
Union(bmp);
}
wxRegion( const wxBitmap& bmp,
const wxColour& transColour, int tolerance = 0)
{
Union(bmp, transColour, tolerance);
}
wxRegion();
~wxRegion();
//# Modify region
// Clear current region
void Clear(void);
bool Offset(wxCoord x, wxCoord y);
// Union rectangle or region with this.
bool Union(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
bool Union(const wxRect& rect) { return Union(rect.x, rect.y, rect.width, rect.height); }
bool Union(const wxRegion& region);
// Intersect rectangle or region with this.
bool Intersect(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
bool Intersect(const wxRect& rect) { return Intersect(rect.x, rect.y, rect.width, rect.height); }
bool Intersect(const wxRegion& region);
// Subtract rectangle or region from this:
// Combines the parts of 'this' that are not part of the second region.
bool Subtract(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
bool Subtract(const wxRect& rect) { return Subtract(rect.x, rect.y, rect.width, rect.height); }
bool Subtract(const wxRegion& region);
// XOR: the union of two combined regions except for any overlapping areas.
bool Xor(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
bool Xor(const wxRect& rect) { return Xor(rect.x, rect.y, rect.width, rect.height); }
bool Xor(const wxRegion& region);
//# Information on region
// Outer bounds of region
void GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const;
wxRect GetBox(void) const ;
// Is region empty?
bool Empty(void) const;
inline bool IsEmpty(void) const { return Empty(); }
//# Tests
// Does the region contain the point (x,y)?
wxRegionContain Contains(wxCoord x, wxCoord 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(wxCoord x, wxCoord y, wxCoord w, wxCoord 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);
// implementation from now on:
const MGLRegion& GetMGLRegion() const;
protected:
// ref counting code
virtual wxObjectRefData *CreateRefData() const;
virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
};
WX_DECLARE_EXPORTED_LIST(wxRect, wxRegionRectList);
class WXDLLEXPORT wxRegionIterator : public wxObject
{
DECLARE_DYNAMIC_CLASS(wxRegionIterator);
public:
wxRegionIterator(void);
wxRegionIterator(const wxRegion& region);
~wxRegionIterator(void);
void Reset(void) { m_currentNode = NULL; }
void Reset(const wxRegion& region);
#ifndef __SALFORDC__
operator bool (void) const { return (m_currentNode != NULL); }
#endif
bool HaveRects(void) const { return (m_currentNode != NULL); }
void operator ++ (void);
void operator ++ (int);
wxCoord GetX(void) const;
wxCoord GetY(void) const;
wxCoord GetW(void) const;
wxCoord GetWidth(void) const { return GetW(); }
wxCoord GetH(void) const;
wxCoord GetHeight(void) const { return GetH(); }
wxRect GetRect() const { return wxRect(GetX(), GetY(), GetWidth(), GetHeight()); }
private:
wxRegionRectList m_rects;
wxRegionRectList::Node *m_currentNode;
};
#endif
// _WX_REGION_H_