298 lines
9.4 KiB
C++
298 lines
9.4 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/region.h
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// Purpose: Base header for wxRegion
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// Author: Julian Smart
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// Modified by:
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// Created:
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// RCS-ID: $Id: region.h 58804 2009-02-09 09:01:19Z SC $
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// Copyright: (c) Julian Smart
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// Licence: wxWindows Licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_REGION_H_BASE_
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#define _WX_REGION_H_BASE_
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#include "wx/gdiobj.h"
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#include "wx/gdicmn.h"
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class WXDLLIMPEXP_FWD_CORE wxBitmap;
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class WXDLLIMPEXP_FWD_CORE wxColour;
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class WXDLLIMPEXP_FWD_CORE wxRegion;
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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// result of wxRegion::Contains() call
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enum wxRegionContain
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{
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wxOutRegion = 0,
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wxPartRegion = 1,
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wxInRegion = 2
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};
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// these constants are used with wxRegion::Combine() in the ports which have
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// this method
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enum wxRegionOp
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{
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// Creates the intersection of the two combined regions.
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wxRGN_AND,
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// Creates a copy of the region
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wxRGN_COPY,
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// Combines the parts of first region that are not in the second one
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wxRGN_DIFF,
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// Creates the union of two combined regions.
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wxRGN_OR,
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// Creates the union of two regions except for any overlapping areas.
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wxRGN_XOR
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};
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// ----------------------------------------------------------------------------
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// wxRegionBase defines wxRegion API
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxRegionBase : public wxGDIObject
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{
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public:
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// ctors
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// -----
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// none are defined here but the following should be available:
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#if 0
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wxRegion();
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wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
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wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
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wxRegion(const wxRect& rect);
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wxRegion(size_t n, const wxPoint *points, wxPolygonFillMode fillStyle = wxODDEVEN_RULE);
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wxRegion(const wxBitmap& bmp);
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wxRegion(const wxBitmap& bmp, const wxColour& transp, int tolerance = 0);
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#endif // 0
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// operators
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// ---------
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bool operator==(const wxRegion& region) const { return IsEqual(region); }
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bool operator!=(const wxRegion& region) const { return !(*this == region); }
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// accessors
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// ---------
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// Is region empty?
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virtual bool IsEmpty() const = 0;
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bool Empty() const { return IsEmpty(); }
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// Is region equal (i.e. covers the same area as another one)?
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bool IsEqual(const wxRegion& region) const;
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// Get the bounding box
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bool GetBox(wxCoord& x, wxCoord& y, wxCoord& w, wxCoord& h) const
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{ return DoGetBox(x, y, w, h); }
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wxRect GetBox() const
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{
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wxCoord x, y, w, h;
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return DoGetBox(x, y, w, h) ? wxRect(x, y, w, h) : wxRect();
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}
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// Test if the given point or rectangle is inside this region
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wxRegionContain Contains(wxCoord x, wxCoord y) const
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{ return DoContainsPoint(x, y); }
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wxRegionContain Contains(const wxPoint& pt) const
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{ return DoContainsPoint(pt.x, pt.y); }
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wxRegionContain Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const
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{ return DoContainsRect(wxRect(x, y, w, h)); }
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wxRegionContain Contains(const wxRect& rect) const
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{ return DoContainsRect(rect); }
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// operations
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// ----------
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virtual void Clear() = 0;
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// Move the region
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bool Offset(wxCoord x, wxCoord y)
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{ return DoOffset(x, y); }
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bool Offset(const wxPoint& pt)
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{ return DoOffset(pt.x, pt.y); }
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// Union rectangle or region with this region.
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bool Union(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
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{ return DoUnionWithRect(wxRect(x, y, w, h)); }
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bool Union(const wxRect& rect)
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{ return DoUnionWithRect(rect); }
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bool Union(const wxRegion& region)
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{ return DoUnionWithRegion(region); }
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#if wxUSE_IMAGE
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// Use the non-transparent pixels of a wxBitmap for the region to combine
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// with this region. First version takes transparency from bitmap's mask,
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// second lets the user specify the colour to be treated as transparent
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// along with an optional tolerance value.
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// NOTE: implemented in common/rgncmn.cpp
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bool Union(const wxBitmap& bmp);
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bool Union(const wxBitmap& bmp, const wxColour& transp, int tolerance = 0);
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#endif // wxUSE_IMAGE
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// Intersect rectangle or region with this one.
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bool Intersect(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
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bool Intersect(const wxRect& rect);
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bool Intersect(const wxRegion& region)
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{ return DoIntersect(region); }
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// Subtract rectangle or region from this:
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// Combines the parts of 'this' that are not part of the second region.
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bool Subtract(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
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bool Subtract(const wxRect& rect);
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bool Subtract(const wxRegion& region)
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{ return DoSubtract(region); }
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// XOR: the union of two combined regions except for any overlapping areas.
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bool Xor(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
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bool Xor(const wxRect& rect);
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bool Xor(const wxRegion& region)
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{ return DoXor(region); }
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// Convert the region to a B&W bitmap with the white pixels being inside
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// the region.
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wxBitmap ConvertToBitmap() const;
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protected:
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virtual bool DoIsEqual(const wxRegion& region) const = 0;
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virtual bool DoGetBox(wxCoord& x, wxCoord& y, wxCoord& w, wxCoord& h) const = 0;
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virtual wxRegionContain DoContainsPoint(wxCoord x, wxCoord y) const = 0;
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virtual wxRegionContain DoContainsRect(const wxRect& rect) const = 0;
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virtual bool DoOffset(wxCoord x, wxCoord y) = 0;
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virtual bool DoUnionWithRect(const wxRect& rect) = 0;
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virtual bool DoUnionWithRegion(const wxRegion& region) = 0;
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virtual bool DoIntersect(const wxRegion& region) = 0;
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virtual bool DoSubtract(const wxRegion& region) = 0;
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virtual bool DoXor(const wxRegion& region) = 0;
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};
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// some ports implement a generic Combine() function while others only
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// implement individual wxRegion operations, factor out the common code for the
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// ports with Combine() in this class
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#if defined(__WXPALMOS__) || \
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defined(__WXMSW__) || \
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( defined(__WXMAC__) && wxOSX_USE_COCOA_OR_CARBON ) || \
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defined(__WXPM__)
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#define wxHAS_REGION_COMBINE
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class WXDLLIMPEXP_CORE wxRegionWithCombine : public wxRegionBase
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{
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public:
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// these methods are not part of public API as they're not implemented on
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// all ports
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bool Combine(wxCoord x, wxCoord y, wxCoord w, wxCoord h, wxRegionOp op);
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bool Combine(const wxRect& rect, wxRegionOp op);
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bool Combine(const wxRegion& region, wxRegionOp op)
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{ return DoCombine(region, op); }
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protected:
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// the real Combine() method, to be defined in the derived class
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virtual bool DoCombine(const wxRegion& region, wxRegionOp op) = 0;
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// implement some wxRegionBase pure virtuals in terms of Combine()
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virtual bool DoUnionWithRect(const wxRect& rect);
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virtual bool DoUnionWithRegion(const wxRegion& region);
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virtual bool DoIntersect(const wxRegion& region);
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virtual bool DoSubtract(const wxRegion& region);
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virtual bool DoXor(const wxRegion& region);
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};
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#endif // ports with wxRegion::Combine()
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#if defined(__WXPALMOS__)
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#include "wx/palmos/region.h"
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#elif defined(__WXMSW__)
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#include "wx/msw/region.h"
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#elif defined(__WXGTK20__)
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#include "wx/gtk/region.h"
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#elif defined(__WXGTK__)
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#include "wx/gtk1/region.h"
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#elif defined(__WXMOTIF__) || defined(__WXX11__)
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#include "wx/x11/region.h"
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#elif defined(__WXMGL__)
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#include "wx/mgl/region.h"
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#elif defined(__WXDFB__)
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#include "wx/dfb/region.h"
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#elif defined(__WXMAC__)
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#include "wx/osx/region.h"
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#elif defined(__WXCOCOA__)
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#include "wx/cocoa/region.h"
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#elif defined(__WXPM__)
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#include "wx/os2/region.h"
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#endif
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// ----------------------------------------------------------------------------
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// inline functions implementation
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// ----------------------------------------------------------------------------
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// NB: these functions couldn't be defined in the class declaration as they use
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// wxRegion and so can be only defined after including the header declaring
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// the real class
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inline bool wxRegionBase::Intersect(const wxRect& rect)
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{
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return DoIntersect(wxRegion(rect));
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}
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inline bool wxRegionBase::Subtract(const wxRect& rect)
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{
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return DoSubtract(wxRegion(rect));
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}
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inline bool wxRegionBase::Xor(const wxRect& rect)
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{
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return DoXor(wxRegion(rect));
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}
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// ...and these functions are here because they call the ones above, and its
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// not really proper to call an inline function before its defined inline.
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inline bool wxRegionBase::Intersect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
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{
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return Intersect(wxRect(x, y, w, h));
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}
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inline bool wxRegionBase::Subtract(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
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{
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return Subtract(wxRect(x, y, w, h));
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}
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inline bool wxRegionBase::Xor(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
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{
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return Xor(wxRect(x, y, w, h));
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}
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#ifdef wxHAS_REGION_COMBINE
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inline bool wxRegionWithCombine::Combine(wxCoord x,
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wxCoord y,
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wxCoord w,
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wxCoord h,
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wxRegionOp op)
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{
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return DoCombine(wxRegion(x, y, w, h), op);
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}
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inline bool wxRegionWithCombine::Combine(const wxRect& rect, wxRegionOp op)
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{
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return DoCombine(wxRegion(rect), op);
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}
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#endif // wxHAS_REGION_COMBINE
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#endif // _WX_REGION_H_BASE_
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