src/gtk/region.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        gtk/region.cpp
// Purpose:
// Author:      Robert Roebling
// Modified:    VZ at 05.10.00: use AllocExclusive(), comparison fixed
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

#ifdef __GNUG__
    #pragma implementation "region.h"
#endif

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#include "wx/region.h"

#include <gdk/gdk.h>
#include <gtk/gtk.h>

#include "wx/log.h"

// ----------------------------------------------------------------------------
// wxRegionRefData: private class containing the information about the region
// ----------------------------------------------------------------------------

class wxRegionRefData : public wxObjectRefData
{
public:
    wxRegionRefData()
    {
        m_region = NULL;
    }

    wxRegionRefData(const wxRegionRefData& refData)
    {
#ifdef __WXGTK20__
        m_region = gdk_region_copy(refData.m_region);
#else
        m_region = gdk_region_new();
        GdkRegion *regCopy = gdk_regions_union(m_region, refData.m_region);
        gdk_region_destroy(m_region);
        m_region = regCopy;
#endif
    }

    ~wxRegionRefData()
    {
        if (m_region)
            gdk_region_destroy( m_region );
    }

    GdkRegion  *m_region;
};

// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------

#define M_REGIONDATA ((wxRegionRefData *)m_refData)
#define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))

IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject);
IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);

// ----------------------------------------------------------------------------
// wxRegion construction
// ----------------------------------------------------------------------------

#define M_REGIONDATA ((wxRegionRefData *)m_refData)

void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
{
    GdkRectangle rect;
    rect.x = x;
    rect.y = y;
    rect.width = w;
    rect.height = h;

    m_refData = new wxRegionRefData();

#ifdef __WXGTK20__
    M_REGIONDATA->m_region = gdk_region_rectangle( rect );
#else
    GdkRegion *reg = gdk_region_new();
    M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
    gdk_region_destroy( reg );
#endif
}

wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
{
    GdkPoint *gdkpoints = new GdkPoint[n];
    for ( size_t i = 0 ; i < n ; i++ )
    {
        gdkpoints[i].x = points[i].x;
        gdkpoints[i].y = points[i].y;
    }

    m_refData = new wxRegionRefData();

    GdkRegion* reg = gdk_region_polygon
                     (
                        gdkpoints,
                        n,
                        fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
                                                    : GDK_EVEN_ODD_RULE
                     );

    M_REGIONDATA->m_region = reg;

    delete [] gdkpoints;
}

wxRegion::~wxRegion()
{
    // m_refData unrefed in ~wxObject
}

wxObjectRefData *wxRegion::CreateRefData() const
{
    return new wxRegionRefData;
}

wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const
{
    return new wxRegionRefData(*(wxRegionRefData *)data);
}

// ----------------------------------------------------------------------------
// wxRegion comparison
// ----------------------------------------------------------------------------

bool wxRegion::operator==( const wxRegion& region )
{
    if (m_refData == region.m_refData) return TRUE;

    if (!m_refData || !region.m_refData) return FALSE;

    // compare the regions themselves, not the pointers to ref data!
    return gdk_region_equal(M_REGIONDATA->m_region,
                            M_REGIONDATA_OF(region)->m_region);
}

// ----------------------------------------------------------------------------
// wxRegion operations
// ----------------------------------------------------------------------------

void wxRegion::Clear()
{
    UnRef();
}

bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    GdkRectangle rect;
    rect.x = x;
    rect.y = y;
    rect.width = width;
    rect.height = height;

    if (!m_refData)
    {
        m_refData = new wxRegionRefData();
#ifdef __WXGTK20__
        M_REGIONDATA->m_region = gdk_region_rectangle( rect );
#else
        GdkRegion *reg = gdk_region_new();
        M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
        gdk_region_destroy( reg );
#endif
    }
    else
    {
        AllocExclusive();

#ifdef __WXGTK20__
        gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
#else
        GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
        gdk_region_destroy( M_REGIONDATA->m_region );
        M_REGIONDATA->m_region = reg;
#endif
    }

    return TRUE;
}

bool wxRegion::Union( const wxRect& rect )
{
    return Union( rect.x, rect.y, rect.width, rect.height );
}

bool wxRegion::Union( const wxRegion& region )
{
    if (region.IsNull())
        return FALSE;

    if (!m_refData)
    {
        m_refData = new wxRegionRefData();
        M_REGIONDATA->m_region = gdk_region_new();
    }
    else
    {
        AllocExclusive();
    }

#ifdef __WXGTK20__
    gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
#else
    GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
    gdk_region_destroy( M_REGIONDATA->m_region );
    M_REGIONDATA->m_region = reg;
#endif

    return TRUE;
}

bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxRegion reg( x, y, width, height );

    return Intersect( reg );
}

bool wxRegion::Intersect( const wxRect& rect )
{
    wxRegion reg( rect );

    return Intersect( reg );
}

bool wxRegion::Intersect( const wxRegion& region )
{
    if (region.IsNull())
        return FALSE;

    if (!m_refData)
    {
        m_refData = new wxRegionRefData();
        M_REGIONDATA->m_region = gdk_region_new();

        // leave here
        return TRUE;
    }
    else
    {
        AllocExclusive();
    }

#ifdef __WXGTK20__
    gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
#else
    GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
    gdk_region_destroy( M_REGIONDATA->m_region );
    M_REGIONDATA->m_region = reg;
#endif

    return TRUE;
}

bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxRegion reg( x, y, width, height );
    return Subtract( reg );
}

bool wxRegion::Subtract( const wxRect& rect )
{
    wxRegion reg( rect );
    return Subtract( reg );
}

bool wxRegion::Subtract( const wxRegion& region )
{
    if (region.IsNull())
        return FALSE;

    if (!m_refData)
    {
        m_refData = new wxRegionRefData();
        M_REGIONDATA->m_region = gdk_region_new();
    }
    else
    {
        AllocExclusive();
    }

#ifdef __WXGTK20__
    gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
#else
    GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
    gdk_region_destroy( M_REGIONDATA->m_region );
    M_REGIONDATA->m_region = reg;
#endif

    return TRUE;
}

bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxRegion reg( x, y, width, height );
    return Xor( reg );
}

bool wxRegion::Xor( const wxRect& rect )
{
    wxRegion reg( rect );
    return Xor( reg );
}

bool wxRegion::Xor( const wxRegion& region )
{
    if (region.IsNull())
        return FALSE;

    if (!m_refData)
    {
        m_refData = new wxRegionRefData();
        M_REGIONDATA->m_region = gdk_region_new();
    }
    else
    {
        AllocExclusive();
    }

#ifdef __WXGTK20__
    gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
#else
    GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
    gdk_region_destroy( M_REGIONDATA->m_region );
    M_REGIONDATA->m_region = reg;
#endif

    return TRUE;
}

// ----------------------------------------------------------------------------
// wxRegion tests
// ----------------------------------------------------------------------------

void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
{
    if ( m_refData )
    {
        GdkRectangle rect;
        gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
        x = rect.x;
        y = rect.y;
        w = rect.width;
        h = rect.height;
    }
    else
    {
        x = 0;
        y = 0;
        w = -1;
        h = -1;
    }
}

wxRect wxRegion::GetBox() const
{
    wxCoord x, y, w, h;
    GetBox( x, y, w, h );
    return wxRect( x, y, w, h );
}

bool wxRegion::Offset( wxCoord x, wxCoord y )
{
    if (!m_refData)
        return FALSE;

    AllocExclusive();

    gdk_region_offset( M_REGIONDATA->m_region, x, y );

    return TRUE;
}

bool wxRegion::Empty() const
{
    if (!m_refData)
        return TRUE;

    return gdk_region_empty( M_REGIONDATA->m_region );
}

wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
{
    if (!m_refData)
        return wxOutRegion;

    if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
        return wxInRegion;
    else
        return wxOutRegion;
}

wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
{
    if (!m_refData)
        return wxOutRegion;

    GdkRectangle rect;
    rect.x = x;
    rect.y = y;
    rect.width = w;
    rect.height = h;
    GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
    switch (res)
    {
        case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
        case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
        case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
    }
    return wxOutRegion;
}

wxRegionContain wxRegion::Contains(const wxPoint& pt) const
{
    return Contains( pt.x, pt.y );
}

wxRegionContain wxRegion::Contains(const wxRect& rect) const
{
    return Contains( rect.x, rect.y, rect.width, rect.height );
}

GdkRegion *wxRegion::GetRegion() const
{
    if (!m_refData)
        return (GdkRegion*) NULL;

    return M_REGIONDATA->m_region;
}

// ----------------------------------------------------------------------------
// wxRegionIterator
// ----------------------------------------------------------------------------

#ifndef __WXGTK20__

// the following structures must match the private structures
// in X11 region code ( xc/lib/X11/region.h )

// this makes the Region type transparent
// and we have access to the region rectangles

#include <gdk/gdkprivate.h>

struct _XBox {
    short x1, x2, y1, y2;
};

struct _XRegion {
    long   size , numRects;
    _XBox *rects, extents;
};

#endif

class wxRIRefData: public wxObjectRefData
{
public:

    wxRIRefData() : m_rects(0), m_numRects(0){}
   ~wxRIRefData();

    wxRect *m_rects;
    size_t  m_numRects;

    void CreateRects( const wxRegion& r );
};

wxRIRefData::~wxRIRefData()
{
    delete m_rects;
}

void wxRIRefData::CreateRects( const wxRegion& region )
{
    if (m_rects)
      delete m_rects;

    m_rects = 0;
    m_numRects = 0;

    GdkRegion *gdkregion = region.GetRegion();
    if (!gdkregion) return;

#ifdef __WXGTK20__
    GdkRectangles *gdkrects = NULL;
    gint numRects = 0;
    gdk_region_get_rectangles( gdkregion, &gdkrect, &numRects );

    m_numRects = numRects;
    if (numRects)
    {
        m_rects = new wxRect[m_numRects];
        for (size_t i=0; i < m_numRects; ++i)
        {
            GdkRectangle &gr = gdkrects[i];
            wxRect &wr = m_rects[i];
            wr.x = gr.x;
            wr.y = gr.y;
            wr.width = gr.width;
            wr.height = gr.height;
        }
    }
    g_delete( gdkrects ); // delete []
#else
    Region r = ((GdkRegionPrivate *)gdkregion)->xregion;
    if (r)
    {
        m_numRects = r->numRects;
        if (m_numRects)
        {
            m_rects = new wxRect[m_numRects];
            for (size_t i=0; i < m_numRects; ++i)
            {
                _XBox &xr = r->rects[i];
                wxRect &wr = m_rects[i];
                wr.x = xr.x1;
                wr.y = xr.y1;
                wr.width = xr.x2-xr.x1;
                wr.height = xr.y2-xr.y1;
            }
        }
    }
#endif
}

wxRegionIterator::wxRegionIterator()
{
    m_refData = new wxRIRefData();
    Reset();
}

wxRegionIterator::wxRegionIterator( const wxRegion& region )
{
    m_refData = new wxRIRefData();
    Reset(region);
}

void wxRegionIterator::Reset( const wxRegion& region )
{
    m_region = region;
    ((wxRIRefData*)m_refData)->CreateRects(region);
    Reset();
}

bool wxRegionIterator::HaveRects() const
{
    return m_current < ((wxRIRefData*)m_refData)->m_numRects;
}

wxRegionIterator::operator bool () const
{
    return HaveRects();
}

void wxRegionIterator::operator ++ ()
{
    if (HaveRects()) ++m_current;
}

void wxRegionIterator::operator ++ (int)
{
    if (HaveRects()) ++m_current;
}

wxCoord wxRegionIterator::GetX() const
{
    if( !HaveRects() ) return 0;
    return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
}

wxCoord wxRegionIterator::GetY() const
{
    if( !HaveRects() ) return 0;
    return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
}

wxCoord wxRegionIterator::GetW() const
{
    if( !HaveRects() ) return -1;
    return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
}

wxCoord wxRegionIterator::GetH() const
{
    if( !HaveRects() ) return -1;
    return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
}

wxRect wxRegionIterator::GetRect() const
{
    wxRect r;
    if( HaveRects() )
        r = ((wxRIRefData*)m_refData)->m_rects[m_current];

    return r;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: gtk/region.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Modified: VZ at 05.10.00: use AllocExclusive(), comparison fixed
	6	// Id: $Id$
	7	// Copyright: (c) 1998 Robert Roebling
	8	// Licence: wxWindows licence
	9	/////////////////////////////////////////////////////////////////////////////
	10
	11	// ============================================================================
	12	// declarations
	13	// ============================================================================
	14
	15	#ifdef __GNUG__
	16	#pragma implementation "region.h"
	17	#endif
	18
	19	// ----------------------------------------------------------------------------
	20	// headers
	21	// ----------------------------------------------------------------------------
	22
	23	#include "wx/region.h"
	24
	25	#include <gdk/gdk.h>
	26	#include <gtk/gtk.h>
	27
	28	#include "wx/log.h"
	29
	30	// ----------------------------------------------------------------------------
	31	// wxRegionRefData: private class containing the information about the region
	32	// ----------------------------------------------------------------------------
	33
	34	class wxRegionRefData : public wxObjectRefData
	35	{
	36	public:
	37	wxRegionRefData()
	38	{
	39	m_region = NULL;
	40	}
	41
	42	wxRegionRefData(const wxRegionRefData& refData)
	43	{
	44	#ifdef __WXGTK20__
	45	m_region = gdk_region_copy(refData.m_region);
	46	#else
	47	m_region = gdk_region_new();
	48	GdkRegion *regCopy = gdk_regions_union(m_region, refData.m_region);
	49	gdk_region_destroy(m_region);
	50	m_region = regCopy;
	51	#endif
	52	}
	53
	54	~wxRegionRefData()
	55	{
	56	if (m_region)
	57	gdk_region_destroy( m_region );
	58	}
	59
	60	GdkRegion *m_region;
	61	};
	62
	63	// ----------------------------------------------------------------------------
	64	// macros
	65	// ----------------------------------------------------------------------------
	66
	67	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	68	#define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))
	69
	70	IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject);
	71	IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
	72
	73	// ----------------------------------------------------------------------------
	74	// wxRegion construction
	75	// ----------------------------------------------------------------------------
	76
	77	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	78
	79	void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
	80	{
	81	GdkRectangle rect;
	82	rect.x = x;
	83	rect.y = y;
	84	rect.width = w;
	85	rect.height = h;
	86
	87	m_refData = new wxRegionRefData();
	88
	89	#ifdef __WXGTK20__
	90	M_REGIONDATA->m_region = gdk_region_rectangle( rect );
	91	#else
	92	GdkRegion *reg = gdk_region_new();
	93	M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
	94	gdk_region_destroy( reg );
	95	#endif
	96	}
	97
	98	wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
	99	{
	100	GdkPoint *gdkpoints = new GdkPoint[n];
	101	for ( size_t i = 0 ; i < n ; i++ )
	102	{
	103	gdkpoints[i].x = points[i].x;
	104	gdkpoints[i].y = points[i].y;
	105	}
	106
	107	m_refData = new wxRegionRefData();
	108
	109	GdkRegion* reg = gdk_region_polygon
	110	(
	111	gdkpoints,
	112	n,
	113	fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
	114	: GDK_EVEN_ODD_RULE
	115	);
	116
	117	M_REGIONDATA->m_region = reg;
	118
	119	delete [] gdkpoints;
	120	}
	121
	122	wxRegion::~wxRegion()
	123	{
	124	// m_refData unrefed in ~wxObject
	125	}
	126
	127	wxObjectRefData *wxRegion::CreateRefData() const
	128	{
	129	return new wxRegionRefData;
	130	}
	131
	132	wxObjectRefData wxRegion::CloneRefData(const wxObjectRefData data) const
	133	{
	134	return new wxRegionRefData((wxRegionRefData )data);
	135	}
	136
	137	// ----------------------------------------------------------------------------
	138	// wxRegion comparison
	139	// ----------------------------------------------------------------------------
	140
	141	bool wxRegion::operator==( const wxRegion& region )
	142	{
	143	if (m_refData == region.m_refData) return TRUE;
	144
	145	if (!m_refData \|\| !region.m_refData) return FALSE;
	146
	147	// compare the regions themselves, not the pointers to ref data!
	148	return gdk_region_equal(M_REGIONDATA->m_region,
	149	M_REGIONDATA_OF(region)->m_region);
	150	}
	151
	152	// ----------------------------------------------------------------------------
	153	// wxRegion operations
	154	// ----------------------------------------------------------------------------
	155
	156	void wxRegion::Clear()
	157	{
	158	UnRef();
	159	}
	160
	161	bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	162	{
	163	GdkRectangle rect;
	164	rect.x = x;
	165	rect.y = y;
	166	rect.width = width;
	167	rect.height = height;
	168
	169	if (!m_refData)
	170	{
	171	m_refData = new wxRegionRefData();
	172	#ifdef __WXGTK20__
	173	M_REGIONDATA->m_region = gdk_region_rectangle( rect );
	174	#else
	175	GdkRegion *reg = gdk_region_new();
	176	M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
	177	gdk_region_destroy( reg );
	178	#endif
	179	}
	180	else
	181	{
	182	AllocExclusive();
	183
	184	#ifdef __WXGTK20__
	185	gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	186	#else
	187	GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	188	gdk_region_destroy( M_REGIONDATA->m_region );
	189	M_REGIONDATA->m_region = reg;
	190	#endif
	191	}
	192
	193	return TRUE;
	194	}
	195
	196	bool wxRegion::Union( const wxRect& rect )
	197	{
	198	return Union( rect.x, rect.y, rect.width, rect.height );
	199	}
	200
	201	bool wxRegion::Union( const wxRegion& region )
	202	{
	203	if (region.IsNull())
	204	return FALSE;
	205
	206	if (!m_refData)
	207	{
	208	m_refData = new wxRegionRefData();
	209	M_REGIONDATA->m_region = gdk_region_new();
	210	}
	211	else
	212	{
	213	AllocExclusive();
	214	}
	215
	216	#ifdef __WXGTK20__
	217	gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
	218	#else
	219	GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
	220	gdk_region_destroy( M_REGIONDATA->m_region );
	221	M_REGIONDATA->m_region = reg;
	222	#endif
	223
	224	return TRUE;
	225	}
	226
	227	bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	228	{
	229	wxRegion reg( x, y, width, height );
	230
	231	return Intersect( reg );
	232	}
	233
	234	bool wxRegion::Intersect( const wxRect& rect )
	235	{
	236	wxRegion reg( rect );
	237
	238	return Intersect( reg );
	239	}
	240
	241	bool wxRegion::Intersect( const wxRegion& region )
	242	{
	243	if (region.IsNull())
	244	return FALSE;
	245
	246	if (!m_refData)
	247	{
	248	m_refData = new wxRegionRefData();
	249	M_REGIONDATA->m_region = gdk_region_new();
	250
	251	// leave here
	252	return TRUE;
	253	}
	254	else
	255	{
	256	AllocExclusive();
	257	}
	258
	259	#ifdef __WXGTK20__
	260	gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	261	#else
	262	GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	263	gdk_region_destroy( M_REGIONDATA->m_region );
	264	M_REGIONDATA->m_region = reg;
	265	#endif
	266
	267	return TRUE;
	268	}
	269
	270	bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	271	{
	272	wxRegion reg( x, y, width, height );
	273	return Subtract( reg );
	274	}
	275
	276	bool wxRegion::Subtract( const wxRect& rect )
	277	{
	278	wxRegion reg( rect );
	279	return Subtract( reg );
	280	}
	281
	282	bool wxRegion::Subtract( const wxRegion& region )
	283	{
	284	if (region.IsNull())
	285	return FALSE;
	286
	287	if (!m_refData)
	288	{
	289	m_refData = new wxRegionRefData();
	290	M_REGIONDATA->m_region = gdk_region_new();
	291	}
	292	else
	293	{
	294	AllocExclusive();
	295	}
	296
	297	#ifdef __WXGTK20__
	298	gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	299	#else
	300	GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	301	gdk_region_destroy( M_REGIONDATA->m_region );
	302	M_REGIONDATA->m_region = reg;
	303	#endif
	304
	305	return TRUE;
	306	}
	307
	308	bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	309	{
	310	wxRegion reg( x, y, width, height );
	311	return Xor( reg );
	312	}
	313
	314	bool wxRegion::Xor( const wxRect& rect )
	315	{
	316	wxRegion reg( rect );
	317	return Xor( reg );
	318	}
	319
	320	bool wxRegion::Xor( const wxRegion& region )
	321	{
	322	if (region.IsNull())
	323	return FALSE;
	324
	325	if (!m_refData)
	326	{
	327	m_refData = new wxRegionRefData();
	328	M_REGIONDATA->m_region = gdk_region_new();
	329	}
	330	else
	331	{
	332	AllocExclusive();
	333	}
	334
	335	#ifdef __WXGTK20__
	336	gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
	337	#else
	338	GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
	339	gdk_region_destroy( M_REGIONDATA->m_region );
	340	M_REGIONDATA->m_region = reg;
	341	#endif
	342
	343	return TRUE;
	344	}
	345
	346	// ----------------------------------------------------------------------------
	347	// wxRegion tests
	348	// ----------------------------------------------------------------------------
	349
	350	void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
	351	{
	352	if ( m_refData )
	353	{
	354	GdkRectangle rect;
	355	gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
	356	x = rect.x;
	357	y = rect.y;
	358	w = rect.width;
	359	h = rect.height;
	360	}
	361	else
	362	{
	363	x = 0;
	364	y = 0;
	365	w = -1;
	366	h = -1;
	367	}
	368	}
	369
	370	wxRect wxRegion::GetBox() const
	371	{
	372	wxCoord x, y, w, h;
	373	GetBox( x, y, w, h );
	374	return wxRect( x, y, w, h );
	375	}
	376
	377	bool wxRegion::Offset( wxCoord x, wxCoord y )
	378	{
	379	if (!m_refData)
	380	return FALSE;
	381
	382	AllocExclusive();
	383
	384	gdk_region_offset( M_REGIONDATA->m_region, x, y );
	385
	386	return TRUE;
	387	}
	388
	389	bool wxRegion::Empty() const
	390	{
	391	if (!m_refData)
	392	return TRUE;
	393
	394	return gdk_region_empty( M_REGIONDATA->m_region );
	395	}
	396
	397	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
	398	{
	399	if (!m_refData)
	400	return wxOutRegion;
	401
	402	if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
	403	return wxInRegion;
	404	else
	405	return wxOutRegion;
	406	}
	407
	408	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
	409	{
	410	if (!m_refData)
	411	return wxOutRegion;
	412
	413	GdkRectangle rect;
	414	rect.x = x;
	415	rect.y = y;
	416	rect.width = w;
	417	rect.height = h;
	418	GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
	419	switch (res)
	420	{
	421	case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion;
	422	case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion;
	423	case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
	424	}
	425	return wxOutRegion;
	426	}
	427
	428	wxRegionContain wxRegion::Contains(const wxPoint& pt) const
	429	{
	430	return Contains( pt.x, pt.y );
	431	}
	432
	433	wxRegionContain wxRegion::Contains(const wxRect& rect) const
	434	{
	435	return Contains( rect.x, rect.y, rect.width, rect.height );
	436	}
	437
	438	GdkRegion *wxRegion::GetRegion() const
	439	{
	440	if (!m_refData)
	441	return (GdkRegion*) NULL;
	442
	443	return M_REGIONDATA->m_region;
	444	}
	445
	446	// ----------------------------------------------------------------------------
	447	// wxRegionIterator
	448	// ----------------------------------------------------------------------------
	449
	450	#ifndef __WXGTK20__
	451
	452	// the following structures must match the private structures
	453	// in X11 region code ( xc/lib/X11/region.h )
	454
	455	// this makes the Region type transparent
	456	// and we have access to the region rectangles
	457
	458	#include <gdk/gdkprivate.h>
	459
	460	struct _XBox {
	461	short x1, x2, y1, y2;
	462	};
	463
	464	struct _XRegion {
	465	long size , numRects;
	466	_XBox *rects, extents;
	467	};
	468
	469	#endif
	470
	471	class wxRIRefData: public wxObjectRefData
	472	{
	473	public:
	474
	475	wxRIRefData() : m_rects(0), m_numRects(0){}
	476	~wxRIRefData();
	477
	478	wxRect *m_rects;
	479	size_t m_numRects;
	480
	481	void CreateRects( const wxRegion& r );
	482	};
	483
	484	wxRIRefData::~wxRIRefData()
	485	{
	486	delete m_rects;
	487	}
	488
	489	void wxRIRefData::CreateRects( const wxRegion& region )
	490	{
	491	if (m_rects)
	492	delete m_rects;
	493
	494	m_rects = 0;
	495	m_numRects = 0;
	496
	497	GdkRegion *gdkregion = region.GetRegion();
	498	if (!gdkregion) return;
	499
	500	#ifdef __WXGTK20__
	501	GdkRectangles *gdkrects = NULL;
	502	gint numRects = 0;
	503	gdk_region_get_rectangles( gdkregion, &gdkrect, &numRects );
	504
	505	m_numRects = numRects;
	506	if (numRects)
	507	{
	508	m_rects = new wxRect[m_numRects];
	509	for (size_t i=0; i < m_numRects; ++i)
	510	{
	511	GdkRectangle &gr = gdkrects[i];
	512	wxRect &wr = m_rects[i];
	513	wr.x = gr.x;
	514	wr.y = gr.y;
	515	wr.width = gr.width;
	516	wr.height = gr.height;
	517	}
	518	}
	519	g_delete( gdkrects ); // delete []
	520	#else
	521	Region r = ((GdkRegionPrivate *)gdkregion)->xregion;
	522	if (r)
	523	{
	524	m_numRects = r->numRects;
	525	if (m_numRects)
	526	{
	527	m_rects = new wxRect[m_numRects];
	528	for (size_t i=0; i < m_numRects; ++i)
	529	{
	530	_XBox &xr = r->rects[i];
	531	wxRect &wr = m_rects[i];
	532	wr.x = xr.x1;
	533	wr.y = xr.y1;
	534	wr.width = xr.x2-xr.x1;
	535	wr.height = xr.y2-xr.y1;
	536	}
	537	}
	538	}
	539	#endif
	540	}
	541
	542	wxRegionIterator::wxRegionIterator()
	543	{
	544	m_refData = new wxRIRefData();
	545	Reset();
	546	}
	547
	548	wxRegionIterator::wxRegionIterator( const wxRegion& region )
	549	{
	550	m_refData = new wxRIRefData();
	551	Reset(region);
	552	}
	553
	554	void wxRegionIterator::Reset( const wxRegion& region )
	555	{
	556	m_region = region;
	557	((wxRIRefData*)m_refData)->CreateRects(region);
	558	Reset();
	559	}
	560
	561	bool wxRegionIterator::HaveRects() const
	562	{
	563	return m_current < ((wxRIRefData*)m_refData)->m_numRects;
	564	}
	565
	566	wxRegionIterator::operator bool () const
	567	{
	568	return HaveRects();
	569	}
	570
	571	void wxRegionIterator::operator ++ ()
	572	{
	573	if (HaveRects()) ++m_current;
	574	}
	575
	576	void wxRegionIterator::operator ++ (int)
	577	{
	578	if (HaveRects()) ++m_current;
	579	}
	580
	581	wxCoord wxRegionIterator::GetX() const
	582	{
	583	if( !HaveRects() ) return 0;
	584	return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
	585	}
	586
	587	wxCoord wxRegionIterator::GetY() const
	588	{
	589	if( !HaveRects() ) return 0;
	590	return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
	591	}
	592
	593	wxCoord wxRegionIterator::GetW() const
	594	{
	595	if( !HaveRects() ) return -1;
	596	return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
	597	}
	598
	599	wxCoord wxRegionIterator::GetH() const
	600	{
	601	if( !HaveRects() ) return -1;
	602	return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
	603	}
	604
	605	wxRect wxRegionIterator::GetRect() const
	606	{
	607	wxRect r;
	608	if( HaveRects() )
	609	r = ((wxRIRefData*)m_refData)->m_rects[m_current];
	610
	611	return r;
	612	}
	613