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/log.h"

#include "wx/region.h"

#include "wx/gtk/private.h"

#ifndef __WXGTK20__

// ----------------------------------------------------------------------------
// wxGdkRegion: creates a new region in ctor and destroys in dtor
// ----------------------------------------------------------------------------

class wxGdkRegion
{
public:
    wxGdkRegion() { m_region = gdk_region_new(); }
    ~wxGdkRegion() { gdk_region_destroy(m_region); }

    operator GdkRegion *() const { return m_region; }

private:
    GdkRegion *m_region;
};

#endif // __WXGTK20__

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

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

    wxRegionRefData(const wxRegionRefData& refData)
        : wxObjectRefData()
    {
#ifdef __WXGTK20__
        m_region = gdk_region_copy(refData.m_region);
#else
        m_region = gdk_regions_union(wxGdkRegion(), refData.m_region);
#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
    M_REGIONDATA->m_region = gdk_region_union_with_rect( wxGdkRegion(), &rect );
#endif
}

wxRegion::wxRegion( GdkRegion *region )
{
    m_refData = new wxRegionRefData();
#ifdef __WXGTK20__
    M_REGIONDATA->m_region = gdk_region_copy( region );
#else
    M_REGIONDATA->m_region = gdk_regions_union(wxGdkRegion(), region);
#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 )
{
    // workaround for a strange GTK/X11 bug: taking union with an empty
    // rectangle results in an empty region which is definitely not what we
    // want
    if ( !width || !height )
        return TRUE;

    if ( !m_refData )
    {
        InitRect(x, y, width, height);
    }
    else
    {
        AllocExclusive();

        GdkRectangle rect;
        rect.x = x;
        rect.y = y;
        rect.width = width;
        rect.height = height;

#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)
    {
        // intersecting with invalid region doesn't make sense
        return FALSE;
    }

    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)
    {
        // subtracting from an invalid region doesn't make sense
        return FALSE;
    }

    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)
    {
        return FALSE;
    }

    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;
}

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

    AllocExclusive();

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

    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::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 // GTK+ 1.x

class wxRIRefData: public wxObjectRefData
{
public:
    wxRIRefData() { Init(); }
    virtual ~wxRIRefData();

    void CreateRects( const wxRegion& r );

    void Init() { m_rects = NULL; m_numRects = 0; }

    wxRect *m_rects;
    size_t  m_numRects;
};

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

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

    Init();

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

#ifdef __WXGTK20__
    GdkRectangle *gdkrects = NULL;
    gint numRects = 0;
    gdk_region_get_rectangles( gdkregion, &gdkrects, &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_free( gdkrects );
#else // GTK+ 1.x
    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 // GTK+ 2.0/1.x
}

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& wxRegionIterator::operator ++ ()
{
    if (HaveRects())
        ++m_current;

    return *this;
}

wxRegionIterator wxRegionIterator::operator ++ (int)
{
    wxRegionIterator tmp = *this;
    if (HaveRects())
        ++m_current;

    return tmp;
}

wxCoord wxRegionIterator::GetX() const
{
    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );

    return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
}

wxCoord wxRegionIterator::GetY() const
{
    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );

    return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
}

wxCoord wxRegionIterator::GetW() const
{
    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );

    return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
}

wxCoord wxRegionIterator::GetH() const
{
    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );

    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/log.h"
	24
	25	#include "wx/region.h"
	26
	27	#include "wx/gtk/private.h"
	28
	29	#ifndef __WXGTK20__
	30
	31	// ----------------------------------------------------------------------------
	32	// wxGdkRegion: creates a new region in ctor and destroys in dtor
	33	// ----------------------------------------------------------------------------
	34
	35	class wxGdkRegion
	36	{
	37	public:
	38	wxGdkRegion() { m_region = gdk_region_new(); }
	39	~wxGdkRegion() { gdk_region_destroy(m_region); }
	40
	41	operator GdkRegion *() const { return m_region; }
	42
	43	private:
	44	GdkRegion *m_region;
	45	};
	46
	47	#endif // __WXGTK20__
	48
	49	// ----------------------------------------------------------------------------
	50	// wxRegionRefData: private class containing the information about the region
	51	// ----------------------------------------------------------------------------
	52
	53	class wxRegionRefData : public wxObjectRefData
	54	{
	55	public:
	56	wxRegionRefData()
	57	{
	58	m_region = NULL;
	59	}
	60
	61	wxRegionRefData(const wxRegionRefData& refData)
	62	: wxObjectRefData()
	63	{
	64	#ifdef __WXGTK20__
	65	m_region = gdk_region_copy(refData.m_region);
	66	#else
	67	m_region = gdk_regions_union(wxGdkRegion(), refData.m_region);
	68	#endif
	69	}
	70
	71	~wxRegionRefData()
	72	{
	73	if (m_region)
	74	gdk_region_destroy( m_region );
	75	}
	76
	77	GdkRegion *m_region;
	78	};
	79
	80	// ----------------------------------------------------------------------------
	81	// macros
	82	// ----------------------------------------------------------------------------
	83
	84	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	85	#define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))
	86
	87	IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
	88	IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)
	89
	90	// ----------------------------------------------------------------------------
	91	// wxRegion construction
	92	// ----------------------------------------------------------------------------
	93
	94	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	95
	96	void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
	97	{
	98	GdkRectangle rect;
	99	rect.x = x;
	100	rect.y = y;
	101	rect.width = w;
	102	rect.height = h;
	103
	104	m_refData = new wxRegionRefData();
	105
	106	#ifdef __WXGTK20__
	107	M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
	108	#else
	109	M_REGIONDATA->m_region = gdk_region_union_with_rect( wxGdkRegion(), &rect );
	110	#endif
	111	}
	112
	113	wxRegion::wxRegion( GdkRegion *region )
	114	{
	115	m_refData = new wxRegionRefData();
	116	#ifdef __WXGTK20__
	117	M_REGIONDATA->m_region = gdk_region_copy( region );
	118	#else
	119	M_REGIONDATA->m_region = gdk_regions_union(wxGdkRegion(), region);
	120	#endif
	121	}
	122
	123	wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
	124	{
	125	GdkPoint *gdkpoints = new GdkPoint[n];
	126	for ( size_t i = 0 ; i < n ; i++ )
	127	{
	128	gdkpoints[i].x = points[i].x;
	129	gdkpoints[i].y = points[i].y;
	130	}
	131
	132	m_refData = new wxRegionRefData();
	133
	134	GdkRegion* reg = gdk_region_polygon
	135	(
	136	gdkpoints,
	137	n,
	138	fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
	139	: GDK_EVEN_ODD_RULE
	140	);
	141
	142	M_REGIONDATA->m_region = reg;
	143
	144	delete [] gdkpoints;
	145	}
	146
	147	wxRegion::~wxRegion()
	148	{
	149	// m_refData unrefed in ~wxObject
	150	}
	151
	152	wxObjectRefData *wxRegion::CreateRefData() const
	153	{
	154	return new wxRegionRefData;
	155	}
	156
	157	wxObjectRefData wxRegion::CloneRefData(const wxObjectRefData data) const
	158	{
	159	return new wxRegionRefData((wxRegionRefData )data);
	160	}
	161
	162	// ----------------------------------------------------------------------------
	163	// wxRegion comparison
	164	// ----------------------------------------------------------------------------
	165
	166	bool wxRegion::operator==( const wxRegion& region )
	167	{
	168	if (m_refData == region.m_refData) return TRUE;
	169
	170	if (!m_refData \|\| !region.m_refData) return FALSE;
	171
	172	// compare the regions themselves, not the pointers to ref data!
	173	return gdk_region_equal(M_REGIONDATA->m_region,
	174	M_REGIONDATA_OF(region)->m_region);
	175	}
	176
	177	// ----------------------------------------------------------------------------
	178	// wxRegion operations
	179	// ----------------------------------------------------------------------------
	180
	181	void wxRegion::Clear()
	182	{
	183	UnRef();
	184	}
	185
	186	bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	187	{
	188	// workaround for a strange GTK/X11 bug: taking union with an empty
	189	// rectangle results in an empty region which is definitely not what we
	190	// want
	191	if ( !width \|\| !height )
	192	return TRUE;
	193
	194	if ( !m_refData )
	195	{
	196	InitRect(x, y, width, height);
	197	}
	198	else
	199	{
	200	AllocExclusive();
	201
	202	GdkRectangle rect;
	203	rect.x = x;
	204	rect.y = y;
	205	rect.width = width;
	206	rect.height = height;
	207
	208	#ifdef __WXGTK20__
	209	gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	210	#else
	211	GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	212	gdk_region_destroy( M_REGIONDATA->m_region );
	213	M_REGIONDATA->m_region = reg;
	214	#endif
	215	}
	216
	217	return TRUE;
	218	}
	219
	220	bool wxRegion::Union( const wxRect& rect )
	221	{
	222	return Union( rect.x, rect.y, rect.width, rect.height );
	223	}
	224
	225	bool wxRegion::Union( const wxRegion& region )
	226	{
	227	if (region.IsNull())
	228	return FALSE;
	229
	230	if (!m_refData)
	231	{
	232	m_refData = new wxRegionRefData();
	233	M_REGIONDATA->m_region = gdk_region_new();
	234	}
	235	else
	236	{
	237	AllocExclusive();
	238	}
	239
	240	#ifdef __WXGTK20__
	241	gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
	242	#else
	243	GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
	244	gdk_region_destroy( M_REGIONDATA->m_region );
	245	M_REGIONDATA->m_region = reg;
	246	#endif
	247
	248	return TRUE;
	249	}
	250
	251	bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	252	{
	253	wxRegion reg( x, y, width, height );
	254
	255	return Intersect( reg );
	256	}
	257
	258	bool wxRegion::Intersect( const wxRect& rect )
	259	{
	260	wxRegion reg( rect );
	261
	262	return Intersect( reg );
	263	}
	264
	265	bool wxRegion::Intersect( const wxRegion& region )
	266	{
	267	if (region.IsNull())
	268	return FALSE;
	269
	270	if (!m_refData)
	271	{
	272	// intersecting with invalid region doesn't make sense
	273	return FALSE;
	274	}
	275
	276	AllocExclusive();
	277
	278	#ifdef __WXGTK20__
	279	gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	280	#else
	281	GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	282	gdk_region_destroy( M_REGIONDATA->m_region );
	283	M_REGIONDATA->m_region = reg;
	284	#endif
	285
	286	return TRUE;
	287	}
	288
	289	bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	290	{
	291	wxRegion reg( x, y, width, height );
	292	return Subtract( reg );
	293	}
	294
	295	bool wxRegion::Subtract( const wxRect& rect )
	296	{
	297	wxRegion reg( rect );
	298	return Subtract( reg );
	299	}
	300
	301	bool wxRegion::Subtract( const wxRegion& region )
	302	{
	303	if (region.IsNull())
	304	return FALSE;
	305
	306	if (!m_refData)
	307	{
	308	// subtracting from an invalid region doesn't make sense
	309	return FALSE;
	310	}
	311
	312	AllocExclusive();
	313
	314	#ifdef __WXGTK20__
	315	gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	316	#else
	317	GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	318	gdk_region_destroy( M_REGIONDATA->m_region );
	319	M_REGIONDATA->m_region = reg;
	320	#endif
	321
	322	return TRUE;
	323	}
	324
	325	bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	326	{
	327	wxRegion reg( x, y, width, height );
	328	return Xor( reg );
	329	}
	330
	331	bool wxRegion::Xor( const wxRect& rect )
	332	{
	333	wxRegion reg( rect );
	334	return Xor( reg );
	335	}
	336
	337	bool wxRegion::Xor( const wxRegion& region )
	338	{
	339	if (region.IsNull())
	340	return FALSE;
	341
	342	if (!m_refData)
	343	{
	344	return FALSE;
	345	}
	346
	347	AllocExclusive();
	348
	349	#ifdef __WXGTK20__
	350	gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
	351	#else
	352	GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
	353	gdk_region_destroy( M_REGIONDATA->m_region );
	354	M_REGIONDATA->m_region = reg;
	355	#endif
	356
	357	return TRUE;
	358	}
	359
	360	bool wxRegion::Offset( wxCoord x, wxCoord y )
	361	{
	362	if (!m_refData)
	363	return FALSE;
	364
	365	AllocExclusive();
	366
	367	gdk_region_offset( M_REGIONDATA->m_region, x, y );
	368
	369	return TRUE;
	370	}
	371
	372	// ----------------------------------------------------------------------------
	373	// wxRegion tests
	374	// ----------------------------------------------------------------------------
	375
	376	void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
	377	{
	378	if ( m_refData )
	379	{
	380	GdkRectangle rect;
	381	gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
	382	x = rect.x;
	383	y = rect.y;
	384	w = rect.width;
	385	h = rect.height;
	386	}
	387	else
	388	{
	389	x = 0;
	390	y = 0;
	391	w = -1;
	392	h = -1;
	393	}
	394	}
	395
	396	wxRect wxRegion::GetBox() const
	397	{
	398	wxCoord x, y, w, h;
	399	GetBox( x, y, w, h );
	400	return wxRect( x, y, w, h );
	401	}
	402
	403	bool wxRegion::Empty() const
	404	{
	405	if (!m_refData)
	406	return TRUE;
	407
	408	return gdk_region_empty( M_REGIONDATA->m_region );
	409	}
	410
	411	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
	412	{
	413	if (!m_refData)
	414	return wxOutRegion;
	415
	416	if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
	417	return wxInRegion;
	418	else
	419	return wxOutRegion;
	420	}
	421
	422	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
	423	{
	424	if (!m_refData)
	425	return wxOutRegion;
	426
	427	GdkRectangle rect;
	428	rect.x = x;
	429	rect.y = y;
	430	rect.width = w;
	431	rect.height = h;
	432	GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
	433	switch (res)
	434	{
	435	case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion;
	436	case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion;
	437	case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
	438	}
	439	return wxOutRegion;
	440	}
	441
	442	wxRegionContain wxRegion::Contains(const wxPoint& pt) const
	443	{
	444	return Contains( pt.x, pt.y );
	445	}
	446
	447	wxRegionContain wxRegion::Contains(const wxRect& rect) const
	448	{
	449	return Contains( rect.x, rect.y, rect.width, rect.height );
	450	}
	451
	452	GdkRegion *wxRegion::GetRegion() const
	453	{
	454	if (!m_refData)
	455	return (GdkRegion*) NULL;
	456
	457	return M_REGIONDATA->m_region;
	458	}
	459
	460	// ----------------------------------------------------------------------------
	461	// wxRegionIterator
	462	// ----------------------------------------------------------------------------
	463
	464	#ifndef __WXGTK20__
	465
	466	// the following structures must match the private structures
	467	// in X11 region code ( xc/lib/X11/region.h )
	468
	469	// this makes the Region type transparent
	470	// and we have access to the region rectangles
	471
	472	#include <gdk/gdkprivate.h>
	473
	474	struct _XBox {
	475	short x1, x2, y1, y2;
	476	};
	477
	478	struct _XRegion {
	479	long size , numRects;
	480	_XBox *rects, extents;
	481	};
	482
	483	#endif // GTK+ 1.x
	484
	485	class wxRIRefData: public wxObjectRefData
	486	{
	487	public:
	488	wxRIRefData() { Init(); }
	489	virtual ~wxRIRefData();
	490
	491	void CreateRects( const wxRegion& r );
	492
	493	void Init() { m_rects = NULL; m_numRects = 0; }
	494
	495	wxRect *m_rects;
	496	size_t m_numRects;
	497	};
	498
	499	wxRIRefData::~wxRIRefData()
	500	{
	501	delete [] m_rects;
	502	}
	503
	504	void wxRIRefData::CreateRects( const wxRegion& region )
	505	{
	506	delete [] m_rects;
	507
	508	Init();
	509
	510	GdkRegion *gdkregion = region.GetRegion();
	511	if (!gdkregion)
	512	return;
	513
	514	#ifdef __WXGTK20__
	515	GdkRectangle *gdkrects = NULL;
	516	gint numRects = 0;
	517	gdk_region_get_rectangles( gdkregion, &gdkrects, &numRects );
	518
	519	m_numRects = numRects;
	520	if (numRects)
	521	{
	522	m_rects = new wxRect[m_numRects];
	523	for (size_t i=0; i < m_numRects; ++i)
	524	{
	525	GdkRectangle &gr = gdkrects[i];
	526	wxRect &wr = m_rects[i];
	527	wr.x = gr.x;
	528	wr.y = gr.y;
	529	wr.width = gr.width;
	530	wr.height = gr.height;
	531	}
	532	}
	533	g_free( gdkrects );
	534	#else // GTK+ 1.x
	535	Region r = ((GdkRegionPrivate *)gdkregion)->xregion;
	536	if (r)
	537	{
	538	m_numRects = r->numRects;
	539	if (m_numRects)
	540	{
	541	m_rects = new wxRect[m_numRects];
	542	for (size_t i=0; i < m_numRects; ++i)
	543	{
	544	_XBox &xr = r->rects[i];
	545	wxRect &wr = m_rects[i];
	546	wr.x = xr.x1;
	547	wr.y = xr.y1;
	548	wr.width = xr.x2-xr.x1;
	549	wr.height = xr.y2-xr.y1;
	550	}
	551	}
	552	}
	553	#endif // GTK+ 2.0/1.x
	554	}
	555
	556	wxRegionIterator::wxRegionIterator()
	557	{
	558	m_refData = new wxRIRefData();
	559	Reset();
	560	}
	561
	562	wxRegionIterator::wxRegionIterator( const wxRegion& region )
	563	{
	564	m_refData = new wxRIRefData();
	565	Reset(region);
	566	}
	567
	568	void wxRegionIterator::Reset( const wxRegion& region )
	569	{
	570	m_region = region;
	571	((wxRIRefData*)m_refData)->CreateRects(region);
	572	Reset();
	573	}
	574
	575	bool wxRegionIterator::HaveRects() const
	576	{
	577	return m_current < ((wxRIRefData*)m_refData)->m_numRects;
	578	}
	579
	580	wxRegionIterator& wxRegionIterator::operator ++ ()
	581	{
	582	if (HaveRects())
	583	++m_current;
	584
	585	return *this;
	586	}
	587
	588	wxRegionIterator wxRegionIterator::operator ++ (int)
	589	{
	590	wxRegionIterator tmp = *this;
	591	if (HaveRects())
	592	++m_current;
	593
	594	return tmp;
	595	}
	596
	597	wxCoord wxRegionIterator::GetX() const
	598	{
	599	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	600
	601	return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
	602	}
	603
	604	wxCoord wxRegionIterator::GetY() const
	605	{
	606	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	607
	608	return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
	609	}
	610
	611	wxCoord wxRegionIterator::GetW() const
	612	{
	613	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	614
	615	return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
	616	}
	617
	618	wxCoord wxRegionIterator::GetH() const
	619	{
	620	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	621
	622	return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
	623	}
	624
	625	wxRect wxRegionIterator::GetRect() const
	626	{
	627	wxRect r;
	628	if( HaveRects() )
	629	r = ((wxRIRefData*)m_refData)->m_rects[m_current];
	630
	631	return r;
	632	}
	633