src/gtk1/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
// ============================================================================

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

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#include "wx/region.h"
#include "wx/log.h"
#include "wx/gtk1/private.h"


// ----------------------------------------------------------------------------
// 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;
};


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

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

    wxRegionRefData(const wxRegionRefData& refData)
        : wxObjectRefData()
    {
        m_region = gdk_regions_union(wxGdkRegion(), refData.m_region);
    }

    ~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();

    M_REGIONDATA->m_region = gdk_region_union_with_rect( wxGdkRegion(), &rect );
}

wxRegion::wxRegion( GdkRegion *region )
{
    m_refData = new wxRegionRefData();
    M_REGIONDATA->m_region = gdk_regions_union(wxGdkRegion(), region);
}

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 ) const
{
    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;

        GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
        gdk_region_destroy( M_REGIONDATA->m_region );
        M_REGIONDATA->m_region = reg;
    }

    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();
    }

    GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
    gdk_region_destroy( M_REGIONDATA->m_region );
    M_REGIONDATA->m_region = reg;

    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();

    GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
    gdk_region_destroy( M_REGIONDATA->m_region );
    M_REGIONDATA->m_region = reg;

    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();

    GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
    gdk_region_destroy( M_REGIONDATA->m_region );
    M_REGIONDATA->m_region = reg;

    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();

    GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
    gdk_region_destroy( M_REGIONDATA->m_region );
    M_REGIONDATA->m_region = reg;

    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
// ----------------------------------------------------------------------------

// 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;
};


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;

    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;
            }
        }
    }
}

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	// ----------------------------------------------------------------------------
	16	// headers
	17	// ----------------------------------------------------------------------------
	18
	19	// For compilers that support precompilation, includes "wx.h".
	20	#include "wx/wxprec.h"
	21
	22	#include "wx/region.h"
	23	#include "wx/log.h"
	24	#include "wx/gtk1/private.h"
	25
	26
	27	// ----------------------------------------------------------------------------
	28	// wxGdkRegion: creates a new region in ctor and destroys in dtor
	29	// ----------------------------------------------------------------------------
	30
	31	class wxGdkRegion
	32	{
	33	public:
	34	wxGdkRegion() { m_region = gdk_region_new(); }
	35	~wxGdkRegion() { gdk_region_destroy(m_region); }
	36
	37	operator GdkRegion *() const { return m_region; }
	38
	39	private:
	40	GdkRegion *m_region;
	41	};
	42
	43
	44	// ----------------------------------------------------------------------------
	45	// wxRegionRefData: private class containing the information about the region
	46	// ----------------------------------------------------------------------------
	47
	48	class wxRegionRefData : public wxObjectRefData
	49	{
	50	public:
	51	wxRegionRefData()
	52	{
	53	m_region = NULL;
	54	}
	55
	56	wxRegionRefData(const wxRegionRefData& refData)
	57	: wxObjectRefData()
	58	{
	59	m_region = gdk_regions_union(wxGdkRegion(), refData.m_region);
	60	}
	61
	62	~wxRegionRefData()
	63	{
	64	if (m_region)
	65	gdk_region_destroy( m_region );
	66	}
	67
	68	GdkRegion *m_region;
	69	};
	70
	71	// ----------------------------------------------------------------------------
	72	// macros
	73	// ----------------------------------------------------------------------------
	74
	75	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	76	#define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))
	77
	78	IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
	79	IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)
	80
	81	// ----------------------------------------------------------------------------
	82	// wxRegion construction
	83	// ----------------------------------------------------------------------------
	84
	85	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	86
	87	void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
	88	{
	89	GdkRectangle rect;
	90	rect.x = x;
	91	rect.y = y;
	92	rect.width = w;
	93	rect.height = h;
	94
	95	m_refData = new wxRegionRefData();
	96
	97	M_REGIONDATA->m_region = gdk_region_union_with_rect( wxGdkRegion(), &rect );
	98	}
	99
	100	wxRegion::wxRegion( GdkRegion *region )
	101	{
	102	m_refData = new wxRegionRefData();
	103	M_REGIONDATA->m_region = gdk_regions_union(wxGdkRegion(), region);
	104	}
	105
	106	wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
	107	{
	108	GdkPoint *gdkpoints = new GdkPoint[n];
	109	for ( size_t i = 0 ; i < n ; i++ )
	110	{
	111	gdkpoints[i].x = points[i].x;
	112	gdkpoints[i].y = points[i].y;
	113	}
	114
	115	m_refData = new wxRegionRefData();
	116
	117	GdkRegion* reg = gdk_region_polygon
	118	(
	119	gdkpoints,
	120	n,
	121	fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
	122	: GDK_EVEN_ODD_RULE
	123	);
	124
	125	M_REGIONDATA->m_region = reg;
	126
	127	delete [] gdkpoints;
	128	}
	129
	130	wxRegion::~wxRegion()
	131	{
	132	// m_refData unrefed in ~wxObject
	133	}
	134
	135	wxObjectRefData *wxRegion::CreateRefData() const
	136	{
	137	return new wxRegionRefData;
	138	}
	139
	140	wxObjectRefData wxRegion::CloneRefData(const wxObjectRefData data) const
	141	{
	142	return new wxRegionRefData((wxRegionRefData )data);
	143	}
	144
	145	// ----------------------------------------------------------------------------
	146	// wxRegion comparison
	147	// ----------------------------------------------------------------------------
	148
	149	bool wxRegion::operator==( const wxRegion& region ) const
	150	{
	151	if (m_refData == region.m_refData) return TRUE;
	152
	153	if (!m_refData \|\| !region.m_refData) return FALSE;
	154
	155	// compare the regions themselves, not the pointers to ref data!
	156	return gdk_region_equal(M_REGIONDATA->m_region,
	157	M_REGIONDATA_OF(region)->m_region);
	158	}
	159
	160	// ----------------------------------------------------------------------------
	161	// wxRegion operations
	162	// ----------------------------------------------------------------------------
	163
	164	void wxRegion::Clear()
	165	{
	166	UnRef();
	167	}
	168
	169	bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	170	{
	171	// workaround for a strange GTK/X11 bug: taking union with an empty
	172	// rectangle results in an empty region which is definitely not what we
	173	// want
	174	if ( !width \|\| !height )
	175	return TRUE;
	176
	177	if ( !m_refData )
	178	{
	179	InitRect(x, y, width, height);
	180	}
	181	else
	182	{
	183	AllocExclusive();
	184
	185	GdkRectangle rect;
	186	rect.x = x;
	187	rect.y = y;
	188	rect.width = width;
	189	rect.height = height;
	190
	191	GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	192	gdk_region_destroy( M_REGIONDATA->m_region );
	193	M_REGIONDATA->m_region = reg;
	194	}
	195
	196	return TRUE;
	197	}
	198
	199	bool wxRegion::Union( const wxRect& rect )
	200	{
	201	return Union( rect.x, rect.y, rect.width, rect.height );
	202	}
	203
	204	bool wxRegion::Union( const wxRegion& region )
	205	{
	206	if (region.IsNull())
	207	return FALSE;
	208
	209	if (!m_refData)
	210	{
	211	m_refData = new wxRegionRefData();
	212	M_REGIONDATA->m_region = gdk_region_new();
	213	}
	214	else
	215	{
	216	AllocExclusive();
	217	}
	218
	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
	223	return TRUE;
	224	}
	225
	226	bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	227	{
	228	wxRegion reg( x, y, width, height );
	229
	230	return Intersect( reg );
	231	}
	232
	233	bool wxRegion::Intersect( const wxRect& rect )
	234	{
	235	wxRegion reg( rect );
	236
	237	return Intersect( reg );
	238	}
	239
	240	bool wxRegion::Intersect( const wxRegion& region )
	241	{
	242	if (region.IsNull())
	243	return FALSE;
	244
	245	if (!m_refData)
	246	{
	247	// intersecting with invalid region doesn't make sense
	248	return FALSE;
	249	}
	250
	251	AllocExclusive();
	252
	253	GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	254	gdk_region_destroy( M_REGIONDATA->m_region );
	255	M_REGIONDATA->m_region = reg;
	256
	257	return TRUE;
	258	}
	259
	260	bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	261	{
	262	wxRegion reg( x, y, width, height );
	263	return Subtract( reg );
	264	}
	265
	266	bool wxRegion::Subtract( const wxRect& rect )
	267	{
	268	wxRegion reg( rect );
	269	return Subtract( reg );
	270	}
	271
	272	bool wxRegion::Subtract( const wxRegion& region )
	273	{
	274	if (region.IsNull())
	275	return FALSE;
	276
	277	if (!m_refData)
	278	{
	279	// subtracting from an invalid region doesn't make sense
	280	return FALSE;
	281	}
	282
	283	AllocExclusive();
	284
	285	GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	286	gdk_region_destroy( M_REGIONDATA->m_region );
	287	M_REGIONDATA->m_region = reg;
	288
	289	return TRUE;
	290	}
	291
	292	bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	293	{
	294	wxRegion reg( x, y, width, height );
	295	return Xor( reg );
	296	}
	297
	298	bool wxRegion::Xor( const wxRect& rect )
	299	{
	300	wxRegion reg( rect );
	301	return Xor( reg );
	302	}
	303
	304	bool wxRegion::Xor( const wxRegion& region )
	305	{
	306	if (region.IsNull())
	307	return FALSE;
	308
	309	if (!m_refData)
	310	{
	311	return FALSE;
	312	}
	313
	314	AllocExclusive();
	315
	316	GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
	317	gdk_region_destroy( M_REGIONDATA->m_region );
	318	M_REGIONDATA->m_region = reg;
	319
	320	return TRUE;
	321	}
	322
	323	bool wxRegion::Offset( wxCoord x, wxCoord y )
	324	{
	325	if (!m_refData)
	326	return FALSE;
	327
	328	AllocExclusive();
	329
	330	gdk_region_offset( M_REGIONDATA->m_region, x, y );
	331
	332	return TRUE;
	333	}
	334
	335	// ----------------------------------------------------------------------------
	336	// wxRegion tests
	337	// ----------------------------------------------------------------------------
	338
	339	void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
	340	{
	341	if ( m_refData )
	342	{
	343	GdkRectangle rect;
	344	gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
	345	x = rect.x;
	346	y = rect.y;
	347	w = rect.width;
	348	h = rect.height;
	349	}
	350	else
	351	{
	352	x = 0;
	353	y = 0;
	354	w = -1;
	355	h = -1;
	356	}
	357	}
	358
	359	wxRect wxRegion::GetBox() const
	360	{
	361	wxCoord x, y, w, h;
	362	GetBox( x, y, w, h );
	363	return wxRect( x, y, w, h );
	364	}
	365
	366	bool wxRegion::Empty() const
	367	{
	368	if (!m_refData)
	369	return TRUE;
	370
	371	return gdk_region_empty( M_REGIONDATA->m_region );
	372	}
	373
	374	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
	375	{
	376	if (!m_refData)
	377	return wxOutRegion;
	378
	379	if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
	380	return wxInRegion;
	381	else
	382	return wxOutRegion;
	383	}
	384
	385	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
	386	{
	387	if (!m_refData)
	388	return wxOutRegion;
	389
	390	GdkRectangle rect;
	391	rect.x = x;
	392	rect.y = y;
	393	rect.width = w;
	394	rect.height = h;
	395	GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
	396	switch (res)
	397	{
	398	case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion;
	399	case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion;
	400	case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
	401	}
	402	return wxOutRegion;
	403	}
	404
	405	wxRegionContain wxRegion::Contains(const wxPoint& pt) const
	406	{
	407	return Contains( pt.x, pt.y );
	408	}
	409
	410	wxRegionContain wxRegion::Contains(const wxRect& rect) const
	411	{
	412	return Contains( rect.x, rect.y, rect.width, rect.height );
	413	}
	414
	415	GdkRegion *wxRegion::GetRegion() const
	416	{
	417	if (!m_refData)
	418	return (GdkRegion*) NULL;
	419
	420	return M_REGIONDATA->m_region;
	421	}
	422
	423	// ----------------------------------------------------------------------------
	424	// wxRegionIterator
	425	// ----------------------------------------------------------------------------
	426
	427	// the following structures must match the private structures
	428	// in X11 region code ( xc/lib/X11/region.h )
	429
	430	// this makes the Region type transparent
	431	// and we have access to the region rectangles
	432
	433	#include <gdk/gdkprivate.h>
	434
	435	struct _XBox {
	436	short x1, x2, y1, y2;
	437	};
	438
	439	struct _XRegion {
	440	long size , numRects;
	441	_XBox *rects, extents;
	442	};
	443
	444
	445	class wxRIRefData: public wxObjectRefData
	446	{
	447	public:
	448	wxRIRefData() { Init(); }
	449	virtual ~wxRIRefData();
	450
	451	void CreateRects( const wxRegion& r );
	452
	453	void Init() { m_rects = NULL; m_numRects = 0; }
	454
	455	wxRect *m_rects;
	456	size_t m_numRects;
	457	};
	458
	459	wxRIRefData::~wxRIRefData()
	460	{
	461	delete [] m_rects;
	462	}
	463
	464	void wxRIRefData::CreateRects( const wxRegion& region )
	465	{
	466	delete [] m_rects;
	467
	468	Init();
	469
	470	GdkRegion *gdkregion = region.GetRegion();
	471	if (!gdkregion)
	472	return;
	473
	474	Region r = ((GdkRegionPrivate *)gdkregion)->xregion;
	475	if (r)
	476	{
	477	m_numRects = r->numRects;
	478	if (m_numRects)
	479	{
	480	m_rects = new wxRect[m_numRects];
	481	for (size_t i=0; i < m_numRects; ++i)
	482	{
	483	_XBox &xr = r->rects[i];
	484	wxRect &wr = m_rects[i];
	485	wr.x = xr.x1;
	486	wr.y = xr.y1;
	487	wr.width = xr.x2-xr.x1;
	488	wr.height = xr.y2-xr.y1;
	489	}
	490	}
	491	}
	492	}
	493
	494	wxRegionIterator::wxRegionIterator()
	495	{
	496	m_refData = new wxRIRefData();
	497	Reset();
	498	}
	499
	500	wxRegionIterator::wxRegionIterator( const wxRegion& region )
	501	{
	502	m_refData = new wxRIRefData();
	503	Reset(region);
	504	}
	505
	506	void wxRegionIterator::Reset( const wxRegion& region )
	507	{
	508	m_region = region;
	509	((wxRIRefData*)m_refData)->CreateRects(region);
	510	Reset();
	511	}
	512
	513	bool wxRegionIterator::HaveRects() const
	514	{
	515	return m_current < ((wxRIRefData*)m_refData)->m_numRects;
	516	}
	517
	518	wxRegionIterator& wxRegionIterator::operator ++ ()
	519	{
	520	if (HaveRects())
	521	++m_current;
	522
	523	return *this;
	524	}
	525
	526	wxRegionIterator wxRegionIterator::operator ++ (int)
	527	{
	528	wxRegionIterator tmp = *this;
	529	if (HaveRects())
	530	++m_current;
	531
	532	return tmp;
	533	}
	534
	535	wxCoord wxRegionIterator::GetX() const
	536	{
	537	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	538
	539	return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
	540	}
	541
	542	wxCoord wxRegionIterator::GetY() const
	543	{
	544	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	545
	546	return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
	547	}
	548
	549	wxCoord wxRegionIterator::GetW() const
	550	{
	551	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	552
	553	return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
	554	}
	555
	556	wxCoord wxRegionIterator::GetH() const
	557	{
	558	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	559
	560	return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
	561	}
	562
	563	wxRect wxRegionIterator::GetRect() const
	564	{
	565	wxRect r;
	566	if( HaveRects() )
	567	r = ((wxRIRefData*)m_refData)->m_rects[m_current];
	568
	569	return r;
	570	}
	571