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/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 ) 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;

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