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
// ============================================================================

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "region.h"
#endif

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

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

#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	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	16	#pragma implementation "region.h"
	17	#endif
	18
	19	// ----------------------------------------------------------------------------
	20	// headers
	21	// ----------------------------------------------------------------------------
	22
	23	// For compilers that support precompilation, includes "wx.h".
	24	#include "wx/wxprec.h"
	25
	26	#include "wx/log.h"
	27
	28	#include "wx/region.h"
	29
	30	#include "wx/gtk/private.h"
	31
	32	#ifndef __WXGTK20__
	33
	34	// ----------------------------------------------------------------------------
	35	// wxGdkRegion: creates a new region in ctor and destroys in dtor
	36	// ----------------------------------------------------------------------------
	37
	38	class wxGdkRegion
	39	{
	40	public:
	41	wxGdkRegion() { m_region = gdk_region_new(); }
	42	~wxGdkRegion() { gdk_region_destroy(m_region); }
	43
	44	operator GdkRegion *() const { return m_region; }
	45
	46	private:
	47	GdkRegion *m_region;
	48	};
	49
	50	#endif // __WXGTK20__
	51
	52	// ----------------------------------------------------------------------------
	53	// wxRegionRefData: private class containing the information about the region
	54	// ----------------------------------------------------------------------------
	55
	56	class wxRegionRefData : public wxObjectRefData
	57	{
	58	public:
	59	wxRegionRefData()
	60	{
	61	m_region = NULL;
	62	}
	63
	64	wxRegionRefData(const wxRegionRefData& refData)
	65	: wxObjectRefData()
	66	{
	67	#ifdef __WXGTK20__
	68	m_region = gdk_region_copy(refData.m_region);
	69	#else
	70	m_region = gdk_regions_union(wxGdkRegion(), refData.m_region);
	71	#endif
	72	}
	73
	74	~wxRegionRefData()
	75	{
	76	if (m_region)
	77	gdk_region_destroy( m_region );
	78	}
	79
	80	GdkRegion *m_region;
	81	};
	82
	83	// ----------------------------------------------------------------------------
	84	// macros
	85	// ----------------------------------------------------------------------------
	86
	87	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	88	#define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))
	89
	90	IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
	91	IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)
	92
	93	// ----------------------------------------------------------------------------
	94	// wxRegion construction
	95	// ----------------------------------------------------------------------------
	96
	97	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	98
	99	void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
	100	{
	101	GdkRectangle rect;
	102	rect.x = x;
	103	rect.y = y;
	104	rect.width = w;
	105	rect.height = h;
	106
	107	m_refData = new wxRegionRefData();
	108
	109	#ifdef __WXGTK20__
	110	M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
	111	#else
	112	M_REGIONDATA->m_region = gdk_region_union_with_rect( wxGdkRegion(), &rect );
	113	#endif
	114	}
	115
	116	wxRegion::wxRegion( GdkRegion *region )
	117	{
	118	m_refData = new wxRegionRefData();
	119	#ifdef __WXGTK20__
	120	M_REGIONDATA->m_region = gdk_region_copy( region );
	121	#else
	122	M_REGIONDATA->m_region = gdk_regions_union(wxGdkRegion(), region);
	123	#endif
	124	}
	125
	126	wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
	127	{
	128	GdkPoint *gdkpoints = new GdkPoint[n];
	129	for ( size_t i = 0 ; i < n ; i++ )
	130	{
	131	gdkpoints[i].x = points[i].x;
	132	gdkpoints[i].y = points[i].y;
	133	}
	134
	135	m_refData = new wxRegionRefData();
	136
	137	GdkRegion* reg = gdk_region_polygon
	138	(
	139	gdkpoints,
	140	n,
	141	fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
	142	: GDK_EVEN_ODD_RULE
	143	);
	144
	145	M_REGIONDATA->m_region = reg;
	146
	147	delete [] gdkpoints;
	148	}
	149
	150	wxRegion::~wxRegion()
	151	{
	152	// m_refData unrefed in ~wxObject
	153	}
	154
	155	wxObjectRefData *wxRegion::CreateRefData() const
	156	{
	157	return new wxRegionRefData;
	158	}
	159
	160	wxObjectRefData wxRegion::CloneRefData(const wxObjectRefData data) const
	161	{
	162	return new wxRegionRefData((wxRegionRefData )data);
	163	}
	164
	165	// ----------------------------------------------------------------------------
	166	// wxRegion comparison
	167	// ----------------------------------------------------------------------------
	168
	169	bool wxRegion::operator==( const wxRegion& region )
	170	{
	171	if (m_refData == region.m_refData) return TRUE;
	172
	173	if (!m_refData \|\| !region.m_refData) return FALSE;
	174
	175	// compare the regions themselves, not the pointers to ref data!
	176	return gdk_region_equal(M_REGIONDATA->m_region,
	177	M_REGIONDATA_OF(region)->m_region);
	178	}
	179
	180	// ----------------------------------------------------------------------------
	181	// wxRegion operations
	182	// ----------------------------------------------------------------------------
	183
	184	void wxRegion::Clear()
	185	{
	186	UnRef();
	187	}
	188
	189	bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	190	{
	191	// workaround for a strange GTK/X11 bug: taking union with an empty
	192	// rectangle results in an empty region which is definitely not what we
	193	// want
	194	if ( !width \|\| !height )
	195	return TRUE;
	196
	197	if ( !m_refData )
	198	{
	199	InitRect(x, y, width, height);
	200	}
	201	else
	202	{
	203	AllocExclusive();
	204
	205	GdkRectangle rect;
	206	rect.x = x;
	207	rect.y = y;
	208	rect.width = width;
	209	rect.height = height;
	210
	211	#ifdef __WXGTK20__
	212	gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	213	#else
	214	GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	215	gdk_region_destroy( M_REGIONDATA->m_region );
	216	M_REGIONDATA->m_region = reg;
	217	#endif
	218	}
	219
	220	return TRUE;
	221	}
	222
	223	bool wxRegion::Union( const wxRect& rect )
	224	{
	225	return Union( rect.x, rect.y, rect.width, rect.height );
	226	}
	227
	228	bool wxRegion::Union( const wxRegion& region )
	229	{
	230	if (region.IsNull())
	231	return FALSE;
	232
	233	if (!m_refData)
	234	{
	235	m_refData = new wxRegionRefData();
	236	M_REGIONDATA->m_region = gdk_region_new();
	237	}
	238	else
	239	{
	240	AllocExclusive();
	241	}
	242
	243	#ifdef __WXGTK20__
	244	gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
	245	#else
	246	GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
	247	gdk_region_destroy( M_REGIONDATA->m_region );
	248	M_REGIONDATA->m_region = reg;
	249	#endif
	250
	251	return TRUE;
	252	}
	253
	254	bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	255	{
	256	wxRegion reg( x, y, width, height );
	257
	258	return Intersect( reg );
	259	}
	260
	261	bool wxRegion::Intersect( const wxRect& rect )
	262	{
	263	wxRegion reg( rect );
	264
	265	return Intersect( reg );
	266	}
	267
	268	bool wxRegion::Intersect( const wxRegion& region )
	269	{
	270	if (region.IsNull())
	271	return FALSE;
	272
	273	if (!m_refData)
	274	{
	275	// intersecting with invalid region doesn't make sense
	276	return FALSE;
	277	}
	278
	279	AllocExclusive();
	280
	281	#ifdef __WXGTK20__
	282	gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	283	#else
	284	GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	285	gdk_region_destroy( M_REGIONDATA->m_region );
	286	M_REGIONDATA->m_region = reg;
	287	#endif
	288
	289	return TRUE;
	290	}
	291
	292	bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	293	{
	294	wxRegion reg( x, y, width, height );
	295	return Subtract( reg );
	296	}
	297
	298	bool wxRegion::Subtract( const wxRect& rect )
	299	{
	300	wxRegion reg( rect );
	301	return Subtract( reg );
	302	}
	303
	304	bool wxRegion::Subtract( const wxRegion& region )
	305	{
	306	if (region.IsNull())
	307	return FALSE;
	308
	309	if (!m_refData)
	310	{
	311	// subtracting from an invalid region doesn't make sense
	312	return FALSE;
	313	}
	314
	315	AllocExclusive();
	316
	317	#ifdef __WXGTK20__
	318	gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	319	#else
	320	GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	321	gdk_region_destroy( M_REGIONDATA->m_region );
	322	M_REGIONDATA->m_region = reg;
	323	#endif
	324
	325	return TRUE;
	326	}
	327
	328	bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	329	{
	330	wxRegion reg( x, y, width, height );
	331	return Xor( reg );
	332	}
	333
	334	bool wxRegion::Xor( const wxRect& rect )
	335	{
	336	wxRegion reg( rect );
	337	return Xor( reg );
	338	}
	339
	340	bool wxRegion::Xor( const wxRegion& region )
	341	{
	342	if (region.IsNull())
	343	return FALSE;
	344
	345	if (!m_refData)
	346	{
	347	return FALSE;
	348	}
	349
	350	AllocExclusive();
	351
	352	#ifdef __WXGTK20__
	353	gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
	354	#else
	355	GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
	356	gdk_region_destroy( M_REGIONDATA->m_region );
	357	M_REGIONDATA->m_region = reg;
	358	#endif
	359
	360	return TRUE;
	361	}
	362
	363	bool wxRegion::Offset( wxCoord x, wxCoord y )
	364	{
	365	if (!m_refData)
	366	return FALSE;
	367
	368	AllocExclusive();
	369
	370	gdk_region_offset( M_REGIONDATA->m_region, x, y );
	371
	372	return TRUE;
	373	}
	374
	375	// ----------------------------------------------------------------------------
	376	// wxRegion tests
	377	// ----------------------------------------------------------------------------
	378
	379	void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
	380	{
	381	if ( m_refData )
	382	{
	383	GdkRectangle rect;
	384	gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
	385	x = rect.x;
	386	y = rect.y;
	387	w = rect.width;
	388	h = rect.height;
	389	}
	390	else
	391	{
	392	x = 0;
	393	y = 0;
	394	w = -1;
	395	h = -1;
	396	}
	397	}
	398
	399	wxRect wxRegion::GetBox() const
	400	{
	401	wxCoord x, y, w, h;
	402	GetBox( x, y, w, h );
	403	return wxRect( x, y, w, h );
	404	}
	405
	406	bool wxRegion::Empty() const
	407	{
	408	if (!m_refData)
	409	return TRUE;
	410
	411	return gdk_region_empty( M_REGIONDATA->m_region );
	412	}
	413
	414	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
	415	{
	416	if (!m_refData)
	417	return wxOutRegion;
	418
	419	if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
	420	return wxInRegion;
	421	else
	422	return wxOutRegion;
	423	}
	424
	425	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
	426	{
	427	if (!m_refData)
	428	return wxOutRegion;
	429
	430	GdkRectangle rect;
	431	rect.x = x;
	432	rect.y = y;
	433	rect.width = w;
	434	rect.height = h;
	435	GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
	436	switch (res)
	437	{
	438	case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion;
	439	case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion;
	440	case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
	441	}
	442	return wxOutRegion;
	443	}
	444
	445	wxRegionContain wxRegion::Contains(const wxPoint& pt) const
	446	{
	447	return Contains( pt.x, pt.y );
	448	}
	449
	450	wxRegionContain wxRegion::Contains(const wxRect& rect) const
	451	{
	452	return Contains( rect.x, rect.y, rect.width, rect.height );
	453	}
	454
	455	GdkRegion *wxRegion::GetRegion() const
	456	{
	457	if (!m_refData)
	458	return (GdkRegion*) NULL;
	459
	460	return M_REGIONDATA->m_region;
	461	}
	462
	463	// ----------------------------------------------------------------------------
	464	// wxRegionIterator
	465	// ----------------------------------------------------------------------------
	466
	467	#ifndef __WXGTK20__
	468
	469	// the following structures must match the private structures
	470	// in X11 region code ( xc/lib/X11/region.h )
	471
	472	// this makes the Region type transparent
	473	// and we have access to the region rectangles
	474
	475	#include <gdk/gdkprivate.h>
	476
	477	struct _XBox {
	478	short x1, x2, y1, y2;
	479	};
	480
	481	struct _XRegion {
	482	long size , numRects;
	483	_XBox *rects, extents;
	484	};
	485
	486	#endif // GTK+ 1.x
	487
	488	class wxRIRefData: public wxObjectRefData
	489	{
	490	public:
	491	wxRIRefData() { Init(); }
	492	virtual ~wxRIRefData();
	493
	494	void CreateRects( const wxRegion& r );
	495
	496	void Init() { m_rects = NULL; m_numRects = 0; }
	497
	498	wxRect *m_rects;
	499	size_t m_numRects;
	500	};
	501
	502	wxRIRefData::~wxRIRefData()
	503	{
	504	delete [] m_rects;
	505	}
	506
	507	void wxRIRefData::CreateRects( const wxRegion& region )
	508	{
	509	delete [] m_rects;
	510
	511	Init();
	512
	513	GdkRegion *gdkregion = region.GetRegion();
	514	if (!gdkregion)
	515	return;
	516
	517	#ifdef __WXGTK20__
	518	GdkRectangle *gdkrects = NULL;
	519	gint numRects = 0;
	520	gdk_region_get_rectangles( gdkregion, &gdkrects, &numRects );
	521
	522	m_numRects = numRects;
	523	if (numRects)
	524	{
	525	m_rects = new wxRect[m_numRects];
	526	for (size_t i=0; i < m_numRects; ++i)
	527	{
	528	GdkRectangle &gr = gdkrects[i];
	529	wxRect &wr = m_rects[i];
	530	wr.x = gr.x;
	531	wr.y = gr.y;
	532	wr.width = gr.width;
	533	wr.height = gr.height;
	534	}
	535	}
	536	g_free( gdkrects );
	537	#else // GTK+ 1.x
	538	Region r = ((GdkRegionPrivate *)gdkregion)->xregion;
	539	if (r)
	540	{
	541	m_numRects = r->numRects;
	542	if (m_numRects)
	543	{
	544	m_rects = new wxRect[m_numRects];
	545	for (size_t i=0; i < m_numRects; ++i)
	546	{
	547	_XBox &xr = r->rects[i];
	548	wxRect &wr = m_rects[i];
	549	wr.x = xr.x1;
	550	wr.y = xr.y1;
	551	wr.width = xr.x2-xr.x1;
	552	wr.height = xr.y2-xr.y1;
	553	}
	554	}
	555	}
	556	#endif // GTK+ 2.0/1.x
	557	}
	558
	559	wxRegionIterator::wxRegionIterator()
	560	{
	561	m_refData = new wxRIRefData();
	562	Reset();
	563	}
	564
	565	wxRegionIterator::wxRegionIterator( const wxRegion& region )
	566	{
	567	m_refData = new wxRIRefData();
	568	Reset(region);
	569	}
	570
	571	void wxRegionIterator::Reset( const wxRegion& region )
	572	{
	573	m_region = region;
	574	((wxRIRefData*)m_refData)->CreateRects(region);
	575	Reset();
	576	}
	577
	578	bool wxRegionIterator::HaveRects() const
	579	{
	580	return m_current < ((wxRIRefData*)m_refData)->m_numRects;
	581	}
	582
	583	wxRegionIterator& wxRegionIterator::operator ++ ()
	584	{
	585	if (HaveRects())
	586	++m_current;
	587
	588	return *this;
	589	}
	590
	591	wxRegionIterator wxRegionIterator::operator ++ (int)
	592	{
	593	wxRegionIterator tmp = *this;
	594	if (HaveRects())
	595	++m_current;
	596
	597	return tmp;
	598	}
	599
	600	wxCoord wxRegionIterator::GetX() const
	601	{
	602	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	603
	604	return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
	605	}
	606
	607	wxCoord wxRegionIterator::GetY() const
	608	{
	609	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	610
	611	return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
	612	}
	613
	614	wxCoord wxRegionIterator::GetW() const
	615	{
	616	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	617
	618	return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
	619	}
	620
	621	wxCoord wxRegionIterator::GetH() const
	622	{
	623	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	624
	625	return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
	626	}
	627
	628	wxRect wxRegionIterator::GetRect() const
	629	{
	630	wxRect r;
	631	if( HaveRects() )
	632	r = ((wxRIRefData*)m_refData)->m_rects[m_current];
	633
	634	return r;
	635	}
	636