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

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