src/gtk1/region.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/gtk1/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"

#ifndef WX_PRECOMP
    #include "wx/log.h"
#endif

#include "wx/gtk1/private.h"


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

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

    operator GdkRegion *() const { return m_region; }

private:
    GdkRegion *m_region;
};


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

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

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

    ~wxRegionRefData()
    {
        if (m_region)
            gdk_region_destroy( m_region );
    }

    GdkRegion  *m_region;
};

// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------

#define M_REGIONDATA ((wxRegionRefData *)m_refData)
#define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))

IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)

// ----------------------------------------------------------------------------
// wxRegion construction
// ----------------------------------------------------------------------------

#define M_REGIONDATA ((wxRegionRefData *)m_refData)

void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
{
    GdkRectangle rect;
    rect.x = x;
    rect.y = y;
    rect.width = w;
    rect.height = h;

    m_refData = new wxRegionRefData();

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

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

wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
{
    GdkPoint *gdkpoints = new GdkPoint[n];
    for ( size_t i = 0 ; i < n ; i++ )
    {
        gdkpoints[i].x = points[i].x;
        gdkpoints[i].y = points[i].y;
    }

    m_refData = new wxRegionRefData();

    GdkRegion* reg = gdk_region_polygon
                     (
                        gdkpoints,
                        n,
                        fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
                                                    : GDK_EVEN_ODD_RULE
                     );

    M_REGIONDATA->m_region = reg;

    delete [] gdkpoints;
}

wxRegion::~wxRegion()
{
    // m_refData unrefed in ~wxObject
}

wxObjectRefData *wxRegion::CreateRefData() const
{
    return new wxRegionRefData;
}

wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const
{
    return new wxRegionRefData(*(wxRegionRefData *)data);
}

// ----------------------------------------------------------------------------
// wxRegion comparison
// ----------------------------------------------------------------------------

bool wxRegion::operator==( const wxRegion& region ) const
{
    if (m_refData == region.m_refData) return TRUE;

    if (!m_refData || !region.m_refData) return FALSE;

    // compare the regions themselves, not the pointers to ref data!
    return gdk_region_equal(M_REGIONDATA->m_region,
                            M_REGIONDATA_OF(region)->m_region);
}

// ----------------------------------------------------------------------------
// wxRegion operations
// ----------------------------------------------------------------------------

void wxRegion::Clear()
{
    UnRef();
}

bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    // workaround for a strange GTK/X11 bug: taking union with an empty
    // rectangle results in an empty region which is definitely not what we
    // want
    if ( !width || !height )
        return TRUE;

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

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

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

    return TRUE;
}

bool wxRegion::Union( const wxRect& rect )
{
    return Union( rect.x, rect.y, rect.width, rect.height );
}

bool wxRegion::Union( const wxRegion& region )
{
    if (region.IsNull())
        return FALSE;

    if (!m_refData)
    {
        m_refData = new wxRegionRefData();
        M_REGIONDATA->m_region = gdk_region_new();
    }
    else
    {
        AllocExclusive();
    }

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

    return TRUE;
}

bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxRegion reg( x, y, width, height );

    return Intersect( reg );
}

bool wxRegion::Intersect( const wxRect& rect )
{
    wxRegion reg( rect );

    return Intersect( reg );
}

bool wxRegion::Intersect( const wxRegion& region )
{
    if (region.IsNull())
        return FALSE;

    if (!m_refData)
    {
        // intersecting with invalid region doesn't make sense
        return FALSE;
    }

    AllocExclusive();

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

    return TRUE;
}

bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxRegion reg( x, y, width, height );
    return Subtract( reg );
}

bool wxRegion::Subtract( const wxRect& rect )
{
    wxRegion reg( rect );
    return Subtract( reg );
}

bool wxRegion::Subtract( const wxRegion& region )
{
    if (region.IsNull())
        return FALSE;

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

    AllocExclusive();

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

    return TRUE;
}

bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxRegion reg( x, y, width, height );
    return Xor( reg );
}

bool wxRegion::Xor( const wxRect& rect )
{
    wxRegion reg( rect );
    return Xor( reg );
}

bool wxRegion::Xor( const wxRegion& region )
{
    if (region.IsNull())
        return FALSE;

    if (!m_refData)
    {
        return FALSE;
    }

    AllocExclusive();

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

    return TRUE;
}

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

    AllocExclusive();

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

    return TRUE;
}

// ----------------------------------------------------------------------------
// wxRegion tests
// ----------------------------------------------------------------------------

void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
{
    if ( m_refData )
    {
        GdkRectangle rect;
        gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
        x = rect.x;
        y = rect.y;
        w = rect.width;
        h = rect.height;
    }
    else
    {
        x = 0;
        y = 0;
        w = -1;
        h = -1;
    }
}

wxRect wxRegion::GetBox() const
{
    wxCoord x, y, w, h;
    GetBox( x, y, w, h );
    return wxRect( x, y, w, h );
}

bool wxRegion::Empty() const
{
    if (!m_refData)
        return TRUE;

    return gdk_region_empty( M_REGIONDATA->m_region );
}

wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
{
    if (!m_refData)
        return wxOutRegion;

    if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
        return wxInRegion;
    else
        return wxOutRegion;
}

wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
{
    if (!m_refData)
        return wxOutRegion;

    GdkRectangle rect;
    rect.x = x;
    rect.y = y;
    rect.width = w;
    rect.height = h;
    GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
    switch (res)
    {
        case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
        case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
        case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
    }
    return wxOutRegion;
}

wxRegionContain wxRegion::Contains(const wxPoint& pt) const
{
    return Contains( pt.x, pt.y );
}

wxRegionContain wxRegion::Contains(const wxRect& rect) const
{
    return Contains( rect.x, rect.y, rect.width, rect.height );
}

GdkRegion *wxRegion::GetRegion() const
{
    if (!m_refData)
        return (GdkRegion*) NULL;

    return M_REGIONDATA->m_region;
}

// ----------------------------------------------------------------------------
// wxRegionIterator
// ----------------------------------------------------------------------------

// the following structures must match the private structures
// in X11 region code ( xc/lib/X11/region.h )

// this makes the Region type transparent
// and we have access to the region rectangles

#include <gdk/gdkprivate.h>

struct _XBox {
    short x1, x2, y1, y2;
};

struct _XRegion {
    long   size , numRects;
    _XBox *rects, extents;
};


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

    void CreateRects( const wxRegion& r );

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

    wxRect *m_rects;
    size_t  m_numRects;
};

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

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

    Init();

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

    Region r = ((GdkRegionPrivate *)gdkregion)->xregion;
    if (r)
    {
        m_numRects = r->numRects;
        if (m_numRects)
        {
            m_rects = new wxRect[m_numRects];
            for (size_t i=0; i < m_numRects; ++i)
            {
                _XBox &xr = r->rects[i];
                wxRect &wr = m_rects[i];
                wr.x = xr.x1;
                wr.y = xr.y1;
                wr.width = xr.x2-xr.x1;
                wr.height = xr.y2-xr.y1;
            }
        }
    }
}

wxRegionIterator::wxRegionIterator()
{
    m_refData = new wxRIRefData();
    Reset();
}

wxRegionIterator::wxRegionIterator( const wxRegion& region )
{
    m_refData = new wxRIRefData();
    Reset(region);
}

void wxRegionIterator::Reset( const wxRegion& region )
{
    m_region = region;
    ((wxRIRefData*)m_refData)->CreateRects(region);
    Reset();
}

bool wxRegionIterator::HaveRects() const
{
    return m_current < ((wxRIRefData*)m_refData)->m_numRects;
}

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

    return *this;
}

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

    return tmp;
}

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

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

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

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

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

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

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

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

wxRect wxRegionIterator::GetRect() const
{
    wxRect r;
    if( HaveRects() )
        r = ((wxRIRefData*)m_refData)->m_rects[m_current];

    return r;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/gtk1/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
	24	#ifndef WX_PRECOMP
	25	#include "wx/log.h"
	26	#endif
	27
	28	#include "wx/gtk1/private.h"
	29
	30
	31	// ----------------------------------------------------------------------------
	32	// wxGdkRegion: creates a new region in ctor and destroys in dtor
	33	// ----------------------------------------------------------------------------
	34
	35	class wxGdkRegion
	36	{
	37	public:
	38	wxGdkRegion() { m_region = gdk_region_new(); }
	39	~wxGdkRegion() { gdk_region_destroy(m_region); }
	40
	41	operator GdkRegion *() const { return m_region; }
	42
	43	private:
	44	GdkRegion *m_region;
	45	};
	46
	47
	48	// ----------------------------------------------------------------------------
	49	// wxRegionRefData: private class containing the information about the region
	50	// ----------------------------------------------------------------------------
	51
	52	class wxRegionRefData : public wxObjectRefData
	53	{
	54	public:
	55	wxRegionRefData()
	56	{
	57	m_region = NULL;
	58	}
	59
	60	wxRegionRefData(const wxRegionRefData& refData)
	61	: wxObjectRefData()
	62	{
	63	m_region = gdk_regions_union(wxGdkRegion(), refData.m_region);
	64	}
	65
	66	~wxRegionRefData()
	67	{
	68	if (m_region)
	69	gdk_region_destroy( m_region );
	70	}
	71
	72	GdkRegion *m_region;
	73	};
	74
	75	// ----------------------------------------------------------------------------
	76	// macros
	77	// ----------------------------------------------------------------------------
	78
	79	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	80	#define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))
	81
	82	IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
	83	IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)
	84
	85	// ----------------------------------------------------------------------------
	86	// wxRegion construction
	87	// ----------------------------------------------------------------------------
	88
	89	#define M_REGIONDATA ((wxRegionRefData *)m_refData)
	90
	91	void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
	92	{
	93	GdkRectangle rect;
	94	rect.x = x;
	95	rect.y = y;
	96	rect.width = w;
	97	rect.height = h;
	98
	99	m_refData = new wxRegionRefData();
	100
	101	M_REGIONDATA->m_region = gdk_region_union_with_rect( wxGdkRegion(), &rect );
	102	}
	103
	104	wxRegion::wxRegion( GdkRegion *region )
	105	{
	106	m_refData = new wxRegionRefData();
	107	M_REGIONDATA->m_region = gdk_regions_union(wxGdkRegion(), region);
	108	}
	109
	110	wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
	111	{
	112	GdkPoint *gdkpoints = new GdkPoint[n];
	113	for ( size_t i = 0 ; i < n ; i++ )
	114	{
	115	gdkpoints[i].x = points[i].x;
	116	gdkpoints[i].y = points[i].y;
	117	}
	118
	119	m_refData = new wxRegionRefData();
	120
	121	GdkRegion* reg = gdk_region_polygon
	122	(
	123	gdkpoints,
	124	n,
	125	fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
	126	: GDK_EVEN_ODD_RULE
	127	);
	128
	129	M_REGIONDATA->m_region = reg;
	130
	131	delete [] gdkpoints;
	132	}
	133
	134	wxRegion::~wxRegion()
	135	{
	136	// m_refData unrefed in ~wxObject
	137	}
	138
	139	wxObjectRefData *wxRegion::CreateRefData() const
	140	{
	141	return new wxRegionRefData;
	142	}
	143
	144	wxObjectRefData wxRegion::CloneRefData(const wxObjectRefData data) const
	145	{
	146	return new wxRegionRefData((wxRegionRefData )data);
	147	}
	148
	149	// ----------------------------------------------------------------------------
	150	// wxRegion comparison
	151	// ----------------------------------------------------------------------------
	152
	153	bool wxRegion::operator==( const wxRegion& region ) const
	154	{
	155	if (m_refData == region.m_refData) return TRUE;
	156
	157	if (!m_refData \|\| !region.m_refData) return FALSE;
	158
	159	// compare the regions themselves, not the pointers to ref data!
	160	return gdk_region_equal(M_REGIONDATA->m_region,
	161	M_REGIONDATA_OF(region)->m_region);
	162	}
	163
	164	// ----------------------------------------------------------------------------
	165	// wxRegion operations
	166	// ----------------------------------------------------------------------------
	167
	168	void wxRegion::Clear()
	169	{
	170	UnRef();
	171	}
	172
	173	bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	174	{
	175	// workaround for a strange GTK/X11 bug: taking union with an empty
	176	// rectangle results in an empty region which is definitely not what we
	177	// want
	178	if ( !width \|\| !height )
	179	return TRUE;
	180
	181	if ( !m_refData )
	182	{
	183	InitRect(x, y, width, height);
	184	}
	185	else
	186	{
	187	AllocExclusive();
	188
	189	GdkRectangle rect;
	190	rect.x = x;
	191	rect.y = y;
	192	rect.width = width;
	193	rect.height = height;
	194
	195	GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	196	gdk_region_destroy( M_REGIONDATA->m_region );
	197	M_REGIONDATA->m_region = reg;
	198	}
	199
	200	return TRUE;
	201	}
	202
	203	bool wxRegion::Union( const wxRect& rect )
	204	{
	205	return Union( rect.x, rect.y, rect.width, rect.height );
	206	}
	207
	208	bool wxRegion::Union( const wxRegion& region )
	209	{
	210	if (region.IsNull())
	211	return FALSE;
	212
	213	if (!m_refData)
	214	{
	215	m_refData = new wxRegionRefData();
	216	M_REGIONDATA->m_region = gdk_region_new();
	217	}
	218	else
	219	{
	220	AllocExclusive();
	221	}
	222
	223	GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
	224	gdk_region_destroy( M_REGIONDATA->m_region );
	225	M_REGIONDATA->m_region = reg;
	226
	227	return TRUE;
	228	}
	229
	230	bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	231	{
	232	wxRegion reg( x, y, width, height );
	233
	234	return Intersect( reg );
	235	}
	236
	237	bool wxRegion::Intersect( const wxRect& rect )
	238	{
	239	wxRegion reg( rect );
	240
	241	return Intersect( reg );
	242	}
	243
	244	bool wxRegion::Intersect( const wxRegion& region )
	245	{
	246	if (region.IsNull())
	247	return FALSE;
	248
	249	if (!m_refData)
	250	{
	251	// intersecting with invalid region doesn't make sense
	252	return FALSE;
	253	}
	254
	255	AllocExclusive();
	256
	257	GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	258	gdk_region_destroy( M_REGIONDATA->m_region );
	259	M_REGIONDATA->m_region = reg;
	260
	261	return TRUE;
	262	}
	263
	264	bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	265	{
	266	wxRegion reg( x, y, width, height );
	267	return Subtract( reg );
	268	}
	269
	270	bool wxRegion::Subtract( const wxRect& rect )
	271	{
	272	wxRegion reg( rect );
	273	return Subtract( reg );
	274	}
	275
	276	bool wxRegion::Subtract( const wxRegion& region )
	277	{
	278	if (region.IsNull())
	279	return FALSE;
	280
	281	if (!m_refData)
	282	{
	283	// subtracting from an invalid region doesn't make sense
	284	return FALSE;
	285	}
	286
	287	AllocExclusive();
	288
	289	GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	290	gdk_region_destroy( M_REGIONDATA->m_region );
	291	M_REGIONDATA->m_region = reg;
	292
	293	return TRUE;
	294	}
	295
	296	bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
	297	{
	298	wxRegion reg( x, y, width, height );
	299	return Xor( reg );
	300	}
	301
	302	bool wxRegion::Xor( const wxRect& rect )
	303	{
	304	wxRegion reg( rect );
	305	return Xor( reg );
	306	}
	307
	308	bool wxRegion::Xor( const wxRegion& region )
	309	{
	310	if (region.IsNull())
	311	return FALSE;
	312
	313	if (!m_refData)
	314	{
	315	return FALSE;
	316	}
	317
	318	AllocExclusive();
	319
	320	GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
	321	gdk_region_destroy( M_REGIONDATA->m_region );
	322	M_REGIONDATA->m_region = reg;
	323
	324	return TRUE;
	325	}
	326
	327	bool wxRegion::Offset( wxCoord x, wxCoord y )
	328	{
	329	if (!m_refData)
	330	return FALSE;
	331
	332	AllocExclusive();
	333
	334	gdk_region_offset( M_REGIONDATA->m_region, x, y );
	335
	336	return TRUE;
	337	}
	338
	339	// ----------------------------------------------------------------------------
	340	// wxRegion tests
	341	// ----------------------------------------------------------------------------
	342
	343	void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
	344	{
	345	if ( m_refData )
	346	{
	347	GdkRectangle rect;
	348	gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
	349	x = rect.x;
	350	y = rect.y;
	351	w = rect.width;
	352	h = rect.height;
	353	}
	354	else
	355	{
	356	x = 0;
	357	y = 0;
	358	w = -1;
	359	h = -1;
	360	}
	361	}
	362
	363	wxRect wxRegion::GetBox() const
	364	{
	365	wxCoord x, y, w, h;
	366	GetBox( x, y, w, h );
	367	return wxRect( x, y, w, h );
	368	}
	369
	370	bool wxRegion::Empty() const
	371	{
	372	if (!m_refData)
	373	return TRUE;
	374
	375	return gdk_region_empty( M_REGIONDATA->m_region );
	376	}
	377
	378	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
	379	{
	380	if (!m_refData)
	381	return wxOutRegion;
	382
	383	if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
	384	return wxInRegion;
	385	else
	386	return wxOutRegion;
	387	}
	388
	389	wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
	390	{
	391	if (!m_refData)
	392	return wxOutRegion;
	393
	394	GdkRectangle rect;
	395	rect.x = x;
	396	rect.y = y;
	397	rect.width = w;
	398	rect.height = h;
	399	GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
	400	switch (res)
	401	{
	402	case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion;
	403	case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion;
	404	case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
	405	}
	406	return wxOutRegion;
	407	}
	408
	409	wxRegionContain wxRegion::Contains(const wxPoint& pt) const
	410	{
	411	return Contains( pt.x, pt.y );
	412	}
	413
	414	wxRegionContain wxRegion::Contains(const wxRect& rect) const
	415	{
	416	return Contains( rect.x, rect.y, rect.width, rect.height );
	417	}
	418
	419	GdkRegion *wxRegion::GetRegion() const
	420	{
	421	if (!m_refData)
	422	return (GdkRegion*) NULL;
	423
	424	return M_REGIONDATA->m_region;
	425	}
	426
	427	// ----------------------------------------------------------------------------
	428	// wxRegionIterator
	429	// ----------------------------------------------------------------------------
	430
	431	// the following structures must match the private structures
	432	// in X11 region code ( xc/lib/X11/region.h )
	433
	434	// this makes the Region type transparent
	435	// and we have access to the region rectangles
	436
	437	#include <gdk/gdkprivate.h>
	438
	439	struct _XBox {
	440	short x1, x2, y1, y2;
	441	};
	442
	443	struct _XRegion {
	444	long size , numRects;
	445	_XBox *rects, extents;
	446	};
	447
	448
	449	class wxRIRefData: public wxObjectRefData
	450	{
	451	public:
	452	wxRIRefData() { Init(); }
	453	virtual ~wxRIRefData();
	454
	455	void CreateRects( const wxRegion& r );
	456
	457	void Init() { m_rects = NULL; m_numRects = 0; }
	458
	459	wxRect *m_rects;
	460	size_t m_numRects;
	461	};
	462
	463	wxRIRefData::~wxRIRefData()
	464	{
	465	delete [] m_rects;
	466	}
	467
	468	void wxRIRefData::CreateRects( const wxRegion& region )
	469	{
	470	delete [] m_rects;
	471
	472	Init();
	473
	474	GdkRegion *gdkregion = region.GetRegion();
	475	if (!gdkregion)
	476	return;
	477
	478	Region r = ((GdkRegionPrivate *)gdkregion)->xregion;
	479	if (r)
	480	{
	481	m_numRects = r->numRects;
	482	if (m_numRects)
	483	{
	484	m_rects = new wxRect[m_numRects];
	485	for (size_t i=0; i < m_numRects; ++i)
	486	{
	487	_XBox &xr = r->rects[i];
	488	wxRect &wr = m_rects[i];
	489	wr.x = xr.x1;
	490	wr.y = xr.y1;
	491	wr.width = xr.x2-xr.x1;
	492	wr.height = xr.y2-xr.y1;
	493	}
	494	}
	495	}
	496	}
	497
	498	wxRegionIterator::wxRegionIterator()
	499	{
	500	m_refData = new wxRIRefData();
	501	Reset();
	502	}
	503
	504	wxRegionIterator::wxRegionIterator( const wxRegion& region )
	505	{
	506	m_refData = new wxRIRefData();
	507	Reset(region);
	508	}
	509
	510	void wxRegionIterator::Reset( const wxRegion& region )
	511	{
	512	m_region = region;
	513	((wxRIRefData*)m_refData)->CreateRects(region);
	514	Reset();
	515	}
	516
	517	bool wxRegionIterator::HaveRects() const
	518	{
	519	return m_current < ((wxRIRefData*)m_refData)->m_numRects;
	520	}
	521
	522	wxRegionIterator& wxRegionIterator::operator ++ ()
	523	{
	524	if (HaveRects())
	525	++m_current;
	526
	527	return *this;
	528	}
	529
	530	wxRegionIterator wxRegionIterator::operator ++ (int)
	531	{
	532	wxRegionIterator tmp = *this;
	533	if (HaveRects())
	534	++m_current;
	535
	536	return tmp;
	537	}
	538
	539	wxCoord wxRegionIterator::GetX() const
	540	{
	541	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	542
	543	return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
	544	}
	545
	546	wxCoord wxRegionIterator::GetY() const
	547	{
	548	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	549
	550	return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
	551	}
	552
	553	wxCoord wxRegionIterator::GetW() const
	554	{
	555	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	556
	557	return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
	558	}
	559
	560	wxCoord wxRegionIterator::GetH() const
	561	{
	562	wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
	563
	564	return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
	565	}
	566
	567	wxRect wxRegionIterator::GetRect() const
	568	{
	569	wxRect r;
	570	if( HaveRects() )
	571	r = ((wxRIRefData*)m_refData)->m_rects[m_current];
	572
	573	return r;
	574	}