/////////////////////////////////////////////////////////////////////////////
-// Name: region.cpp
+// Name: src/gtk/region.cpp
// Purpose:
// Author: Robert Roebling
-// Created: 01/02/98
-// Id:
-// Copyright: (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
-// Licence: wxWindows licence
+// Modified: VZ at 05.10.00: use AllocExclusive(), comparison fixed
+// Id: $Id$
+// Copyright: (c) 1998 Robert Roebling
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
-#ifdef __GNUG__
-#pragma implementation "region.h"
-#endif
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
#include "wx/region.h"
-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+#include <gdk/gdk.h>
-class wxRegionRefData: public wxObjectRefData
+// ----------------------------------------------------------------------------
+// wxRegionRefData: private class containing the information about the region
+// ----------------------------------------------------------------------------
+
+class wxRegionRefData : public wxGDIRefData
{
- public:
-
- wxRegionRefData(void);
- ~wxRegionRefData(void);
-
- public:
+public:
+ wxRegionRefData()
+ {
+ m_region = NULL;
+ }
+
+ wxRegionRefData(const wxRegionRefData& refData)
+ : wxGDIRefData()
+ {
+#ifdef __WXGTK3__
+ m_region = cairo_region_copy(refData.m_region);
+#else
+ m_region = gdk_region_copy(refData.m_region);
+#endif
+ }
+
+ virtual ~wxRegionRefData()
+ {
+ if (m_region)
+ {
+#ifdef __WXGTK3__
+ cairo_region_destroy(m_region);
+#else
+ gdk_region_destroy( m_region );
+#endif
+ }
+ }
+#ifdef __WXGTK3__
+ cairo_region_t* m_region;
+#else
GdkRegion *m_region;
+#endif
};
-wxRegionRefData::wxRegionRefData(void)
+// ----------------------------------------------------------------------------
+// macros
+// ----------------------------------------------------------------------------
+
+#define M_REGIONDATA static_cast<wxRegionRefData*>(m_refData)
+#define M_REGIONDATA_OF(r) static_cast<wxRegionRefData*>(r.m_refData)
+
+IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
+IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)
+
+// ----------------------------------------------------------------------------
+// wxRegion construction
+// ----------------------------------------------------------------------------
+
+void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
{
- m_region = NULL;
-};
+ GdkRectangle rect;
+ rect.x = x;
+ rect.y = y;
+ rect.width = w;
+ rect.height = h;
+
+ m_refData = new wxRegionRefData();
+
+#ifdef __WXGTK3__
+ M_REGIONDATA->m_region = cairo_region_create_rectangle(&rect);
+#else
+ M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
+#endif
+}
-wxRegionRefData::~wxRegionRefData(void)
+#ifndef __WXGTK3__
+wxRegion::wxRegion(const GdkRegion* region)
{
- if (m_region) gdk_region_destroy( m_region );
-};
+ m_refData = new wxRegionRefData();
+ M_REGIONDATA->m_region = gdk_region_copy(const_cast<GdkRegion*>(region));
+}
+#endif
-//-----------------------------------------------------------------------------
+wxRegion::wxRegion( size_t n, const wxPoint *points,
+ wxPolygonFillMode fillStyle )
+{
+#ifdef __WXGTK3__
+ // Make a cairo path from the points, draw it onto an image surface, use
+ // gdk_cairo_region_create_from_surface() to get a cairo region
+
+ // need at least 3 points to make a useful polygon
+ if (n < 3)
+ return;
+ // get bounding rect
+ int min_x = points[0].x;
+ int max_x = min_x;
+ int min_y = points[0].y;
+ int max_y = min_y;
+ size_t i;
+ for (i = 1; i < n; i++)
+ {
+ const int x = points[i].x;
+ if (min_x > x)
+ min_x = x;
+ else if (max_x < x)
+ max_x = x;
+ const int y = points[i].y;
+ if (min_y > y)
+ min_y = y;
+ else if (max_y < y)
+ max_y = y;
+ }
+ const int w = max_x - min_x + 1;
+ const int h = max_y - min_y + 1;
+ // make surface just big enough to contain polygon (A1 is native format
+ // for gdk_cairo_region_create_from_surface)
+ cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_A1, w, h);
+ memset(cairo_image_surface_get_data(surface), 0, cairo_image_surface_get_stride(surface) * h);
+ cairo_surface_mark_dirty(surface);
+ cairo_surface_set_device_offset(surface, -min_x, -min_y);
+ cairo_t* cr = cairo_create(surface);
+ cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
+ if (fillStyle == wxODDEVEN_RULE)
+ cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
+ // make path
+ cairo_move_to(cr, points[0].x, points[0].y);
+ for (i = 1; i < n; i++)
+ cairo_line_to(cr, points[i].x, points[i].y);
+ cairo_close_path(cr);
+ cairo_fill(cr);
+ cairo_destroy(cr);
+ cairo_surface_flush(surface);
+ m_refData = new wxRegionRefData;
+ M_REGIONDATA->m_region = gdk_cairo_region_create_from_surface(surface);
+ cairo_surface_destroy(surface);
+#else
+ 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;
+#endif
+}
-#define M_REGIONDATA ((wxRegionRefData *)m_refData)
+wxRegion::~wxRegion()
+{
+ // m_refData unrefed in ~wxObject
+}
-IMPLEMENT_DYNAMIC_CLASS(wxRegion,wxGDIObject);
-
-wxRegion::wxRegion( long x, long y, long w, long h )
+wxGDIRefData *wxRegion::CreateGDIRefData() const
{
- m_refData = new wxRegionRefData();
- GdkRegion *reg = gdk_region_new();
- GdkRectangle rect;
- rect.x = x;
- rect.y = y;
- rect.width = w;
- rect.height = h;
- M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
- gdk_region_destroy( reg );
-};
+ // should never be called
+ wxFAIL;
+ return NULL;
+}
-wxRegion::wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
-{
- m_refData = new wxRegionRefData();
- GdkRegion *reg = gdk_region_new();
- GdkRectangle rect;
- rect.x = topLeft.x;
- rect.y = topLeft.y;
- rect.width = bottomRight.x - rect.x;
- rect.height = bottomRight.y - rect.y;
- M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
- gdk_region_destroy( reg );
-};
+wxGDIRefData *wxRegion::CloneGDIRefData(const wxGDIRefData *data) const
+{
+ return new wxRegionRefData(*static_cast<const wxRegionRefData*>(data));
+}
-wxRegion::wxRegion( const wxRect& rect )
-{
- m_refData = new wxRegionRefData();
- GdkRegion *reg = gdk_region_new();
- GdkRectangle g_rect;
- g_rect.x = rect.x;
- g_rect.y = rect.y;
- g_rect.width = rect.width;
- g_rect.height = rect.height;
- M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &g_rect );
- gdk_region_destroy( reg );
-};
+// ----------------------------------------------------------------------------
+// wxRegion comparison
+// ----------------------------------------------------------------------------
-wxRegion::wxRegion(void)
+bool wxRegion::DoIsEqual(const wxRegion& region) const
{
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
-};
+#ifdef __WXGTK3__
+ return cairo_region_equal(
+ M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
+#else
+ return gdk_region_equal(M_REGIONDATA->m_region,
+ M_REGIONDATA_OF(region)->m_region) != 0;
+#endif
+}
+
+// ----------------------------------------------------------------------------
+// wxRegion operations
+// ----------------------------------------------------------------------------
-wxRegion::~wxRegion(void)
+void wxRegion::Clear()
{
-};
+ UnRef();
+}
-void wxRegion::Clear(void)
+bool wxRegion::DoUnionWithRect(const wxRect& r)
{
- UnRef();
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
-};
+ // 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 ( r.IsEmpty() )
+ return true;
+
+ if ( !m_refData )
+ {
+ InitRect(r.x, r.y, r.width, r.height);
+ }
+ else
+ {
+ AllocExclusive();
+
+ GdkRectangle rect;
+ rect.x = r.x;
+ rect.y = r.y;
+ rect.width = r.width;
+ rect.height = r.height;
+
+#ifdef __WXGTK3__
+ cairo_region_union_rectangle(M_REGIONDATA->m_region, &rect);
+#else
+ gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
+#endif
+ }
-bool wxRegion::Union( long x, long y, long width, long height )
-{
- 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;
-};
+ return true;
+}
-bool wxRegion::Union( const wxRect& rect )
-{
- GdkRectangle g_rect;
- g_rect.x = rect.x;
- g_rect.y = rect.y;
- g_rect.width = rect.width;
- g_rect.height = rect.height;
- GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &g_rect );
- gdk_region_destroy( M_REGIONDATA->m_region );
- M_REGIONDATA->m_region = reg;
- return TRUE;
-};
+bool wxRegion::DoUnionWithRegion( const wxRegion& region )
+{
+ if (region.m_refData == NULL)
+ { }
+ else if (m_refData == NULL)
+ {
+ m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
+ }
+ else
+ {
+ AllocExclusive();
+#ifdef __WXGTK3__
+ cairo_region_union(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
+#else
+ gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
+#endif
+ }
+
+ return true;
+}
-bool wxRegion::Union( const wxRegion& region )
+bool wxRegion::DoIntersect( const wxRegion& region )
{
- 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;
-};
+ if (region.m_refData == NULL || m_refData == NULL)
+ return false;
+
+ AllocExclusive();
+
+#ifdef __WXGTK3__
+ cairo_region_intersect(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
+#else
+ gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
+#endif
+
+ return true;
+}
-bool wxRegion::Intersect( long x, long y, long width, long height )
+bool wxRegion::DoSubtract( const wxRegion& region )
{
- wxRegion reg( x, y, width, height );
- Intersect( reg );
- return TRUE;
-};
+ if (region.m_refData == NULL || m_refData == NULL)
+ return false;
-bool wxRegion::Intersect( const wxRect& rect )
+ AllocExclusive();
+
+#ifdef __WXGTK3__
+ cairo_region_subtract(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
+#else
+ gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
+#endif
+
+ return true;
+}
+
+bool wxRegion::DoXor( const wxRegion& region )
{
- wxRegion reg( rect );
- Intersect( reg );
- return TRUE;
-};
+ if (region.m_refData == NULL)
+ { }
+ else if (m_refData == NULL)
+ {
+ // XOR-ing with an invalid region is the same as XOR-ing with an empty
+ // one, i.e. it is simply a copy.
+ m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
+ }
+ else
+ {
+ AllocExclusive();
+
+#ifdef __WXGTK3__
+ cairo_region_xor(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
+#else
+ gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
+#endif
+ }
-bool wxRegion::Intersect( const wxRegion& region )
+ return true;
+}
+
+bool wxRegion::DoOffset( wxCoord x, wxCoord y )
{
- 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;
-};
+ wxCHECK_MSG( m_refData, false, wxS("invalid region") );
+
+ AllocExclusive();
+
+#ifdef __WXGTK3__
+ cairo_region_translate(M_REGIONDATA->m_region, x, y);
+#else
+ gdk_region_offset( M_REGIONDATA->m_region, x, y );
+#endif
+
+ return true;
+}
-bool wxRegion::Subtract( long x, long y, long width, long height )
+// ----------------------------------------------------------------------------
+// wxRegion tests
+// ----------------------------------------------------------------------------
+
+bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
{
- wxRegion reg( x, y, width, height );
- Subtract( reg );
- return TRUE;
-};
+ if ( m_refData )
+ {
+ GdkRectangle rect;
+#ifdef __WXGTK3__
+ cairo_region_get_extents(M_REGIONDATA->m_region, &rect);
+#else
+ gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
+#endif
+ x = rect.x;
+ y = rect.y;
+ w = rect.width;
+ h = rect.height;
+
+ return true;
+ }
+ else
+ {
+ x = 0;
+ y = 0;
+ w = -1;
+ h = -1;
+
+ return false;
+ }
+}
+
+bool wxRegion::IsEmpty() const
+{
+#ifdef __WXGTK3__
+ return m_refData == NULL || cairo_region_is_empty(M_REGIONDATA->m_region);
+#else
+ return m_refData == NULL || gdk_region_empty(M_REGIONDATA->m_region);
+#endif
+}
-bool wxRegion::Subtract( const wxRect& rect )
+wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const
{
- wxRegion reg( rect );
- Subtract( reg );
- return TRUE;
-};
+#ifdef __WXGTK3__
+ if (m_refData == NULL || !cairo_region_contains_point(M_REGIONDATA->m_region, x, y))
+#else
+ if (m_refData == NULL || !gdk_region_point_in(M_REGIONDATA->m_region, x, y))
+#endif
+ return wxOutRegion;
-bool wxRegion::Subtract( const wxRegion& region )
+ return wxInRegion;
+}
+
+wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const
{
- 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;
-};
+ if (!m_refData)
+ return wxOutRegion;
+
+ GdkRectangle rect;
+ rect.x = r.x;
+ rect.y = r.y;
+ rect.width = r.width;
+ rect.height = r.height;
+#ifdef __WXGTK3__
+ switch (cairo_region_contains_rectangle(M_REGIONDATA->m_region, &rect))
+ {
+ case CAIRO_REGION_OVERLAP_IN: return wxInRegion;
+ case CAIRO_REGION_OVERLAP_PART: return wxPartRegion;
+ default: break;
+ }
+#else
+ 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;
+ }
+#endif
+ return wxOutRegion;
+}
-bool wxRegion::Xor( long x, long y, long width, long height )
+#ifdef __WXGTK3__
+cairo_region_t* wxRegion::GetRegion() const
+#else
+GdkRegion *wxRegion::GetRegion() const
+#endif
{
- wxRegion reg( x, y, width, height );
- Xor( reg );
- return TRUE;
-};
+ if (!m_refData)
+ return NULL;
+
+ return M_REGIONDATA->m_region;
+}
+
+// ----------------------------------------------------------------------------
+// wxRegionIterator
+// ----------------------------------------------------------------------------
-bool wxRegion::Xor( const wxRect& rect )
+wxRegionIterator::wxRegionIterator()
{
- wxRegion reg( rect );
- Xor( reg );
- return TRUE;
-};
+ Init();
+ Reset();
+}
-bool wxRegion::Xor( const wxRegion& region )
+wxRegionIterator::wxRegionIterator( const wxRegion& region )
{
- 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;
-};
+ Init();
+ Reset(region);
+}
-void wxRegion::GetBox( long& x, long& y, long&w, long &h ) const
+void wxRegionIterator::Init()
{
- x = 0;
- y = 0;
- w = -1;
- h = -1;
-};
+ m_rects = NULL;
+ m_numRects = 0;
+}
-wxRect wxRegion::GetBox(void) const
+wxRegionIterator::~wxRegionIterator()
{
- return wxRect( 0, 0, -1, -1 );
-};
+ wxDELETEA(m_rects);
+}
-bool wxRegion::Empty(void) const
+void wxRegionIterator::CreateRects( const wxRegion& region )
{
- return gdk_region_empty( M_REGIONDATA->m_region );
-};
+ wxDELETEA(m_rects);
+ m_numRects = 0;
+
+#ifdef __WXGTK3__
+ cairo_region_t* cairoRegion = region.GetRegion();
+ if (cairoRegion == NULL)
+ return;
+ m_numRects = cairo_region_num_rectangles(cairoRegion);
+
+ if (m_numRects)
+ {
+ m_rects = new wxRect[m_numRects];
+ for (int i = 0; i < m_numRects; i++)
+ {
+ GdkRectangle gr;
+ cairo_region_get_rectangle(cairoRegion, i, &gr);
+ wxRect &wr = m_rects[i];
+ wr.x = gr.x;
+ wr.y = gr.y;
+ wr.width = gr.width;
+ wr.height = gr.height;
+ }
+ }
+#else
+ GdkRegion *gdkregion = region.GetRegion();
+ if (!gdkregion)
+ return;
+
+ GdkRectangle* gdkrects;
+ gdk_region_get_rectangles(gdkregion, &gdkrects, &m_numRects);
+
+ if (m_numRects)
+ {
+ m_rects = new wxRect[m_numRects];
+ for (int 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 );
+#endif
+}
-wxRegionContain wxRegion::Contains( long x, long y ) const
+void wxRegionIterator::Reset( const wxRegion& region )
{
- if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
- return wxInRegion;
- else
- return wxOutRegion;
-};
+ m_region = region;
+ CreateRects(region);
+ Reset();
+}
-wxRegionContain wxRegion::Contains( long x, long y, long w, long h ) const
-{
- 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;
-};
+bool wxRegionIterator::HaveRects() const
+{
+ return m_current < m_numRects;
+}
-GdkRegion *wxRegion::GetRegion(void) const
+wxRegionIterator& wxRegionIterator::operator ++ ()
{
- return M_REGIONDATA->m_region;
-};
+ 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, wxT("invalid wxRegionIterator") );
+
+ return m_rects[m_current].x;
+}
+
+wxCoord wxRegionIterator::GetY() const
+{
+ wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
+
+ return m_rects[m_current].y;
+}
+
+wxCoord wxRegionIterator::GetW() const
+{
+ wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
+
+ return m_rects[m_current].width;
+}
+
+wxCoord wxRegionIterator::GetH() const
+{
+ wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
+
+ return m_rects[m_current].height;
+}
+
+wxRect wxRegionIterator::GetRect() const
+{
+ wxRect r;
+ if( HaveRects() )
+ r = m_rects[m_current];
+
+ return r;
+}
+wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri)
+{
+ if (this != &ri)
+ {
+ wxDELETEA(m_rects);
+
+ m_current = ri.m_current;
+ m_numRects = ri.m_numRects;
+ if ( m_numRects )
+ {
+ m_rects = new wxRect[m_numRects];
+ memcpy(m_rects, ri.m_rects, m_numRects * sizeof m_rects[0]);
+ }
+ }
+ return *this;
+}
projects / wxWidgets.git / blobdiff