src/stubs/dcclient.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dcclient.cpp
// Purpose:     wxClientDC class
// Author:      AUTHOR
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) AUTHOR
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "dcclient.h"
#endif

#include "wx/dcclient.h"
#include "wx/dcmemory.h"
#include "wx/region.h"
#include <math.h>

//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------

#define RAD2DEG 57.2957795131

//-----------------------------------------------------------------------------
// wxPaintDC
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)

/*
 * wxWindowDC
 */

wxWindowDC::wxWindowDC(void)
{
};

wxWindowDC::wxWindowDC( wxWindow *window )
{
};

wxWindowDC::~wxWindowDC(void)
{
};

void wxWindowDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
  const wxColour& WXUNUSED(col), int WXUNUSED(style) )
{
};

bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
{
  return FALSE;
};

void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 )
{
  if (!Ok()) return;

};

void wxWindowDC::CrossHair( long x, long y )
{
  if (!Ok()) return;

};

void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, long xc, long yc )
{
  if (!Ok()) return;

  long xx1 = XLOG2DEV(x1);
  long yy1 = YLOG2DEV(y1);
  long xx2 = XLOG2DEV(x2);
  long yy2 = YLOG2DEV(y2);
  long xxc = XLOG2DEV((long)xc);
  long yyc = YLOG2DEV((long)yc);
  double dx = xx1 - xxc;
  double dy = yy1 - yyc;
  double radius = sqrt(dx*dx+dy*dy);
  long   r      = (long)radius;
  double radius1, radius2;

  if (xx1 == xx2 && yy1 == yy2)
  {
    radius1 = 0.0;
    radius2 = 360.0;
  }
  else
  if (radius == 0.0)
  {
    radius1 = radius2 = 0.0;
  }
  else
  {
    radius1 = (xx1 - xxc == 0) ?
	    (yy1 - yyc < 0) ? 90.0 : -90.0 :
	    -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
    radius2 = (xx2 - xxc == 0) ?
	    (yy2 - yyc < 0) ? 90.0 : -90.0 :
	    -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
  };
  long alpha1 = long(radius1 * 64.0);
  long alpha2 = long((radius2 - radius1) * 64.0);
  while (alpha2 <= 0) alpha2 += 360*64;
  while (alpha1 > 360*64) alpha1 -= 360*64;

  if (m_brush.GetStyle() != wxTRANSPARENT) {};

  if (m_pen.GetStyle() != wxTRANSPARENT) {};

};

void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
{
  if (!Ok()) return;

  long xx = XLOG2DEV(x);
  long yy = YLOG2DEV(y);
  long ww = m_signX * XLOG2DEVREL(width);
  long hh = m_signY * YLOG2DEVREL(height);

  // CMB: handle -ve width and/or height
  if (ww < 0) { ww = -ww; xx = xx - ww; }
  if (hh < 0) { hh = -hh; yy = yy - hh; }

  long start = long(sa * 64.0);
  long end = long(ea * 64.0);
  if (m_brush.GetStyle() != wxTRANSPARENT) {};

  if (m_pen.GetStyle() != wxTRANSPARENT) {};
};

void wxWindowDC::DrawPoint( long x, long y )
{
  if (!Ok()) return;

  if (m_pen.GetStyle() != wxTRANSPARENT) {};
};

void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
{
  if (!Ok()) return;

  if (m_pen.GetStyle() == wxTRANSPARENT) return;

  for (int i = 0; i < n-1; i++)
  {
    long x1 = XLOG2DEV(points[i].x + xoffset);
    long x2 = XLOG2DEV(points[i+1].x + xoffset);
    long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
    long y2 = YLOG2DEV(points[i+1].y + yoffset);
  };
};

void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset )
{
  if (!Ok()) return;

  if (m_pen.GetStyle() == wxTRANSPARENT) return;

  wxNode *node = points->First();
  while (node->Next())
  {
    wxPoint *point = (wxPoint*)node->Data();
    wxPoint *npoint = (wxPoint*)node->Next()->Data();
    long x1 = XLOG2DEV(point->x + xoffset);
    long x2 = XLOG2DEV(npoint->x + xoffset);
    long y1 = YLOG2DEV(point->y + yoffset);    // and again...
    long y2 = YLOG2DEV(npoint->y + yoffset);
    node = node->Next();
  };
};

void wxWindowDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[],
  long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
{
  if (!Ok()) return;
};

void wxWindowDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset),
                             long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
{
  if (!Ok()) return;
};

void wxWindowDC::DrawRectangle( long x, long y, long width, long height )
{
  if (!Ok()) return;

  long xx = XLOG2DEV(x);
  long yy = YLOG2DEV(y);
  long ww = m_signX * XLOG2DEVREL(width);
  long hh = m_signY * YLOG2DEVREL(height);

  // CMB: draw nothing if transformed w or h is 0
  if (ww == 0 || hh == 0) return;

  // CMB: handle -ve width and/or height
  if (ww < 0) { ww = -ww; xx = xx - ww; }
  if (hh < 0) { hh = -hh; yy = yy - hh; }

  if (m_brush.GetStyle() != wxTRANSPARENT) {};

  if (m_pen.GetStyle() != wxTRANSPARENT) {};
};

void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
{
  if (!Ok()) return;

  if (radius < 0.0) radius = - radius * ((width < height) ? width : height);

  long xx = XLOG2DEV(x);
  long yy = YLOG2DEV(y);
  long ww = m_signX * XLOG2DEVREL(width);
  long hh = m_signY * YLOG2DEVREL(height);
  long rr = XLOG2DEVREL((long)radius);

  // CMB: handle -ve width and/or height
  if (ww < 0) { ww = -ww; xx = xx - ww; }
  if (hh < 0) { hh = -hh; yy = yy - hh; }

  // CMB: if radius is zero use DrawRectangle() instead to avoid
  // X drawing errors with small radii
  if (rr == 0)
  {
    DrawRectangle( x, y, width, height );
    return;
  }

  // CMB: draw nothing if transformed w or h is 0
  if (ww == 0 || hh == 0) return;

  // CMB: adjust size if outline is drawn otherwise the result is
  // 1 pixel too wide and high
  if (m_pen.GetStyle() != wxTRANSPARENT)
  {
    ww--;
    hh--;
  }

  // CMB: ensure dd is not larger than rectangle otherwise we
  // get an hour glass shape
  long dd = 2 * rr;
  if (dd > ww) dd = ww;
  if (dd > hh) dd = hh;
  rr = dd / 2;

  if (m_brush.GetStyle() != wxTRANSPARENT)
  {
  };

  if (m_pen.GetStyle() != wxTRANSPARENT)
  {
  };
};

void wxWindowDC::DrawEllipse( long x, long y, long width, long height )
{
  if (!Ok()) return;

  long xx = XLOG2DEV(x);
  long yy = YLOG2DEV(y);
  long ww = m_signX * XLOG2DEVREL(width);
  long hh = m_signY * YLOG2DEVREL(height);

  // CMB: handle -ve width and/or height
  if (ww < 0) { ww = -ww; xx = xx - ww; }
  if (hh < 0) { hh = -hh; yy = yy - hh; }

  if (m_brush.GetStyle() != wxTRANSPARENT) {};

  if (m_pen.GetStyle() != wxTRANSPARENT) {};
};

bool wxWindowDC::CanDrawBitmap(void) const
{
  return TRUE;
};

void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
{
  if (!Ok()) return;

  if (!icon.Ok()) return;

  int xx = XLOG2DEV(x);
  int yy = YLOG2DEV(y);

};

bool wxWindowDC::Blit( long xdest, long ydest, long width, long height,
       wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) )
{
  if (!Ok()) return FALSE;

  // CMB 20/5/98: add blitting of bitmaps
  if (source->IsKindOf(CLASSINFO(wxMemoryDC)))
  {
    wxMemoryDC* srcDC = (wxMemoryDC*)source;
    /*
     GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
    if (bmap)
    {
      gdk_draw_bitmap (
          m_window,
          m_textGC,
          bmap,
          source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc),
          XLOG2DEV(xdest), YLOG2DEV(ydest),
          source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height)
          );
      return TRUE;
    }
    */
  }

  return TRUE;
};

void wxWindowDC::DrawText( const wxString &text, long x, long y, bool
WXUNUSED(use16) )
{
  if (!Ok()) return;

};


bool wxWindowDC::CanGetTextExtent(void) const
{
  return TRUE;
};

void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
                     long *WXUNUSED(descent), long *WXUNUSED(externalLeading),
                     wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) )
{
  if (!Ok()) return;

};

long wxWindowDC::GetCharWidth(void)
{
  if (!Ok()) return 0;
  return 0;
};

long wxWindowDC::GetCharHeight(void)
{
  if (!Ok()) return 0;
  return 0;
};

void wxWindowDC::Clear(void)
{
  if (!Ok()) return;

};

void wxWindowDC::SetFont( const wxFont &font )
{
  if (!Ok()) return;

  m_font = font;
};

void wxWindowDC::SetPen( const wxPen &pen )
{
  if (!Ok()) return;

  if (m_pen == pen) return;

  m_pen = pen;

  if (!m_pen.Ok()) return;
};

void wxWindowDC::SetBrush( const wxBrush &brush )
{
  if (!Ok()) return;

  if (m_brush == brush) return;

  m_brush = brush;

  if (!m_brush.Ok()) return;

};

void wxWindowDC::SetBackground( const wxBrush &brush )
{
  if (!Ok()) return;

  if (m_backgroundBrush == brush) return;

  m_backgroundBrush = brush;

  if (!m_backgroundBrush.Ok()) return;

};

void wxWindowDC::SetLogicalFunction( int function )
{
  if (m_logicalFunction == function) return;
};

void wxWindowDC::SetTextForeground( const wxColour &col )
{
  if (!Ok()) return;

  if (m_textForegroundColour == col) return;

  m_textForegroundColour = col;
  if (!m_textForegroundColour.Ok()) return;
};

void wxWindowDC::SetTextBackground( const wxColour &col )
{
  if (!Ok()) return;

  if (m_textBackgroundColour == col) return;

  m_textBackgroundColour = col;
  if (!m_textBackgroundColour.Ok()) return;
};

void wxWindowDC::SetBackgroundMode( int mode )
{
  m_backgroundMode = mode;

  if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
  {
  }
};

void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
{
};

void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
{
  wxDC::SetClippingRegion( x, y, width, height );

  // TODO

};

void wxWindowDC::SetClippingRegion( const wxRegion& region )
{
  wxRect box = region.GetBox();

  wxDC::SetClippingRegion( box.x, box.y, box.width, box.height );

  // TODO
}

void wxWindowDC::DestroyClippingRegion(void)
{
  wxDC::DestroyClippingRegion();

};

// ----------------------------------- spline code ----------------------------------------

void wx_quadratic_spline(double a1, double b1, double a2, double b2,
                         double a3, double b3, double a4, double b4);
void wx_clear_stack(void);
int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
        double *y3, double *x4, double *y4);
void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
          double x4, double y4);
static bool wx_spline_add_point(double x, double y);
static void wx_spline_draw_point_array(wxDC *dc);

wxList wx_spline_point_list;

#define		half(z1, z2)	((z1+z2)/2.0)
#define		THRESHOLD	5

/* iterative version */

void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
                 double b4)
{
    register double  xmid, ymid;
    double           x1, y1, x2, y2, x3, y3, x4, y4;

    wx_clear_stack();
    wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);

    while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
        xmid = (double)half(x2, x3);
        ymid = (double)half(y2, y3);
	if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
	    fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
            wx_spline_add_point( x1, y1 );
            wx_spline_add_point( xmid, ymid );
	} else {
            wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
                 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
            wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
                 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
	}
    }
}

/* utilities used by spline drawing routines */

typedef struct wx_spline_stack_struct {
    double           x1, y1, x2, y2, x3, y3, x4, y4;
} Stack;

#define         SPLINE_STACK_DEPTH             20
static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
static Stack   *wx_stack_top;
static int      wx_stack_count;

void wx_clear_stack(void)
{
    wx_stack_top = wx_spline_stack;
    wx_stack_count = 0;
}

void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
{
    wx_stack_top->x1 = x1;
    wx_stack_top->y1 = y1;
    wx_stack_top->x2 = x2;
    wx_stack_top->y2 = y2;
    wx_stack_top->x3 = x3;
    wx_stack_top->y3 = y3;
    wx_stack_top->x4 = x4;
    wx_stack_top->y4 = y4;
    wx_stack_top++;
    wx_stack_count++;
}

int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
                  double *x3, double *y3, double *x4, double *y4)
{
    if (wx_stack_count == 0)
	return (0);
    wx_stack_top--;
    wx_stack_count--;
    *x1 = wx_stack_top->x1;
    *y1 = wx_stack_top->y1;
    *x2 = wx_stack_top->x2;
    *y2 = wx_stack_top->y2;
    *x3 = wx_stack_top->x3;
    *y3 = wx_stack_top->y3;
    *x4 = wx_stack_top->x4;
    *y4 = wx_stack_top->y4;
    return (1);
}

static bool wx_spline_add_point(double x, double y)
{
  wxPoint *point = new wxPoint ;
  point->x = (int) x;
  point->y = (int) y;
  wx_spline_point_list.Append((wxObject*)point);
  return TRUE;
}

static void wx_spline_draw_point_array(wxDC *dc)
{
  dc->DrawLines(&wx_spline_point_list, 0, 0 );
  wxNode *node = wx_spline_point_list.First();
  while (node)
  {
    wxPoint *point = (wxPoint *)node->Data();
    delete point;
    delete node;
    node = wx_spline_point_list.First();
  }
}

void wxWindowDC::DrawSpline( wxList *points )
{
    wxPoint *p;
    double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
    double           x1, y1, x2, y2;

    wxNode *node = points->First();
    p = (wxPoint *)node->Data();

    x1 = p->x;
    y1 = p->y;

    node = node->Next();
    p = (wxPoint *)node->Data();

    x2 = p->x;
    y2 = p->y;
    cx1 = (double)((x1 + x2) / 2);
    cy1 = (double)((y1 + y2) / 2);
    cx2 = (double)((cx1 + x2) / 2);
    cy2 = (double)((cy1 + y2) / 2);

    wx_spline_add_point(x1, y1);

    while ((node = node->Next()) != NULL)
    {
        p = (wxPoint *)node->Data();
	x1 = x2;
	y1 = y2;
	x2 = p->x;
	y2 = p->y;
        cx4 = (double)(x1 + x2) / 2;
        cy4 = (double)(y1 + y2) / 2;
        cx3 = (double)(x1 + cx4) / 2;
        cy3 = (double)(y1 + cy4) / 2;

        wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);

	cx1 = cx4;
	cy1 = cy4;
        cx2 = (double)(cx1 + x2) / 2;
        cy2 = (double)(cy1 + y2) / 2;
    }

    wx_spline_add_point( cx1, cy1 );
    wx_spline_add_point( x2, y2 );

    wx_spline_draw_point_array( this );
};
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dcclient.cpp
	3	// Purpose: wxClientDC class
	4	// Author: AUTHOR
	5	// Modified by:
	6	// Created: 01/02/97
	7	// RCS-ID: $Id$
	8	// Copyright: (c) AUTHOR
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "dcclient.h"
	14	#endif
	15
	16	#include "wx/dcclient.h"
	17	#include "wx/dcmemory.h"
	18	#include "wx/region.h"
	19	#include <math.h>
	20
	21	//-----------------------------------------------------------------------------
	22	// constants
	23	//-----------------------------------------------------------------------------
	24
	25	#define RAD2DEG 57.2957795131
	26
	27	//-----------------------------------------------------------------------------
	28	// wxPaintDC
	29	//-----------------------------------------------------------------------------
	30
	31	IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
	32	IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
	33	IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
	34
	35	/*
	36	* wxWindowDC
	37	*/
	38
	39	wxWindowDC::wxWindowDC(void)
	40	{
	41	};
	42
	43	wxWindowDC::wxWindowDC( wxWindow *window )
	44	{
	45	};
	46
	47	wxWindowDC::~wxWindowDC(void)
	48	{
	49	};
	50
	51	void wxWindowDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
	52	const wxColour& WXUNUSED(col), int WXUNUSED(style) )
	53	{
	54	};
	55
	56	bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
	57	{
	58	return FALSE;
	59	};
	60
	61	void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 )
	62	{
	63	if (!Ok()) return;
	64
	65	};
	66
	67	void wxWindowDC::CrossHair( long x, long y )
	68	{
	69	if (!Ok()) return;
	70
	71	};
	72
	73	void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, long xc, long yc )
	74	{
	75	if (!Ok()) return;
	76
	77	long xx1 = XLOG2DEV(x1);
	78	long yy1 = YLOG2DEV(y1);
	79	long xx2 = XLOG2DEV(x2);
	80	long yy2 = YLOG2DEV(y2);
	81	long xxc = XLOG2DEV((long)xc);
	82	long yyc = YLOG2DEV((long)yc);
	83	double dx = xx1 - xxc;
	84	double dy = yy1 - yyc;
	85	double radius = sqrt(dxdx+dydy);
	86	long r = (long)radius;
	87	double radius1, radius2;
	88
	89	if (xx1 == xx2 && yy1 == yy2)
	90	{
	91	radius1 = 0.0;
	92	radius2 = 360.0;
	93	}
	94	else
	95	if (radius == 0.0)
	96	{
	97	radius1 = radius2 = 0.0;
	98	}
	99	else
	100	{
	101	radius1 = (xx1 - xxc == 0) ?
	102	(yy1 - yyc < 0) ? 90.0 : -90.0 :
	103	-atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
	104	radius2 = (xx2 - xxc == 0) ?
	105	(yy2 - yyc < 0) ? 90.0 : -90.0 :
	106	-atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
	107	};
	108	long alpha1 = long(radius1 * 64.0);
	109	long alpha2 = long((radius2 - radius1) * 64.0);
	110	while (alpha2 <= 0) alpha2 += 360*64;
	111	while (alpha1 > 36064) alpha1 -= 36064;
	112
	113	if (m_brush.GetStyle() != wxTRANSPARENT) {};
	114
	115	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	116
	117	};
	118
	119	void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
	120	{
	121	if (!Ok()) return;
	122
	123	long xx = XLOG2DEV(x);
	124	long yy = YLOG2DEV(y);
	125	long ww = m_signX * XLOG2DEVREL(width);
	126	long hh = m_signY * YLOG2DEVREL(height);
	127
	128	// CMB: handle -ve width and/or height
	129	if (ww < 0) { ww = -ww; xx = xx - ww; }
	130	if (hh < 0) { hh = -hh; yy = yy - hh; }
	131
	132	long start = long(sa * 64.0);
	133	long end = long(ea * 64.0);
	134	if (m_brush.GetStyle() != wxTRANSPARENT) {};
	135
	136	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	137	};
	138
	139	void wxWindowDC::DrawPoint( long x, long y )
	140	{
	141	if (!Ok()) return;
	142
	143	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	144	};
	145
	146	void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
	147	{
	148	if (!Ok()) return;
	149
	150	if (m_pen.GetStyle() == wxTRANSPARENT) return;
	151
	152	for (int i = 0; i < n-1; i++)
	153	{
	154	long x1 = XLOG2DEV(points[i].x + xoffset);
	155	long x2 = XLOG2DEV(points[i+1].x + xoffset);
	156	long y1 = YLOG2DEV(points[i].y + yoffset); // oh, what a waste
	157	long y2 = YLOG2DEV(points[i+1].y + yoffset);
	158	};
	159	};
	160
	161	void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset )
	162	{
	163	if (!Ok()) return;
	164
	165	if (m_pen.GetStyle() == wxTRANSPARENT) return;
	166
	167	wxNode *node = points->First();
	168	while (node->Next())
	169	{
	170	wxPoint point = (wxPoint)node->Data();
	171	wxPoint npoint = (wxPoint)node->Next()->Data();
	172	long x1 = XLOG2DEV(point->x + xoffset);
	173	long x2 = XLOG2DEV(npoint->x + xoffset);
	174	long y1 = YLOG2DEV(point->y + yoffset); // and again...
	175	long y2 = YLOG2DEV(npoint->y + yoffset);
	176	node = node->Next();
	177	};
	178	};
	179
	180	void wxWindowDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[],
	181	long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
	182	{
	183	if (!Ok()) return;
	184	};
	185
	186	void wxWindowDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset),
	187	long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
	188	{
	189	if (!Ok()) return;
	190	};
	191
	192	void wxWindowDC::DrawRectangle( long x, long y, long width, long height )
	193	{
	194	if (!Ok()) return;
	195
	196	long xx = XLOG2DEV(x);
	197	long yy = YLOG2DEV(y);
	198	long ww = m_signX * XLOG2DEVREL(width);
	199	long hh = m_signY * YLOG2DEVREL(height);
	200
	201	// CMB: draw nothing if transformed w or h is 0
	202	if (ww == 0 \|\| hh == 0) return;
	203
	204	// CMB: handle -ve width and/or height
	205	if (ww < 0) { ww = -ww; xx = xx - ww; }
	206	if (hh < 0) { hh = -hh; yy = yy - hh; }
	207
	208	if (m_brush.GetStyle() != wxTRANSPARENT) {};
	209
	210	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	211	};
	212
	213	void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
	214	{
	215	if (!Ok()) return;
	216
	217	if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
	218
	219	long xx = XLOG2DEV(x);
	220	long yy = YLOG2DEV(y);
	221	long ww = m_signX * XLOG2DEVREL(width);
	222	long hh = m_signY * YLOG2DEVREL(height);
	223	long rr = XLOG2DEVREL((long)radius);
	224
	225	// CMB: handle -ve width and/or height
	226	if (ww < 0) { ww = -ww; xx = xx - ww; }
	227	if (hh < 0) { hh = -hh; yy = yy - hh; }
	228
	229	// CMB: if radius is zero use DrawRectangle() instead to avoid
	230	// X drawing errors with small radii
	231	if (rr == 0)
	232	{
	233	DrawRectangle( x, y, width, height );
	234	return;
	235	}
	236
	237	// CMB: draw nothing if transformed w or h is 0
	238	if (ww == 0 \|\| hh == 0) return;
	239
	240	// CMB: adjust size if outline is drawn otherwise the result is
	241	// 1 pixel too wide and high
	242	if (m_pen.GetStyle() != wxTRANSPARENT)
	243	{
	244	ww--;
	245	hh--;
	246	}
	247
	248	// CMB: ensure dd is not larger than rectangle otherwise we
	249	// get an hour glass shape
	250	long dd = 2 * rr;
	251	if (dd > ww) dd = ww;
	252	if (dd > hh) dd = hh;
	253	rr = dd / 2;
	254
	255	if (m_brush.GetStyle() != wxTRANSPARENT)
	256	{
	257	};
	258
	259	if (m_pen.GetStyle() != wxTRANSPARENT)
	260	{
	261	};
	262	};
	263
	264	void wxWindowDC::DrawEllipse( long x, long y, long width, long height )
	265	{
	266	if (!Ok()) return;
	267
	268	long xx = XLOG2DEV(x);
	269	long yy = YLOG2DEV(y);
	270	long ww = m_signX * XLOG2DEVREL(width);
	271	long hh = m_signY * YLOG2DEVREL(height);
	272
	273	// CMB: handle -ve width and/or height
	274	if (ww < 0) { ww = -ww; xx = xx - ww; }
	275	if (hh < 0) { hh = -hh; yy = yy - hh; }
	276
	277	if (m_brush.GetStyle() != wxTRANSPARENT) {};
	278
	279	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	280	};
	281
	282	bool wxWindowDC::CanDrawBitmap(void) const
	283	{
	284	return TRUE;
	285	};
	286
	287	void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
	288	{
	289	if (!Ok()) return;
	290
	291	if (!icon.Ok()) return;
	292
	293	int xx = XLOG2DEV(x);
	294	int yy = YLOG2DEV(y);
	295
	296	};
	297
	298	bool wxWindowDC::Blit( long xdest, long ydest, long width, long height,
	299	wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) )
	300	{
	301	if (!Ok()) return FALSE;
	302
	303	// CMB 20/5/98: add blitting of bitmaps
	304	if (source->IsKindOf(CLASSINFO(wxMemoryDC)))
	305	{
	306	wxMemoryDC* srcDC = (wxMemoryDC*)source;
	307	/*
	308	GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
	309	if (bmap)
	310	{
	311	gdk_draw_bitmap (
	312	m_window,
	313	m_textGC,
	314	bmap,
	315	source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc),
	316	XLOG2DEV(xdest), YLOG2DEV(ydest),
	317	source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height)
	318	);
	319	return TRUE;
	320	}
	321	*/
	322	}
	323
	324	return TRUE;
	325	};
	326
	327	void wxWindowDC::DrawText( const wxString &text, long x, long y, bool
	328	WXUNUSED(use16) )
	329	{
	330	if (!Ok()) return;
	331
	332	};
	333
	334
	335
	336	bool wxWindowDC::CanGetTextExtent(void) const
	337	{
	338	return TRUE;
	339	};
	340
	341	void wxWindowDC::GetTextExtent( const wxString &string, long width, long height,
	342	long WXUNUSED(descent), long WXUNUSED(externalLeading),
	343	wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) )
	344	{
	345	if (!Ok()) return;
	346
	347	};
	348
	349	long wxWindowDC::GetCharWidth(void)
	350	{
	351	if (!Ok()) return 0;
	352	return 0;
	353	};
	354
	355	long wxWindowDC::GetCharHeight(void)
	356	{
	357	if (!Ok()) return 0;
	358	return 0;
	359	};
	360
	361	void wxWindowDC::Clear(void)
	362	{
	363	if (!Ok()) return;
	364
	365	};
	366
	367	void wxWindowDC::SetFont( const wxFont &font )
	368	{
	369	if (!Ok()) return;
	370
	371	m_font = font;
	372	};
	373
	374	void wxWindowDC::SetPen( const wxPen &pen )
	375	{
	376	if (!Ok()) return;
	377
	378	if (m_pen == pen) return;
	379
	380	m_pen = pen;
	381
	382	if (!m_pen.Ok()) return;
	383	};
	384
	385	void wxWindowDC::SetBrush( const wxBrush &brush )
	386	{
	387	if (!Ok()) return;
	388
	389	if (m_brush == brush) return;
	390
	391	m_brush = brush;
	392
	393	if (!m_brush.Ok()) return;
	394
	395	};
	396
	397	void wxWindowDC::SetBackground( const wxBrush &brush )
	398	{
	399	if (!Ok()) return;
	400
	401	if (m_backgroundBrush == brush) return;
	402
	403	m_backgroundBrush = brush;
	404
	405	if (!m_backgroundBrush.Ok()) return;
	406
	407	};
	408
	409	void wxWindowDC::SetLogicalFunction( int function )
	410	{
	411	if (m_logicalFunction == function) return;
	412	};
	413
	414	void wxWindowDC::SetTextForeground( const wxColour &col )
	415	{
	416	if (!Ok()) return;
	417
	418	if (m_textForegroundColour == col) return;
	419
	420	m_textForegroundColour = col;
	421	if (!m_textForegroundColour.Ok()) return;
	422	};
	423
	424	void wxWindowDC::SetTextBackground( const wxColour &col )
	425	{
	426	if (!Ok()) return;
	427
	428	if (m_textBackgroundColour == col) return;
	429
	430	m_textBackgroundColour = col;
	431	if (!m_textBackgroundColour.Ok()) return;
	432	};
	433
	434	void wxWindowDC::SetBackgroundMode( int mode )
	435	{
	436	m_backgroundMode = mode;
	437
	438	if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
	439	{
	440	}
	441	};
	442
	443	void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
	444	{
	445	};
	446
	447	void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
	448	{
	449	wxDC::SetClippingRegion( x, y, width, height );
	450
	451	// TODO
	452
	453	};
	454
	455	void wxWindowDC::SetClippingRegion( const wxRegion& region )
	456	{
	457	wxRect box = region.GetBox();
	458
	459	wxDC::SetClippingRegion( box.x, box.y, box.width, box.height );
	460
	461	// TODO
	462	}
	463
	464	void wxWindowDC::DestroyClippingRegion(void)
	465	{
	466	wxDC::DestroyClippingRegion();
	467
	468	};
	469
	470	// ----------------------------------- spline code ----------------------------------------
	471
	472	void wx_quadratic_spline(double a1, double b1, double a2, double b2,
	473	double a3, double b3, double a4, double b4);
	474	void wx_clear_stack(void);
	475	int wx_spline_pop(double x1, double y1, double x2, double y2, double *x3,
	476	double y3, double x4, double *y4);
	477	void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
	478	double x4, double y4);
	479	static bool wx_spline_add_point(double x, double y);
	480	static void wx_spline_draw_point_array(wxDC *dc);
	481
	482	wxList wx_spline_point_list;
	483
	484	#define half(z1, z2) ((z1+z2)/2.0)
	485	#define THRESHOLD 5
	486
	487	/* iterative version */
	488
	489	void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
	490	double b4)
	491	{
	492	register double xmid, ymid;
	493	double x1, y1, x2, y2, x3, y3, x4, y4;
	494
	495	wx_clear_stack();
	496	wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
	497
	498	while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
	499	xmid = (double)half(x2, x3);
	500	ymid = (double)half(y2, y3);
	501	if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
	502	fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
	503	wx_spline_add_point( x1, y1 );
	504	wx_spline_add_point( xmid, ymid );
	505	} else {
	506	wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
	507	(double)half(x3, x4), (double)half(y3, y4), x4, y4);
	508	wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
	509	(double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
	510	}
	511	}
	512	}
	513
	514	/* utilities used by spline drawing routines */
	515
	516	typedef struct wx_spline_stack_struct {
	517	double x1, y1, x2, y2, x3, y3, x4, y4;
	518	} Stack;
	519
	520	#define SPLINE_STACK_DEPTH 20
	521	static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
	522	static Stack *wx_stack_top;
	523	static int wx_stack_count;
	524
	525	void wx_clear_stack(void)
	526	{
	527	wx_stack_top = wx_spline_stack;
	528	wx_stack_count = 0;
	529	}
	530
	531	void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
	532	{
	533	wx_stack_top->x1 = x1;
	534	wx_stack_top->y1 = y1;
	535	wx_stack_top->x2 = x2;
	536	wx_stack_top->y2 = y2;
	537	wx_stack_top->x3 = x3;
	538	wx_stack_top->y3 = y3;
	539	wx_stack_top->x4 = x4;
	540	wx_stack_top->y4 = y4;
	541	wx_stack_top++;
	542	wx_stack_count++;
	543	}
	544
	545	int wx_spline_pop(double x1, double y1, double x2, double y2,
	546	double x3, double y3, double x4, double y4)
	547	{
	548	if (wx_stack_count == 0)
	549	return (0);
	550	wx_stack_top--;
	551	wx_stack_count--;
	552	*x1 = wx_stack_top->x1;
	553	*y1 = wx_stack_top->y1;
	554	*x2 = wx_stack_top->x2;
	555	*y2 = wx_stack_top->y2;
	556	*x3 = wx_stack_top->x3;
	557	*y3 = wx_stack_top->y3;
	558	*x4 = wx_stack_top->x4;
	559	*y4 = wx_stack_top->y4;
	560	return (1);
	561	}
	562
	563	static bool wx_spline_add_point(double x, double y)
	564	{
	565	wxPoint *point = new wxPoint ;
	566	point->x = (int) x;
	567	point->y = (int) y;
	568	wx_spline_point_list.Append((wxObject*)point);
	569	return TRUE;
	570	}
	571
	572	static void wx_spline_draw_point_array(wxDC *dc)
	573	{
	574	dc->DrawLines(&wx_spline_point_list, 0, 0 );
	575	wxNode *node = wx_spline_point_list.First();
	576	while (node)
	577	{
	578	wxPoint point = (wxPoint )node->Data();
	579	delete point;
	580	delete node;
	581	node = wx_spline_point_list.First();
	582	}
	583	}
	584
	585	void wxWindowDC::DrawSpline( wxList *points )
	586	{
	587	wxPoint *p;
	588	double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
	589	double x1, y1, x2, y2;
	590
	591	wxNode *node = points->First();
	592	p = (wxPoint *)node->Data();
	593
	594	x1 = p->x;
	595	y1 = p->y;
	596
	597	node = node->Next();
	598	p = (wxPoint *)node->Data();
	599
	600	x2 = p->x;
	601	y2 = p->y;
	602	cx1 = (double)((x1 + x2) / 2);
	603	cy1 = (double)((y1 + y2) / 2);
	604	cx2 = (double)((cx1 + x2) / 2);
	605	cy2 = (double)((cy1 + y2) / 2);
	606
	607	wx_spline_add_point(x1, y1);
	608
	609	while ((node = node->Next()) != NULL)
	610	{
	611	p = (wxPoint *)node->Data();
	612	x1 = x2;
	613	y1 = y2;
	614	x2 = p->x;
	615	y2 = p->y;
	616	cx4 = (double)(x1 + x2) / 2;
	617	cy4 = (double)(y1 + y2) / 2;
	618	cx3 = (double)(x1 + cx4) / 2;
	619	cy3 = (double)(y1 + cy4) / 2;
	620
	621	wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
	622
	623	cx1 = cx4;
	624	cy1 = cy4;
	625	cx2 = (double)(cx1 + x2) / 2;
	626	cy2 = (double)(cy1 + y2) / 2;
	627	}
	628
	629	wx_spline_add_point( cx1, cy1 );
	630	wx_spline_add_point( x2, y2 );
	631
	632	wx_spline_draw_point_array( this );
	633	};