src/qt/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 <math.h>

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

#define RAD2DEG 57.2957795131

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

#if !USE_SHARED_LIBRARY
//IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxDC)
//IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxDC)
#endif


wxPaintDC::wxPaintDC(void)
{
};

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

wxPaintDC::~wxPaintDC(void)
{
};

void wxPaintDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
  wxColour *WXUNUSED(col), int WXUNUSED(style) )
{
};

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

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

};

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

};

void wxPaintDC::DrawArc( long x1, long y1, long x2, long y2, double xc, double 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 wxPaintDC::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 wxPaintDC::DrawPoint( long x, long y )
{
  if (!Ok()) return;

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

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

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

void wxPaintDC::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 wxPaintDC::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 wxPaintDC::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 wxPaintDC::CanDrawBitmap(void) const
{
  return TRUE;
};

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

};


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

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

};

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

};

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

};

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

};

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

  m_font = font;
};

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

  if (m_pen == pen) return;

  m_pen = pen;

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

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

  if (m_brush == brush) return;

  m_brush = brush;

  if (!m_brush.Ok()) return;

};

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

  if (m_backgroundBrush == brush) return;

  m_backgroundBrush = brush;

  if (!m_backgroundBrush.Ok()) return;

};

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

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

  if (m_textForegroundColour == col) return;

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

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

  if (m_textBackgroundColour == col) return;

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

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

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

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

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

};

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