[wxWidgets.git] / src / motif / dc.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dc.cpp
// Purpose:     wxDC class
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

#include "wx/dc.h"
#include "wx/dcmemory.h"

#if !USE_SHARED_LIBRARY
IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
#endif

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

#define mm2inches		0.0393700787402
#define inches2mm		25.4
#define mm2twips		56.6929133859
#define twips2mm		0.0176388888889
#define mm2pt			2.83464566929
#define pt2mm			0.352777777778

//-----------------------------------------------------------------------------
// wxDC
//-----------------------------------------------------------------------------

wxDC::wxDC(void)
{
  m_ok = FALSE;
  m_optimize = FALSE;
  m_colour = TRUE;
  m_clipping = FALSE;
  
  m_mm_to_pix_x = 1.0;
  m_mm_to_pix_y = 1.0;
  
  m_logicalOriginX = 0;
  m_logicalOriginY = 0;
  m_deviceOriginX = 0;
  m_deviceOriginY = 0;
  m_internalDeviceOriginX = 0;
  m_internalDeviceOriginY = 0;
  m_externalDeviceOriginX = 0;
  m_externalDeviceOriginY = 0;
  
  m_logicalScaleX = 1.0;
  m_logicalScaleY = 1.0;
  m_userScaleX = 1.0;
  m_userScaleY = 1.0;
  m_scaleX = 1.0;
  m_scaleY = 1.0;
  
  m_mappingMode = MM_TEXT;
  m_needComputeScaleX = FALSE;
  m_needComputeScaleY = FALSE;
  
  m_signX = 1;  // default x-axis left to right
  m_signY = 1;  // default y-axis top down

  m_maxX = m_maxY = -100000;
  m_minY = m_minY =  100000;

  m_logicalFunction = wxCOPY;
//  m_textAlignment = wxALIGN_TOP_LEFT;
  m_backgroundMode = wxTRANSPARENT;
  
  m_textForegroundColour = *wxBLACK;
  m_textBackgroundColour = *wxWHITE;
  m_pen = *wxBLACK_PEN;
  m_font = *wxNORMAL_FONT;
  m_brush = *wxTRANSPARENT_BRUSH;
  m_backgroundBrush = *wxWHITE_BRUSH;

  m_isInteractive = FALSE;
  
//  m_palette = wxAPP_COLOURMAP;
};

wxDC::~wxDC(void)
{
};

void wxDC::DrawIcon( const wxIcon &WXUNUSED(icon), long WXUNUSED(x), long WXUNUSED(y))
{
};

void wxDC::DrawBitmap( const wxBitmap& bitmap, long x, long y, bool useMask )
{
    if (!bitmap.Ok())
        return;

    wxMemoryDC memDC;
    memDC.SelectObject(bitmap);

/* Not sure if we need this. The mask should leave the
 * masked areas as per the original background of this DC.
    if (useMask)
    {
        // There might be transparent areas, so make these
        // the same colour as this DC
        memDC.SetBackground(* GetBackground());
        memDC.Clear();
    }
*/

    Blit(x, y, bitmap.GetWidth(), bitmap.GetHeight(), & memDC, 0, 0, wxCOPY, useMask);

    memDC.SelectObject(wxNullBitmap);
};


void wxDC::DrawPoint( wxPoint& point ) 
{ 
  DrawPoint( point.x, point.y ); 
};

void wxDC::DrawPolygon( wxList *list, long xoffset, long yoffset, int fillStyle )
{
  int n = list->Number();
  wxPoint *points = new wxPoint[n];

  int i = 0;
  for( wxNode *node = list->First(); node; node = node->Next() )
  {
    wxPoint *point = (wxPoint *)node->Data();
    points[i].x = point->x;
    points[i++].y = point->y;
  };
  DrawPolygon( n, points, xoffset, yoffset, fillStyle );
  delete[] points;
};

void wxDC::DrawLines( wxList *list, long xoffset, long yoffset )
{
  int n = list->Number();
  wxPoint *points = new wxPoint[n];

  int i = 0;
  for( wxNode *node = list->First(); node; node = node->Next() ) 
  {
    wxPoint *point = (wxPoint *)node->Data();
    points[i].x = point->x;
    points[i++].y = point->y;
  };
  DrawLines( n, points, xoffset, yoffset );
  delete []points;
};

void wxDC::DrawSpline( long x1, long y1, long x2, long y2, long x3, long y3 )
{
  wxList list;
  list.Append( (wxObject*)new wxPoint(x1, y1) );
  list.Append( (wxObject*)new wxPoint(x2, y2) );
  list.Append( (wxObject*)new wxPoint(x3, y3) );
  DrawSpline(&list);
  wxNode *node = list.First();
  while (node)
  {
    wxPoint *p = (wxPoint*)node->Data();
    delete p;
    node = node->Next();
  };
};

void wxDC::DrawSpline( int n, wxPoint points[] )
{
  wxList list;
  for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
  DrawSpline( &list );
};

void wxDC::SetClippingRegion( long x, long y, long width, long height )
{
  m_clipping = TRUE;
  m_clipX1 = x;
  m_clipY1 = y;
  m_clipX2 = x + width;
  m_clipY2 = y + height;
};

void wxDC::DestroyClippingRegion(void)
{
  m_clipping = FALSE;
};

void wxDC::GetClippingBox( long *x, long *y, long *width, long *height ) const
{
  if (m_clipping)
  {
    if (x) *x = m_clipX1;
    if (y) *y = m_clipY1;
    if (width) *width = (m_clipX2 - m_clipX1);
    if (height) *height = (m_clipY2 - m_clipY1);
  }
  else
   *x = *y = *width = *height = 0;
};

void wxDC::GetSize( int* width, int* height ) const
{
  *width = m_maxX-m_minX;
  *height = m_maxY-m_minY;
};

void wxDC::GetSizeMM( long* width, long* height ) const
{
  int w = 0;
  int h = 0;
  GetSize( &w, &h );
  *width = long( double(w) / (m_scaleX*m_mm_to_pix_x) );
  *height = long( double(h) / (m_scaleY*m_mm_to_pix_y) );
};

void wxDC::SetTextForeground( const wxColour &col )
{
  if (!Ok()) return;
  m_textForegroundColour = col;
};

void wxDC::SetTextBackground( const wxColour &col )
{
  if (!Ok()) return;
  m_textBackgroundColour = col;
};

void wxDC::SetMapMode( int mode )
{
  switch (mode) 
  {
    case MM_TWIPS:
      SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
      break;
    case MM_POINTS:
      SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
      break;
    case MM_METRIC:
      SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
      break;
    case MM_LOMETRIC:
      SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
      break;
    default:
    case MM_TEXT:
      SetLogicalScale( 1.0, 1.0 );
      break;
  };
  if (mode != MM_TEXT)
  {
    m_needComputeScaleX = TRUE;
    m_needComputeScaleY = TRUE;
  };
};

void wxDC::SetUserScale( double x, double y )
{
  // allow negative ? -> no
  m_userScaleX = x;
  m_userScaleY = y;
  ComputeScaleAndOrigin();
};

void wxDC::GetUserScale( double *x, double *y )
{
  if (x) *x = m_userScaleX;
  if (y) *y = m_userScaleY;
};

void wxDC::SetLogicalScale( double x, double y )
{
  // allow negative ?
  m_logicalScaleX = x;
  m_logicalScaleY = y;
  ComputeScaleAndOrigin();
};

void wxDC::GetLogicalScale( double *x, double *y )
{
  if (x) *x = m_logicalScaleX;
  if (y) *y = m_logicalScaleY;
};

void wxDC::SetLogicalOrigin( long x, long y )
{
  m_logicalOriginX = x * m_signX;   // is this still correct ?
  m_logicalOriginY = y * m_signY;
  ComputeScaleAndOrigin();
};

void wxDC::GetLogicalOrigin( long *x, long *y )
{
  if (x) *x = m_logicalOriginX;
  if (y) *y = m_logicalOriginY;
};

void wxDC::SetDeviceOrigin( long x, long y )
{
  m_externalDeviceOriginX = x;
  m_externalDeviceOriginY = y;
  ComputeScaleAndOrigin();
};

void wxDC::GetDeviceOrigin( long *x, long *y )
{
//  if (x) *x = m_externalDeviceOriginX;
//  if (y) *y = m_externalDeviceOriginY;
  if (x) *x = m_deviceOriginX;
  if (y) *y = m_deviceOriginY;
};

void wxDC::SetInternalDeviceOrigin( long x, long y )
{
  m_internalDeviceOriginX = x;
  m_internalDeviceOriginY = y;
  ComputeScaleAndOrigin();
};

void wxDC::GetInternalDeviceOrigin( long *x, long *y )
{
  if (x) *x = m_internalDeviceOriginX;
  if (y) *y = m_internalDeviceOriginY;
};

void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
{
  m_signX = (xLeftRight ?  1 : -1);
  m_signY = (yBottomUp  ? -1 :  1);
  ComputeScaleAndOrigin();
};

long wxDC::DeviceToLogicalX(long x) const
{
  return XDEV2LOG(x);
};

long wxDC::DeviceToLogicalY(long y) const
{
  return YDEV2LOG(y);
};

long wxDC::DeviceToLogicalXRel(long x) const
{
  return XDEV2LOGREL(x);
};

long wxDC::DeviceToLogicalYRel(long y) const
{
  return YDEV2LOGREL(y);
};

long wxDC::LogicalToDeviceX(long x) const
{
  return XLOG2DEV(x);
};

long wxDC::LogicalToDeviceY(long y) const
{
  return YLOG2DEV(y);
};

long wxDC::LogicalToDeviceXRel(long x) const
{
  return XLOG2DEVREL(x);
};

long wxDC::LogicalToDeviceYRel(long y) const
{
  return YLOG2DEVREL(y);
};
    
void wxDC::CalcBoundingBox( long x, long y )
{
  if (x < m_minX) m_minX = x;
  if (y < m_minY) m_minY = y;
  if (x > m_maxX) m_maxX = x;
  if (y > m_maxY) m_maxY = y;
};

void wxDC::ComputeScaleAndOrigin(void)
{
  // CMB: copy scale to see if it changes
  double origScaleX = m_scaleX;
  double origScaleY = m_scaleY;

  m_scaleX = m_logicalScaleX * m_userScaleX;
  m_scaleY = m_logicalScaleY * m_userScaleY;

  m_deviceOriginX = m_internalDeviceOriginX + m_externalDeviceOriginX;
  m_deviceOriginY = m_internalDeviceOriginY + m_externalDeviceOriginY;

  // CMB: if scale has changed call SetPen to recalulate the line width 
  if (m_scaleX != origScaleX || m_scaleY != origScaleY)
  {
    // this is a bit artificial, but we need to force wxDC to think
    // the pen has changed
    wxPen* pen = & GetPen();
    wxPen tempPen;
    m_pen = tempPen;
    SetPen(* pen);
  }
};
Commit	Line	Data
4bb6408c JS	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dc.cpp
	3	// Purpose: wxDC class
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 01/02/97
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "dc.h"
	14	#endif
	15
	16	#include "wx/dc.h"
a367b9b3	17	#include "wx/dcmemory.h"
4bb6408c JS	18
	19	#if !USE_SHARED_LIBRARY
	20	IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
	21	#endif
	22
	23	//-----------------------------------------------------------------------------
	24	// constants
	25	//-----------------------------------------------------------------------------
	26
	27	#define mm2inches 0.0393700787402
	28	#define inches2mm 25.4
	29	#define mm2twips 56.6929133859
	30	#define twips2mm 0.0176388888889
	31	#define mm2pt 2.83464566929
	32	#define pt2mm 0.352777777778
	33
	34	//-----------------------------------------------------------------------------
	35	// wxDC
	36	//-----------------------------------------------------------------------------
	37
	38	wxDC::wxDC(void)
	39	{
	40	m_ok = FALSE;
	41	m_optimize = FALSE;
4bb6408c JS	42	m_colour = TRUE;
	43	m_clipping = FALSE;
	44
	45	m_mm_to_pix_x = 1.0;
	46	m_mm_to_pix_y = 1.0;
	47
	48	m_logicalOriginX = 0;
	49	m_logicalOriginY = 0;
	50	m_deviceOriginX = 0;
	51	m_deviceOriginY = 0;
	52	m_internalDeviceOriginX = 0;
	53	m_internalDeviceOriginY = 0;
	54	m_externalDeviceOriginX = 0;
	55	m_externalDeviceOriginY = 0;
	56
	57	m_logicalScaleX = 1.0;
	58	m_logicalScaleY = 1.0;
	59	m_userScaleX = 1.0;
	60	m_userScaleY = 1.0;
	61	m_scaleX = 1.0;
	62	m_scaleY = 1.0;
	63
	64	m_mappingMode = MM_TEXT;
	65	m_needComputeScaleX = FALSE;
	66	m_needComputeScaleY = FALSE;
	67
	68	m_signX = 1; // default x-axis left to right
	69	m_signY = 1; // default y-axis top down
	70
	71	m_maxX = m_maxY = -100000;
	72	m_minY = m_minY = 100000;
	73
	74	m_logicalFunction = wxCOPY;
	75	// m_textAlignment = wxALIGN_TOP_LEFT;
	76	m_backgroundMode = wxTRANSPARENT;
	77
	78	m_textForegroundColour = *wxBLACK;
	79	m_textBackgroundColour = *wxWHITE;
	80	m_pen = *wxBLACK_PEN;
	81	m_font = *wxNORMAL_FONT;
	82	m_brush = *wxTRANSPARENT_BRUSH;
	83	m_backgroundBrush = *wxWHITE_BRUSH;
16c1f7f3 JS	84
16c1f7f3 JS	85	m_isInteractive = FALSE;
4bb6408c JS	86
	87	// m_palette = wxAPP_COLOURMAP;
	88	};
	89
	90	wxDC::~wxDC(void)
	91	{
	92	};
	93
793f619f	94	void wxDC::DrawIcon( const wxIcon &WXUNUSED(icon), long WXUNUSED(x), long WXUNUSED(y))
4bb6408c JS	95	{
	96	};
	97
a367b9b3 JS	98	void wxDC::DrawBitmap( const wxBitmap& bitmap, long x, long y, bool useMask )
	99	{
	100	if (!bitmap.Ok())
	101	return;
	102
	103	wxMemoryDC memDC;
	104	memDC.SelectObject(bitmap);
	105
	106	/* Not sure if we need this. The mask should leave the
	107	* masked areas as per the original background of this DC.
	108	if (useMask)
	109	{
	110	// There might be transparent areas, so make these
	111	// the same colour as this DC
	112	memDC.SetBackground(* GetBackground());
	113	memDC.Clear();
	114	}
	115	*/
	116
	117	Blit(x, y, bitmap.GetWidth(), bitmap.GetHeight(), & memDC, 0, 0, wxCOPY, useMask);
	118
	119	memDC.SelectObject(wxNullBitmap);
	120	};
	121
	122
4bb6408c JS	123	void wxDC::DrawPoint( wxPoint& point )
	124	{
	125	DrawPoint( point.x, point.y );
	126	};
	127
	128	void wxDC::DrawPolygon( wxList *list, long xoffset, long yoffset, int fillStyle )
	129	{
	130	int n = list->Number();
	131	wxPoint *points = new wxPoint[n];
	132
	133	int i = 0;
	134	for( wxNode *node = list->First(); node; node = node->Next() )
	135	{
	136	wxPoint point = (wxPoint )node->Data();
	137	points[i].x = point->x;
	138	points[i++].y = point->y;
	139	};
	140	DrawPolygon( n, points, xoffset, yoffset, fillStyle );
	141	delete[] points;
	142	};
	143
	144	void wxDC::DrawLines( wxList *list, long xoffset, long yoffset )
	145	{
	146	int n = list->Number();
	147	wxPoint *points = new wxPoint[n];
	148
	149	int i = 0;
	150	for( wxNode *node = list->First(); node; node = node->Next() )
	151	{
	152	wxPoint point = (wxPoint )node->Data();
	153	points[i].x = point->x;
	154	points[i++].y = point->y;
	155	};
	156	DrawLines( n, points, xoffset, yoffset );
	157	delete []points;
	158	};
	159
	160	void wxDC::DrawSpline( long x1, long y1, long x2, long y2, long x3, long y3 )
	161	{
	162	wxList list;
	163	list.Append( (wxObject*)new wxPoint(x1, y1) );
	164	list.Append( (wxObject*)new wxPoint(x2, y2) );
	165	list.Append( (wxObject*)new wxPoint(x3, y3) );
	166	DrawSpline(&list);
	167	wxNode *node = list.First();
	168	while (node)
	169	{
	170	wxPoint p = (wxPoint)node->Data();
	171	delete p;
	172	node = node->Next();
	173	};
	174	};
	175
4bb6408c JS	176	void wxDC::DrawSpline( int n, wxPoint points[] )
	177	{
	178	wxList list;
	179	for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
	180	DrawSpline( &list );
	181	};
	182
	183	void wxDC::SetClippingRegion( long x, long y, long width, long height )
	184	{
	185	m_clipping = TRUE;
	186	m_clipX1 = x;
	187	m_clipY1 = y;
	188	m_clipX2 = x + width;
	189	m_clipY2 = y + height;
	190	};
	191
	192	void wxDC::DestroyClippingRegion(void)
	193	{
	194	m_clipping = FALSE;
	195	};
	196
	197	void wxDC::GetClippingBox( long x, long y, long width, long height ) const
	198	{
	199	if (m_clipping)
	200	{
	201	if (x) *x = m_clipX1;
	202	if (y) *y = m_clipY1;
	203	if (width) *width = (m_clipX2 - m_clipX1);
	204	if (height) *height = (m_clipY2 - m_clipY1);
	205	}
	206	else
	207	x = y = width = height = 0;
	208	};
	209
	210	void wxDC::GetSize( int* width, int* height ) const
	211	{
	212	*width = m_maxX-m_minX;
	213	*height = m_maxY-m_minY;
	214	};
	215
	216	void wxDC::GetSizeMM( long* width, long* height ) const
	217	{
	218	int w = 0;
	219	int h = 0;
	220	GetSize( &w, &h );
	221	width = long( double(w) / (m_scaleXm_mm_to_pix_x) );
	222	height = long( double(h) / (m_scaleYm_mm_to_pix_y) );
	223	};
	224
	225	void wxDC::SetTextForeground( const wxColour &col )
	226	{
	227	if (!Ok()) return;
	228	m_textForegroundColour = col;
	229	};
	230
	231	void wxDC::SetTextBackground( const wxColour &col )
	232	{
	233	if (!Ok()) return;
	234	m_textBackgroundColour = col;
	235	};
	236
	237	void wxDC::SetMapMode( int mode )
	238	{
	239	switch (mode)
240	{
241	case MM_TWIPS:
242	SetLogicalScale( twips2mmm_mm_to_pix_x, twips2mmm_mm_to_pix_y );
243	break;
244	case MM_POINTS:
245	SetLogicalScale( pt2mmm_mm_to_pix_x, pt2mmm_mm_to_pix_y );
246	break;
247	case MM_METRIC:
248	SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
249	break;
250	case MM_LOMETRIC:
251	SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
252	break;
253	default:
254	case MM_TEXT:
255	SetLogicalScale( 1.0, 1.0 );
256	break;
257	};
258	if (mode != MM_TEXT)
259	{
260	m_needComputeScaleX = TRUE;
261	m_needComputeScaleY = TRUE;
262	};
263	};
264
265	void wxDC::SetUserScale( double x, double y )
266	{
267	// allow negative ? -> no
268	m_userScaleX = x;
269	m_userScaleY = y;
270	ComputeScaleAndOrigin();
271	};
272
273	void wxDC::GetUserScale( double x, double y )
274	{
275	if (x) *x = m_userScaleX;
276	if (y) *y = m_userScaleY;
277	};
278
279	void wxDC::SetLogicalScale( double x, double y )
280	{
281	// allow negative ?
282	m_logicalScaleX = x;
283	m_logicalScaleY = y;
284	ComputeScaleAndOrigin();
285	};
286
287	void wxDC::GetLogicalScale( double x, double y )
288	{
289	if (x) *x = m_logicalScaleX;
290	if (y) *y = m_logicalScaleY;
291	};
292
293	void wxDC::SetLogicalOrigin( long x, long y )
294	{
295	m_logicalOriginX = x * m_signX; // is this still correct ?
296	m_logicalOriginY = y * m_signY;
297	ComputeScaleAndOrigin();
298	};
299
300	void wxDC::GetLogicalOrigin( long x, long y )
301	{
302	if (x) *x = m_logicalOriginX;
303	if (y) *y = m_logicalOriginY;
304	};
305
306	void wxDC::SetDeviceOrigin( long x, long y )
307	{
308	m_externalDeviceOriginX = x;
309	m_externalDeviceOriginY = y;
310	ComputeScaleAndOrigin();
311	};
312
313	void wxDC::GetDeviceOrigin( long x, long y )
314	{
315	// if (x) *x = m_externalDeviceOriginX;
316	// if (y) *y = m_externalDeviceOriginY;
317	if (x) *x = m_deviceOriginX;
318	if (y) *y = m_deviceOriginY;
319	};
320
321	void wxDC::SetInternalDeviceOrigin( long x, long y )
322	{
323	m_internalDeviceOriginX = x;
324	m_internalDeviceOriginY = y;
325	ComputeScaleAndOrigin();
326	};
327
328	void wxDC::GetInternalDeviceOrigin( long x, long y )
329	{
330	if (x) *x = m_internalDeviceOriginX;
331	if (y) *y = m_internalDeviceOriginY;
332	};
333
334	void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
335	{
336	m_signX = (xLeftRight ? 1 : -1);
337	m_signY = (yBottomUp ? -1 : 1);
338	ComputeScaleAndOrigin();
339	};
340
341	long wxDC::DeviceToLogicalX(long x) const
342	{
343	return XDEV2LOG(x);
344	};
345
346	long wxDC::DeviceToLogicalY(long y) const
347	{
348	return YDEV2LOG(y);
349	};
350
351	long wxDC::DeviceToLogicalXRel(long x) const
352	{
353	return XDEV2LOGREL(x);
354	};
355
356	long wxDC::DeviceToLogicalYRel(long y) const
357	{
358	return YDEV2LOGREL(y);
359	};
360
361	long wxDC::LogicalToDeviceX(long x) const
362	{
363	return XLOG2DEV(x);
364	};
365
366	long wxDC::LogicalToDeviceY(long y) const
367	{
368	return YLOG2DEV(y);
369	};
370
371	long wxDC::LogicalToDeviceXRel(long x) const
372	{
373	return XLOG2DEVREL(x);
374	};
375
376	long wxDC::LogicalToDeviceYRel(long y) const
377	{
378	return YLOG2DEVREL(y);
379	};
380
381	void wxDC::CalcBoundingBox( long x, long y )
382	{
383	if (x < m_minX) m_minX = x;
384	if (y < m_minY) m_minY = y;
385	if (x > m_maxX) m_maxX = x;
386	if (y > m_maxY) m_maxY = y;
387	};
388
389	void wxDC::ComputeScaleAndOrigin(void)
390	{
391	// CMB: copy scale to see if it changes
392	double origScaleX = m_scaleX;
393	double origScaleY = m_scaleY;
394
395	m_scaleX = m_logicalScaleX * m_userScaleX;
396	m_scaleY = m_logicalScaleY * m_userScaleY;
397
398	m_deviceOriginX = m_internalDeviceOriginX + m_externalDeviceOriginX;
399	m_deviceOriginY = m_internalDeviceOriginY + m_externalDeviceOriginY;
400
401	// CMB: if scale has changed call SetPen to recalulate the line width
402	if (m_scaleX != origScaleX \|\| m_scaleY != origScaleY)
403	{
404	// this is a bit artificial, but we need to force wxDC to think
405	// the pen has changed
c0ed460c	406	wxPen* pen = & GetPen();
4bb6408c JS	407	wxPen tempPen;
4bb6408c JS	408	m_pen = tempPen;
c0ed460c	409	SetPen(* pen);
4bb6408c JS	410	}
	411	};
	412