src/gtk1/dc.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dc.cpp
// Purpose:
// Author:      Robert Roebling
// RCS-ID:      $Id$
// Copyright:   (c) 1998 Robert Roebling, Markus Holzem
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////


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

#include "wx/dc.h"

//-----------------------------------------------------------------------------
// 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
//-----------------------------------------------------------------------------

IMPLEMENT_ABSTRACT_CLASS(wxDC,wxObject)

wxDC::wxDC(void)
{
  m_ok = FALSE;
  m_optimize = FALSE;
  m_autoSetting = 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_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_palette = wxAPP_COLOURMAP;
}

wxDC::~wxDC(void)
{
}

bool wxDC::Ok(void) const
{
  wxASSERT_MSG( m_ok, "invalid display context" );
  return m_ok;
}

void wxDC::DrawArc( long WXUNUSED(x1), long WXUNUSED(y1), long WXUNUSED(x2), long WXUNUSED(y2),
  double WXUNUSED(xc), double WXUNUSED(yc) )
{
}

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

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_deviceOriginX = x;
  m_deviceOriginY = y;
  ComputeScaleAndOrigin();
}

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

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;

  // 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
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dc.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// RCS-ID: $Id$
	6	// Copyright: (c) 1998 Robert Roebling, Markus Holzem
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10
	11	#ifdef __GNUG__
	12	#pragma implementation "dc.h"
	13	#endif
	14
	15	#include "wx/dc.h"
	16
	17	//-----------------------------------------------------------------------------
	18	// constants
	19	//-----------------------------------------------------------------------------
	20
	21	#define mm2inches 0.0393700787402
	22	#define inches2mm 25.4
	23	#define mm2twips 56.6929133859
	24	#define twips2mm 0.0176388888889
	25	#define mm2pt 2.83464566929
	26	#define pt2mm 0.352777777778
	27
	28	//-----------------------------------------------------------------------------
	29	// wxDC
	30	//-----------------------------------------------------------------------------
	31
	32	IMPLEMENT_ABSTRACT_CLASS(wxDC,wxObject)
	33
	34	wxDC::wxDC(void)
	35	{
	36	m_ok = FALSE;
	37	m_optimize = FALSE;
	38	m_autoSetting = FALSE;
	39	m_colour = TRUE;
	40	m_clipping = FALSE;
	41
	42	m_mm_to_pix_x = 1.0;
	43	m_mm_to_pix_y = 1.0;
	44
	45	m_logicalOriginX = 0;
	46	m_logicalOriginY = 0;
	47	m_deviceOriginX = 0;
	48	m_deviceOriginY = 0;
	49
	50	m_logicalScaleX = 1.0;
	51	m_logicalScaleY = 1.0;
	52	m_userScaleX = 1.0;
	53	m_userScaleY = 1.0;
	54	m_scaleX = 1.0;
	55	m_scaleY = 1.0;
	56
	57	m_mappingMode = MM_TEXT;
	58	m_needComputeScaleX = FALSE;
	59	m_needComputeScaleY = FALSE;
	60
	61	m_signX = 1; // default x-axis left to right
	62	m_signY = 1; // default y-axis top down
	63
	64	m_maxX = m_maxY = -100000;
	65	m_minY = m_minY = 100000;
	66
	67	m_logicalFunction = wxCOPY;
	68	// m_textAlignment = wxALIGN_TOP_LEFT;
	69	m_backgroundMode = wxTRANSPARENT;
	70
	71	m_textForegroundColour = *wxBLACK;
	72	m_textBackgroundColour = *wxWHITE;
	73	m_pen = *wxBLACK_PEN;
	74	m_font = *wxNORMAL_FONT;
	75	m_brush = *wxTRANSPARENT_BRUSH;
	76	m_backgroundBrush = *wxWHITE_BRUSH;
	77
	78	// m_palette = wxAPP_COLOURMAP;
	79	}
	80
	81	wxDC::~wxDC(void)
	82	{
	83	}
	84
	85	bool wxDC::Ok(void) const
	86	{
	87	wxASSERT_MSG( m_ok, "invalid display context" );
	88	return m_ok;
	89	}
	90
	91	void wxDC::DrawArc( long WXUNUSED(x1), long WXUNUSED(y1), long WXUNUSED(x2), long WXUNUSED(y2),
	92	double WXUNUSED(xc), double WXUNUSED(yc) )
	93	{
	94	}
	95
	96	void wxDC::DrawIcon( const wxIcon &WXUNUSED(icon), long WXUNUSED(x), long WXUNUSED(y), bool WXUNUSED(useMask) )
	97	{
	98	}
	99
	100	void wxDC::DrawPoint( wxPoint& point )
	101	{
	102	DrawPoint( point.x, point.y );
	103	}
	104
	105	void wxDC::DrawPolygon( wxList *list, long xoffset, long yoffset, int fillStyle )
	106	{
	107	int n = list->Number();
	108	wxPoint *points = new wxPoint[n];
	109
	110	int i = 0;
	111	for( wxNode *node = list->First(); node; node = node->Next() )
	112	{
	113	wxPoint point = (wxPoint )node->Data();
	114	points[i].x = point->x;
	115	points[i++].y = point->y;
	116	}
	117	DrawPolygon( n, points, xoffset, yoffset, fillStyle );
	118	delete[] points;
	119	}
	120
	121	void wxDC::DrawLines( wxList *list, long xoffset, long yoffset )
	122	{
	123	int n = list->Number();
	124	wxPoint *points = new wxPoint[n];
	125
	126	int i = 0;
	127	for( wxNode *node = list->First(); node; node = node->Next() )
	128	{
	129	wxPoint point = (wxPoint )node->Data();
	130	points[i].x = point->x;
	131	points[i++].y = point->y;
	132	}
	133	DrawLines( n, points, xoffset, yoffset );
	134	delete []points;
	135	}
	136
	137	void wxDC::DrawSpline( long x1, long y1, long x2, long y2, long x3, long y3 )
	138	{
	139	wxList list;
	140	list.Append( (wxObject*)new wxPoint(x1, y1) );
	141	list.Append( (wxObject*)new wxPoint(x2, y2) );
	142	list.Append( (wxObject*)new wxPoint(x3, y3) );
	143	DrawSpline(&list);
	144	wxNode *node = list.First();
	145	while (node)
	146	{
	147	wxPoint p = (wxPoint)node->Data();
	148	delete p;
	149	node = node->Next();
	150	}
	151	}
	152
	153	void wxDC::DrawSpline( int n, wxPoint points[] )
	154	{
	155	wxList list;
	156	for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
	157	DrawSpline( &list );
	158	}
	159
	160	void wxDC::SetClippingRegion( long x, long y, long width, long height )
	161	{
	162	m_clipping = TRUE;
	163	m_clipX1 = x;
	164	m_clipY1 = y;
	165	m_clipX2 = x + width;
	166	m_clipY2 = y + height;
	167	}
	168
	169	void wxDC::DestroyClippingRegion(void)
	170	{
	171	m_clipping = FALSE;
	172	}
	173
	174	void wxDC::GetClippingBox( long x, long y, long width, long height ) const
	175	{
	176	if (m_clipping)
	177	{
	178	if (x) *x = m_clipX1;
	179	if (y) *y = m_clipY1;
	180	if (width) *width = (m_clipX2 - m_clipX1);
	181	if (height) *height = (m_clipY2 - m_clipY1);
	182	}
	183	else
	184	x = y = width = height = 0;
	185	}
	186
	187	void wxDC::GetSize( int* width, int* height ) const
	188	{
	189	*width = m_maxX-m_minX;
	190	*height = m_maxY-m_minY;
	191	}
	192
	193	void wxDC::GetSizeMM( long* width, long* height ) const
	194	{
	195	int w = 0;
	196	int h = 0;
	197	GetSize( &w, &h );
	198	width = long( double(w) / (m_scaleXm_mm_to_pix_x) );
	199	height = long( double(h) / (m_scaleYm_mm_to_pix_y) );
	200	}
	201
	202	void wxDC::SetTextForeground( const wxColour &col )
	203	{
	204	if (!Ok()) return;
	205	m_textForegroundColour = col;
	206	}
	207
	208	void wxDC::SetTextBackground( const wxColour &col )
	209	{
	210	if (!Ok()) return;
	211	m_textBackgroundColour = col;
	212	}
	213
	214	void wxDC::SetMapMode( int mode )
	215	{
	216	switch (mode)
	217	{
	218	case MM_TWIPS:
	219	SetLogicalScale( twips2mmm_mm_to_pix_x, twips2mmm_mm_to_pix_y );
	220	break;
	221	case MM_POINTS:
	222	SetLogicalScale( pt2mmm_mm_to_pix_x, pt2mmm_mm_to_pix_y );
	223	break;
	224	case MM_METRIC:
	225	SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
	226	break;
	227	case MM_LOMETRIC:
	228	SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
	229	break;
	230	default:
	231	case MM_TEXT:
	232	SetLogicalScale( 1.0, 1.0 );
	233	break;
	234	}
	235	if (mode != MM_TEXT)
	236	{
	237	m_needComputeScaleX = TRUE;
	238	m_needComputeScaleY = TRUE;
	239	}
	240	}
	241
	242	void wxDC::SetUserScale( double x, double y )
	243	{
	244	// allow negative ? -> no
	245	m_userScaleX = x;
	246	m_userScaleY = y;
	247	ComputeScaleAndOrigin();
	248	}
	249
	250	void wxDC::GetUserScale( double x, double y )
	251	{
	252	if (x) *x = m_userScaleX;
	253	if (y) *y = m_userScaleY;
	254	}
	255
	256	void wxDC::SetLogicalScale( double x, double y )
	257	{
	258	// allow negative ?
	259	m_logicalScaleX = x;
	260	m_logicalScaleY = y;
	261	ComputeScaleAndOrigin();
	262	}
	263
	264	void wxDC::GetLogicalScale( double x, double y )
	265	{
	266	if (x) *x = m_logicalScaleX;
	267	if (y) *y = m_logicalScaleY;
	268	}
	269
	270	void wxDC::SetLogicalOrigin( long x, long y )
	271	{
	272	m_logicalOriginX = x * m_signX; // is this still correct ?
	273	m_logicalOriginY = y * m_signY;
	274	ComputeScaleAndOrigin();
	275	}
	276
	277	void wxDC::GetLogicalOrigin( long x, long y )
	278	{
	279	if (x) *x = m_logicalOriginX;
	280	if (y) *y = m_logicalOriginY;
	281	}
	282
	283	void wxDC::SetDeviceOrigin( long x, long y )
	284	{
	285	m_deviceOriginX = x;
	286	m_deviceOriginY = y;
	287	ComputeScaleAndOrigin();
	288	}
	289
	290	void wxDC::GetDeviceOrigin( long x, long y )
	291	{
	292	if (x) *x = m_deviceOriginX;
	293	if (y) *y = m_deviceOriginY;
	294	}
	295
	296	void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
	297	{
	298	m_signX = (xLeftRight ? 1 : -1);
	299	m_signY = (yBottomUp ? -1 : 1);
	300	ComputeScaleAndOrigin();
	301	}
	302
	303	long wxDC::DeviceToLogicalX(long x) const
	304	{
	305	return XDEV2LOG(x);
	306	}
	307
	308	long wxDC::DeviceToLogicalY(long y) const
	309	{
	310	return YDEV2LOG(y);
	311	}
	312
	313	long wxDC::DeviceToLogicalXRel(long x) const
	314	{
	315	return XDEV2LOGREL(x);
	316	}
	317
	318	long wxDC::DeviceToLogicalYRel(long y) const
	319	{
	320	return YDEV2LOGREL(y);
	321	}
	322
	323	long wxDC::LogicalToDeviceX(long x) const
	324	{
	325	return XLOG2DEV(x);
	326	}
	327
	328	long wxDC::LogicalToDeviceY(long y) const
	329	{
	330	return YLOG2DEV(y);
	331	}
	332
	333	long wxDC::LogicalToDeviceXRel(long x) const
	334	{
	335	return XLOG2DEVREL(x);
	336	}
	337
	338	long wxDC::LogicalToDeviceYRel(long y) const
	339	{
	340	return YLOG2DEVREL(y);
	341	}
	342
	343	void wxDC::CalcBoundingBox( long x, long y )
	344	{
	345	if (x < m_minX) m_minX = x;
	346	if (y < m_minY) m_minY = y;
	347	if (x > m_maxX) m_maxX = x;
	348	if (y > m_maxY) m_maxY = y;
	349	}
	350
	351	void wxDC::ComputeScaleAndOrigin(void)
	352	{
	353	// CMB: copy scale to see if it changes
	354	double origScaleX = m_scaleX;
	355	double origScaleY = m_scaleY;
	356
	357	m_scaleX = m_logicalScaleX * m_userScaleX;
	358	m_scaleY = m_logicalScaleY * m_userScaleY;
	359
	360	// CMB: if scale has changed call SetPen to recalulate the line width
	361	if (m_scaleX != origScaleX \|\| m_scaleY != origScaleY)
	362	{
	363	// this is a bit artificial, but we need to force wxDC to think
	364	// the pen has changed
	365	wxPen* pen = GetPen();
	366	wxPen tempPen;
	367	m_pen = tempPen;
	368	SetPen(pen);
	369	}
	370	}
	371