src/gtk1/dc.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dc.cpp
// Purpose:
// Author:      Robert Roebling
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) 1998 Robert Roebling, Julian Smart and 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( wxList *points )
{
  DrawOpenSpline( points );
}

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	// Created: 01/02/97
	6	// RCS-ID: $Id$
	7	// Copyright: (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
	8	// Licence: wxWindows licence
	9	/////////////////////////////////////////////////////////////////////////////
	10
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "dc.h"
	14	#endif
	15
	16	#include "wx/dc.h"
	17
	18	//-----------------------------------------------------------------------------
	19	// constants
	20	//-----------------------------------------------------------------------------
	21
	22	#define mm2inches 0.0393700787402
	23	#define inches2mm 25.4
	24	#define mm2twips 56.6929133859
	25	#define twips2mm 0.0176388888889
	26	#define mm2pt 2.83464566929
	27	#define pt2mm 0.352777777778
	28
	29	//-----------------------------------------------------------------------------
	30	// wxDC
	31	//-----------------------------------------------------------------------------
	32
	33	IMPLEMENT_ABSTRACT_CLASS(wxDC,wxObject)
	34
	35	wxDC::wxDC(void)
	36	{
	37	m_ok = FALSE;
	38	m_optimize = FALSE;
	39	m_autoSetting = FALSE;
	40	m_colour = TRUE;
	41	m_clipping = FALSE;
	42
	43	m_mm_to_pix_x = 1.0;
	44	m_mm_to_pix_y = 1.0;
	45
	46	m_logicalOriginX = 0;
	47	m_logicalOriginY = 0;
	48	m_deviceOriginX = 0;
	49	m_deviceOriginY = 0;
	50
	51	m_logicalScaleX = 1.0;
	52	m_logicalScaleY = 1.0;
	53	m_userScaleX = 1.0;
	54	m_userScaleY = 1.0;
	55	m_scaleX = 1.0;
	56	m_scaleY = 1.0;
	57
	58	m_mappingMode = MM_TEXT;
	59	m_needComputeScaleX = FALSE;
	60	m_needComputeScaleY = FALSE;
	61
	62	m_signX = 1; // default x-axis left to right
	63	m_signY = 1; // default y-axis top down
	64
	65	m_maxX = m_maxY = -100000;
	66	m_minY = m_minY = 100000;
	67
	68	m_logicalFunction = wxCOPY;
	69	// m_textAlignment = wxALIGN_TOP_LEFT;
	70	m_backgroundMode = wxTRANSPARENT;
	71
	72	m_textForegroundColour = *wxBLACK;
	73	m_textBackgroundColour = *wxWHITE;
	74	m_pen = *wxBLACK_PEN;
	75	m_font = *wxNORMAL_FONT;
	76	m_brush = *wxTRANSPARENT_BRUSH;
	77	m_backgroundBrush = *wxWHITE_BRUSH;
	78
	79	// m_palette = wxAPP_COLOURMAP;
	80	}
	81
	82	wxDC::~wxDC(void)
	83	{
	84	}
	85
	86	bool wxDC::Ok(void) const
	87	{
	88	wxASSERT_MSG( m_ok, "invalid display context" );
	89	return m_ok;
	90	}
	91
	92	void wxDC::DrawArc( long WXUNUSED(x1), long WXUNUSED(y1), long WXUNUSED(x2), long WXUNUSED(y2),
	93	double WXUNUSED(xc), double WXUNUSED(yc) )
	94	{
	95	}
	96
	97	void wxDC::DrawIcon( const wxIcon &WXUNUSED(icon), long WXUNUSED(x), long WXUNUSED(y), bool WXUNUSED(useMask) )
	98	{
	99	}
	100
	101	void wxDC::DrawPoint( wxPoint& point )
	102	{
	103	DrawPoint( point.x, point.y );
	104	}
	105
	106	void wxDC::DrawPolygon( wxList *list, long xoffset, long yoffset, int fillStyle )
	107	{
	108	int n = list->Number();
	109	wxPoint *points = new wxPoint[n];
	110
	111	int i = 0;
	112	for( wxNode *node = list->First(); node; node = node->Next() )
	113	{
	114	wxPoint point = (wxPoint )node->Data();
	115	points[i].x = point->x;
	116	points[i++].y = point->y;
	117	}
	118	DrawPolygon( n, points, xoffset, yoffset, fillStyle );
	119	delete[] points;
	120	}
	121
	122	void wxDC::DrawLines( wxList *list, long xoffset, long yoffset )
	123	{
	124	int n = list->Number();
	125	wxPoint *points = new wxPoint[n];
	126
	127	int i = 0;
	128	for( wxNode *node = list->First(); node; node = node->Next() )
	129	{
	130	wxPoint point = (wxPoint )node->Data();
	131	points[i].x = point->x;
	132	points[i++].y = point->y;
	133	}
	134	DrawLines( n, points, xoffset, yoffset );
	135	delete []points;
	136	}
	137
	138	void wxDC::DrawSpline( long x1, long y1, long x2, long y2, long x3, long y3 )
	139	{
	140	wxList list;
	141	list.Append( (wxObject*)new wxPoint(x1, y1) );
	142	list.Append( (wxObject*)new wxPoint(x2, y2) );
	143	list.Append( (wxObject*)new wxPoint(x3, y3) );
	144	DrawSpline(&list);
	145	wxNode *node = list.First();
	146	while (node)
	147	{
	148	wxPoint p = (wxPoint)node->Data();
	149	delete p;
	150	node = node->Next();
	151	}
	152	}
	153
	154	void wxDC::DrawSpline( wxList *points )
	155	{
	156	DrawOpenSpline( points );
	157	}
	158
	159	void wxDC::DrawSpline( int n, wxPoint points[] )
	160	{
	161	wxList list;
	162	for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
	163	DrawSpline( &list );
	164	}
	165
	166	void wxDC::SetClippingRegion( long x, long y, long width, long height )
	167	{
	168	m_clipping = TRUE;
	169	m_clipX1 = x;
	170	m_clipY1 = y;
	171	m_clipX2 = x + width;
	172	m_clipY2 = y + height;
	173	}
	174
	175	void wxDC::DestroyClippingRegion(void)
	176	{
	177	m_clipping = FALSE;
	178	}
	179
	180	void wxDC::GetClippingBox( long x, long y, long width, long height ) const
	181	{
	182	if (m_clipping)
	183	{
	184	if (x) *x = m_clipX1;
	185	if (y) *y = m_clipY1;
	186	if (width) *width = (m_clipX2 - m_clipX1);
	187	if (height) *height = (m_clipY2 - m_clipY1);
	188	}
	189	else
	190	x = y = width = height = 0;
	191	}
	192
	193	void wxDC::GetSize( int* width, int* height ) const
	194	{
	195	*width = m_maxX-m_minX;
	196	*height = m_maxY-m_minY;
	197	}
	198
	199	void wxDC::GetSizeMM( long* width, long* height ) const
	200	{
	201	int w = 0;
	202	int h = 0;
	203	GetSize( &w, &h );
	204	width = long( double(w) / (m_scaleXm_mm_to_pix_x) );
	205	height = long( double(h) / (m_scaleYm_mm_to_pix_y) );
	206	}
	207
	208	void wxDC::SetTextForeground( const wxColour &col )
	209	{
	210	if (!Ok()) return;
	211	m_textForegroundColour = col;
	212	}
	213
	214	void wxDC::SetTextBackground( const wxColour &col )
	215	{
	216	if (!Ok()) return;
	217	m_textBackgroundColour = col;
	218	}
	219
	220	void wxDC::SetMapMode( int mode )
	221	{
	222	switch (mode)
	223	{
	224	case MM_TWIPS:
	225	SetLogicalScale( twips2mmm_mm_to_pix_x, twips2mmm_mm_to_pix_y );
	226	break;
	227	case MM_POINTS:
	228	SetLogicalScale( pt2mmm_mm_to_pix_x, pt2mmm_mm_to_pix_y );
	229	break;
	230	case MM_METRIC:
	231	SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
	232	break;
	233	case MM_LOMETRIC:
	234	SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
	235	break;
	236	default:
	237	case MM_TEXT:
	238	SetLogicalScale( 1.0, 1.0 );
	239	break;
	240	}
	241	if (mode != MM_TEXT)
	242	{
	243	m_needComputeScaleX = TRUE;
	244	m_needComputeScaleY = TRUE;
	245	}
	246	}
	247
	248	void wxDC::SetUserScale( double x, double y )
	249	{
	250	// allow negative ? -> no
	251	m_userScaleX = x;
	252	m_userScaleY = y;
	253	ComputeScaleAndOrigin();
	254	}
	255
	256	void wxDC::GetUserScale( double x, double y )
	257	{
	258	if (x) *x = m_userScaleX;
	259	if (y) *y = m_userScaleY;
	260	}
	261
	262	void wxDC::SetLogicalScale( double x, double y )
	263	{
	264	// allow negative ?
	265	m_logicalScaleX = x;
	266	m_logicalScaleY = y;
	267	ComputeScaleAndOrigin();
	268	}
	269
	270	void wxDC::GetLogicalScale( double x, double y )
	271	{
	272	if (x) *x = m_logicalScaleX;
	273	if (y) *y = m_logicalScaleY;
	274	}
	275
	276	void wxDC::SetLogicalOrigin( long x, long y )
	277	{
	278	m_logicalOriginX = x * m_signX; // is this still correct ?
	279	m_logicalOriginY = y * m_signY;
	280	ComputeScaleAndOrigin();
	281	}
	282
	283	void wxDC::GetLogicalOrigin( long x, long y )
	284	{
	285	if (x) *x = m_logicalOriginX;
	286	if (y) *y = m_logicalOriginY;
	287	}
	288
	289	void wxDC::SetDeviceOrigin( long x, long y )
	290	{
	291	m_deviceOriginX = x;
	292	m_deviceOriginY = y;
	293	ComputeScaleAndOrigin();
	294	}
	295
	296	void wxDC::GetDeviceOrigin( long x, long y )
	297	{
	298	if (x) *x = m_deviceOriginX;
	299	if (y) *y = m_deviceOriginY;
	300	}
	301
	302	void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
	303	{
	304	m_signX = (xLeftRight ? 1 : -1);
	305	m_signY = (yBottomUp ? -1 : 1);
	306	ComputeScaleAndOrigin();
	307	}
	308
	309	long wxDC::DeviceToLogicalX(long x) const
	310	{
	311	return XDEV2LOG(x);
	312	}
	313
	314	long wxDC::DeviceToLogicalY(long y) const
	315	{
	316	return YDEV2LOG(y);
	317	}
	318
	319	long wxDC::DeviceToLogicalXRel(long x) const
	320	{
	321	return XDEV2LOGREL(x);
	322	}
	323
	324	long wxDC::DeviceToLogicalYRel(long y) const
	325	{
	326	return YDEV2LOGREL(y);
	327	}
	328
	329	long wxDC::LogicalToDeviceX(long x) const
	330	{
	331	return XLOG2DEV(x);
	332	}
	333
	334	long wxDC::LogicalToDeviceY(long y) const
	335	{
	336	return YLOG2DEV(y);
	337	}
	338
	339	long wxDC::LogicalToDeviceXRel(long x) const
	340	{
	341	return XLOG2DEVREL(x);
	342	}
	343
	344	long wxDC::LogicalToDeviceYRel(long y) const
	345	{
	346	return YLOG2DEVREL(y);
	347	}
	348
	349	void wxDC::CalcBoundingBox( long x, long y )
	350	{
	351	if (x < m_minX) m_minX = x;
	352	if (y < m_minY) m_minY = y;
	353	if (x > m_maxX) m_maxX = x;
	354	if (y > m_maxY) m_maxY = y;
	355	}
	356
	357	void wxDC::ComputeScaleAndOrigin(void)
	358	{
	359	// CMB: copy scale to see if it changes
	360	double origScaleX = m_scaleX;
	361	double origScaleY = m_scaleY;
	362
	363	m_scaleX = m_logicalScaleX * m_userScaleX;
	364	m_scaleY = m_logicalScaleY * m_userScaleY;
	365
	366	// CMB: if scale has changed call SetPen to recalulate the line width
	367	if (m_scaleX != origScaleX \|\| m_scaleY != origScaleY)
	368	{
	369	// this is a bit artificial, but we need to force wxDC to think
	370	// the pen has changed
	371	wxPen* pen = GetPen();
	372	wxPen tempPen;
	373	m_pen = tempPen;
	374	SetPen(pen);
	375	}
	376	}
	377