[wxWidgets.git] / 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_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_palette = wxAPP_COLOURMAP;
};

wxDC::~wxDC(void)
{
};

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_externalDeviceOriginX = x;
  m_externalDeviceOriginY = y;
  ComputeScaleAndOrigin();
};

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

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
c801d85f KB	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dc.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Created: 01/02/97
6f65e337	6	// RCS-ID: $Id$
c801d85f KB	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	m_internalDeviceOriginX = 0;
	51	m_internalDeviceOriginY = 0;
	52	m_externalDeviceOriginX = 0;
	53	m_externalDeviceOriginY = 0;
	54
	55	m_logicalScaleX = 1.0;
	56	m_logicalScaleY = 1.0;
	57	m_userScaleX = 1.0;
	58	m_userScaleY = 1.0;
	59	m_scaleX = 1.0;
	60	m_scaleY = 1.0;
	61
	62	m_mappingMode = MM_TEXT;
	63	m_needComputeScaleX = FALSE;
	64	m_needComputeScaleY = FALSE;
	65
	66	m_signX = 1; // default x-axis left to right
	67	m_signY = 1; // default y-axis top down
	68
	69	m_maxX = m_maxY = -100000;
	70	m_minY = m_minY = 100000;
71
72	m_logicalFunction = wxCOPY;
73	// m_textAlignment = wxALIGN_TOP_LEFT;
74	m_backgroundMode = wxTRANSPARENT;
75
76	m_textForegroundColour = *wxBLACK;
77	m_textBackgroundColour = *wxWHITE;
78	m_pen = *wxBLACK_PEN;
79	m_font = *wxNORMAL_FONT;
80	m_brush = *wxTRANSPARENT_BRUSH;
81	m_backgroundBrush = *wxWHITE_BRUSH;
82
83	// m_palette = wxAPP_COLOURMAP;
84	};
85
86	wxDC::~wxDC(void)
87	{
88	};
89
90	void wxDC::DrawArc( long WXUNUSED(x1), long WXUNUSED(y1), long WXUNUSED(x2), long WXUNUSED(y2),
91	double WXUNUSED(xc), double WXUNUSED(yc) )
92	{
93	};
94
95	void wxDC::DrawIcon( const wxIcon &WXUNUSED(icon), long WXUNUSED(x), long WXUNUSED(y), bool WXUNUSED(useMask) )
96	{
97	};
98
99	void wxDC::DrawPoint( wxPoint& point )
100	{
101	DrawPoint( point.x, point.y );
102	};
103
104	void wxDC::DrawPolygon( wxList *list, long xoffset, long yoffset, int fillStyle )
105	{
106	int n = list->Number();
107	wxPoint *points = new wxPoint[n];
108
109	int i = 0;
110	for( wxNode *node = list->First(); node; node = node->Next() )
111	{
112	wxPoint point = (wxPoint )node->Data();
113	points[i].x = point->x;
114	points[i++].y = point->y;
115	};
116	DrawPolygon( n, points, xoffset, yoffset, fillStyle );
117	delete[] points;
118	};
119
120	void wxDC::DrawLines( wxList *list, long xoffset, long yoffset )
121	{
122	int n = list->Number();
123	wxPoint *points = new wxPoint[n];
124
125	int i = 0;
126	for( wxNode *node = list->First(); node; node = node->Next() )
127	{
128	wxPoint point = (wxPoint )node->Data();
129	points[i].x = point->x;
130	points[i++].y = point->y;
131	};
132	DrawLines( n, points, xoffset, yoffset );
133	delete []points;
134	};
135
136	void wxDC::DrawSpline( long x1, long y1, long x2, long y2, long x3, long y3 )
137	{
138	wxList list;
c0392997 RR	139	list.Append( (wxObject*)new wxPoint(x1, y1) );
	140	list.Append( (wxObject*)new wxPoint(x2, y2) );
	141	list.Append( (wxObject*)new wxPoint(x3, y3) );
c801d85f	142	DrawSpline(&list);
33d0b396 RR	143	wxNode *node = list.First();
	144	while (node)
	145	{
	146	wxPoint p = (wxPoint)node->Data();
	147	delete p;
	148	node = node->Next();
	149	};
c801d85f KB	150	};
	151
	152	void wxDC::DrawSpline( wxList *points )
	153	{
	154	DrawOpenSpline( points );
	155	};
	156
	157	void wxDC::DrawSpline( int n, wxPoint points[] )
	158	{
	159	wxList list;
	160	for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
	161	DrawSpline( &list );
	162	};
	163
	164	void wxDC::SetClippingRegion( long x, long y, long width, long height )
	165	{
	166	m_clipping = TRUE;
	167	m_clipX1 = x;
	168	m_clipY1 = y;
	169	m_clipX2 = x + width;
	170	m_clipY2 = y + height;
	171	};
	172
	173	void wxDC::DestroyClippingRegion(void)
	174	{
	175	m_clipping = FALSE;
	176	};
	177
	178	void wxDC::GetClippingBox( long x, long y, long width, long height ) const
	179	{
	180	if (m_clipping)
	181	{
	182	if (x) *x = m_clipX1;
	183	if (y) *y = m_clipY1;
	184	if (width) *width = (m_clipX2 - m_clipX1);
	185	if (height) *height = (m_clipY2 - m_clipY1);
	186	}
	187	else
	188	x = y = width = height = 0;
	189	};
	190
	191	void wxDC::GetSize( int* width, int* height ) const
	192	{
	193	*width = m_maxX-m_minX;
	194	*height = m_maxY-m_minY;
	195	};
	196
	197	void wxDC::GetSizeMM( long* width, long* height ) const
	198	{
	199	int w = 0;
	200	int h = 0;
	201	GetSize( &w, &h );
	202	width = long( double(w) / (m_scaleXm_mm_to_pix_x) );
	203	height = long( double(h) / (m_scaleYm_mm_to_pix_y) );
	204	};
	205
	206	void wxDC::SetTextForeground( const wxColour &col )
	207	{
	208	if (!Ok()) return;
	209	m_textForegroundColour = col;
	210	};
	211
	212	void wxDC::SetTextBackground( const wxColour &col )
	213	{
214	if (!Ok()) return;
215	m_textBackgroundColour = col;
216	};
217
218	void wxDC::SetMapMode( int mode )
219	{
220	switch (mode)
221	{
222	case MM_TWIPS:
223	SetLogicalScale( twips2mmm_mm_to_pix_x, twips2mmm_mm_to_pix_y );
224	break;
225	case MM_POINTS:
226	SetLogicalScale( pt2mmm_mm_to_pix_x, pt2mmm_mm_to_pix_y );
227	break;
228	case MM_METRIC:
229	SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
230	break;
231	case MM_LOMETRIC:
232	SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
233	break;
234	default:
235	case MM_TEXT:
236	SetLogicalScale( 1.0, 1.0 );
237	break;
238	};
239	if (mode != MM_TEXT)
240	{
241	m_needComputeScaleX = TRUE;
242	m_needComputeScaleY = TRUE;
243	};
244	};
245
246	void wxDC::SetUserScale( double x, double y )
247	{
248	// allow negative ? -> no
249	m_userScaleX = x;
250	m_userScaleY = y;
251	ComputeScaleAndOrigin();
252	};
253
254	void wxDC::GetUserScale( double x, double y )
255	{
256	if (x) *x = m_userScaleX;
257	if (y) *y = m_userScaleY;
258	};
259
260	void wxDC::SetLogicalScale( double x, double y )
261	{
262	// allow negative ?
263	m_logicalScaleX = x;
264	m_logicalScaleY = y;
265	ComputeScaleAndOrigin();
266	};
267
268	void wxDC::GetLogicalScale( double x, double y )
269	{
270	if (x) *x = m_logicalScaleX;
271	if (y) *y = m_logicalScaleY;
272	};
273
274	void wxDC::SetLogicalOrigin( long x, long y )
275	{
276	m_logicalOriginX = x * m_signX; // is this still correct ?
277	m_logicalOriginY = y * m_signY;
278	ComputeScaleAndOrigin();
279	};
280
281	void wxDC::GetLogicalOrigin( long x, long y )
282	{
283	if (x) *x = m_logicalOriginX;
284	if (y) *y = m_logicalOriginY;
285	};
286
287	void wxDC::SetDeviceOrigin( long x, long y )
288	{
289	m_externalDeviceOriginX = x;
290	m_externalDeviceOriginY = y;
291	ComputeScaleAndOrigin();
292	};
293
294	void wxDC::GetDeviceOrigin( long x, long y )
295	{
296	if (x) *x = m_externalDeviceOriginX;
297	if (y) *y = m_externalDeviceOriginY;
298	};
299
300	void wxDC::SetInternalDeviceOrigin( long x, long y )
301	{
302	m_internalDeviceOriginX = x;
303	m_internalDeviceOriginY = y;
304	ComputeScaleAndOrigin();
305	};
306
307	void wxDC::GetInternalDeviceOrigin( long x, long y )
308	{
309	if (x) *x = m_internalDeviceOriginX;
310	if (y) *y = m_internalDeviceOriginY;
311	};
312
313	void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
314	{
315	m_signX = (xLeftRight ? 1 : -1);
316	m_signY = (yBottomUp ? -1 : 1);
317	ComputeScaleAndOrigin();
318	};
319
320	long wxDC::DeviceToLogicalX(long x) const
321	{
322	return XDEV2LOG(x);
323	};
324
325	long wxDC::DeviceToLogicalY(long y) const
326	{
327	return YDEV2LOG(y);
328	};
329
330	long wxDC::DeviceToLogicalXRel(long x) const
331	{
332	return XDEV2LOGREL(x);
333	};
334
335	long wxDC::DeviceToLogicalYRel(long y) const
336	{
337	return YDEV2LOGREL(y);
338	};
339
340	long wxDC::LogicalToDeviceX(long x) const
341	{
342	return XLOG2DEV(x);
343	};
344
345	long wxDC::LogicalToDeviceY(long y) const
346	{
347	return YLOG2DEV(y);
348	};
349
350	long wxDC::LogicalToDeviceXRel(long x) const
351	{
352	return XLOG2DEVREL(x);
353	};
354
355	long wxDC::LogicalToDeviceYRel(long y) const
356	{
357	return YLOG2DEVREL(y);
358	};
359
360	void wxDC::CalcBoundingBox( long x, long y )
361	{
362	if (x < m_minX) m_minX = x;
363	if (y < m_minY) m_minY = y;
364	if (x > m_maxX) m_maxX = x;
365	if (y > m_maxY) m_maxY = y;
366	};
367
368	void wxDC::ComputeScaleAndOrigin(void)
369	{
6f65e337 JS	370	// CMB: copy scale to see if it changes
	371	double origScaleX = m_scaleX;
	372	double origScaleY = m_scaleY;
	373
c801d85f KB	374	m_scaleX = m_logicalScaleX * m_userScaleX;
	375	m_scaleY = m_logicalScaleY * m_userScaleY;
	376
	377	m_deviceOriginX = m_internalDeviceOriginX + m_externalDeviceOriginX;
	378	m_deviceOriginY = m_internalDeviceOriginY + m_externalDeviceOriginY;
6f65e337 JS	379
	380	// CMB: if scale has changed call SetPen to recalulate the line width
	381	if (m_scaleX != origScaleX \|\| m_scaleY != origScaleY)
	382	{
	383	// this is a bit artificial, but we need to force wxDC to think
	384	// the pen has changed
	385	wxPen* pen = GetPen();
	386	wxPen tempPen;
	387	m_pen = tempPen;
	388	SetPen(pen);
	389	}
c801d85f KB	390	};
c801d85f KB	391