[wxWidgets.git] / src / gtk / 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.DeleteContents(TRUE);
  list.Append( (wxObject*)new wxPoint(x1, y1) );
  list.Append( (wxObject*)new wxPoint(x2, y2) );
  list.Append( (wxObject*)new wxPoint(x3, y3) );
  DrawSpline(&list);
};

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;
139	list.DeleteContents(TRUE);
c0392997 RR	140	list.Append( (wxObject*)new wxPoint(x1, y1) );
	141	list.Append( (wxObject*)new wxPoint(x2, y2) );
	142	list.Append( (wxObject*)new wxPoint(x3, y3) );
c801d85f KB	143	DrawSpline(&list);
	144	};
	145
	146	void wxDC::DrawSpline( wxList *points )
	147	{
	148	DrawOpenSpline( points );
	149	};
	150
	151	void wxDC::DrawSpline( int n, wxPoint points[] )
	152	{
	153	wxList list;
	154	for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
	155	DrawSpline( &list );
	156	};
	157
	158	void wxDC::SetClippingRegion( long x, long y, long width, long height )
	159	{
	160	m_clipping = TRUE;
	161	m_clipX1 = x;
	162	m_clipY1 = y;
	163	m_clipX2 = x + width;
	164	m_clipY2 = y + height;
	165	};
	166
	167	void wxDC::DestroyClippingRegion(void)
	168	{
	169	m_clipping = FALSE;
	170	};
	171
	172	void wxDC::GetClippingBox( long x, long y, long width, long height ) const
	173	{
	174	if (m_clipping)
	175	{
	176	if (x) *x = m_clipX1;
	177	if (y) *y = m_clipY1;
	178	if (width) *width = (m_clipX2 - m_clipX1);
	179	if (height) *height = (m_clipY2 - m_clipY1);
	180	}
	181	else
	182	x = y = width = height = 0;
	183	};
	184
	185	void wxDC::GetSize( int* width, int* height ) const
	186	{
	187	*width = m_maxX-m_minX;
	188	*height = m_maxY-m_minY;
	189	};
	190
	191	void wxDC::GetSizeMM( long* width, long* height ) const
	192	{
	193	int w = 0;
	194	int h = 0;
	195	GetSize( &w, &h );
	196	width = long( double(w) / (m_scaleXm_mm_to_pix_x) );
	197	height = long( double(h) / (m_scaleYm_mm_to_pix_y) );
	198	};
	199
	200	void wxDC::SetTextForeground( const wxColour &col )
	201	{
	202	if (!Ok()) return;
	203	m_textForegroundColour = col;
	204	};
	205
	206	void wxDC::SetTextBackground( const wxColour &col )
207	{
208	if (!Ok()) return;
209	m_textBackgroundColour = col;
210	};
211
212	void wxDC::SetMapMode( int mode )
213	{
214	switch (mode)
215	{
216	case MM_TWIPS:
217	SetLogicalScale( twips2mmm_mm_to_pix_x, twips2mmm_mm_to_pix_y );
218	break;
219	case MM_POINTS:
220	SetLogicalScale( pt2mmm_mm_to_pix_x, pt2mmm_mm_to_pix_y );
221	break;
222	case MM_METRIC:
223	SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
224	break;
225	case MM_LOMETRIC:
226	SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
227	break;
228	default:
229	case MM_TEXT:
230	SetLogicalScale( 1.0, 1.0 );
231	break;
232	};
233	if (mode != MM_TEXT)
234	{
235	m_needComputeScaleX = TRUE;
236	m_needComputeScaleY = TRUE;
237	};
238	};
239
240	void wxDC::SetUserScale( double x, double y )
241	{
242	// allow negative ? -> no
243	m_userScaleX = x;
244	m_userScaleY = y;
245	ComputeScaleAndOrigin();
246	};
247
248	void wxDC::GetUserScale( double x, double y )
249	{
250	if (x) *x = m_userScaleX;
251	if (y) *y = m_userScaleY;
252	};
253
254	void wxDC::SetLogicalScale( double x, double y )
255	{
256	// allow negative ?
257	m_logicalScaleX = x;
258	m_logicalScaleY = y;
259	ComputeScaleAndOrigin();
260	};
261
262	void wxDC::GetLogicalScale( double x, double y )
263	{
264	if (x) *x = m_logicalScaleX;
265	if (y) *y = m_logicalScaleY;
266	};
267
268	void wxDC::SetLogicalOrigin( long x, long y )
269	{
270	m_logicalOriginX = x * m_signX; // is this still correct ?
271	m_logicalOriginY = y * m_signY;
272	ComputeScaleAndOrigin();
273	};
274
275	void wxDC::GetLogicalOrigin( long x, long y )
276	{
277	if (x) *x = m_logicalOriginX;
278	if (y) *y = m_logicalOriginY;
279	};
280
281	void wxDC::SetDeviceOrigin( long x, long y )
282	{
283	m_externalDeviceOriginX = x;
284	m_externalDeviceOriginY = y;
285	ComputeScaleAndOrigin();
286	};
287
288	void wxDC::GetDeviceOrigin( long x, long y )
289	{
290	if (x) *x = m_externalDeviceOriginX;
291	if (y) *y = m_externalDeviceOriginY;
292	};
293
294	void wxDC::SetInternalDeviceOrigin( long x, long y )
295	{
296	m_internalDeviceOriginX = x;
297	m_internalDeviceOriginY = y;
298	ComputeScaleAndOrigin();
299	};
300
301	void wxDC::GetInternalDeviceOrigin( long x, long y )
302	{
303	if (x) *x = m_internalDeviceOriginX;
304	if (y) *y = m_internalDeviceOriginY;
305	};
306
307	void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
308	{
309	m_signX = (xLeftRight ? 1 : -1);
310	m_signY = (yBottomUp ? -1 : 1);
311	ComputeScaleAndOrigin();
312	};
313
314	long wxDC::DeviceToLogicalX(long x) const
315	{
316	return XDEV2LOG(x);
317	};
318
319	long wxDC::DeviceToLogicalY(long y) const
320	{
321	return YDEV2LOG(y);
322	};
323
324	long wxDC::DeviceToLogicalXRel(long x) const
325	{
326	return XDEV2LOGREL(x);
327	};
328
329	long wxDC::DeviceToLogicalYRel(long y) const
330	{
331	return YDEV2LOGREL(y);
332	};
333
334	long wxDC::LogicalToDeviceX(long x) const
335	{
336	return XLOG2DEV(x);
337	};
338
339	long wxDC::LogicalToDeviceY(long y) const
340	{
341	return YLOG2DEV(y);
342	};
343
344	long wxDC::LogicalToDeviceXRel(long x) const
345	{
346	return XLOG2DEVREL(x);
347	};
348
349	long wxDC::LogicalToDeviceYRel(long y) const
350	{
351	return YLOG2DEVREL(y);
352	};
353
354	void wxDC::CalcBoundingBox( long x, long y )
355	{
356	if (x < m_minX) m_minX = x;
357	if (y < m_minY) m_minY = y;
358	if (x > m_maxX) m_maxX = x;
359	if (y > m_maxY) m_maxY = y;
360	};
361
362	void wxDC::ComputeScaleAndOrigin(void)
363	{
6f65e337 JS	364	// CMB: copy scale to see if it changes
	365	double origScaleX = m_scaleX;
	366	double origScaleY = m_scaleY;
	367
c801d85f KB	368	m_scaleX = m_logicalScaleX * m_userScaleX;
	369	m_scaleY = m_logicalScaleY * m_userScaleY;
	370
	371	m_deviceOriginX = m_internalDeviceOriginX + m_externalDeviceOriginX;
	372	m_deviceOriginY = m_internalDeviceOriginY + m_externalDeviceOriginY;
6f65e337 JS	373
	374	// CMB: if scale has changed call SetPen to recalulate the line width
	375	if (m_scaleX != origScaleX \|\| m_scaleY != origScaleY)
	376	{
	377	// this is a bit artificial, but we need to force wxDC to think
	378	// the pen has changed
	379	wxPen* pen = GetPen();
	380	wxPen tempPen;
	381	m_pen = tempPen;
	382	SetPen(pen);
	383	}
c801d85f KB	384	};
c801d85f KB	385