src/gtk/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()
{
    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()
{
}

bool wxDC::Ok() const
{
    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::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()
{
    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
{
    if (width) *width = m_maxX-m_minX;
    if (height) *height = m_maxY-m_minY;
}

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

void wxDC::SetTextForeground( const wxColour &col )
{
    m_textForegroundColour = col;
}

void wxDC::SetTextBackground( const wxColour &col )
{
    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;
    }
/*  we don't do this mega optimisation
    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 )
{
    // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
    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 )
{
    // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
    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()
{
    // 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
        // It gives an Assert, Robert Roebling
/*
      wxPen pen = m_pen;
      m_pen = wxNullPen;
      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()
	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()
	82	{
	83	}
	84
	85	bool wxDC::Ok() const
	86	{
	87	return m_ok;
	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::DrawPoint( wxPoint& point )
	96	{
	97	DrawPoint( point.x, point.y );
	98	}
	99
	100	void wxDC::DrawPolygon( wxList *list, long xoffset, long yoffset, int fillStyle )
	101	{
	102	int n = list->Number();
	103	wxPoint *points = new wxPoint[n];
	104
	105	int i = 0;
	106	for( wxNode *node = list->First(); node; node = node->Next() )
	107	{
	108	wxPoint point = (wxPoint )node->Data();
	109	points[i].x = point->x;
	110	points[i++].y = point->y;
	111	}
	112
	113	DrawPolygon( n, points, xoffset, yoffset, fillStyle );
	114	delete[] points;
	115	}
	116
	117	void wxDC::DrawLines( wxList *list, long xoffset, long yoffset )
	118	{
	119	int n = list->Number();
	120	wxPoint *points = new wxPoint[n];
	121
	122	int i = 0;
	123	for( wxNode *node = list->First(); node; node = node->Next() )
	124	{
	125	wxPoint point = (wxPoint )node->Data();
	126	points[i].x = point->x;
	127	points[i++].y = point->y;
	128	}
	129
	130	DrawLines( n, points, xoffset, yoffset );
	131	delete []points;
	132	}
	133
	134	void wxDC::DrawSpline( long x1, long y1, long x2, long y2, long x3, long y3 )
	135	{
	136	wxList list;
	137	list.Append( (wxObject*)new wxPoint(x1, y1) );
	138	list.Append( (wxObject*)new wxPoint(x2, y2) );
	139	list.Append( (wxObject*)new wxPoint(x3, y3) );
	140	DrawSpline(&list);
	141	wxNode *node = list.First();
	142	while (node)
	143	{
	144	wxPoint p = (wxPoint)node->Data();
	145	delete p;
	146	node = node->Next();
	147	}
	148	}
	149
	150	void wxDC::DrawSpline( int n, wxPoint points[] )
	151	{
	152	wxList list;
	153	for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
	154	DrawSpline( &list );
	155	}
	156
	157	void wxDC::SetClippingRegion( long x, long y, long width, long height )
	158	{
	159	m_clipping = TRUE;
	160	m_clipX1 = x;
	161	m_clipY1 = y;
	162	m_clipX2 = x + width;
	163	m_clipY2 = y + height;
	164	}
	165
	166	void wxDC::DestroyClippingRegion()
	167	{
	168	m_clipping = FALSE;
	169	}
	170
	171	void wxDC::GetClippingBox( long x, long y, long width, long height ) const
	172	{
	173	if (m_clipping)
	174	{
	175	if (x) *x = m_clipX1;
	176	if (y) *y = m_clipY1;
	177	if (width) *width = (m_clipX2 - m_clipX1);
	178	if (height) *height = (m_clipY2 - m_clipY1);
	179	}
	180	else
	181	{
	182	x = y = width = height = 0;
	183	}
	184	}
	185
	186	void wxDC::GetSize( int* width, int* height ) const
	187	{
	188	if (width) *width = m_maxX-m_minX;
	189	if (height) *height = m_maxY-m_minY;
	190	}
	191
	192	void wxDC::GetSizeMM( long* width, long* height ) const
	193	{
	194	int w = 0;
	195	int h = 0;
	196	GetSize( &w, &h );
	197	if (width) width = long( double(w) / (m_scaleXm_mm_to_pix_x) );
	198	if (height) height = long( double(h) / (m_scaleYm_mm_to_pix_y) );
	199	}
	200
	201	void wxDC::SetTextForeground( const wxColour &col )
	202	{
	203	m_textForegroundColour = col;
	204	}
	205
	206	void wxDC::SetTextBackground( const wxColour &col )
	207	{
	208	m_textBackgroundColour = col;
	209	}
	210
	211	void wxDC::SetMapMode( int mode )
	212	{
	213	switch (mode)
	214	{
	215	case MM_TWIPS:
	216	SetLogicalScale( twips2mmm_mm_to_pix_x, twips2mmm_mm_to_pix_y );
	217	break;
	218	case MM_POINTS:
	219	SetLogicalScale( pt2mmm_mm_to_pix_x, pt2mmm_mm_to_pix_y );
	220	break;
	221	case MM_METRIC:
	222	SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
	223	break;
	224	case MM_LOMETRIC:
	225	SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
	226	break;
	227	default:
	228	case MM_TEXT:
	229	SetLogicalScale( 1.0, 1.0 );
	230	break;
	231	}
	232	/* we don't do this mega optimisation
	233	if (mode != MM_TEXT)
	234	{
	235	m_needComputeScaleX = TRUE;
	236	m_needComputeScaleY = TRUE;
	237	}
	238	*/
	239	}
	240
	241	void wxDC::SetUserScale( double x, double y )
	242	{
	243	// allow negative ? -> no
	244	m_userScaleX = x;
	245	m_userScaleY = y;
	246	ComputeScaleAndOrigin();
	247	}
	248
	249	void wxDC::GetUserScale( double x, double y )
	250	{
	251	if (x) *x = m_userScaleX;
	252	if (y) *y = m_userScaleY;
	253	}
	254
	255	void wxDC::SetLogicalScale( double x, double y )
	256	{
	257	// allow negative ?
	258	m_logicalScaleX = x;
	259	m_logicalScaleY = y;
	260	ComputeScaleAndOrigin();
	261	}
	262
	263	void wxDC::GetLogicalScale( double x, double y )
	264	{
	265	if (x) *x = m_logicalScaleX;
	266	if (y) *y = m_logicalScaleY;
	267	}
	268
	269	void wxDC::SetLogicalOrigin( long x, long y )
	270	{
	271	m_logicalOriginX = x * m_signX; // is this still correct ?
	272	m_logicalOriginY = y * m_signY;
	273	ComputeScaleAndOrigin();
	274	}
	275
	276	void wxDC::GetLogicalOrigin( long x, long y )
	277	{
	278	if (x) *x = m_logicalOriginX;
	279	if (y) *y = m_logicalOriginY;
	280	}
	281
	282	void wxDC::SetDeviceOrigin( long x, long y )
	283	{
	284	// only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
	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	// only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
	299	m_signX = (xLeftRight ? 1 : -1);
	300	m_signY = (yBottomUp ? -1 : 1);
	301	ComputeScaleAndOrigin();
	302	}
	303
	304	long wxDC::DeviceToLogicalX(long x) const
	305	{
	306	return XDEV2LOG(x);
	307	}
	308
	309	long wxDC::DeviceToLogicalY(long y) const
	310	{
	311	return YDEV2LOG(y);
	312	}
	313
	314	long wxDC::DeviceToLogicalXRel(long x) const
	315	{
	316	return XDEV2LOGREL(x);
	317	}
	318
	319	long wxDC::DeviceToLogicalYRel(long y) const
	320	{
	321	return YDEV2LOGREL(y);
	322	}
	323
	324	long wxDC::LogicalToDeviceX(long x) const
	325	{
	326	return XLOG2DEV(x);
	327	}
	328
	329	long wxDC::LogicalToDeviceY(long y) const
	330	{
	331	return YLOG2DEV(y);
	332	}
	333
	334	long wxDC::LogicalToDeviceXRel(long x) const
	335	{
	336	return XLOG2DEVREL(x);
	337	}
	338
	339	long wxDC::LogicalToDeviceYRel(long y) const
	340	{
	341	return YLOG2DEVREL(y);
	342	}
	343
	344	void wxDC::CalcBoundingBox( long x, long y )
	345	{
	346	if (x < m_minX) m_minX = x;
	347	if (y < m_minY) m_minY = y;
	348	if (x > m_maxX) m_maxX = x;
	349	if (y > m_maxY) m_maxY = y;
	350	}
	351
	352	void wxDC::ComputeScaleAndOrigin()
	353	{
	354	// CMB: copy scale to see if it changes
	355	double origScaleX = m_scaleX;
	356	double origScaleY = m_scaleY;
	357
	358	m_scaleX = m_logicalScaleX * m_userScaleX;
	359	m_scaleY = m_logicalScaleY * m_userScaleY;
	360
	361	// CMB: if scale has changed call SetPen to recalulate the line width
	362	if (m_scaleX != origScaleX \|\| m_scaleY != origScaleY)
	363	{
	364	// this is a bit artificial, but we need to force wxDC to think
	365	// the pen has changed
	366	// It gives an Assert, Robert Roebling
	367	/*
	368	wxPen pen = m_pen;
	369	m_pen = wxNullPen;
	370	SetPen( pen );
	371	*/
	372	}
	373	}
	374