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"

#include "gdk/gdk.h"
#include "gtk/gtk.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 = wxMM_TEXT;
    m_needComputeScaleX = FALSE; /* not used yet */
    m_needComputeScaleY = FALSE; /* not used yet */

    m_signX = 1;  /* default x-axis left to right */
    m_signY = 1;  /* default y-axis top down. -1 in postscript. */

    m_maxX = 0;
    m_maxY = 0;
    m_minX = 0;
    m_minY = 0;

    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; /* I'll learn to handle palettes later in my life */
}

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

// Resolution in pixels per logical inch
wxSize wxDC::GetPPI(void) const
{
    // TODO (should probably be pure virtual)
    return wxSize(0, 0);
}

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 wxMM_TWIPS:
          SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
          break;
        case wxMM_POINTS:
          SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
          break;
        case wxMM_METRIC:
          SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
          break;
        case wxMM_LOMETRIC:
          SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
          break;
        default:
        case wxMM_TEXT:
          SetLogicalScale( 1.0, 1.0 );
          break;
    }
/*  we don't do this mega optimisation
    if (mode != wxMM_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	#include "gdk/gdk.h"
	18	#include "gtk/gtk.h"
	19
	20	//-----------------------------------------------------------------------------
	21	// constants
	22	//-----------------------------------------------------------------------------
	23
	24	#define mm2inches 0.0393700787402
	25	#define inches2mm 25.4
	26	#define mm2twips 56.6929133859
	27	#define twips2mm 0.0176388888889
	28	#define mm2pt 2.83464566929
	29	#define pt2mm 0.352777777778
	30
	31	//-----------------------------------------------------------------------------
	32	// wxDC
	33	//-----------------------------------------------------------------------------
	34
	35	IMPLEMENT_ABSTRACT_CLASS(wxDC,wxObject)
	36
	37	wxDC::wxDC()
	38	{
	39	m_ok = FALSE;
	40	m_optimize = FALSE;
	41	m_autoSetting = FALSE;
	42	m_colour = TRUE;
	43	m_clipping = FALSE;
	44
	45	m_mm_to_pix_x = 1.0;
	46	m_mm_to_pix_y = 1.0;
	47
	48	m_logicalOriginX = 0;
	49	m_logicalOriginY = 0;
	50	m_deviceOriginX = 0;
	51	m_deviceOriginY = 0;
	52
	53	m_logicalScaleX = 1.0;
	54	m_logicalScaleY = 1.0;
	55	m_userScaleX = 1.0;
	56	m_userScaleY = 1.0;
	57	m_scaleX = 1.0;
	58	m_scaleY = 1.0;
	59
	60	m_mappingMode = wxMM_TEXT;
	61	m_needComputeScaleX = FALSE; /* not used yet */
	62	m_needComputeScaleY = FALSE; /* not used yet */
	63
	64	m_signX = 1; /* default x-axis left to right */
	65	m_signY = 1; /* default y-axis top down. -1 in postscript. */
	66
	67	m_maxX = 0;
	68	m_maxY = 0;
	69	m_minX = 0;
	70	m_minY = 0;
	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; /* I'll learn to handle palettes later in my life */
	84	}
	85
	86	wxDC::~wxDC()
	87	{
	88	}
	89
	90	bool wxDC::Ok() const
	91	{
	92	return m_ok;
	93	}
	94
	95	void wxDC::DrawArc( long WXUNUSED(x1), long WXUNUSED(y1), long WXUNUSED(x2), long WXUNUSED(y2),
	96	double WXUNUSED(xc), double WXUNUSED(yc) )
	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
	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
	135	DrawLines( n, points, xoffset, yoffset );
	136	delete []points;
	137	}
	138
	139	void wxDC::DrawSpline( long x1, long y1, long x2, long y2, long x3, long y3 )
	140	{
	141	wxList list;
	142	list.Append( (wxObject*)new wxPoint(x1, y1) );
	143	list.Append( (wxObject*)new wxPoint(x2, y2) );
	144	list.Append( (wxObject*)new wxPoint(x3, y3) );
	145	DrawSpline(&list);
	146	wxNode *node = list.First();
	147	while (node)
	148	{
	149	wxPoint p = (wxPoint)node->Data();
	150	delete p;
	151	node = node->Next();
	152	}
	153	}
	154
	155	void wxDC::DrawSpline( int n, wxPoint points[] )
	156	{
	157	wxList list;
	158	for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
	159	DrawSpline( &list );
	160	}
	161
	162	void wxDC::SetClippingRegion( long x, long y, long width, long height )
	163	{
	164	m_clipping = TRUE;
	165	m_clipX1 = x;
	166	m_clipY1 = y;
	167	m_clipX2 = x + width;
	168	m_clipY2 = y + height;
	169	}
	170
	171	void wxDC::DestroyClippingRegion()
	172	{
	173	m_clipping = FALSE;
	174	}
	175
	176	void wxDC::GetClippingBox( long x, long y, long width, long height ) const
	177	{
	178	if (m_clipping)
	179	{
	180	if (x) *x = m_clipX1;
	181	if (y) *y = m_clipY1;
	182	if (width) *width = (m_clipX2 - m_clipX1);
	183	if (height) *height = (m_clipY2 - m_clipY1);
	184	}
	185	else
	186	{
	187	x = y = width = height = 0;
	188	}
	189	}
	190
	191	void wxDC::GetSize( int* width, int* height ) const
	192	{
	193	if (width) *width = m_maxX-m_minX;
	194	if (height) *height = m_maxY-m_minY;
	195	}
	196
	197	void wxDC::GetSizeMM( int* width, int* height ) const
	198	{
	199	int w = 0;
	200	int h = 0;
	201	GetSize( &w, &h );
	202	if (width) width = int( double(w) / (m_scaleXm_mm_to_pix_x) );
	203	if (height) height = int( double(h) / (m_scaleYm_mm_to_pix_y) );
	204	}
	205
	206	// Resolution in pixels per logical inch
	207	wxSize wxDC::GetPPI(void) const
	208	{
	209	// TODO (should probably be pure virtual)
	210	return wxSize(0, 0);
	211	}
	212
	213	void wxDC::SetTextForeground( const wxColour &col )
	214	{
	215	m_textForegroundColour = col;
	216	}
	217
	218	void wxDC::SetTextBackground( const wxColour &col )
	219	{
	220	m_textBackgroundColour = col;
	221	}
	222
	223	void wxDC::SetMapMode( int mode )
	224	{
	225	switch (mode)
	226	{
	227	case wxMM_TWIPS:
	228	SetLogicalScale( twips2mmm_mm_to_pix_x, twips2mmm_mm_to_pix_y );
	229	break;
	230	case wxMM_POINTS:
	231	SetLogicalScale( pt2mmm_mm_to_pix_x, pt2mmm_mm_to_pix_y );
	232	break;
	233	case wxMM_METRIC:
	234	SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
	235	break;
	236	case wxMM_LOMETRIC:
	237	SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
	238	break;
	239	default:
	240	case wxMM_TEXT:
	241	SetLogicalScale( 1.0, 1.0 );
	242	break;
	243	}
	244	/* we don't do this mega optimisation
	245	if (mode != wxMM_TEXT)
	246	{
	247	m_needComputeScaleX = TRUE;
	248	m_needComputeScaleY = TRUE;
	249	}
	250	*/
	251	}
	252
	253	void wxDC::SetUserScale( double x, double y )
	254	{
	255	// allow negative ? -> no
	256	m_userScaleX = x;
	257	m_userScaleY = y;
	258	ComputeScaleAndOrigin();
	259	}
	260
	261	void wxDC::GetUserScale( double x, double y )
	262	{
	263	if (x) *x = m_userScaleX;
	264	if (y) *y = m_userScaleY;
	265	}
	266
	267	void wxDC::SetLogicalScale( double x, double y )
	268	{
	269	// allow negative ?
	270	m_logicalScaleX = x;
	271	m_logicalScaleY = y;
	272	ComputeScaleAndOrigin();
	273	}
	274
	275	void wxDC::GetLogicalScale( double x, double y )
	276	{
	277	if (x) *x = m_logicalScaleX;
	278	if (y) *y = m_logicalScaleY;
	279	}
	280
	281	void wxDC::SetLogicalOrigin( long x, long y )
	282	{
	283	m_logicalOriginX = x * m_signX; // is this still correct ?
	284	m_logicalOriginY = y * m_signY;
	285	ComputeScaleAndOrigin();
	286	}
	287
	288	void wxDC::GetLogicalOrigin( long x, long y )
	289	{
	290	if (x) *x = m_logicalOriginX;
	291	if (y) *y = m_logicalOriginY;
	292	}
	293
	294	void wxDC::SetDeviceOrigin( long x, long y )
	295	{
	296	// only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
	297	m_deviceOriginX = x;
	298	m_deviceOriginY = y;
	299	ComputeScaleAndOrigin();
	300	}
	301
	302	void wxDC::GetDeviceOrigin( long x, long y )
	303	{
	304	if (x) *x = m_deviceOriginX;
	305	if (y) *y = m_deviceOriginY;
	306	}
	307
	308	void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
	309	{
	310	// only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
	311	m_signX = (xLeftRight ? 1 : -1);
	312	m_signY = (yBottomUp ? -1 : 1);
	313	ComputeScaleAndOrigin();
	314	}
	315
	316	long wxDC::DeviceToLogicalX(long x) const
	317	{
	318	return XDEV2LOG(x);
	319	}
	320
	321	long wxDC::DeviceToLogicalY(long y) const
	322	{
	323	return YDEV2LOG(y);
	324	}
	325
	326	long wxDC::DeviceToLogicalXRel(long x) const
	327	{
	328	return XDEV2LOGREL(x);
	329	}
	330
	331	long wxDC::DeviceToLogicalYRel(long y) const
	332	{
	333	return YDEV2LOGREL(y);
	334	}
	335
	336	long wxDC::LogicalToDeviceX(long x) const
	337	{
	338	return XLOG2DEV(x);
	339	}
	340
	341	long wxDC::LogicalToDeviceY(long y) const
	342	{
	343	return YLOG2DEV(y);
	344	}
	345
	346	long wxDC::LogicalToDeviceXRel(long x) const
	347	{
	348	return XLOG2DEVREL(x);
	349	}
	350
	351	long wxDC::LogicalToDeviceYRel(long y) const
	352	{
	353	return YLOG2DEVREL(y);
	354	}
	355
	356	void wxDC::CalcBoundingBox( long x, long y )
	357	{
	358	if (x < m_minX) m_minX = x;
	359	if (y < m_minY) m_minY = y;
	360	if (x > m_maxX) m_maxX = x;
	361	if (y > m_maxY) m_maxY = y;
	362	}
	363
	364	void wxDC::ComputeScaleAndOrigin()
	365	{
	366	// CMB: copy scale to see if it changes
	367	double origScaleX = m_scaleX;
	368	double origScaleY = m_scaleY;
	369
	370	m_scaleX = m_logicalScaleX * m_userScaleX;
	371	m_scaleY = m_logicalScaleY * m_userScaleY;
	372
	373	// CMB: if scale has changed call SetPen to recalulate the line width
	374	if (m_scaleX != origScaleX \|\| m_scaleY != origScaleY)
	375	{
	376	// this is a bit artificial, but we need to force wxDC to think
	377	// the pen has changed
	378	// It gives an Assert, Robert Roebling
	379	/*
	380	wxPen pen = m_pen;
	381	m_pen = wxNullPen;
	382	SetPen( pen );
	383	*/
	384	}
	385	}
	386